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Standard Test Method for Advanced Ceramic Specific Surface Area by Physical Adsorption
Automaticky přeložený název:
Standardní zkušební metoda pro pokročilé keramické specifický povrch prostoru tím, že fyzikální adsorpce
NORMA vydána dne 1.8.2012
Označení normy: ASTM C1274-12
Poznámka: NEPLATNÁ
Datum vydání normy: 1.8.2012
Kód zboží: NS-10409
Počet stran: 12
Přibližná hmotnost: 36 g (0.08 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
advanced ceramics, BET surface area, ceramics, krypton adsorption, multipoint surface area, nitrogen adsorption, outgassing, physical adsorption, single point surface area, specific surface area, surface area, ICS Number Code 81.060.99 (Other standards related to ceramics)
Significance and Use | ||||||
5.1 Advanced ceramic powders and porous ceramic bodies often have a very fine particulate morphology and structure that are marked by high surface-to-volume (S-V) ratios. These ceramics with high S-V ratios commonly exhibit enhanced chemical reactivity and lower sintering temperatures. Results of many intermediate and final ceramic processing steps are controlled by, or related to, the specific surface area of the advanced ceramic. The functionality of ceramic adsorbents, separation filters and membranes, catalysts, chromatographic carriers, coatings, and pigments often depends on the amount and distribution of the porosity and its resulting effect on the specific surface area. 5.2 This test method determines the specific surface area of advanced ceramic powders and porous bodies. Both suppliers and users of advanced ceramics can use knowledge of the surface area of these ceramics for material development and comparison, product characterization, design data, quality control, and engineering/ production specifications. |
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1. Scope | ||||||
1.1 This test method covers the determination of the surface area of advanced ceramic materials (in a solid form) based on multilayer physisorption of gas in accordance with the method of Brunauer, Emmett, and Teller (BET) 1.2 This test method does not include all existing procedures appropriate for outgassing of advanced ceramic materials. However, it provides a comprehensive summary of procedures recommended in the literature for selected types of ceramic materials. The investigator shall determine the appropriateness of listed procedures. 1.3 The values stated in SI units are to be regarded as standard. State all numerical values in terms of SI units unless specific instrumentation software reports surface area using alternate units. In this case, provide both reported and equivalent SI units in the final written report. It is commonly accepted and customary (in physical adsorption and related fields) to report the (specific) surface area of solids as m2/g, and, as a convention, many instruments (as well as certificates of reference materials) report surface area as m2 g-1, instead of using SI units (m2 kg-1). 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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2. Referenced Documents | ||||||
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