1.1 本试验方法涵盖了非碳质介电耐火材料导热系数的测定。 1.2 适用的耐火材料包括耐火砖、耐火浇注料、塑料耐火材料、捣打混合物、粉末材料、颗粒材料和耐火纤维。 1.3 导热系数k值可以从室温到1500°C[2732°F]，或耐火材料的最大使用极限，或到耐火材料不再具有介电性的温度来确定。 1.4 本试验方法适用于k值小于15 W/m·k[100 Btu·in./h·ft的耐火材料 2. ·°F]。 1.5 一般来说，很难对各向异性材料，特别是含有纤维的材料进行精确测量，对此类材料使用这种测试方法应由有关各方商定。 1.6 单位-- 以国际单位制或英寸-磅单位表示的值应单独视为标准值。每个系统中所述的值可能不是完全等效的；因此，每个系统都应独立使用。将两个系统的值结合起来可能会导致不符合标准。 1.7 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 5.1 在一个或多个温度下确定的k值可用于按产品导热系数的相对顺序对产品进行排名。 5.2 可以使用在宽温度范围内获得的k值来计算单组分和多组分衬里的热流、界面温度和冷面温度的估计值。 5.3 确定的k值是“在温度下”的测量值，而不是“平均温度”测量值。因此，可以测量宽范围的温度，并且结果不是在水冷量热计固有的大热梯度上平均的。 5.4 测量的k值是k的组合- 样品宽度和厚度的值，因为来自热线的热流在这两个方向上。水冷量热计通过样品厚度在一个方向上测量k值。 5.5 在报告k值时，应指定所使用的测试方法，因为所获得的结果可能因所用测试方法的类型而异。通过热线法获得的数据通常比试验方法中给出的水热量计法获得的数字高10%至30% C201 .

1.1 This test method covers the determination of thermal conductivity of non-carbonacious, dielectric refractories. 1.2 Applicable refractories include refractory brick, refractory castables, plastic refractories, ramming mixes, powdered materials, granular materials, and refractory fibers. 1.3 Thermal conductivity k-values can be determined from room temperature to 1500 °C [2732 °F], or the maximum service limit of the refractory, or to the temperature at which the refractory is no longer dielectric. 1.4 This test method is applicable to refractories with k-values less than 15 W/m·K [100 Btu·in./h·ft 2 ·°F]. 1.5 In general it is difficult to make accurate measurements of anisotropic materials, particularly those containing fibers, and the use of this test method for such materials should be agreed between the parties concerned. 1.6 Units— The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The k-values determined at one or more temperatures can be used for ranking products in relative order of their thermal conductivities. 5.2 Estimates of heat flow, interface temperatures, and cold face temperatures of single and multi-component linings can be calculated using k-values obtained over a wide temperature range. 5.3 The k-values determined are “at temperature” measurements rather than “mean temperature” measurements. Thus, a wide range of temperatures can be measured, and the results are not averaged over the large thermal gradient inherent in water-cooled calorimeters. 5.4 The k-values measured are the combination of the k-values for the width and thickness of the sample, as the heat flow from the hot wire is in both of those directions. The water-cooled calorimeter measures k-value in one direction, through the sample thickness. 5.5 The test method used should be specified when reporting k-values, as the results obtained may vary with the type of test method that is used. Data obtained by the hot wire method are typically 10 % to 30 % higher than data obtained by the water calorimeter method given in Test Method C201 .