Sol-Gel법에 의한 $ZrO_2$ Ceramic Fiber 제조 : (II) CaO 첨가가 미세구조 및 상전이에 미치는 영향

Fabrication of Zirconia Ceramic Fiber by Sol-Gel Processing: (II) The Doping Effect of CaO on Their Microstructure and Phase Transition

  • 김선욱 (산업과학기술연구소(RIST)) ;
  • 윤만순 (산업과학기술연구소(RIST)) ;
  • 송인호 (산업과학기술연구소(RIST))
  • 발행 : 1991.10.01

초록

Pure zirconia ceramic fiber experiences severe volume changes through thermal cyclings of heating and cooling. Zirconia fiber was doped with CaO to stabilize the phase and its effect of CaO was studied on volumetric ratio of each phases, phase transition temperature and microstructure. Tetragonal phase was increased as CaO increases up to 10 mol% and cubic phase was stabilized when CaO was added more than 10 mol%. The average grain size of zirconia fiber was increased as CaO increased and transition temperature was shifted to lower temperature.

키워드

참고문헌

  1. Conference Series;The Institute of Physics no.30 liquid metals C.C.H. Wheatly(et al.);R. Evans(ed.);D.A. Greenwood(ed.)
  2. Trans. v.80 no.37 P. McGeehin
  3. Advances in Ceramics v.3 Factors Influencing the Performance of Zirconiabased Oxygen Monitors B.C.H. Steele(et al.);A.H. Heuer(ed.);L.W. Hobbs(ed.)
  4. J. Non-Cryst Solid. v.56 Preparation of Amorphous ZrO₂ Fibers by Unidirectional Freezing of Gel T. Kokubo(et al.)
  5. J. Mat. Sci. v.15 Preparation of Glass Fibers of the ZrO₂-SiO₂ and Na₂O-ZrO₂-SiO₂ Systems from Metal Alkoxides and their Resistance to Alkaline Solution S. Sakka;K. Kamiya
  6. Ultrastructure Processing of Ceramics, Glasses and Composties Fabrication of Zirconia Fibers from Sol-Gel M.J. Morten(et al.);L.L. Hench(ed.);D.R. Ulrich(ed.)
  7. US. Patents No. 3860529
  8. Sintering and Gram Growth in Tetragonal and Cubic Zirconia in Sintering '87 v.1 I.G. Lee;I-Wei Chen;N. Claussen(et al.)(ed.)
  9. Conversion Process of Gel Fivers Prepared from Zr(O-nC₃$H_7$)₄ by Sol-Gel Method to ZrO₂ fibers in Sintering '87 v.1 T. Yoko(et al.);S. Somiya(et al.)(ed.)
  10. J. Kor. Ceram. Soc. v.27 no.6 ZrO₂ Ceramic Fiber Fabrication by Sol-Gel Processing S. Kim(et al.)