ASTM A 228/A 228M-2007 乐器用优质弹簧钢丝的标准规范

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【英文标准名称】:Specificationsforpressure-sensitiveadhesivetapesforelectricalpurposes-Specificationsforindividualmaterials-Glassfabricwithpressure-sensitiveadhesive
【原文标准名称】:电气用压敏胶带规范.单材料规范.带压敏胶粘剂的玻璃纤维
【标准号】:BSEN60454-3-8-1998
【标准状态】:作废
【国别】:英国
【发布日期】:1998-10-15
【实施或试行日期】:1998-10-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:热试验;窄条带材;热阻;胶粘带;电化学腐蚀;纺织玻璃纤维;抗拉强度;击穿电压;厚度;附着力试验;压敏材料;耐久试验;粘结强度;固体绝缘材料;电绝缘材料;电绝缘;名称与符号;温度系数;布;分类系统;电阻;胶粘剂
【英文主题词】:
【摘要】:ThissheetofIEC60454-3containstherequirementsforpressure-sensitiveadhesivetapesmadewithglassfabric.Materialswhichconformtothisspecificationmeetestablishedlevelsofperformance.However,theselectionofamaterialbyauserforaspecificapplicationshouldbebasedontheactualrequirementsnecessaryforadequateperformanceinthatapplication,andnotbasedonthisspecificationalone.
【中国标准分类号】:K15
【国际标准分类号】:29_035_30
【页数】:10P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforMeasuringRelativeComplexPermittivityandRelativeMagneticPermeabilityofSolidMaterialsatMicrowaveFrequenciesUsingCoaxialAirLine
【原文标准名称】:使用同轴空气电缆测量微波频率下固体材料相对复合电容率和相对磁导率的标准试验方法
【标准号】:ASTMD7449/D7449M-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D09.12
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:coaxialline;dielectricconstant;lossfactor;magneticpermeability;measurement;microwave;millimetrewave;permittivity;radiofrequency;scatteringparameter;transmission/reflection
【摘要】:Designcalculationsforradiofrequency(RF),microwaveandmillimetre-wavecomponentsrequiretheknowledgeofvaluesofcomplexpermittivityandpermeabilityatoperatingfrequencies.Thistestmethodisusefulforevaluatingsmallexperimentalbatchorcontinuousproductionmaterialsusedinelectromagneticapplications.Usethismethodtodeterminecomplexpermittivityonly(innon-magneticmaterials)orbothcomplexpermittivityandpermeabilitysimultaneously.1.1Thistestmethodcoversaprocedurefordeterminingrelativecomplexpermittivity(relativedielectricconstantandloss)andrelativemagneticpermeabilityofisotropic,reciprocal(non-gyromagnetic)solidmaterials.Ifthematerialisnonmagnetic,itisacceptabletousethisproceduretomeasurepermittivityonly.1.2Thismeasurementmethodisvalidoverafrequencyrangeofapproximately1MHztoover20GHz.Theselimitsarenotexactanddependonthesizeofthespecimen,thesizeofcoaxialairlineusedasaspecimenholder,andontheapplicablefrequencyrangeofthenetworkanalyzerusedtomakemeasurements.Thepracticallowerandupperfrequenciesarelimitedbyspecimendimensionrequirements(large,thickspecimensatlowfrequenciesandsmallspecimensathighfrequencies).Foragivenairlinesize,theupperfrequencyisalsolimitedbytheonsetofhigherordermodesthatinvalidatethedominant-modetransmissionlinemodelandthelowerfrequencyislimitedbythesmallestmeasurablephaseshiftthroughaspecimen.Beinganon-resonantmethod,theselectionofanynumberofdiscretemeasurementfrequenciesinameasurementbandwouldbesuitable.Thecoaxialfixtureispreferredoverrectangularwaveguidefixtureswhenbroadbanddataaredesiredwithasinglesampleorwhenonlysmallsamplevolumesareavailable,particularlyforlowerfrequencymeasurements1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.Theequationsshownhereassumeane+jx03C9;tharmonictimeconvention.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A55
【国际标准分类号】:17_220_20
【页数】:8P.;A4
【正文语种】:英语