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OALib Journal期刊
ISSN: 2333-9721
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碳化硅材料热导率计算研究进展
DOI: 10.14062/j.issn.0454-5648.2015.03.03
Abstract:
从声子散射机制出发，介绍了SiC热导率的温度特性和微观导热机理。综述了SiC单晶热导率的2种主要计算方法。Boltzmann-弛豫时间近似(RTA)适用于各个温度段的热导率计算，而分子动力学方法更适用于高温热导率计算。分子动力学方法相比于Boltzmann-RTA方法的优点在于它可以考虑所有高次项的非谐作用。介绍了3种SiC陶瓷热导率近似计算模型，包括界面热阻模型、Debye-Callaway模型及多相系统热导率模型。下一步研究的主要方向仍然是优化计算模型及减少拟合参数。
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