SIST EN ISO 21813:2023

Fine ceramics (advanced ceramics, advanced technical ceramics) - Methods for chemical analysis of high purity barium titanate powders (ISO 21813:2019)

ISO 21813 specifies methods for the chemical analysis of fine high purity barium titanate powders used as the raw material for fine ceramics.
ISO 21813 stipulates the determination methods of the barium, titanium, aluminium, cadmium, calcium, cobalt, dysprosium, iron, lead, magnesium, manganese, nickel, niobium, potassium, silicon, sodium, strontium, vanadium, zirconium, carbon, oxygen and nitrogen contents in high purity barium titanate powders. The barium and titanium contents, the major elements, are determined by using an acid decomposition-gravimetric method or an acid decomposition-inductively coupled plasma-optical emission spectrometry (ICP-OES) method. The aluminium, cadmium, calcium, chromium, cobalt, dysprosium, iron, lead, magnesium, manganese, nickel, niobium, potassium, silicon, strontium, vanadium and zirconium contents are simultaneously determined via an acid digestion-ICP-OES method. The nitrogen content is determined by using an inert gas fusion-thermal conductivity method, while that of oxygen is determined via an inert gas fusion-IR absorption spectrometry method. Finally, the carbon content is determined using a combustion-IR absorption spectrometry method or a combustion-conductometry method.

Hochleistungskeramik - Verfahren zur chemischen Analyse von hochreinen Bariumtitanatpulvern (ISO 21813:2019)

Dieses Dokument legt Verfahren für die chemische Analyse von feinen, hochreinen Bariumtitanatpulvern fest, die als Rohmaterial für Hochleistungskeramiken verwendet werden.
Dieses Dokument legt die Verfahren zur Bestimmung des Barium-, Titan-, Aluminium-, Cadmium-, Calcium-, Cobalt-, Dysprosium-, Eisen-, Blei-, Magnesium-, Mangan-, Nickel-, Niob-, Kalium-, Silicium-, Natrium-, Strontium-, Vanadium-, Zirkonium-, Kohlenstoff-, Sauerstoff- und Stickstoffgehaltes in hochreinen Bariumtitanatpulvern fest. Der Barium  und Titangehalt, die wesentlichen Elemente, werden mithilfe eines gravimetrischen Verfahrens mit Säureaufschluss oder eines Verfahrens mit Säureaufschluss kombiniert mit optischer Emissionsspektrometrie mit induktiv gekoppeltem Plasma (en: inductively coupled plasma optical emission spectrometry, ICP-OES) bestimmt. Die Aluminium-, Cadmium-, Calcium-, Chrom-, Cobalt-, Dysprosium-, Eisen-, Blei-, Magnesium-, Mangan-, Nickel-, Niob-, Kalium-, Silicium-, Strontium-, Vanadium- und Zirkoniumgehalte werden simultan mithilfe einem Verfahren von Säureaufschluss mit ICP-OES bestimmt. Der Stickstoffgehalt wird mithilfe eines -Inertgasschmelzverfahrens mit Wärmeleitfähigkeitsdetektion bestimmt, während der Sauerstoffgehalt mithilfe eines Inertgasschmelzverfahrens mit IR-Absorptionsspektroskopie bestimmt wird. Der Kohlenstoffgehalt wird abschließend mithilfe eines Verbrennungs-IR-Absorptionsspektrometrieverfahrens oder eines Verbrennungs-Konduktometrie-Verfahrens bestimmt.

