Influence of microstructure and impurities on thermal conductivity of aluminum nitride ceramics

被引：0

作者：

Ruckmich, S. ^{[1
]}

机构：

[1] Infineon Technol. SC 300 GmbH Co., Konigsbrücker Str. 180, 0-01099 Dresden, Germany

来源：

Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques | 2001年 / 92卷 / 07期

关键词：

Aluminum nitride - Annealing - Chemical modification - Composition effects - Impurities - Mathematical models - Microstructure - Phase composition - Sintering - Thermal conductivity;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The microstructure of AIN ceramics, which were pressureless sintered with CaO and CaF2 as additives, was modified via an annealing process. The thermal conductivity of these samples was measured and correlated with the microstructure changes. The influence of the microstructural elements, especially content and distribution of secondary phases, is described and quantitatively related to mixture models from literature for a full understanding of the relationships between microstructure, impurity content and thermal conductivity. The main result of the investigation is that the microstructural influence on thermal conductivity is limited to at maximum 41 W/m &middot K. The increase of the intrinsic thermal conductivity, due to loss of impurities especially oxygen during the beginning of the annealing process, is the main effect influencing thermal conductivity of sintered samples.

引用

页码：839 / 844