標(biāo)準(zhǔn)號：BS EN 993-15-2005
中文標(biāo)準(zhǔn)名稱：致密成形耐火制品的試驗(yàn)方法.熱線絲(并聯(lián))法測定熱導(dǎo)率
英文標(biāo)準(zhǔn)名稱：Methods of test for dense shaped refractory products - Part 15: Determination of thermal conductivity by the hot wire (parallel) method
標(biāo)準(zhǔn)類型：Q40
發(fā)布日期：2005/11/21 12:00:00
實(shí)施日期：2005/11/21 12:00:00
中國標(biāo)準(zhǔn)分類號：Q40
國際標(biāo)準(zhǔn)分類號：81.080
適用范圍：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.