ASTM-F144:2015 Edition

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F144-80(2015) Standard Practice for Making Reference Glass-Metal Sandwich Seal and Testing for Expansion Characteristics by Polarimetric Methods

Published By	Publication Date	Number of Pages
ASTM	2015	6

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Category: ASTM

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Description

ASTM F144-80-Reapproved2015

Historical Standard: Standard Practice for Making Reference Glass-Metal Sandwich Seal and Testing for Expansion Characteristics by Polarimetric Methods

ASTM F144

Scope

1.1 This practice covers the preparation and testing of a reference glass-metal sandwich seal for determining stress in the glass or for determining the degree of thermal expansion (or contraction) mismatch between the glass and metal. Tests are in accordance with Test Method F218 (Section 2).

1.2 This practice applies to all glass and metal (or alloy) combinations normally sealed together in the production of electronic components.

1.3 The practical limit of the test in deriving mismatch is approximately 300 ppm, above which the glass is likely to fracture.

1.4 This standard does not purport to address all of the safety problems, 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.

Keywords

expansion mismatch; glass-metal seals ;

ICS Code

ICS Number Code 21.140 (Seals, glands)

DOI: 10.1520/F0144-80R15

Additional information

Standard Title	F144-80(2015) Standard Practice for Making Reference Glass-Metal Sandwich Seal and Testing for Expansion Characteristics by Polarimetric Methods
Published Code	ASTM
Publication Date	2015
Pages Count	6