标准编号：ISO 8894-2:2007
中文名称：耐火材料 导热性的测定 第2部分：热线法（并联）
英文名称：Refractory materials — Determination of thermal conductivity — Part 2: Hot-wire method (parallel)
发布日期：2007-12
标准范围
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.
标准预览图
立即下载标准文件