CAS glass와 Yb2O3를 이용한 2차상의 형상 제어가 AlN 세라믹의 열전도도 및 기계적 특성에 미치는 영향
Effect of Morphological Control of Secondary Phase using Yb2O3 and Ca-Al-Si-O-based Glass on Thermal and Mechanical Properties of AlN
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We investigate the effects of Yb2O3 and calcium aluminosilicate (CAS) glass as sintering additives on the sintering behavior of AlN. The AlN specimens are sintered at temperatures between 1700oC and 1900oC for 2 h in a nitrogen atmosphere. When the Yb2O3 content is low (within 3 wt.%), an isolated shape of secondary phase is observed at the AlN grain boundary. In contrast, when 3 wt.% Yb2O3 and 1 wt.% CAS glass are added, a continuous secondary phase is formed at the AlN grain boundary. The thermal conductivity decreases when the CAS glass is added, but the sintering density does not decrease. In particular, when 10 wt.% Yb2O3 and 1 wt.% CAS glass are added to AlN, the flexural strength is the highest, at 463 MPa. These results are considered to be influenced by changes in the microstructure of the secondary phase of AlN.
Abstract
We investigate the effects of Yb2O3 and calcium aluminosilicate (CAS) glass as sintering additives on the sintering behavior of AlN. The AlN specimens are sintered at temperatures between 1700oC and 1900oC for 2 h in a nitrogen atmosphere. When the Yb2O3 content is low (within 3 wt.%), an isolated shape of secondary phase is observed at the AlN grain boundary. In contrast, when 3 wt.% Yb2O3 and 1 wt.% CAS glass are added, a continuous secondary phase is formed at the AlN grain boundary. The thermal conductivity decreases when the CAS glass is added, but the sintering density does not decrease. In particular, when 10 wt.% Yb2O3 and 1 wt.% CAS glass are added to AlN, the flexural strength is the highest, at 463 MPa. These results are considered to be influenced by changes in the microstructure of the secondary phase of AlN.
참고문헌 (19)
- G. A. Slack, , J. Phys. Chem. Solids, 34, pp.321~ (1973)
- K. Komeya, , J. Am. Ceram. Soc, 57, pp.411~ (1974)
- T. B. Troczynski, , J. Am. Ceram. Soc, 72, pp.1488~ (1989)
- L. M. Sheppard, , Am. Ceram. Soc. Bull, 69, pp.1801~ (1990)
- J. Jarrige, , J. Eur. Ceram. Soc, 17, pp.1891~ (1997)
- U. Betke, , Adv. Eng. Mater, 19, pp.1700138~ (2017)
- A. Klimera, , J. Eur. Ceram. Soc, 27, pp.1419~ (2007)
- A. V. Virkar, , J. Am. Ceram. Soc, 72, pp.2031~ (1989)
- T. B. Jackson, , J. Am. Ceram. Soc, 80, pp.1421~ (1997)
- G. Pezzotti, , J. Eur. Ceram. Soc, 20, pp.1319~ (2000)
- S. M. Olhero, , J. Eur. Ceram. Soc, 26, pp.2475~ (2006)
- Y. Xiong, , J. Eur. Ceram. Soc, 33, pp.2199~ (2013)
- H. -K. Lee, , J. Am. Ceram. Soc, 97, pp.805~ (2014)
- H. M. Lee, , Adv. Eng. Mater, 16, pp.655~ (2014)
- W. J. Kim, , J. Am. Ceram. Soc, 79, pp.1066~ (1996)
- H. J. Park, , J. Am. Ceram. Soc, 80, pp.750~ (1997)
- S. Y. Kim, , J. Ceram. Int, 45, pp.17930~ (2019)
- 채재홍, "상압 소결법으로 제조된 이트리아 첨가 질화 알루미늄 세라믹스의 미세 구조 및 열전도도", 한국결정성장학회지, 19(1), pp.33~38 (2009), 한국결정성장학회
- H. M. Lee, , J. Euro. Ceram. Soc, 34, pp.3627~ (2014)