Céramiques techniques - Méthodes d’analyse chimique des poudres de titanate de baryum à haute pureté (ISO 21813:2019)

Le présent document spécifie des méthodes d'analyse chimique de poudres fines de titanate de baryum de haute pureté utilisées comme matière première pour les céramiques techniques.
Le présent document spécifie les méthodes de détermination des teneurs en baryum, titane, aluminium, cadmium, calcium, cobalt, dysprosium, fer, plomb, magnésium, manganèse, nickel, niobium, potassium, silicium, sodium, strontium, vanadium, zirconium, carbone, oxygène et azote dans les poudres de titane de baryum de haute pureté. Les teneurs en baryum et en titane (les éléments principaux) sont déterminées au moyen d’une méthode par gravimétrie après décomposition en milieu acide ou d’une méthode par spectrométrie d’émission optique à plasma induit (ICP-OES) après décomposition en milieu acide. Les teneurs en aluminium, cadmium, calcium, chrome, cobalt, dysprosium, fer, plomb, magnésium, manganèse, nickel, niobium, potassium, silicium, strontium, vanadium et zirconium sont déterminées simultanément au moyen d’une méthode par ICP-OES après minéralisation en milieu acide. La teneur en azote est déterminée à l’aide d’une méthode par conductivité thermique après fusion sous gaz inerte, tandis que celle de l’oxygène est déterminée en utilisant une méthode par spectrométrie d’absorption infrarouge après fusion sous gaz inerte. Enfin, la teneur en carbone est déterminée au moyen d'une méthode par spectrométrie d’absorption infrarouge après combustion ou d’une méthode par conductométrie après combustion.

Fina keramika (sodobna keramika, sodobna tehnična keramika) - Metode za kemijsko analizo praškov barijevega titanata visoke čistosti (ISO 21813:2019)

Standard ISO 21813 določa metode za kemijsko analizo finih praškov barijevega titanata visoke čistosti, ki se uporabljajo kot surovina za fino keramiko.
Standard ISO 21813 določa metode za določevanje vsebnosti barija, titana, aluminija, kadmija, kalcija, kobalta, disprozija, železa, svinca, magnezija, mangana, niklja, niobija, kalija, silicija, natrija, stroncija, vanadija, cirkonija, ogljika, kisika in dušika v praških barijevega titanata visoke čistosti. Vsebnost barija in titana – glavnih elementov – se določi z uporabo gravimetrične metode v kombinaciji s kislinsko razgradnjo ali metode optične emisijske spektrometrije z induktivno sklopljeno plazmo (ICP-OES) v kombinaciji s kislinsko razgradnjo. Vsebnost aluminija, kadmija, kalcija, kroma, kobalta, disprozija, železa, svinca, magnezija, mangana, niklja, niobija, kalija, silicija, stroncija, vanadija in cirkonija se hkrati določi z uporabo metode optične emisijske spektrometrije z induktivno sklopljeno plazmo v kombinaciji z razklopom v kislini. Vsebnost dušika se določi z uporabo metode toplotne prevodnosti v kombinaciji s fuzijo inertnega plina, vsebnost kisika pa z metodo IR-absorpcijske spektrometrije v kombinaciji s fuzijo inertnega plina. Vsebnost ogljika se določi z uporabo metode IR-absorpcijske spektrometrije v kombinaciji z zgorevanjem ali metode konduktometrije v kombinaciji z zgorevanjem.

General Information

• Status: Published
• Public Enquiry End Date: 27-Sep-2022
• Publication Date: 24-Nov-2022
• ICS: 81.060.30 - Advanced ceramics
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 23-Nov-2022
• Due Date: 28-Jan-2023
• Completion Date: 25-Nov-2022
• Ref Project: EN ISO 21813:2022 - Fine ceramics (advanced ceramics, advanced technical ceramics) - Methods for chemical analysis of high purity barium titanate powders (ISO 21813:2019)

