Effect of Hydrogen and Ammonium Fluoride Addition on Combustion Synthesis of Fine AlN Powders and Their Sintered Properties

• Sakurai Toshitaka

  Graduate School of Eng., Osaka-University

• Miyamoto Yoshinari

  Joining and Welding Research Institute, Osaka-University

Bibliographic Information

Other Title

• 微粒ＡｌＮ粉末の燃焼合成における水素およびフッ化アンモニウムの添加効果と生成粉末の焼結特性
• 微粒AlN粉末の燃焼合成による水素およびフッ化アンモニウムの添加効果と生成粉末の焼結特性
• ビリュウ AlN フンマツ ノ ネンショウ ゴウセイ ニ ヨル スイソ オヨビ フッカ アンモニウム ノ テンカ コウカ ト セイセイ フンマツ ノ ショウケツ トクセイ

Abstract

The reaction temperature in the combustion synthesis of AlN was controlled by adding H₂ gas to the reactant N₂ gas in order to reduce the particle size of the products. The addition of 20 vol.% H₂ to reactant N₂ gas decreased the combustion temperature from 2680 K to 2300 K. This led to an increase in specific surface area (SSA) of the product from 1.02 m² · g^-1 to 1.58 m² · g^-1. When 1.0 mass% of NH₄F was added to the mixture of the raw Al powder and the AlN diluent, the residual Al was reduced from 1700 ppm to 200 ppm. The AlN powder synthesized with the addition of 10 vol.% of H₂ gas and 1.0 mass % of NH₄F was fully densified at 1810°C under 0.11 MPa of N₂ pressure for 180 min. The thermal conductivity of the sintered AlN measured by laser flash method was 160 W · m^-1K^-1.

Journal

• Journal of the Japan Society of Powder and Powder Metallurgy

  Journal of the Japan Society of Powder and Powder Metallurgy 52 (10), 757-762, 2005

  Japan Society of Powder and Powder Metallurgy

Keywords

• aluminum nitride
• combustion synthesis
• reaction control
• hydrogen
• ammonium fluoride

Details

• CRID: 1390001206307275392
• NII Article ID: 10018283471
• NII Book ID: AN00222724
• DOI: 10.2497/jjspm.52.757
• ISSN: 18809014
• ISSN: 05328799
• NDL BIB ID: 7709765
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7709765
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed