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Electronic Materials Letters

, Volume 12, Issue 6, pp 732–737 | Cite as

Synthesis of MgO-CaO-Al2O3-SiO2 nanocomposite powder by polymeric complex method as a novel sintering additive of AlN ceramics

  • Hwa-Jun Lee
  • Woo-Seok Cho
  • Hyeong Jun Kim
  • Wei Pan
  • Mohammad Shahid
  • Sung-Soo RyuEmail author
Article

Abstract

A MgO-CaO-Al2O3-SiO2 (MCAS) nanocomposite powder with a particle size of 50 nm and a specific surface area of 40.6 m2/g was successfully synthesized via heat-treatment of polymeric precursors containing Mg, Ca, Al and Si in air at 700 °C for 5 h. It was characterized as a novel sintering additive for the densification AlN ceramics at a low temperature below 1600 °C. It was found that the nanosized MCAS powder was suitable for the densification of AlN ceramics. In particular, full densification could be achieved when only 1.0 wt% MCAS additive-doped AlN powder compact was sintered for 1 h at 1600 °C, and a thermal conductivity of 84 W/m·K was attained.

Keywords

nanocomposite sintering polymeric complex method AlN sintering additive raw materials 

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Copyright information

© The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • Hwa-Jun Lee
    • 1
  • Woo-Seok Cho
    • 1
  • Hyeong Jun Kim
    • 1
  • Wei Pan
    • 2
  • Mohammad Shahid
    • 2
  • Sung-Soo Ryu
    • 1
    Email author
  1. 1.Korea Institute of Ceramic Engineering and TechnologyIcheonKorea
  2. 2.State Key Laboratory of New Ceramics and Fine Processing, Department of Material Science and EngineeringTsinghua UniversityBeijingChina

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