BS EN 993-15-2005 致密成形耐火制品的试验方法.热线丝(并联)法测定热导率

标准号：BS EN 993-15-2005
中文标准名称：致密成形耐火制品的试验方法.热线丝(并联)法测定热导率
英文标准名称：Methods of test for dense shaped refractory products - Part 15: Determination of thermal conductivity by the hot wire (parallel) method
标准类型：Q40
发布日期：2005/11/21 12:00:00
实施日期：2005/11/21 12:00:00
中国标准分类号：Q40
国际标准分类号：81.080
适用范围：This European Standard describes a hot-wire (parallel) method for the determination of thermal conductivity ofrefractory products and materials. It is applicable to dense and insulating shaped products and to powdered orgranular 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 may therefore requirepre-treatment; the nature and extent of such pre-treatment 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 standardand should be 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 should also be agreed between the parties concerned.