碳热法生产稀土硅化物合金的物料性质(Ⅰ)——热物性参数与电阻率

来源期刊：中国有色金属学报2000年第1期

论文作者：邢鹏飞 任存治 涂赣峰 李春材 孟颖 张成祥

文章页码：120 - 122

关键词：碳热法；稀土硅化物合金；热物性参数；电阻率

Key words：carbon thermal reduction; rare earth silicide alloys; thermophysical properties; specific resistance

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。

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.