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中南大学学报(自然科学版)

Journal of Central South University

第31卷    第1期    总第131期    2000年2月

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文章编号:1004-0609(2000)01-0120-03
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

邢鹏飞,任存治,涂赣峰,李春材,孟    颖,张成祥

(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

Physical properties of raw materials used in producing rare earth silicide alloy by carbon thermal reduction method(Ⅰ)

——Thermophysical properties and specific resistance

XING Peng-fei, REN Cun-zhi, TU Gan-feng, LI Chun-cai, MENG Yin, ZHANG Cheng-xiang

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

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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