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

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 languageEnglish
Pages (from-to)525-529
Number of pages5
JournalJournal of Ceramic Processing Research
Volume12
Issue number5
Publication statusPublished - 2011 Dec 19

Fingerprint

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

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

Cite this

@article{d61a4c03f9d8410793ba90b3c79bdb8e,
title = "Thermal conductivity of micro hot-pressed AlN ceramics fabricated using a conventional MoSi2 heating element furnace",
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.",
author = "Lin, {Chih Peng} and Chu, {Chih Hung} and Wen, {Shaw Bing} and Yun-Hwei Shen",
year = "2011",
month = "12",
day = "19",
language = "English",
volume = "12",
pages = "525--529",
journal = "Journal of Ceramic Processing Research",
issn = "1229-9162",
publisher = "Hanyang University",
number = "5",

}

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 journalArticle

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.

UR - http://www.scopus.com/inward/record.url?scp=83455225663&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=83455225663&partnerID=8YFLogxK

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 -