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Significance and Use
Measurement of thermal expansion is useful for predicting stress within joined materials or single materials under conditions of changing or nonuniform temperature. It can also serve as an indicator of phase composition or changes in structure.
1.1 This test method covers the determination of the linear thermal expansion of premelted frit (porcelain enamel and glaze) and ceramic whiteware products by the thermal dilatometer method. This test method is applicable to apparatus meeting the reproducibility and accuracy requirements of this test method, which are to produce percent linear expansion accuracy of ±3 % or better and coefficient of linear expansion accuracy of ±5 % or better.
1.2 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.
E220 Test Method for Calibration of Thermocouples By Comparison Techniques
E228 Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer
E230 Specification and Temperature-Electromotive Force (EMF) Tables for Standardized Thermocouples
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ICS Number Code 25.220.50 (Enamels)
ASTM C372-94(2012), Standard Test Method for Linear Thermal Expansion of Porcelain Enamel and Glaze Frits and Fired Ceramic Whiteware Products by the Dilatometer Method , ASTM International, West Conshohocken, PA, 2012, www.astm.orgBack to Top