In this study, the effect of the content of MgO-CaO-Al2O3-SiO2 (MCAS) glass additives on the properties of AlN ceramics is investigated. Dilatometric analysis and isothermal sintering for AlN compacts with MCAS contents varying between 5 and 20 wt% are carried out at temperatures ranging up to 1600℃. The results showed that the shrinkage of the AlN specimens increases with increasing MCAS content, and that full densification can be obtained irrespective of the MCAS content. Moreover, properties of the AlN-MCAS specimens such as microhardness, thermal conductivity, dielectric constant, and dielectric loss are analyzed. Microhardness and thermal conductivity decrease with increasing MCAS content. An acceptable candidate for AlN application is obtained: an AlN-MCAS composite with a thermal conductivity over 70 W/m·K and a dielectric loss tangent (tan δ) below 0.6 × 10−3, with up to 10 wt% MCAS content.

Abstract
 1. 서 론
 2. 실험방법
 3. 결과 및 고찰
 4. 결 론
 References

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