Relations

• Replaces: SIST EN 725-2:2009 - Advanced technical ceramics - Methods of test for ceramic powders - Part 2: Determination of impurities in barium titanate
• Effective Date: 16-Nov-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 21813:2023
01-januar-2023
Nadomešča:
SIST EN 725-2:2009
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Metode za
kemijsko analizo praškov barijevega titanata visoke čistosti (ISO 21813:2019)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Methods for
chemical analysis of high purity barium titanate powders (ISO 21813:2019)
Hochleistungskeramik - Verfahren zur chemischen Analyse von hochreinen
Bariumtitanatpulvern (ISO 21813:2019)
Céramiques techniques - Méthodes d’analyse chimique des poudres de titanate de
baryum à haute pureté (ISO 21813:2019)
Ta slovenski standard je istoveten z: EN ISO 21813:2022
ICS:
81.060.30 Sodobna keramika Advanced ceramics
SIST EN ISO 21813:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 21813:2023

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SIST EN ISO 21813:2023


EN ISO 21813
EUROPEAN STANDARD

NORME EUROPÉENNE

November 2022
EUROPÄISCHE NORM
ICS 81.060.30 Supersedes EN 725-2:2007
English Version

Fine ceramics (advanced ceramics, advanced technical
ceramics) - Methods for chemical analysis of high purity
barium titanate powders (ISO 21813:2019)
Céramiques techniques - Méthodes d'analyse chimique Hochleistungskeramik - Verfahren zur chemischen
des poudres de titanate de baryum à haute pureté (ISO Analyse von hochreinen Bariumtitanatpulvern (ISO
21813:2019) 21813:2019)
This European Standard was approved by CEN on 30 October 2022.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21813:2022 E
worldwide for CEN national Members.

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SIST EN ISO 21813:2023
EN ISO 21813:2022 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 21813:2023
EN ISO 21813:2022 (E)
European foreword
The text of ISO 21813:2019 has been prepared by Technical Committee ISO/TC 206 "Fine ceramics” of
the International Organization for Standardization (ISO) and has been taken over as EN ISO 21813:2022
by Technical Committee CEN/TC 184 “Advanced technical ceramics” the secretariat of which is held by
DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2023, and conflicting national standards shall be
withdrawn at the latest by May 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 725-2:2007.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 21813:2019 has been approved by CEN as EN ISO 21813:2022 without any modification.

3

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SIST EN ISO 21813:2023

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SIST EN ISO 21813:2023
INTERNATIONAL ISO
STANDARD 21813
First edition
2019-02
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Methods for chemical analysis of high
purity barium titanate powders
Céramiques techniques — Méthodes d’analyse chimique des poudres
de titanate de baryum à haute pureté
Reference number
ISO 21813:2019(E)
©
ISO 2019

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SIST EN ISO 21813:2023
ISO 21813:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

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SIST EN ISO 21813:2023
ISO 21813:2019(E)

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Analytes and ranges . 1
5 Preparation of test sample . 2
5.1 General . 2
5.2 Sampling . 2
5.3 Drying . 2
5.4 Weighing . 3
6 Reporting the analytical values . 3
6.1 Number of analyses. 3
6.2 Blank test . 3
6.3 Evaluation of the analytical values. 3
6.4 Expression of the analytical values . 3
7 Determination of the barium and titanium contents . 3
7.1 Classification of the determination methods . 3
7.2 Acid decomposition-gravimetric method . 4
7.2.1 Principle . 4
7.2.2 Reagents . 4
7.2.3 Apparatus . 4
7.2.4 Procedure . 5
7.2.5 Blank test . 5
7.2.6 Calculation . 5
7.3 Acid decomposition-ICP-OES method . 6
7.3.1 Principle . 6
7.3.2 Reagents . 6
7.3.3 Apparatus . 6
7.3.4 Procedure . 6
7.3.5 Blank test . 7
7.3.6 Drawing of the calibration curve . 7
7.3.7 Calculation . 7
8 Determination of the trace element contents . 7
8.1 Principle . 7
8.2 Reagents. 7
8.3 Apparatus . 8
8.4 Procedure . 8
8.5 Blank test . 9
8.6 Drawing of the calibration curve . 9
8.7 Calculation . 9
9 Determination of the total nitrogen content . 9
9.1 Principle . 9
9.2 Reagents.10
9.3 Apparatus .10
9.4 Instrument .10
9.5 Procedure .11
9.5.1 Starting up of the instrument .11
9.5.2 Preliminary heating . .12
9.5.3 Degassing of the graphite crucible .12
9.5.4 Measuring .12
9.6 Blank test .12
© ISO 2019 – All rights reserved iii

