Thermal conductivity of micro hot-pressed AlN ceramics fabricated using a conventional MoSi2 heating element furnace

Chih Peng Lin, Chih Hung Chu, Shaw Bing Wen, Yun-Hwei Shen

研究成果: Article

1 引文 (Scopus)

摘要

AlN samples doped with sub-micron Y2O3 and CaO powders as sintering additives obtained using the micro hot-pressed (MHPed) sintering method in a MoSi2 heating element furnace were investigated. The minor amounts of secondary phases were identified as A1 5Y3O12, CaYAl3O7, and CaAl4O7, which are related to the low sintering temperature as well as the removal of oxygen-related defects in the system. Relative densities of over 96% of the theoretical value were obtained after sintering at 1600°C for 8 h, indicating that an adequate amount of additives and the use of the micro hot-pressed (MHPed) sintering process help improve the densification and thermal conductivity of AlN ceramics. The high thermal conductivity of 130 Wm-1'K-1 was attributed to the purification of the AlN lattice, the elimination of some secondary phases, and the grain boundary phase distribution.

原文English
頁(從 - 到)525-529
頁數5
期刊Journal of Ceramic Processing Research
12
發行號5
出版狀態Published - 2011 十二月 19

指紋

Electric heating elements
Thermal conductivity
Furnaces
Sintering
Densification
Powders
Purification
Grain boundaries
Oxygen
Defects

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

引用此文

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abstract = "AlN samples doped with sub-micron Y2O3 and CaO powders as sintering additives obtained using the micro hot-pressed (MHPed) sintering method in a MoSi2 heating element furnace were investigated. The minor amounts of secondary phases were identified as A1 5Y3O12, CaYAl3O7, and CaAl4O7, which are related to the low sintering temperature as well as the removal of oxygen-related defects in the system. Relative densities of over 96{\%} of the theoretical value were obtained after sintering at 1600°C for 8 h, indicating that an adequate amount of additives and the use of the micro hot-pressed (MHPed) sintering process help improve the densification and thermal conductivity of AlN ceramics. The high thermal conductivity of 130 Wm-1'K-1 was attributed to the purification of the AlN lattice, the elimination of some secondary phases, and the grain boundary phase distribution.",
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Thermal conductivity of micro hot-pressed AlN ceramics fabricated using a conventional MoSi2 heating element furnace. / Lin, Chih Peng; Chu, Chih Hung; Wen, Shaw Bing; Shen, Yun-Hwei.

於: Journal of Ceramic Processing Research, 卷 12, 編號 5, 19.12.2011, p. 525-529.

研究成果: Article

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AU - Lin, Chih Peng

AU - Chu, Chih Hung

AU - Wen, Shaw Bing

AU - Shen, Yun-Hwei

PY - 2011/12/19

Y1 - 2011/12/19

N2 - AlN samples doped with sub-micron Y2O3 and CaO powders as sintering additives obtained using the micro hot-pressed (MHPed) sintering method in a MoSi2 heating element furnace were investigated. The minor amounts of secondary phases were identified as A1 5Y3O12, CaYAl3O7, and CaAl4O7, which are related to the low sintering temperature as well as the removal of oxygen-related defects in the system. Relative densities of over 96% of the theoretical value were obtained after sintering at 1600°C for 8 h, indicating that an adequate amount of additives and the use of the micro hot-pressed (MHPed) sintering process help improve the densification and thermal conductivity of AlN ceramics. The high thermal conductivity of 130 Wm-1'K-1 was attributed to the purification of the AlN lattice, the elimination of some secondary phases, and the grain boundary phase distribution.

AB - AlN samples doped with sub-micron Y2O3 and CaO powders as sintering additives obtained using the micro hot-pressed (MHPed) sintering method in a MoSi2 heating element furnace were investigated. The minor amounts of secondary phases were identified as A1 5Y3O12, CaYAl3O7, and CaAl4O7, which are related to the low sintering temperature as well as the removal of oxygen-related defects in the system. Relative densities of over 96% of the theoretical value were obtained after sintering at 1600°C for 8 h, indicating that an adequate amount of additives and the use of the micro hot-pressed (MHPed) sintering process help improve the densification and thermal conductivity of AlN ceramics. The high thermal conductivity of 130 Wm-1'K-1 was attributed to the purification of the AlN lattice, the elimination of some secondary phases, and the grain boundary phase distribution.

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