Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지
DOI QR코드

DOI QR Code

Effects of Y2O3 Addition on Densification and Thermal Conductivity of AlN Ceramics During Spark Plasma Sintering

Y2O3 첨가가 AlN 세라믹스의 방전 플라즈마 소결 거동 및 열전도도에 미치는 영향

  • Chae, Jae-Hong (Korea Institute of Ceramic Engineering and Technology) ;
  • Park, Joo-Seok (Korea Institute of Ceramic Engineering and Technology) ;
  • Ahn, Jong-Pil (Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Kyoung-Hun (Korea Institute of Ceramic Engineering and Technology) ;
  • Lee, Byung-Ha (Korea Institute of Ceramic Engineering and Technology)
  • Published : 2008.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

Spark plasma sintering (SPS) of AlN ceramics were carried out with ${Y_2}{O_3}$ as sintering additive at a sintering temperature $1,550{\sim}1,700^{\circ}C$. The effect of ${Y_2}{O_3}$ addition on sintering behavior and thermal conductivity of AlN ceramics was studied. ${Y_2}{O_3}$ added AlN showed higher densification rate than pure AlN noticeably, but the formation of yttrium aluminates phases by the solid-state reaction of ${Y_2}{O_3}$ and ${Al_2}{O_3}$ existed on AlN surface could delay the densification during the sintering process. The thermal conductivity of AlN specimens was promoted by the addition of ${Y_2}{O_3}$ up to 3 wt% in spite of the formation of YAG secondary phase in AlN grain boundaries because ${Y_2}{O_3}$ addition could reduced the oxygen contents in AlN lattice which is primary factor of thermal conductivity. However, the thermal conductivity rather decreased over 3 wt% addition because an immoderate formation of YAG phases in grain boundary could decrease thermal conductivity by a phonon scattering surpassing the contribution of ${Y_2}{O_3}$ addition.

Keywords

References

  1. G. A. Slack, "Nonmetallic Crystals with High Thermal Conductivity," J. Phys. Chem. Solids, 34 321-35 (1973) https://doi.org/10.1016/0022-3697(73)90092-9
  2. L. M. Sheppard, "Aluminum nitride: a versatile but challenging material," Am. Ceram. Soc. Bull., 69 1801-03 (1990)
  3. Y. Baik and R. A. Drew, "Aluminum Nitride: Processing and Applications," Key Eng. Mater., 122-124 553-70 (1996) https://doi.org/10.4028/www.scientific.net/KEM.122-124.553
  4. K. Komeya, H. Inoue, and A. Tsuge, "Effect of Various Additives on Sintering of Aluminum Nitride," Yogyo-Kyokaishi, 93 41-6 (1985)
  5. K. Komeya, H. Inoue, and A. Tsuge, "Role of Y2O3 and SiO2 Additions in Sintering of AlN," J. Am. Ceram. Soc., 54 411-12 (1974)
  6. A. V. Virkar, T. B. Jackson, and R. A. Cutler, "Thermodynamic and Kinetic Effects of Oxygen Removal on the Thermal Conductivity of Aluminum Nitride," J. Am. Ceram. Soc., 72 2031-42 (1989) https://doi.org/10.1111/j.1151-2916.1989.tb06027.x
  7. T. B. Jackson, A. V. Virkar, K. L. More, R. B. Dinwideie, and R. A. Cutler, "High Thermal Conductivity Aluminum Nitride Ceramics: the Effect of Thermodynamic, Kinetic and Microstructural Factors," J. Am. Ceram. Soc., 80 1421- 35 (1997) https://doi.org/10.1111/j.1151-2916.1997.tb03000.x
  8. M. Tokita, "Trends in Advanced SPS(Spark Plasma Sintering) Systems and Technology," J. Soc. Powder & Tech. Jpn., 30 790-804 (1993) https://doi.org/10.4164/sptj.30.11_790
  9. M. Omori, "Sintering, Consolidation, Reaction and Crystal Growth by the Spark Plasma System (SPS)," Mater. Sci & Eng., A 287 183-88 (2000) https://doi.org/10.1016/S0921-5093(00)00773-5
  10. G. Pezzotti, A. Nakahira, and M. Tajika, "Effect of Extended Annealing Cycles on the Thermal Conductivity of AlN/Y2O3 Ceramics," J. Euro. Ceram. Soc., 20 1319-25 (2000) https://doi.org/10.1016/S0955-2219(99)00286-1
  11. S. W. Choi, H. C. Lee, J. Rhee, and I. C. Lee, "Sintering of Aluminum Nitride (I); Pressureless Sintering," J. Kor. Ceram. Soc., 28 457-64 (1991)
  12. J. Y. Qiu, Y. Hotta, K. Watari, K. Mitsuishi, and M. Yamazaki, "Low-temperature Sintering Behavior of the Nano-sized AlN Powder Achived by Super-fine Grinding Mill with Y2O3 and CaO Additives," J. Euro. Ceram. Soc., 26 385-90 (2006) https://doi.org/10.1016/j.jeurceramsoc.2005.06.016
  13. M. Medraj, Y. Baik, W. T. Thompson, and R. A. L. Drew, "Understanding AlN Sintering Through Computational Thermodynamics Combined with Experimental Investigation," J. Mater. Proc. Tech., 161 415-22 (2005) https://doi.org/10.1016/j.jmatprotec.2004.05.031
  14. M. Kasori and F. Ueno, "Thermal Conductivity Improvement of YAG Added AlN Ceramics in the Grain Boundary Elimination Process," J. Euro. Ceram. Soc., 15 435-43 (1995) https://doi.org/10.1016/0955-2219(95)91432-N
  15. L. Qiao, H. Zhou, H. Xue, and S. Wang, "Effect of Y2O3 on Low Temperature Sintering and Thermal Conductivity of AlN Ceramics," J. Euro. Ceram. Soc., 23 61-7 (2003) https://doi.org/10.1016/S0955-2219(02)00079-1

Cited by

  1. Effect of High Energy Ball Milling on Sintering Behavior and Thermal Conductivity of Direct Nitrided AlN Powder vol.48, pp.5, 2011, https://doi.org/10.4191/kcers.2011.48.5.418
  2. Fabrication and Densification Behavior Analysis of Metalizing Targets Using ZrO2 Nanopowders by Magnetic Pulsed Compaction vol.52, pp.6, 2011, https://doi.org/10.2320/matertrans.M2010398