(東北大學(xué) 材料與冶金學(xué)院，沈陽(yáng)110006)
摘 要: 用非穩(wěn)態(tài)熱線法測(cè)定了碳熱法生產(chǎn)稀土硅化物合金原料的導(dǎo)熱系數(shù)，用激光脈沖法測(cè)定了稀土硅化物合金的導(dǎo)熱系數(shù)、熱擴(kuò)散系數(shù)和比熱容。在288～1573K內(nèi)，原料的導(dǎo)熱系數(shù)與溫度的關(guān)系可表示為： λ＝2.56×10-2+7.8×10-4T(W·m-1·K-1)；在288～1273K內(nèi), 稀土合金的導(dǎo)熱系數(shù)與溫度的關(guān)系可表示為： λ＝14.30-7.4×10-3T(W·m-1·K-1)。還測(cè)定了原料中兩種稀土配碳團(tuán)塊在773 K和1273K焙燒后的電阻率。
關(guān)鍵字: 碳熱法；稀土硅化物合金；熱物性參數(shù)；電阻率
（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
