Sintering of aluminum nitride by using alumina crucible and MoSi2 heating element at temperatures of 1650 °C and 1700 °C

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

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Aluminum nitride (AlN) ceramics, prepared with Y2O3 and CaO sintering additives, have been densified in an Al2O3 crucible at temperatures of up to 1650 °C and 1700 °C using a conventional MoSi2 heating element furnace. The results of this study show that relative densities in excess of 99% of theoretical and a relatively high-thermal conductivity of 147 W m-1 K-1 have been achieved for feedstock materials prepared with combined addition of 1 wt.% Y2O3 and 1 wt.% CaO. All of the phases in sintered samples have been shown to be crystalline AlN and minor amount of secondary phases, were detected such as enriched Y- and Ca-aluminates by the XRD patterns, back-scattered imagery and microprobe analysis. The advantage of using the particular experimental system and sintering condition is considered to be amenable to lower production cost and enhance the feasibility of mass production. Critical temperature for AlN densification to obtain the highest density is about 1650 °C.

Original languageEnglish
Pages (from-to)3455-3461
Number of pages7
JournalCeramics International
Volume35
Issue number8
DOIs
Publication statusPublished - 2009 Dec 1

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Electric heating elements
Aluminum nitride
Aluminum Oxide
Crucibles
Alumina
Sintering
Densification
Temperature
Feedstocks
Thermal conductivity
Furnaces
Crystalline materials
aluminum nitride
Costs

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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title = "Sintering of aluminum nitride by using alumina crucible and MoSi2 heating element at temperatures of 1650 °C and 1700 °C",
abstract = "Aluminum nitride (AlN) ceramics, prepared with Y2O3 and CaO sintering additives, have been densified in an Al2O3 crucible at temperatures of up to 1650 °C and 1700 °C using a conventional MoSi2 heating element furnace. The results of this study show that relative densities in excess of 99{\%} of theoretical and a relatively high-thermal conductivity of 147 W m-1 K-1 have been achieved for feedstock materials prepared with combined addition of 1 wt.{\%} Y2O3 and 1 wt.{\%} CaO. All of the phases in sintered samples have been shown to be crystalline AlN and minor amount of secondary phases, were detected such as enriched Y- and Ca-aluminates by the XRD patterns, back-scattered imagery and microprobe analysis. The advantage of using the particular experimental system and sintering condition is considered to be amenable to lower production cost and enhance the feasibility of mass production. Critical temperature for AlN densification to obtain the highest density is about 1650 °C.",
author = "Chu, {Chih Hung} and Lin, {Chih Peng} and Wen, {Shaw Bing} and Yun-Hwei Shen",
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Sintering of aluminum nitride by using alumina crucible and MoSi2 heating element at temperatures of 1650 °C and 1700 °C. / Chu, Chih Hung; Lin, Chih Peng; Wen, Shaw Bing; Shen, Yun-Hwei.

In: Ceramics International, Vol. 35, No. 8, 01.12.2009, p. 3455-3461.

Research output: Contribution to journalArticle

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AU - Chu, Chih Hung

AU - Lin, Chih Peng

AU - Wen, Shaw Bing

AU - Shen, Yun-Hwei

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AB - Aluminum nitride (AlN) ceramics, prepared with Y2O3 and CaO sintering additives, have been densified in an Al2O3 crucible at temperatures of up to 1650 °C and 1700 °C using a conventional MoSi2 heating element furnace. The results of this study show that relative densities in excess of 99% of theoretical and a relatively high-thermal conductivity of 147 W m-1 K-1 have been achieved for feedstock materials prepared with combined addition of 1 wt.% Y2O3 and 1 wt.% CaO. All of the phases in sintered samples have been shown to be crystalline AlN and minor amount of secondary phases, were detected such as enriched Y- and Ca-aluminates by the XRD patterns, back-scattered imagery and microprobe analysis. The advantage of using the particular experimental system and sintering condition is considered to be amenable to lower production cost and enhance the feasibility of mass production. Critical temperature for AlN densification to obtain the highest density is about 1650 °C.

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