EN ISO 18757:2005

Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of specific surface area of ceramic powders by gas adsorption using the BET method (ISO 18757:2003)

ISO 18757:2003 provides guidelines for the determination of the total specific external and internal surface area of disperse or porous (pore diameter greater than 2 nm) fine ceramic materials by measuring the amount of physically adsorbed gas according to the method of Brunauer, Emmett and Teller (BET method). This International Standard only focuses on specific details relevant to fine ceramic materials. It should further be noted that the BET method cannot be applied to type I isotherms (microporous materials or chemisorption behaviour) or when the solid adsorbs the measuring gas.

Hochleistungskeramik - Bestimmung der spezifischen Oberfläche keramischer Pulver durch Gasadsorption nach dem BET-Verfahren (ISO 18757:2003)

Diese Internationale Norm gibt Leitlinien zur Bestimmung der gesamten spezifischen äußeren und inneren
Oberfläche von dispergierten oder porösen (Porendurchmesser > 2 nm) feinkeramischen Werkstoffen, wobei
nach dem Verfahren von Brunauer, Emmet und Teller (BET-Verfahren) [1] die Menge des physikalisch
adsorbierten Gases gemessen wird. Allgemeine Verfahrensleitlinien werden in ISO 9277 beschrieben. Die
vorliegende Internationale Norm konzentriert sich auf bestimmte Einzelheiten, die für feinkeramische
Werkstoffe von Bedeutung sind. Es sollte berücksichtigt werden, dass das BET-Verfahren nicht auf
Isothermen des Typs I (Werkstoffe mit Mikroporen oder chemisorptivem Verhalten) oder in den Fällen
angewendet werden kann, in denen der Feststoff das Messgas absorbiert.
ANMERKUNG Weitere Einzelheiten zum Anwendungsbereich sind aus den Literaturhinweisen [2], [3] mit Empfeh-lungen
von IUPAC oder aus dem Lehrbuch von Gregg und Sing [4] zu entnehmen.

Céramiques techniques - Détermination de la surface spécifique (aire massique) des poudres céramiques par adsorption de gaz à l'aide de la méthode BET (ISO 18757:2003)

L'ISO 18757:2003 donne des lignes directrices pour la détermination de la surface spécifique (aire massique) totale externe et interne des matériaux céramiques fins dispersés ou poreux (diamètre de pore supérieur à 2 nm) par mesurage de la quantité de gaz physiquement adsorbée, conformément à la méthode de Brunauer, Emmet et Teller (méthode BET). Les grandes lignes de la méthode sont décrites dans l'ISO 9277. L'ISO 18757:2003 n'est axée que sur les détails particuliers applicables aux céramiques fines. Il convient de noter par ailleurs que la méthode BET n'est pas utilisable pour les isothermes de type 1 (matériaux microporeux ou pour lesquels le contact se fait par chimisorption) ou pour les solides qui absorbent le gaz de mesure.

Fina keramika (sodobna keramika, sodobna tehnična keramika) – Določanje specifične površine keramičnih praškov z adsorpcijo plina po metodi BET (ISO 18757:2003)

General Information

• Status: Published
• Publication Date: 18-Oct-2005
• Withdrawal Date: 29-Apr-2006
• ICS: 81.060.30 - Advanced ceramics
• Technical Committee: CEN/TC 184 - Advanced technical ceramics
• Drafting Committee: CEN/TC 184 - Advanced technical ceramics
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 19-Oct-2005
• Completion Date: 19-Oct-2005
• Mandate: M/BC/CEN/90/4 - Request concerning the realisation of a standardization programme in the field of advanced technical ceramics
• Ref Project: SIST EN ISO 18757:2006 - Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of specific surface area of ceramic powders by gas adsorption using the BET method (ISO 18757:2003)

Relations

• Replaces: EN 725-6:1996 - Advanced technical ceramics - Methods of test for ceramic powders - Part 6: Determination of the specific surface area
• Effective Date: 22-Dec-2008

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 18757:2006
01-julij-2006
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Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of
specific surface area of ceramic powders by gas adsorption using the BET method (ISO
18757:2003)
Hochleistungskeramik - Bestimmung der spezifischen Oberfläche keramischer Pulver
durch Gasadsorption nach dem BET-Verfahren (ISO 18757:2003)
Céramiques techniques - Détermination de la surface spécifique (aire massique) des
poudres céramiques par adsorption de gaz a l'aide de la méthode BET (ISO
18757:2003)
Ta slovenski standard je istoveten z: EN ISO 18757:2005
ICS:
81.060.30
SIST EN ISO 18757:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN ISO 18757
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2005
ICS 81.060.30 Supersedes EN 725-6:1996
English Version
Fine ceramics (advanced ceramics, advanced technical
ceramics) - Determination of specific surface area of ceramic
powders by gas adsorption using the BET method (ISO
18757:2003)
Poudres céramiques - Détermination de l'aire massique Hochleistungskeramik - Bestimmung der spezifischen
(surface spécifique) par adsorption de gaz à l'aide de la Oberfläche keramischer Pulver durch Gasadsorption nach
méthode BET (ISO 18757:2003) dem BET-Verfahren (ISO 18757:2003)
This European Standard was approved by CEN on 19 September 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 18757:2005: E
worldwide for CEN national Members.

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EN ISO 18757:2005 (E)
Foreword
The text of ISO 18757:2003 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 18757:2005 by
Technical Committee CEN/TC 184 “Advanced technical ceramics” the secretariat of which is held by BSI.
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 April 2006, and conflicting national standards shall be withdrawn at the
latest by April 2006.
This document supersedes EN 725-6:1996.
CEN/TC 184 has prepared EN 725 Advanced technical ceramics — Methods of test for ceramic powders in
twelve parts as follows:
Part 1: Determination of impurities in alumina
Part 2: Determination of impurities in barium titanate
Part 3: Determination of oxygen content of non-oxides by thermal extraction
Part 4: Determination of oxygen content of non-oxides by XRF analysis
Part 5: Determination of particle size distribution
Part 6: Determination of specific surface area
Part 7: Determination of absolute density
Part 8: Determination of tapped density
Part 9: Determination of untamped bulk density
Part 10: Determination of compaction properties
Part 11: Determination of the densification on natural sintering
Part 12: Chemical analysis of zirconia
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
Endorsement notice
The text of ISO 18757:2003 has been approved by CEN as EN ISO 18757:2005 without any modifications.

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