Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Sintering Behavior and Thermal Conductivity of Aluminum Nitride Ceramics with MgO-CaO-Al2O3-SiO2 Nano-glass Additive

나노 MgO-CaO-Al2O3-SiO2 glass 첨가제를 가진 AlN의 소결거동 및 열전도도

  • Baik, Su-Hyun (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Kyung Min (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Ryu, Sung-Soo (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology)
  • 백수현 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 김경민 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 류성수 (한국세라믹기술원 이천분원 엔지니어링세라믹센터)
  • Received : 2018.10.15
  • Accepted : 2018.10.19
  • Published : 2018.10.28
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Abstract

In this study, $MgO-CaO-Al_2O_3-SiO_2$ (MCAS) nanocomposite glass powder having a mean particle size of 50 nm and a specific surface area of $40m^2/g$ is used as a sintering additive for AlN ceramics. Densification behaviors and thermal properties of AlN with 5 wt% MCAS nano-glass additive are investigated. Dilatometric analysis and isothermal sintering of AlN-5wt% MCAS compact demonstrates that the shrinkage of the AlN specimen increases significantly above $1,300^{\circ}C$ via liquid phase sintering of MCAS additive, and complete densification could be achieved after sintering at $1,600^{\circ}C$, which is a reduction in sintering temperature by $200^{\circ}C$ compared to conventional $AlN-Y_2O_3$ systems. The MCAS glass phase is satisfactorily distributed between AlN particles after sintering at $1,600^{\circ}C$, existing as an amorphous secondary phase. The AlN specimen attained a thermal conductivity of $82.6W/m{\cdot}K$ at $1,600^{\circ}C$.

Keywords

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  1. Effect of MgO-CaO-Al2O3-SiO2 Glass Additive Content on Properties of Aluminum Nitride Ceramics vol.25, pp.6, 2018, https://doi.org/10.4150/KPMI.2018.25.6.494