Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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A Synthesis of Mullite-Cordierite Composite Powders by Solution-Polymerization Route Based on Polyvinyl Alcohol

PVA를 이용한 Solution-Polymerization 합성법에 의한 Mullite-Cordierite 복합분말의 합성

  • 이용석 (명지대학교 세라믹공학과) ;
  • 이병하 (명지대학교 세라믹공학과)
  • Published : 2004.09.01
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Abstract

Mullite and cordierite, which were stable oxides having excellent thermal and chemical characteristics, were widely used as an engineering and electronic materials. However, thermal shock resistance of the mullite was detriorated, and strength of the cordierite was also reduced at high temperatures. The mullite-cordierite composite powders were synthesized for solving these problems in this study. The mullite-cordierite composite powders were manufactured by the solution-polymerization method using mixtures of fused silica, aluminium nitrate, magnesium nitrate, and PVA. Crystallinity, phase formation, density, and surface area of the synthesis powders were characteristics. Fine mullite-cordlerite composite powders were successfully synthesized at 1300$^{\circ}C$ and their surface areas were about 20㎡/g after planetary milling for 1h. With increasing the milling time, surface area increased to 23 ㎡/g for 4h ana 24㎡/g for 8h.

Mullite와 cordierite는 우수한 열적, 화학적 특성을 나타내는 안정된 산화물로서 다양한 구조재료 및 전자재료에 사용되어지고 있으나, mullite의 경우 내열충격성이, cordierite의 경우 고온강도가 떨어지는 단점이 있다. 이와 같은 단점을 서로 보완하기 위한 mullite-cordierite 복합체에 대한 연구가 진행되고 있다 본 연구에서는 fused silica, aluminium nitrate, magnesium nitrate와 PVA의 혼합을 이용한 solution-polymerization 합성법에 의해, mullite-cordierite복합분말을 합성하고 생성상 및 결정성, 밀도 및 비표면적 등의 특성을 분석하였다 그 결과, 본 실험의 모든 조성에서 있어서 130$0^{\circ}C$로 열처리하였을 경우, mullite와 cordierite의 상이 공존하는 복합분말이 생성되는 것을 확인할 수 있었다. 이 mullite-cordierite복합 분말을 planetary milli로 1시간 분쇄하였을 때 비표면적은 약 20 $m^2$/g로서 미립의 분말이 확인되어졌고, 분쇄시간의 증가에 따라 4시간에서는 23$m^2$/g, 8시간에서는 24$m^2$/g로 비표면적이 증가하였다.

Keywords

References

  1. S. Kansaki, 'High-Purity Mullite Ceramics,' Bull. Ceram. Soc. Jpn., 23 [11] 1060-63 (1988)
  2. D. W. Hoffman, R. Roy, and S. Komameni, 'Diphasic Xerogels, A New Class of Materials: Phases in the System $Al_2O_3-SiO_2$ ' J. Am. Ceram. Soc., 67 [7] 468-71 (1984) https://doi.org/10.1111/j.1151-2916.1984.tb19636.x
  3. Y. Hirata, H. Minamizono, and K. Shimada, 'Property of $SiO_2-Al_2O_3$ Powders Prepared from Metal Oxide,' YogyoKyokai- Shi, 93 [1] 36-44 (1985)
  4. H. Saito and H. Suzuki, 'Processing of the Fine Mullite Powder form Metal-Alkoxides and Its Sintering,' Yogyo-Kyokai- Shi, 95 [7] 697-702 (1987)
  5. K. H. Lee, B. H. Lee, Y. H. Kim, K. O. Oh, and Y. H. Baik, 'Synthesis of Pure Fine Mullite Powders by Sol-Gel Process,' J. Kor. Ceram. Soc., 28 [7] 503-08 (1991)
  6. H. Suzuki, K. Ota, and H. Saito, 'Preparation of Cordierite Ceramics from Metal Alkoxides(Part I),' J. Ceram. Soc. lpn., 95 [2] 163-69 (1987)
  7. H. Suzuki, K. Ota, and H. Saito, 'Preparation of Cordierite Ceramics from Metal Alkoxides(Part 2),' J. Ceram. Soc. lpn., 95 [2] 170-75 (1987)
  8. F. Singer and W. M. Chon, 'New Ceramic Bodies Composition and Expansion on Behavior'" Ber. Deut. Keram. Ges., 10 [6] 269-84 (1929)
  9. R. F. Geller and H. Insley, 'Thermal Expansion of Some Silicate of Elements in Group and Petiodic System,' Bur. Standards. J. Res., 9 [1] 35-46 (1932) https://doi.org/10.6028/jres.009.006
  10. R. J. Beal and R. L. Cooke, 'Low Expansion Cordierite Porcelian,' J. Am. Ceram. Soc., 35 [2] 53-7 (1952) https://doi.org/10.1111/j.1151-2916.1952.tb13066.x
  11. M. H. Han and K. C. Park, 'Synthesis and Sintering of Cordierite from Metal Alkoxides(I),' J. Kor. Ceram. Soc., 27 [5] 625-30 (1990)
  12. M. H. Han and K. C. Park, 'Synthesis and Sintering of Cordierite from Metal Alkoxides(II),' J. Kor. Ceram. Soc., 27 [6] 777-82 (1990)
  13. Y. K. Kim, R. H. Kim, et al., 'Studies of the Mullite-Cordierite Composites as a Substrate Material,' J. Kor. Ceram. Soc., 27 [3] 394-400 (1990)
  14. C. E. Kim, H. L. Lee, et al., 'Fabrication and Sintering Characteristic of $MgO-Al_2O_3-SiO_2$ System Ceramic Raw Materials (Mullite, Spinel, and Cordierite),' J. Kor. Ceram. Soc., 26 [5] 593-600 (1989)
  15. J. Takahashi, M. Natsuisaka, and S. Shimada, 'Fabrication of Cordierite-Mullite Ceramic Composites with Differently Shaped Mullite Grains,' J. Eur. Ceram. Soc., 22 479-85 (2002) https://doi.org/10.1016/S0955-2219(01)00312-0
  16. B. H. Musseler and M. W. Shafer, 'Preparation and Properties of Mullite Cordierite Composites,' Presented at the 85th Annual Meeting of the Am. Ceram. Soc., Chicago (1983)
  17. J. D. Hodge, 'Microstructure Development in Mullite Cordierite Ceramics,' U.S. Patent, 45282275 (1985)
  18. S. J. Lee, E. A. Benson, and W. M. Kriven, 'Preparation of Potrant Cement Components by Poly(vinyl alcohol) Solution Polymerization' J. Am. Ceram, Soc., 82 [8] 249-55 (1999)
  19. Y. S. Lee and B. H. Lee, 'A Synthesis of Mullite and Cordierite Ceramics by Solution-Polymerization Route Based on PVA,' J. Kor. Ceram. Soc., 41 [2] 151-57 (2004) https://doi.org/10.4191/KCERS.2004.41.2.151