原文标准名称：耐火材料.测定导热系数.第2部分:热线法(并联)

英文标准名称：Refractory materials - Determination of thermal conductivity - Part 2: Hot-wire method (parallel)

中文主题词：定义;测定;动态测试;电的;炉;热学;热线;隔热;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;耐火制品;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：

标准号：ISO 8894-2-2007

标准状态：现行

国别：国际

发布日期：2007-12-01

实施或试行日期：

发布单位：国际标准化组织(ISO)

起草单位：ISO/TC 33

标准类型：

标准水平：

中国标准分类号：Q40

国际标准分类号：81_080

页数：0

正文语种：英语

内容简介

This part of ISO 8894 describes a hot-wire (parallel) method for the determination of the thermal conductivityof refractory products and materials. It is applicable to dense and insulating shaped products and to powderedor granular materials (see 6.2), for thermal conductivities of less than 25 W/m·K. The limits are imposed by thethermal diffusivity of the test material and therefore by the dimensions of the test pieces; higher thermalconductivities can be measured if larger pieces are used. Electrically conducting materials cannot bemeasured.NOTE 1 The thermal conductivity of products with a hydraulic or chemical bond can be affected by the appreciableamount of water that is retained after hardening or setting and is released on firing. These materials can therefore requirepretreatment. The nature and extent of such pretreatment, and the period for which the test piece is held at themeasurement temperature as a preliminary to carrying out the test, are details that are outside the scope of this part ofISO 8894 and are agreed between the parties concerned.NOTE 2 In general, it is difficult to make measurements on anisotropic materials and the use of this method for suchmaterials is also agreed between the parties concerned.