(东北大学 材料与冶金学院，沈阳110006)
摘 要: 用非稳态热线法测定了碳热法生产稀土硅化物合金原料的导热系数，用激光脉冲法测定了稀土硅化物合金的导热系数、热扩散系数和比热容。在288～1573K内，原料的导热系数与温度的关系可表示为： λ＝2.56×10-2+7.8×10-4T(W·m-1·K-1)；在288～1273K内, 稀土合金的导热系数与温度的关系可表示为： λ＝14.30-7.4×10-3T(W·m-1·K-1)。还测定了原料中两种稀土配碳团块在773 K和1273K焙烧后的电阻率。
关键字: 碳热法；稀土硅化物合金；热物性参数；电阻率
（School of Materials and Metallurgy, Northeastern University, Shenyang 110006, P.R.China）
Abstract:The thermal conductivity of raw materials, used in the process of producing rare-earth silicide alloy by carbon thermal reduction method, was measured from 288K to 1573K by unsteady state hot-wire method. The relation between thermal conductivity (λ) of raw materials and temperature (T) can be written as λ＝2.56×10-2+7.8×10-4T. The thermal conductivity, the thermal diffusivity, and the specific heat capacity of the rare-earth silicide alloy were also measured from 288K to 1273K. The dependence of the thermal conductivity (λ) of the alloy on temperature (T) follows a linear equation: λ＝14.30-7.4×10-3T. The specific resistance was also determined for two kinds of rare earth-carbon compact roasted at 773 K and 1273 K respectively.
Key words: carbon thermal reduction; rare earth silicide alloys; thermophysical properties; specific resistance
