SIST EN 725-3:2007

Advanced technical ceramics - Methods of test for ceramic powders - Part 3: Determination of the oxygen content of non-oxides by thermal extraction with a carrier gas

This part of EN 725 describes a method for the determination of the oxygen content of non-oxide powders used for advanced technical ceramics, using an inert carrier gas thermal extraction method. The method described is suitable for oxygen contents of less than 3 %.
NOTE   An indication of the limits of determination is usually given by the manufacturers of the gas analysis apparatus used.  However, for a specific measurement procedure, such limits can be determined by experiments conducted by the user.

Hochleistungskeramik - Prüfverfahren für keramische Pulver - Teil 3: Bestimmung des Sauerstoffgehaltes in Nichtoxid-Pulvern mittels Trägergasheißextraktion

Dieser Teil von EN 725 beschreibt ein Verfahren zur Bestimmung des Sauerstoffgehaltes mittels Trägergasheißextraktion in Nichtoxidpulvern, die für Technische Keramik verwendet werden. Das Verfahren ist anwendbar für Sauerstoffgehalte < 3 %.
ANMERKUNG   Die Grenzwerte für die Bestimmung sind von den Geräteherstellern vorgegeben. Für spezielle Messverfahren müssen sie durch eigene Versuche bestimmt werden

Céramiques techniques avancées - Méthodes d'essais pour poudres céramiques - Partie 3: Détermination de la teneur en oxygene de poudres non-oxydes par extraction a chaud sous gaz porteur

La présente partie de l’EN 725 décrit une méthode de détermination de la teneur en oxygène de poudres non-oxydes utilisées dans les céramiques techniques avancées, par extraction à chaud sous gaz porteur inerte. La méthode présentée est applicable aux teneurs en oxygène inférieures à 3 %.
NOTE   Généralement, les fabricants de l’appareil d’analyse du gaz utilisé indiquent les limites de la détermination.  Cependant, pour un mode opératoire de mesure particulier, ces limites peuvent être déterminées au cours des expériences conduites par l’utilisateur.

Sodobna tehnična keramika - Preskusne metode za keramične praške - 3. del: Določevanje kisika v neoksidnih praških s toplotno ekstrakcijo z nosilnim plinom

General Information

• Status: Published
• Publication Date: 24-Apr-2007
• ICS: 81.060.30 - Advanced ceramics
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 20-Apr-2007
• Due Date: 25-Jun-2007
• Completion Date: 25-Apr-2007
• Mandate: M/BC/CEN/90/4 - Request concerning the realisation of a standardization programme in the field of advanced technical ceramics
• Ref Project: EN 725-3:2007 - Advanced technical ceramics - Methods of test for ceramic powders - Part 3: Determination of the oxygen content of non-oxides by thermal extraction with a carrier gas

Relations

• Replaces: SIST EN 725-3:2000 - Advanced technical ceramics - Methods of test for ceramic powders - Part 3: Determination of the oxygen content of non-oxides by thermal extraction with a carrier gas
• Effective Date: 01-May-2007

Overview

SIST EN 725-3:2007 is a European standard developed by CEN focusing on advanced technical ceramics. It specifies a test method for determining the oxygen content in non-oxide ceramic powders using a thermal extraction technique with an inert carrier gas. This standard applies to powders with oxygen content of less than 3%, providing a reliable and precise approach for quality control and material characterization in ceramics manufacturing.

The method involves heating the non-oxide powder in a graphite crucible to convert oxygen present into gaseous oxides, which are subsequently measured using various gas analysis techniques. SIST EN 725-3:2007 ensures consistent results necessary for research, development, and industrial applications of non-oxide ceramic materials.

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Key Topics

• Scope and Applicability
  Suitable for oxygen content determination in non-oxide ceramic powders used in advanced technical ceramics. Optimal for oxygen content below 3%.

• Principle of the Method
  Heating the powder sample in a graphite crucible at high temperature with an inert carrier gas (e.g., nitrogen, argon, helium). Oxygen converts into CO or CO₂, which are quantified.

• Apparatus Requirements

  • Graphite crucible and furnace capable of up to 2500 °C
  • Optional tin or nickel capsules and nickel wire baskets for certain powders
  • Gas analysis systems such as volumetric, chromatography, thermal conductivity, coulometric, infrared absorption, or gravimetry.

• Calibration and Validation
  Calibration with certified reference materials or calibration gases ensures accuracy. Blank determinations account for background gas evolution.

• Sample Preparation and Testing Procedure
  Detailed guidance on sample size, capsule usage, and test temperature selection. Repeated measurements improve reliability.

• Reporting Standards
  Test reports conform to EN ISO/IEC 17025 requirements, including detailed documentation of conditions, equipment, sample data, calibration, results, and any deviations.

• Guidance on Test Conditions
  Annex A provides recommendations on optimizing parameters such as sample amount, temperature, and gas flow through preliminary testing.

