In this study, MgO–CaO–Al2O3–SiO2 (MCAS) nanocomposite glass powder having a mean particle size of 50 nm and a specific surface area of 40 m2/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 1,300oC via liquid phase sintering of MCAS additive, and complete densification could be achieved after sintering at 1,600oC, which is a reduction in sintering temperature by 200oC compared to conventional AlN-Y2O3 systems. The MCAS glass phase is satisfactorily distributed between AlN particles after sintering at 1,600oC, existing as an amorphous secondary phase. The AlN specimen attained a thermal conductivity of 82.6 W/m·K at 1,600oC.

Abstract
 1. 서 론
 2. 실험방법
 3. 결과 및 고찰
  3.1. 하소온도가 서로 다른 MCAS가 첨가된 AlN의 소결밀도
  3.2. AlN-5wt% MCAS glass의 소결거동
  3.3. AlN-5wt% MCAS 소결체의 미세구조
  3.4. AlN-5wt% MCAS 소결체의 X-선 회절분석
  3.5. AlN-5wt% MCAS 소결체의 열전도도
 4. 결 론
 References

• 백수현(한국세라믹기술원 이천분원 엔지니어링세라믹센터, 한양대학교 신소재공학부) | Su-Hyun Baik (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology, Department of Materials Science and Engineering, Hanyang University)
• 김경민(한국세라믹기술원 이천분원 엔지니어링세라믹센터, 한양대학교 신소재공학부) | Kyung Min Kim (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology, Department of Materials Science and Engineering, Hanyang University)
• 류성수(한국세라믹기술원 이천분원 엔지니어링세라믹센터) | Sung-Soo Ryu (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) Corresponding Author