【英文标准名称】:Refractorymaterials-Determinationofthermalconductivity-Part2:Hot-wiremethod(parallel)
【原文标准名称】:耐火材料.导热性测定.第2部分:热线法(并联)
【标准号】:ISO8894-2-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-12
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC33
【标准类型】:()
【标准水平】:()
【中文主题词】:定义;测定;动态测试;电的;炉;热学;热线;绝缘;材料;材料测试;数学计算;测量技术;方法;并联;可折射的;耐熔的;耐火材料;耐熔制品;样品;温度测量;试样;测试;试验;热的;导热性;热试验;金属线
【英文主题词】:
【摘要】:ThispartofISO8894describesahot-wire(parallel)methodforthedeterminationofthethermalconductivityofrefractoryproductsandmaterials.Itisapplicabletodenseandinsulatingshapedproductsandtopowderedorgranularmaterials(see6.2),forthermalconductivitiesoflessthan25W/m·K.Thelimitsareimposedbythethermaldiffusivityofthetestmaterialandthereforebythedimensionsofthetestpieces;higherthermalconductivitiescanbemeasurediflargerpiecesareused.Electricallyconductingmaterialscannotbemeasured.NOTE1Thethermalconductivityofproductswithahydraulicorchemicalbondcanbeaffectedbytheappreciableamountofwaterthatisretainedafterhardeningorsettingandisreleasedonfiring.Thesematerialscanthereforerequirepretreatment.Thenatureandextentofsuchpretreatment,andtheperiodforwhichthetestpieceisheldatthemeasurementtemperatureasapreliminarytocarryingoutthetest,aredetailsthatareoutsidethescopeofthispartofISO8894andareagreedbetweenthepartiesconcerned.NOTE2Ingeneral,itisdifficulttomakemeasurementsonanisotropicmaterialsandtheuseofthismethodforsuchmaterialsisalsoagreedbetweenthepartiesconcerned.
【中国标准分类号】:Q40
【国际标准分类号】:81_080
【页数】:13P;A4
【正文语种】:英语