Thermal Conductivity of Alumina Measured with Three Techniques
Thermal Conductivity of Alumina Measured with Three Techniques
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采用三种技术测量氧化铝的导热率
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
M. Ferber
中科院分区：
文献类型：
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作者：
J. Hemrick;C. W. Kistler;A. Wereszczak;M. Ferber
比较了三种常用的ASTM测定耐火陶瓷导热系数的方法(量热法、热线法和激光闪光法)，使用了一种常见的块状材料，其微观结构足以满足所有三种分析方法的要求。实验测量是在20-1200°C的细晶氧化铝上进行的，每种技术都有94%的纯氧化铝。热线法和激光闪光法的结果是相似的，并与理论值和文献值一致。量热法的测定值比其他两种方法的测定值低，在较低温度下的偏差大于较高温度下的偏差。
Three common ASTM methods (calorimetry, hot-wire, and laser-flash) for determining the thermal conductivity of refractory ceramics were compared using a commonly available bulk material having a microstructure sufficient for all three methods of analysis. Experimental measurements were made between 20–1200°C on a fine-grained, 94 % pure aluminum oxide using each technique. Results from the hot-wire and laser-flash methods were found to be similar and in line with theoretical and literature values. Values obtained by the calorimetry method were found to be lower than those of the other two methods, with a greater deviation at lower temperatures than at higher temperatures.