BS 7034-3-1988 玻璃粘度和测定粘度固定点.第3部分:采用纤维拉伸粘度计对粘度的测定方法

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【英文标准名称】:Viscosityandviscometricfixedpointsofglass-Methodforthedeterminationofviscositybyfibreelongationviscometer
【原文标准名称】:玻璃粘度和测定粘度固定点.第3部分:采用纤维拉伸粘度计对粘度的测定方法
【标准号】:BS7034-3-1988
【标准状态】:现行
【国别】:英国
【发布日期】:1989-01-31
【实施或试行日期】:1989-01-31
【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】:粘度;精密度;玻璃纤维;时间;纤维;试样制备;动力粘度;粘度计;粘度测量;荷载;温度;玻璃;校正;方程;延伸;试验设备;试验条件
【英文主题词】:Fibreelongationmethods;Glass;Instruments;Measurement;Samples;Testspecimens;Testing;Tests;Velocity;Viscosity;Viscositymeasurement
【摘要】:ThispartofISO7884specifiesamethodofdeterminingthedynamicviscosityofglassbymeasuringtheelongationofaglassfibreunderadefineduniaxialstress.Inaddition,theviscosity-temperaturerelationshipandthedependenceoftheviscosityonthethermalhistorycanbedetermined.NOTE—Usingthismethod,allpartsofthetestedmaterialaresubjecttothesamemechanicalstresswhentheshapeofthefibreiscorrect,theglassishomogeneousandisotropic,andtheinfluenceofgravityonthefibreitselfcanbeneglected.Thedeformationisapureelongationinsteadofasimpleshear.Withoutmajoruncertainty,thedetermi-nationoftheshearviscositybyanelongationexperimentispossibleonlywhenthematerialbehaveslikeaNewtonianfluid.Theknowledgeofequilibriumviscositiesinthelow-tempera-turerangeisusefulforfittingsuitableviscosity-temperatureformulaeoverthewholerangeofglassviscositiesandforamoredetailedsurveyonthermalhistoryinfluencesthancanbederivedfromfixed-pointmethodsalone.note:*1dPa·s=1dN·s/m
【中国标准分类号】:Q30
【国际标准分类号】:81_040_10
【页数】:12P.;A4
【正文语种】:英语