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Applications

SIST EN 725-3:2007 serves as an essential standard for industries and laboratories involved with:

• Advanced technical ceramics production
  Ensuring purity and consistency of ceramic powders by monitoring oxygen levels.

• Material research and development
  Characterization of non-oxide powders including carbides, nitrides, and borides where oxygen contamination affects material properties.

• Quality control in ceramic manufacturing
  Providing standardized testing procedures to meet product specifications and customer requirements.

• Calibration and verification of gas analysis equipment
  Establishing validation protocols for oxygen determination instrumentation.

By providing a standardized and validated measurement method, the standard supports the development of high-performance ceramics used in electronics, aerospace, automotive, and biomedical applications.

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Related Standards

SIST EN 725-3:2007 is part of the EN 725 series addressing test methods for ceramic powders. Related parts include:

• EN 725-1: Determination of impurities in alumina powders
• EN 725-2: Determination of impurities in barium titanate powders
• EN 725-4: Oxygen content determination in aluminium nitride by XRF analysis
• EN 725-5: Particle size distribution of ceramic powders
• EN 725-8 & EN 725-9: Bulk density measurements
• EN ISO 18757 & EN ISO 18753: Replacement standards for specific surface area and density determination (superseding parts 6 and 7)

Compliance with SIST EN 725-3:2007 complements these standards, enabling comprehensive assessment and quality assurance of ceramic powder materials.

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Keywords: SIST EN 725-3:2007, advanced technical ceramics, oxygen content determination, non-oxide ceramic powders, thermal extraction, carrier gas method, gas analysis, ceramic powders testing, oxygen measurement ceramics, CEN standards, quality control ceramics, ceramic powder characterization.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2007
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SIST EN 725-3:2000
6RGREQDWHKQLþQDNHUDPLND3UHVNXVQHPHWRGH]DNHUDPLþQHSUDãNHGHO
'RORþHYDQMHNLVLNDYQHRNVLGQLKSUDãNLKVWRSORWQRHNVWUDNFLMR]QRVLOQLPSOLQRP
Advanced technical ceramics - Methods of test for ceramic powders - Part 3:
Determination of the oxygen content of non-oxides by thermal extraction with a carrier
gas
Hochleistungskeramik - Prüfverfahren für keramische Pulver - Teil 3: Bestimmung des
Sauerstoffgehaltes in Nichtoxid-Pulvern mittels Trägergasheißextraktion
Céramiques techniques avancées - Méthodes d'essais pour poudres céramiques - Partie
3: Détermination de la teneur en oxygene de poudres non-oxydes par extraction a chaud
sous gaz porteur
Ta slovenski standard je istoveten z: EN 725-3:2007
ICS:
81.060.30 Sodobna keramika Advanced ceramics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 725-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2007
ICS 81.060.30 Supersedes EN 725-3:1994
English Version
Advanced technical ceramics - Methods of test for ceramic
powders - Part 3: Determination of the oxygen content of non-
oxides by thermal extraction with a carrier gas
Céramiques techniques avancées - Méthodes d'essais Hochleistungskeramik - Prüfverfahren für keramische
pour poudres céramiques - Partie 3: Détermination de la Pulver - Teil 3: Bestimmung des Sauerstoffgehaltes in
teneur en oxygène de poudres non-oxydes par extraction à Nichtoxid-Pulvern mittels Trägergasheißextraktion
chaud sous gaz porteur
This European Standard was approved by CEN on 2 December 2006.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, 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
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 725-3:2007: E
worldwide for CEN national Members.

Contents Page
Foreword.3
1 Scope .4
2 Normative references .4
3 Principle.4
4 Apparatus .4
5 Sample preparation .5
6 Calibration .5
7 Blank determination .5
8 Procedure .5
9 Test report .6
Annex A (informative) Guidance in the selection of test conditions .7

Foreword
This document (EN 725-3:2007) has been prepared 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 July 2007, and conflicting national standards shall be withdrawn at the
latest by July 2007.
This document supersedes EN 725-3:1994.
EN 725 Advanced technical ceramics — Methods of test for ceramic powders was prepared in Parts as
follows:
Part 1: Determination of impurities in alumina
Part 2: Determination of impurities in barium titanate
Part 3: Determination of the oxygen content of non-oxides by thermal extraction with a carrier gas
Part 4: Determination of oxygen content in aluminium nitride by XRF analysis
Part 5: Determination of particle size distribution
Part 6: Determination of the specific surface area [withdrawn]
Part 7: Determination of the absolute density [withdrawn]
Part 8: Determination of tapped bulk density
Part 9: Determination of un-tapped bulk density
Part 10: Determination of compaction properties
Part 11: Determination of densification on natural sintering
Part 12: Chemical analysis of zirconia
Parts 6 and 7 of the series were superseded in 2005 by EN ISO 18757 and EN ISO 18753 respectively.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and United Kingdom.
1 Scope
This part of EN 725 describes a method for the determination of the oxygen content of non-oxide powders
used for advanced technical ceramics, u
...