ASTM-C554 Historical Revision Information
Standard Test Method for Crazing Resistance of Fired Glazed Ceramic Whitewares by a Thermal Shock Method

ASTM-C554 - 1993 R06 EDITION - SUPERSEDED
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Standard Test Method for Crazing Resistance of Fired Glazed Ceramic Whitewares by a Thermal Shock Method
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Scope

1.1 This test method covers the determination of the resistance to crazing of fired, glazed, ceramic whitewares when stresses residual after glost firing may cause a tendency to craze, such stresses being induced by factors other than moisture expansion.

1.2 This test is not intended to induce moisture expansion, which fact should be kept in mind if the materials to be evaluated may exhibit moisture expansion. Note 1Test Method C 424 covers a method for determining resistance to crazing induced by moisture expansion. Its use is generally confined to testing nonvitreous and semivitreous ceramic whitewares because these products may be subject to such expansion. For whitewares with negligible moisture expansion (such as vitreous and impervious ware), the thermal shock method described herein is generally to be preferred.

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. For a specific hazard statement, see Warning in .

1.3 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information only.

Significance and Use

Unless there is a proper match between the expansions of the glaze and the body, all glazed whitewares may contain residual stresses from the firing that bonded the glaze to the body. In addition, whitewares are increasingly subjected to thermal stresses in service. Hence, an important use criterion for a glazed whiteware is adequate resistance to repeated abrupt thermal changes. In most cases, the result of inadequate resistance to thermal shock is the appearance of a craze pattern in the glaze. This craze pattern is visible by inspection with oblique lighting and application of a suitable ink or dye.

This test method is applicable to vitreous whitewares that have negligible crazing as a result of moisture expansion. For nonvitreous and semivitreous bodies, refer to Test Method C 424.

Keywords

crazing resistance; fired glazed ceramic whiteware; thermal shock method; ICS Number Code 81.060.20 (Ceramic products)

To find similar documents by ASTM Volume:

15.02 (Glass; Ceramic Whitewares)

To find similar documents by classification:

81.060.20 (Ceramic products Ceramic tiles, see 91.100.23 Ceramic building products, see 91.100.25 Sanitary ceramic products, see 91.140.70)

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Document Number

ASTM-C554-93(2006)

Revision Level

1993 R06 EDITION

Status

Superseded

Modification Type

Reapproval

Publication Date

March 1, 2006

Document Type

Test Method

Page Count

2 pages

Committee Number

C21.03