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【英文标准名称】:StandardPracticeforMakingReferenceGlass-MetalButtSealsandTestingforExpansionCharacteristicsbyPolarimetricMethods
【原文标准名称】:偏振法测定膨胀特性用的参考玻璃与金属对接密封材料的制作与试验
【标准号】:ASTMF140-1998(2003)
【标准状态】:现行
【国别】:
【发布日期】:1998
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:C14.04
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:金属;比较;试验;电子工程;密封件;玻璃;工艺
【英文主题词】:expansionmismatch;glass-metalseals
【摘要】:Thetermx201C;referencex201D;asemployedinthispracticeimpliesthateithertheglassorthemetalofthereferenceglass-metalsealwillbeax201C;standardreferencematerialx201D;suchasthosesuppliedforotherphysicaltestsbytheNationalInstituteforStandardsandTechnology(NIST),orasecondaryreferencematerialwhosesealingcharacteristicshavebeendeterminedbysealstoastandardreferencematerial.5UntilstandardreferencematerialsforsealsareestablishedbytheNIST,secondaryreferencematerialsmaybeagreeduponbetweenmanufacturerandpurchaser.1.1Thispracticecoversthepreparationandtestingofreferenceglass-metalbuttsealsoftwogeneralconfigurations:oneapplicabletodeterminingstressintheglassandtheothertodeterminingthedegreeofmismatchofthermalexpansion(orcontraction).TestsareinaccordancewithTestMethodF218(Section1.1).1.2Thispracticeappliestoallglassandmetal(oralloy)combinationsnormallysealedtogetherintheproductionofelectroniccomponents.Itshouldnotbeattemptedwithglass-metalcombinationshavingwidelydivergentthermalexpansion(orcontraction)properties.
【中国标准分类号】:J22
【国际标准分类号】:21_140
【页数】:6P.;A4
【正文语种】: