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  • ASTM
    C1274-12 Standard Test Method for Advanced Ceramic Specific Surface Area by Physical Adsorption
    Edition: 2012
    $103.58
    Unlimited Users per year

Description of ASTM-C1274 2012

ASTM C1274 - 12

Standard Test Method for Advanced Ceramic Specific Surface Area by Physical Adsorption

Active Standard ASTM C1274 | Developed by Subcommittee: C28.03

Book of Standards Volume: 15.01




ASTM C1274

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.

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 and based on IUPAC Recommendations (1984 and 1994) ( 2 ) and ( 3 ) . This test method specifies general procedures that are applicable to many commercial physical adsorption instruments. This test method provides specific sample outgassing procedures for selected common ceramic materials, including: amorphous and crystalline silicas, TiO 2 , kaolin, silicon nitride, silicon carbide, zirconium oxide, etc. The multipoint BET ( 1 ) equation along with the single point approximation of the BET equation are the basis for all calculations. This test method is appropriate for measuring surface areas of advanced ceramic powders down to at least 0.05 m 2 (if in addition to nitrogen, krypton at 77.35 K is utilized as an adsorptive).

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 m 2 /g, and, as a convention, many instruments (as well as certificates of reference materials) report surface area as m 2 g -1 , instead of using SI units (m 2 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.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D1993 Test Method for Precipitated Silica-Surface Area by Multipoint BET Nitrogen Adsorption

E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

ISO Standards


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 Code

ICS Number Code 81.060.99 (Other standards related to ceramics)


DOI: 10.1520/C1274-12

ASTM International is a member of CrossRef.

ASTM C1274

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