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SIST EN ISO 21813:2023
ISO 21813:2019(E)

9.7 Calculation of the calibration coefficient .12
9.8 Calculation .13
10 Determination of the oxygen content .13
10.1 Principle .13
10.2 Reagents.13
10.3 Apparatus .13
10.4 Instrument .13
10.5 Procedure .13
10.6 Blank test .14
10.7 Calculation of the calibration coefficient .14
10.8 Calculation .14
11 Determination of the carbon content .14
11.1 Classification of the determination methods .14
11.2 Combustion (resistance furnace)-IR absorption spectrometry .15
11.2.1 Principle .15
11.2.2 Reagents .15
11.2.3 Apparatus .15
11.2.4 Instrument .15
11.2.5 Procedure .16
11.2.6 Blank test .17
11.2.7 Calculation of the calibration coefficient .17
11.2.8 Calculation .18
11.3 Combustion (radio frequency heating furnace)-thermal conductometry .18
11.3.1 Principle .18
11.3.2 Reagents .18
11.3.3 Apparatus .18
11.3.4 Instrument .18
11.3.5 Procedure .19
11.3.6 Blank test .20
11.3.7 Calculation of the calibration coefficient .20
11.3.8 Calculation .20
11.4 Combustion (radio frequency heating furnace)-IR absorption spectrometry .20
11.4.1 Principle .20
11.4.2 Reagents .20
11.4.3 Apparatus .20
11.4.4 Instrument .20
11.4.5 Procedure .21
11.4.6 Blank test .22
11.4.7 Calculation of the calibration coefficient .22
11.4.8 Calculation .22
12 Test report .22
Annex A (informative) Analytical results obtained from the round-robin test .23
Bibliography .25
iv © ISO 2019 – All rights reserved

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SIST EN ISO 21813:2023
ISO 21813:2019(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 206, Fine ceramics.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
© ISO 2019 – All rights reserved v

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SIST EN ISO 21813:2023

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SIST EN ISO 21813:2023
INTERNATIONAL STANDARD ISO 21813:2019(E)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Methods for chemical analysis of high purity
barium titanate powders
1 Scope
This document specifies methods for the chemical analysis of fine high purity barium titanate powders
used as the raw material for fine ceramics.
This document stipulates the determination methods of the barium, titanium, aluminium, cadmium,
calcium, cobalt, dysprosium, iron, lead, magnesium, manganese, nickel, niobium, potassium, silicon,
sodium, strontium, vanadium, zirconium, carbon, oxygen and nitrogen contents in high purity barium
titanate powders. The barium and titanium contents, the major elements, are determined by using
an acid decomposition-gravimetric method or an acid decomposition-inductively coupled plasma-
optical emission spectrometry (ICP-OES) method. The aluminium, cadmium, calcium, chromium,
cobalt, dysprosium, iron, lead, magnesium, manganese, nickel, niobium, potassium, silicon, strontium,
vanadium and zirconium contents are simultaneously determined via an acid digestion-ICP-OES
method. The nitrogen content is determined by using an inert gas fusion-thermal conductivity method,
while that of oxygen is determined via an inert gas fusion-IR absorption spectrometry method.
Finally, the carbon content is determined using a combustion-IR absorption spectrometry method or a
combustion-conductometry method.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 6353-1, Reagents for chemical analysis — Part 1: General test methods
ISO 6353-2, Reagents for chemical analysis — Part 2: Specifications — First series
ISO 6353-3, Reagents for chemical analysis — Part 3: Specifications — Second series
ISO 8656-1, Refractory products — Sampling of raw materials and unshaped products — Part 1:
Sampling scheme
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Analytes and ranges
a) Barium (Ba), range of 40 % to 60 % (mass fraction).
© ISO 2019 – All rights reserved 1

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SIST EN ISO 21813:2023
ISO 21813:2019(E)

b) Titanium (Ti), range of 10 % to 30 % (mass fraction).
c) Aluminium (Al), range of 0
...

