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.
| Original language | English |
|---|---|
| Pages (from-to) | 525-529 |
| Number of pages | 5 |
| Journal | Journal of Ceramic Processing Research |
| Volume | 12 |
| Issue number | 5 |
| Publication status | Published - 2011 Dec 19 |
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All Science Journal Classification (ASJC) codes
- Ceramics and Composites
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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.
In: Journal of Ceramic Processing Research, Vol. 12, No. 5, 19.12.2011, p. 525-529.Research output: Contribution to journal › Article
TY - JOUR
T1 - Thermal conductivity of micro hot-pressed AlN ceramics fabricated using a conventional MoSi2 heating element furnace
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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M3 - Article
VL - 12
SP - 525
EP - 529
JO - Journal of Ceramic Processing Research
JF - Journal of Ceramic Processing Research
SN - 1229-9162
IS - 5
ER -