Standard Historical Last Updated: Dec 31, 2010 Track Document
ASTM F140-98(2003)

Standard Practice for Making Reference Glass-Metal Butt Seals and Testing for Expansion Characteristics by Polarimetric Methods

Standard Practice for Making Reference Glass-Metal Butt Seals and Testing for Expansion Characteristics by Polarimetric Methods F0140-98R03 ASTM|F0140-98R03|en-US Standard Practice for Making Reference Glass-Metal Butt Seals and Testing for Expansion Characteristics by Polarimetric Methods Standard new BOS Vol. 15.02 Committee C14
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Significance and Use

The term reference as employed in this practice implies that either the glass or the metal of the reference glass-metal seal will be a standard reference material such as those supplied for other physical tests by the National Institute for Standards and Technology (NIST), or a secondary reference material whose sealing characteristics have been determined by seals to a standard reference material.5 Until standard reference materials for seals are established by the NIST, secondary reference materials may be agreed upon between manufacturer and purchaser.

Scope

1.1 This practice covers the preparation and testing of reference glass-metal butt seals of two general configurations: one applicable to determining stress in the glass and the other to determining the degree of mismatch of thermal expansion (or contraction). Tests are in accordance with Test Method F 218 (Section 1.1).

1.2 This practice applies to all glass and metal (or alloy) combinations normally sealed together in the production of electronic components. It should not be attempted with glass-metal combinations having widely divergent thermal expansion (or contraction) properties.

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Details
Book of Standards Volume: 15.02
Developed by Subcommittee: C14.04
Pages: 6
DOI: 10.1520/F0140-98R03
ICS Code: 21.140