SLOVENSKI STANDARD
oSIST prEN ISO 21813:2022
01-september-2022
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Metode za
kemijsko analizo praškov barijevega titanata visoke čistosti (ISO 21813:2019)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Methods for
chemical analysis of high purity barium titanate powders (ISO 21813:2019)
Hochleistungskeramik - Verfahren zur chemischen Analyse von hochreinen
Bariumtitanatpulvern (ISO 21813:2019)
Céramiques techniques - Méthodes d’analyse chimique des poudres de titanate de
baryum à haute pureté (ISO 21813:2019)
Ta slovenski standard je istoveten z: prEN ISO 21813
ICS:
81.060.30 Sodobna keramika Advanced ceramics
oSIST prEN ISO 21813:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 21813:2022

---------------------- Page: 2 ----------------------
oSIST prEN ISO 21813:2022
INTERNATIONAL ISO
STANDARD 21813
First edition
2019-02
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Methods for chemical analysis of high
purity barium titanate powders
Céramiques techniques — Méthodes d’analyse chimique des poudres
de titanate de baryum à haute pureté
Reference number
ISO 21813:2019(E)
©
ISO 2019

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oSIST prEN ISO 21813:2022
ISO 21813:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST prEN ISO 21813:2022
ISO 21813:2019(E)

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Analytes and ranges . 1
5 Preparation of test sample . 2
5.1 General . 2
5.2 Sampling . 2
5.3 Drying . 2
5.4 Weighing . 3
6 Reporting the analytical values . 3
6.1 Number of analyses. 3
6.2 Blank test . 3
6.3 Evaluation of the analytical values. 3
6.4 Expression of the analytical values . 3
7 Determination of the barium and titanium contents . 3
7.1 Classification of the determination methods . 3
7.2 Acid decomposition-gravimetric method . 4
7.2.1 Principle . 4
7.2.2 Reagents . 4
7.2.3 Apparatus . 4
7.2.4 Procedure . 5
7.2.5 Blank test . 5
7.2.6 Calculation . 5
7.3 Acid decomposition-ICP-OES method . 6
7.3.1 Principle . 6
7.3.2 Reagents . 6
7.3.3 Apparatus . 6
7.3.4 Procedure . 6
7.3.5 Blank test . 7
7.3.6 Drawing of the calibration curve . 7
7.3.7 Calculation . 7
8 Determination of the trace element contents . 7
8.1 Principle . 7
8.2 Reagents. 7
8.3 Apparatus . 8
8.4 Procedure . 8
8.5 Blank test . 9
8.6 Drawing of the calibration curve . 9
8.7 Calculation . 9
9 Determination of the total nitrogen content . 9
9.1 Principle . 9
9.2 Reagents.10
9.3 Apparatus .10
9.4 Instrument .10
9.5 Procedure .11
9.5.1 Starting up of the instrument .11
9.5.2 Preliminary heating . .12
9.5.3 Degassing of the graphite crucible .12
9.5.4 Measuring .12
9.6 Blank test .12
© ISO 2019 – All rights reserved iii

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oSIST prEN ISO 21813:2022
ISO 21813:2019(E)

