Bulletin of the Korean Chemical Society

  • 제16권2호
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  • Pages.120-125
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  • 1995
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Synthesis, Structural and Electrical Characterizations of $Pr_{2-x}Ba_xNiO_{4{\pm}\delta}{^\$}$

  • 발행 : 19950200
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초록

Solid solutions of Pr2-xBaxNiO4±δ with K2NiF4-type structure were prepared in air and characterized by powder X-ray diffraction, Rietveld refinements, iodometry titrations, and conductivity measurements. The range of the solid solution was 0 ≤ x < 0.5. The crystal structure changes from orthorhombic (Fmmm) for x ≤ 0.1 to pseudo-tetragonal (I4/mmm) for x ≥ 0.2. The orthorhombic structure of x=0.1 transforms to tetragonal at low temperature. The bond distances obtained from the Rietvel analyses did not vary significantly with the Ba content except that of Ni-O (parallel to the c-axis) which showed an abrupt increase from x=0.1 to 0.2. The excess oxygen content (δ) decreases from 0.241 to 0.03 with increasing substituted Ba contents within the solution range. The samples are all semiconductors at the temperature range 4 < T < 300 K.

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참고문헌

  1. Mater. Res. Bull. v.25 Takeda, Y.;Kanno, R.;Sakano, M.;Yamamoto, M.;Takano, R.;Banndo, Y.;Akinaga, H.;Takita, K.;Goodenough, J. B.
  2. J. Solid State Chem. v.22 Gopalakrishinan, J.;Colsmann, G.;Reuter, B.
  3. J. Solid State Chem. v.51 Rao, C. N. R.;Buttrey, D. J.;Otsuka, N.;Ganguly, P.;Harrison, H. R.;Sandberg, C. T.;Honig, J. M.
  4. J. Solid State Chem. v.64 Buttrey, D. J.;Honig, J. M.;Rao, C. N. R.
  5. Z. Phys. B. v.64 Bednorz, J. G.;Muller, K. A.
  6. J. Solid State Chem. v.102 Granados, X.;Fontcuberta, J.;Valler-Regi, M.;Sayagues, M. J.;Gonzalez-Calbert, J. M.
  7. Mater. Res. Bull. v.24 Austin, A. B.;Carreiro, L. G.;Marzik, J. V.
  8. J. Solid State Chem. v.105 Chen, S. C.;Ramanujachary, K. V.
  9. In Chemistry of Electronic Ceramic Materials Arbuckle, B. W.;Zhang, Z.;Greenblatt, M.;Davis, P. K.(ed.);roth, R. S.(ed.)
  10. J. Solid State Chem. v.96 Takeda, Y.;Nishijima, M.;Imanishi, N.;Kanno, R.;Yamamoto, O.
  11. J. Solid State Chem. v.88 Arbuckle, B. W.;Ramanujachary, K. V.;Zhang, Z.;Greenblatt, M.
  12. J. Solid State Chem. v.105 James, M.;Attfield, J. P.
  13. Mater. Sci. Monogr. (React. Solu. Pt. A) v.28 Saez-Puche, R.;Fernandez, F.;Glaunsinger, W. S.
  14. Phys. Rev. B v.42 Buttrey, D. J.;Sullivan, J. D.;Shirane, G.;Yamada, K.
  15. J. Solid State Chem. v.105 Rice, D. E.;Buttrey, D. J.
  16. Acta Cryst. v.22 Rietveld, H. M.
  17. User's guide to programs DBWS-9006 and DBWS-9006PC for Rietveld analysis of X-ray and neutron powder diffraction patters Sakthivel, A.;Young, R. A.
  18. Reviews in Mineralogy v.20 Post, J. E.;Bish, D. L.
  19. J. Solid State Chem. v.103 DiCarlo, J.;Mehta, A.;Banschick, D.;Navrotsky, A.
  20. J. Am. Ceram. Soc. v.72 Yokokawa, H.;Kawada, T.;Dokiya, M.
  21. J. Solid State Chem v.94 Yokokawa, H.;Sakai, N.;Kawada, T.;Dokiya, M.
  22. An introduction to crystal chemistry(2nd ed) Evans, R. C.
  23. Phys. Rev. B v.40 Jorgensen, J. D.;Dabrowski, B.;Pei, S.;Richards, D. R.;Hinks, D. G.