【摘要】 <正> 测定非金属物质导热系数(λ)的方法中,以精度高、样品易制备的平板稳态绝对法应用最广,已被许多国家定为标准测试方法.但是,一般平板热导仪的试验温度较低(1000℃以下)、样品较大(φ≥10cm).为此,我们继研制900℃中平板热导仪后,又对该方法作了进一步研究和改进,研制了试验温度(试样平均温度)为1200℃,试样φ为更多还原

【Abstract】 Research works were carried out concerning several problems which are very important for thermal conductivity measurement by thin plate method. These problems include how to minimize the errors of measurement, to decrease the size of the specimen and to extend the testing temperature range. The thermal conductivity of standard specimen --a-Al2O3, as well as other matters in solid and liquid states were determined by the apparatus. Data obtained from the standard specimen was compared with recommended values in the literature and found to be in good agreement. The maximal relative errors of thermal conductivity measurement amount to - 6.8%~ +4.9%.更多还原