Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지
DOI QR코드

DOI QR Code

Transparency of AlON Fabricated by Pressureless Reaction Sintering Using Various Sintering Aids

소결조제를 달리해 상압 반응소결로 제조된 AlON의 투명도

  • Koo, Bon-Kyung (Department of Materials Science and Engineering, Yeungnam University) ;
  • Koo, Kyeo-Hun (Department of Materials Science and Engineering, Yeungnam University) ;
  • Kim, Ji-Hye (Department of Materials Science and Engineering, Yeungnam University) ;
  • Jung, In-Chul (Department of Materials Science and Engineering, Yeungnam University) ;
  • Lee, Jae-Hyung (Department of Materials Science and Engineering, Yeungnam University)
  • 구본경 (영남대학교 신소재공학부) ;
  • 구교헌 (영남대학교 신소재공학부) ;
  • 김지혜 (영남대학교 신소재공학부) ;
  • 정인철 (영남대학교 신소재공학부) ;
  • 이재형 (영남대학교 신소재공학부)
  • Published : 2009.07.31
Download PDF
⟨ Previous Next ⟩

Abstract

AlON was fabricated by the pressureless reaction sintering of $Al_2O_3$-AlN powder mixtures. The ratio of AlN to $Al_2O_3$ as well as various sintering aids were the main variables for this study. The optimum ratio of AlN in the $Al_2O_3$-AlN mixture was approximately 35.0 mol%. For the sintering aids, only when a small amount of MgO was added together with $Y_2O_3$ and BN, AlON specimens could be sintered to a full density with negligible pores and high transparency. Other combinations of $Y_2O_3$, BN, CaO and MgO resulted in enough pores in the sintered specimens to have in-line transmittance only between 0% and 30%. The in-line transmittance reached over 80% after sintering at $1975^{\circ}C$ for 10 h for the specimen containing 0.15 wt% MgO, 0.08 wt% $Y_2O_3$ and 0.02 wt% BN.

Keywords

References

  1. G. C. Wei, 'Transparent Ceramic Lamp Envelope Materials,' J. Phys. D: Appl. Phys., 38 3057-65 (2005) https://doi.org/10.1088/0022-3727/38/17/S07
  2. D. W. Budworth, 'Transparency of Polycrystalline Ceramics,' Special Ceramics 5, Ed. P. Popper, The British Ceramic Research Association, England, 186 (1970)
  3. J. W. McCauley, 'A Simple Model for Aluminum Oxynitride Spinels,' J. Am. Ceram. Soc., 61 372-3 (1978) https://doi.org/10.1111/j.1151-2916.1978.tb09336.x
  4. J. W. McCauley and N. D. Corbin, ;Phase Relations and Reaction Sintering of Transparent Cubic Aluminum Oxynitride Spinel (ALON),; J. Am. Ceram. Soc., 62 476-79 (1979) https://doi.org/10.1111/j.1151-2916.1979.tb19109.x
  5. J. W. McCauley, P. Patel, M. Chen, G. Gilde, E. Strassburger, B. Paliwal, K.T. Ramesh, and D.P. Dandekar, 'AlON: A Brief History of Its Emergence and Evolution,' J. Eur. Ceram. Soc., 29 223-26 (2009) https://doi.org/10.1016/j.jeurceramsoc.2008.03.046
  6. L. M. Goldman, T. M. Hartnett, J. M. Wahl, R. J. Ondercin, and K. R. Olson, 'Recent Advances in Aluminum Oxynitride( ALONTM) Optical Ceramic,' Window and Dome Technologies and Materials VII, Randal W. Tustison Editor, Proceedings of SPIE, 4375 71-8 (2001) https://doi.org/10.1117/12.439195
  7. T. M. Hartnett, S. D. Bernstein, E. A. Maguire, and R. W. Tustison, 'Optical Properties of ALON (Aluminum Oxynitride),' Infrared Phy. and Tech., 39 203-11 (1998) https://doi.org/10.1016/S1350-4495(98)00007-3
  8. J. W. McCauley and N. D. Corbin, 'Process for Producing Polycrystalline Cubic Aluminum Oxynitride,' US Patent No. 4,241,000 (1980)
  9. E. A. Maguire, T. M. Hartnett, R. L. Gentilman, and Raytheon Co., 'Method of Producing Aluminum Oxynitride Having Improved Optical Characteristics,' US Patent No. 4,686,070, Oct. 29 (1984)
  10. R. L. Gentilman, E. A. Maguire, L. E. Dolhert, and Raytheon Co., "Transparent Aluminum Oxynitride and Method of Manufacture," US Patent No. 4,720,362, March. 20 (1985)
  11. T. Sakai, 'Hot-pressed Oxynitrides in the System AlN-$Al_2O_3$, Sintering Theory and Practice,' Mater. Sci. Monogr., 44 591-6 (1981)
  12. N.D. Corbin, 'Aluminum Oxynitride Spinel: A Review,' J. Eur. Ceram. Soc., 5 [3] 143-54 (1989) https://doi.org/10.1016/0955-2219(89)90030-7