9.7 Calculation of the calibration coefficient .12
9.8 Calculation .13
10 Determination of the oxygen content .13
10.1 Principle .13
10.2 Reagents.13
10.3 Apparatus .13
10.4 Instrument .13
10.5 Procedure .13
10.6 Blank test .14
10.7 Calculation of the calibration coefficient .14
10.8 Calculation .14
11 Determination of the carbon content .14
11.1 Classification of the determination methods .14
11.2 Combustion (resistance furnace)-IR absorption spectrometry .15
11.2.1 Principle .15
11.2.2 Reagents .15
11.2.3 Apparatus .15
11.2.4 Instrument .15
11.2.5 Procedure .16
11.2.6 Blank test .17
11.2.7 Calculation of the calibration coefficient .17
11.2.8 Calculation .18
11.3 Combustion (radio frequency heating furnace)-thermal conductometry .18
11.3.1 Principle .18
11.3.2 Reagents .18
11.3.3 Apparatus .18
11.3.4 Instrument .18
11.3.5 Procedure .19
11.3.6 Blank test .20
11.3.7 Calculation of the calibration coefficient .20
11.3.8 Calculation .20
11.4 Combustion (radio frequency heating furnace)-IR absorption spectrometry .20
11.4.1 Principle .20
11.4.2 Reagents .20
11.4.3 Apparatus .20
11.4.4 Instrument .20
11.4.5 Procedure .21
11.4.6 Blank test .22
11.4.7 Calculation of the calibration coefficient .22
11.4.8 Calculation .22
12 Test report .22
Annex A (informative) Analytical results obtained from the round-robin test .23
Bibliography .25
iv © ISO 2019 – All rights reserved

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oSIST prEN ISO 21813:2022
ISO 21813:2019(E)

Foreword
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electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
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on the ISO list of patent declarations received (see www .iso .org/patents).
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.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 206, Fine ceramics.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
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oSIST prEN ISO 21813:2022
INTERNATIONAL STANDARD ISO 21813:2019(E)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Methods for chemical analysis of high purity
barium titanate powders
1 Scope
This document specifies methods for the chemical analysis of fine high purity barium titanate powders
used as the raw material for fine ceramics.
This document stipulates the determination methods of the barium, titanium, aluminium, cadmium,
calcium, cobalt, dysprosium, iron, lead, magnesium, manganese, nickel, niobium, potassium, silicon,
sodium, strontium, vanadium, zirconium, carbon, oxygen and nitrogen contents in high purity barium
titanate powders. The barium and titanium contents, the major elements, are determined by using
an acid decomposition-gravimetric method or an acid decomposition-inductively coupled plasma-
optical emission spectrometry (ICP-OES) method. The aluminium, cadmium, calcium, chromium,
cobalt, dysprosium, iron, lead, magnesium, manganese, nickel, niobium, potassium, silicon, strontium,
vanadium and zirconium contents are simultaneously determined via an acid digestion-ICP-OES
method. The nitrogen content is determined by using an inert gas fusion-thermal conductivity method,
while that of oxygen is determined via an inert gas fusion-IR absorption spectrometry method.
Finally, the carbon content is determined using a combustion-IR absorption spectrometry method or a
combustion-conductometry method.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 6353-1, Reagents for chemical analysis — Part 1: General test methods
ISO 6353-2, Reagents for chemical analysis — Part 2: Specifications — First series
ISO 6353-3, Reagents for chemical analysis — Part 3: Specifications — Second series
ISO 8656-1, Refractory products — Sampling of raw materials and unshaped products — Part 1:
Sampling scheme
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Analytes and ranges
a) Barium (Ba), range of 40 % to 60 % (mass fraction).
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ISO 21813:2019(E)

