A Study on the Microstructural Control of LAS Ceramics (III) : Influence of Li2O.4B2O3 Frit Addition on the Microstructure and Thermal Expansion of $\beta$-Spodumene made from Kaolinite

LAS계 내열충격성 재료의 미세구조 제어(III): Li2O.4B2O3 첨가가 카올린을 공급원으로하여 합성한 $\beta$-Spodumene의 미세구조 및 열팽창특성에 미치는 영향

  • 박정현 (연세대학교 세라믹공학과) ;
  • 김현민 (연세대학교 세라믹공학과) ;
  • 이화선 (연세대학교 세라믹공학과)
  • Published : 1992.08.01

Abstract

Effect of Li2O.4B2O3 frit addition on microstructural and thermal expansion behaviour of the $\beta$-spodumene ceramics made from kaolinite was investigated. With 2.0~4.0 wt% frit addition, the densification by liquid phase sintering caused low water absorption below 3% and enhancement of beding strength. As the amount of frit addition was increased, thermal expansion coefficient was increased to large scale, but in 2 wt% frit addition, its thermal expansion coefficient was constrained to 1.92$\times$10-6$^{\circ}C$-1.

Keywords

References

  1. J. Am. Ceram Soc. v.34 no.8 Thermal Expansion of Some Synthetic Lithia Minerals F.A. Hummel
  2. 日本セラミックス協會學術論文誌 v.98 no.7 ジル-グル法によβ-スポジュメソ粉末の 合成と 燒結特性 小木秀彦;石槁昇;秋葉德二;三田村孝
  3. セラミックス v.14 no.11 低膨脹セラミソクス: 熱膨脹と 結晶構造 宇田川重和;井川博行
  4. J. Am. Ceram. Soc. v.33 no.5 Compositional and Stability Relationships Among the Lithium Aluminosilicates: Eucryptite, Spodumene and Petalite Rustum Roy;Della M. Roy;E.F. Osborn
  5. J. Am. Ceram. Soc. v.69 no.1 Structual Mechanism of Anomalous Thermal Expansion of Cordierite-Beryl and Other Framwork Silicate M.F. Hochella;Jr;G. Brown;Jr
  6. J. Am. Ceram. Soc. v.66 no.3 Thermal Expansion of Alkah Borate Glasses J.E. Shelby
  7. J. Am. Ceram. Soc. v.65 no.11 Properties and Structure of Lithium Borate and Strontium Borate Glasses Y. Ohta;M. Koizami;M. Simada
  8. ファイソセラミックス事典 ファイソセラミックス編?委
  9. U.S Patent No. 4301214 Low Thermal Expansion Ceramic and Process William B. Crandall
  10. J. Appl Phys. v.41 no.1 Thermal Expansion Behavior S of Two-Phase Solids A.A. Fahmy;A.N. Ragai