NF EN ISO 18757
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 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.
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.
Ce document décrit une méthode de détermination de la surface spécifique (aire massique) des poudres céramiques, paramètre essentiel de la qualité des produits et de propriétés attendues des céramiques fines.
- Avant-propos3
-
1Domaine d'application 4
-
2Références normatives 4
-
3Termes et définitions 4
-
4Symboles et termes abrégés 4
-
5Principe 5
-
6Mode opératoire 6
-
6.1Mode opératoire général 6
-
6.2Préparation des échantillons 6
-
6.3Conditions expérimentales 8
-
6.4Évaluation des données 10
-
7Rapport d'essai 10
- Annexe A (informative) Préparation des échantillons - Dégazage12
- Annexe B (informative) Matériaux de référence13
- Bibliographie14
COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.
Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!
Request your free, no-obligation live demo
I discover COBAZ