黄铁矿热电系数与活化温度的关系

黄铁矿热电系数的研究成果较多,但其测试的活化温度(温差条件)通常不统一,不同活化温度对热电系数的影响也不甚清楚.本文首先介绍了黄铁矿热电系数的原理,区分了导电类型、热电结构类型与热电场类型三个易混淆的概念；讨论了黄铁矿热电系数的测试方法,并对其热电系数与活化温度的关系进行了实验研究,结果显示黄铁矿热电动势绝对值总体随活化温度的升高而增大,但热电系数绝对值大致随活化温度的升高而降低；活化温度对P型黄铁矿热电系数特征的影响要比对N型黄铁矿热电系数特征的影响明显.通过对比分析,认为用BHTE-06型热电系数测量仪测试黄铁矿热电系数时,活化温度选取40℃更为合适.

The Relation between Thermoelectric Coefficient of Pyrite and Activation Temperature

There are many literatural studies about thermoelectric coefficient of pyrite,but the activation temperatures in the studies are usually various.Therefore,the effect of the activation temperature to the thermoelectric coefficient remains ambiguous.This paper introduces the theory of thermoelectric coefficient,and distinguishes the easily confused conceptions of conduction type,type of thermoelectric structure and thermoelectric field type of pyrite.The paper reviews the methods of measuring thermoelectric coefficient of pyrite,and systematically studies the correlation of the thermoelectric coefficient of pyrite and the activation temperature.The result indicates that the absolute value of thermo-electromotive force increases and the absolute value of thermoelectric coefficient decreases as the activation temperature rises,and that the activation temperature has more significant effect on the thermoelectric coefficient of P-type pyrite than on that of N-type pyrite.According to our experiments results,we conclude that the most appropriate activation temperature is 40℃ for using BHTE-06 type instrument to measure the thermoelectric coefficient of pyrite.