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Standard Practice for Making Reference Glass-Metal Butt Seals and Testing for Expansion Characteristics by Polarimetric Methods
STANDARD published on 1.4.2008
Designation standards: ASTM F140-98(2008)
Note: WITHDRAWN
Publication date standards: 1.4.2008
SKU: NS-50159
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
expansion mismatch, glass-metal seals, Seals--electronic applications, Specimen preparation (for testing)--semiconductor materials, Thermal expansion/contraction, Butt seals, Electronic materials/applications, Glass electronic seals, Metal electronic components/devices, ICS Number Code 21.140 (Seals, glands)
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. Until standard reference materials for seals are established by the NIST, secondary reference materials may be agreed upon between manufacturer and purchaser. |
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1. 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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2. Referenced Documents | ||||||||
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