$\textrm{Y}_{0.8}\textrm{Ta}_{0.2}\textrm{O}_{1.7}$-MO(M=Ba, Sr, Ca 및 Mg)계에 있어서 형석구조의 생성

Formation of the Fluorite Structure in the $\textrm{Y}_{0.8}\textrm{Ta}_{0.2}\textrm{O}_{1.7}$-MO(M=Ba, Sr, Ca and Mg) System

  • 김신 (요업기술원 정밀요업과) ;
  • 최순목 (연세대학교 세라믹공학과) ;
  • 이홍림 (연세대학교 세라믹공학과)
  • Kim, Shin (Fine ceramics division, Institute of ceramic Technology) ;
  • Choi, Soon-Mok (Department of Ceramics Engineering, Yonsei University) ;
  • Lee, Hong-Lim (Department of Ceramics Engineering, Yonsei University)
  • 발행 : 1997.01.01

초록

$Y_{0.8}Ta_{0.2}O_{1.7}$-MO(M=Ba, Sr, Ca 및 Mg) 계에서의 형석구조의 생성과 이와 관련된 구조에 관하여 연구하였다. BaO또는 SrO를 4mol% 첨가한 조성에서는 결함형석구조 이외에 입방정 perovskite형 규칙구조인 $Ba_{2}YTaO_{6}$$Sr_{2}YTaO_{6}$와 입방정 $Y_{2}O_{3}$가 관찰되었다. CaO를 첨가한 경우에는 8mol%이상을 첨가한 조성에서부터 단사정 $Ca_{2}YTaO_{6}$$Y_{2}O_{3}$의 2차상이 나타났다. MgO의 경우에는 12mol% MgO를 첨가한 조성까지는 형석구조의 단일상을 나타내어 MgO가 형석구조에 고용되는 것을 알수 있었으며, 16 mol%조성부터는 2차상으로 MgO가 관찰되었다. 그러므로 위의 계에서 형석구조의 생성은 $A_{2}$(B'B")$O_6$의 생성과 첨가된 양이온의 크기에 영향을 받는 것으로 생각된다.생각된다.

Formation of fluorite structure and other related crystal structures in the $Y_{0.8}Ta_{0.2}O_{1.7}$-MO(M=Ba, Sr, Ca and Mg) system has been studied $Ba_2YTaO_6,\;Sr_2YTaO_6$ of cubic perovskite type ordered structure anti $Y_2O_3$ of cubic structure were produced besides the defect fluorite structure when 4 moIob of BaO or SrO was added to $Y_{0.8}Ta_{0.2}O_{1.7}$ When CaO more than 8 nlol"/o was added to $Y_{0.8}Ta_{0.2}O_{1.7}$, monoclinic: $Ca_2YTaO$, and cubic $Y_2O_3$ were pri~tlucecl ;IS this sec:onci phases hesides the main fluorite truc,ture. Smglc phase of fluorite structure \vas 1)roduc:ciI when MgO was added up to 12 mol%, however, MgO appeared as the second phase besides the main fluorire structure when MgO was added more than lti moI0'. Consquently, it is considered rh;it the formation of tluorite structure is related with the formation of the cubic perovskite type ordered structure of $A_2(B'B")O_6$ as well as the cation radii of the additives.additives.

키워드

참고문헌

  1. J. Am. Ceram. Soc. v.76 no.3 N. Q. Minh
  2. Advanced in Ceramics v.3 Science and Technology of Zirconia E. M. Logothetis;A. H. Heuer(ed.);L. W. Hobbs(ed.)
  3. International Series of Monographs in Solid State Physics v.7 Structure and Properties of Inorganic Solids F. S. Galasso;N. Kurti(ed.);R. Smoruchowski(ed.)
  4. Chem. Rev. v.70 no.3 T. H. Etsell;S. N. Flengas
  5. Physics of Electrolytes v.1 Transport Process in Solid Electrolytes and in Electrodes A. Kvist;J. Hladik(ed.)
  6. Naturwissenschaften v.31 C. Wagner
  7. Fast Ion Transport in Solids C. B. Choundry;E. C. Subbarao;P. Vashishta(ed.);J. Mundy(ed.);G. Shenoy(ed.)
  8. J. Am. Ceram. Soc. v.74 no.12 D. J. Kim;T. Y. Tien
  9. Br. Ceram. Trans. J. v.89 C. Zheng;A. R. West
  10. J. Solid State Chem. v.56 G. W. Jordan;M. G. Mctaggart;M. F. berard
  11. J. Am. Ceram. Soc. v.65 no.8 D. Michel;M. P. Jorba
  12. Mater. Lett. v.11 no.8;9 Z. Huang;D. Yan.;T. Tien;I. Chen
  13. J. Am. Ceram. Soc. v.59 no.3;4 N. Mizutani;Y. Tajima;M. Kato
  14. Russ. J. Inorg. Chem. v.29 no.12 G. V. Shamrai;A. V. Zagorodnyuk;R. L. Magunov;A. P. Zhinova
  15. J. Am. Ceram. Soc. v.74 no.9 Y. Yokogawa;N. Ishizawa;S. Somiya;M. Yoshimura
  16. J. Am. Ceram. Soc. v.74 no.9 Y. Yokowaga;M. Yoshimura
  17. Powder Diffraction File Card No. 19-147, Joint Committee on Powder Diffraction Standards
  18. J. Chem. Phys. v.44 no.7 F. Galasso;G. Layden;D. Flinchbaugh
  19. Structure and Properties of Inorganic Solids v.7 International Series of Monographs in Solid State Physics F. S. Galasso;N. Kurti(ed.);R. Smoruchouski(ed.)
  20. Acta Cryst. v.A32 no.5 R. D. Shannon
  21. Inorg. Mater. v.23 no.9 A. V. Shevchenko;L. M. Lopato;G. I. Gerasimyuk;Z. A. Zaitseva
  22. J. Am. Ceram. Soc. v.52 no.4 T. Noguchi;T. Okubo;O. Yonemochi
  23. Powder Diffraction File, Card No. 30-793, Joint Committee on Powder Diffraction Standards
  24. J. Mat. Sci. v.26 no.2 P. Duran;J. M. Rodriguez;P. Recio