b) Titanium (Ti), range of 10 % to 30 % (mass fraction).
c) Aluminium (Al), range of 0,001 % to 0,03 % (mass fraction).
d) Cadmium (Cd), range of 0,001 % to 0,03 % (mass fraction).
e) Calcium (Ca), range of 0,001 % to 0,03 % (mass fraction).
f) Cobalt (Co), range of 0,001 % to 0,03 % (mass fraction).
g) Dysprosium (Dy), range of 0,001 % to 0,03 % (mass fraction).
h) Iron (Fe), range of 0,001 % to 0,03 % (mass fraction).
i) Lead (Pb), range of 0,001 % to 0,03 % (mass fraction).
j) Magnesium (Mg), range of 0,001 % to 0,03 % (mass fraction).
k) Manganese (Mn), range of 0,001 % to 0,03 % (mass fraction).
l) Nickel (Ni), range of 0,001 % to 0,03 % (mass fraction).
m) Niobium (Nb), range of 0,001 % to 0,03 % (mass fraction).
n) Potassium (K), range of 0,001 % to 0,03 % (mass fraction).
o) Silicon (Si), range of 0,001 % to 0,03 % (mass fraction).
p) Sodium (Na), range of 0,001 % to 0,03 % (mass fraction).
q) Strontium (Sr), range of 0,001 % to 0,03 % (mass fraction).
r) Vanadium (V), range of 0,001 % to 0,03 % (mass fraction).
s) Zirconium (Zr), range of 0,001 % to 0,03 % (mass fraction).
t) Total nitrogen (T.N), range of 0,01 % to 5 % (mass fraction).
u) Oxygen (O), range of 10 % to 30 % (mass fraction).
v) Carbon (C), range of 0,01 % to 5 % (mass fraction).
5 Preparation of test sample
5.1 General
The sample preparation method shall be in accordance with ISO 8656-1, unless otherwise mutually
agreed upon by the analyser and customer.
5.2 Sampling
The sample shall be collected in accordance with ISO 8656-1.
5.3 Drying
Place a 10 g sample into a flat-type weighing bottle (60 mm × 30 mm) and spread it uniformly over the
bottom of the bottle. Place the bottle in an air bath at 110 °C ± 5 °C for 2 h, uncovered, and cool in a
desiccator (desiccant: magnesium perchlorate), covered, for 1 h.
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5.4 Weighing
Weigh the sample to the nearest 0,1 mg of the required quantity using a balance.
6 Reporting the analytical values
6.1 Number of analyses
Analyse the sample twice on different days.
6.2 Blank test
Upon analysis, perform a blank test to correct the measured values.
6.3 Evaluation of the analytical values
When the difference between the two analytical values does not exceed the tolerance value (Table 1),
the average value shall be reported. When the difference between the two analytical values exceeds the
tolerance value, perform two additional analyses. When the difference in these further two analyses
does not exceed the tolerance value, the average value thereof shall be reported. If the difference also
exceeds the tolerance value, the median of four analytical values shall be reported.
6.4 Expression of the analytical values
The analytical values shall be given in % (mass fraction), in dryness.
a) Barium, titanium, oxygen, and nitrogen: express the results to two decimal places.
b) Others: express the results to three decimal places.
Table 1 — Tolerances for the analytical values
Units: % (mass fraction)
Al, Cd, Ca, Co, Dy, Fe, Pb, Mg, Mn, Ni,
Element Ba Ti Total N O C
Nb, K, Si, Na, Sr, V, Zr,
a a c e
0,30 0,20 0,001 0,01
Tolerance 0,50 0,005
b b d f
0,40 0,30 0,005 0,05
a
Acid decomposition-gravimetric method.
b
Acid decomposition-ICP-OES method.
c
Applicable to content of less than 0,01 % (mass fraction).
d
Applicable to content of not less than 0,01 % (mass fraction).
e
Applicable to content of less than 1,0 % (mass fraction).
f
Applicable to content of not less than 1,0 % (mass fraction).
7 Determination of the barium and titanium contents
7.1 Classification of the determination methods
The barium and titanium contents shall be determined by either of the following methods:
— Method A, acid decomposition-gravimetric method;
— Method B, acid decomposition-ICP-OES method.
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If analytical results with four significant figures are required, use method A; if two or three significant
figures are required, method B can be used.
7.2 Acid decomposition-gravimetric method
7.2.1 Principle
A portion of the sample is decomposed using hydrogen peroxid
...