Ceramic samples of Li2+xYxZr1-xO3 w th x = 0, 0.01, 0.05, and 0.1 were prepared by conventional methods. The crystal structures and microstructures of the ceramic samples were studied using x-ray diffraction, infrared spectra, and scanning electron microscopy The results show that a solid solution of Li2+xYxZr1-xO3 was formed when x was not larger than 0. 05 and a second phase appeared in the solid solution when x was equal to 0.1. The sinterability of Li2ZrO3 improved greatly with addition of yttrium from 80.8% theoretical density (TD.) for the sample without yttrium to 94.6% T.D. for the sample with x = 0.05; the grain size decreased significantly with the formation of the solid solution. The total lithium ion conductivity increased slightly, from 3.9 x 10(-6) S/cm for pure Li2ZrO3 to 5.0 x 10(-6) S/cm for the sample with x = 0.05 at 400-degrees-C and the corresponding conduction activation energy decreased from 0.99 to 0.92 eV Based on the effective medium theory, the conductivity increase in the solid solution crystal was estimated to be 3% for x = 0.05 compared with the pure Li2ZrO3 crystal.
机构:
Japan Science and Technology Agency, PRESTO, Kawaguchi, Saitama, 332-0012
Materials Science Department, California Institute of Technology, Pasadena, CA 91125Japan Science and Technology Agency, PRESTO, Kawaguchi, Saitama, 332-0012
Yamazaki Y.
Blanc F.
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Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, Lensfield RoadJapan Science and Technology Agency, PRESTO, Kawaguchi, Saitama, 332-0012
Blanc F.
Okuyama Y.
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Materials Science Department, California Institute of Technology, Pasadena, CA 91125Japan Science and Technology Agency, PRESTO, Kawaguchi, Saitama, 332-0012
Okuyama Y.
Buannic L.
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Department of Chemistry, Stony Brook University, Stony BrookJapan Science and Technology Agency, PRESTO, Kawaguchi, Saitama, 332-0012
Buannic L.
Lucio-Vega J.C.
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Materials Science Department, California Institute of Technology, Pasadena, CA 91125Japan Science and Technology Agency, PRESTO, Kawaguchi, Saitama, 332-0012
Lucio-Vega J.C.
Grey C.P.
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机构:
Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, Lensfield Road
Department of Chemistry, Stony Brook University, Stony BrookJapan Science and Technology Agency, PRESTO, Kawaguchi, Saitama, 332-0012
Grey C.P.
Haile S.M.
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Materials Science Department, California Institute of Technology, Pasadena, CA 91125Japan Science and Technology Agency, PRESTO, Kawaguchi, Saitama, 332-0012
机构:
Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USAStanford Univ, Dept Mech Engn, Stanford, CA 94305 USA
Shim, Joon Hyung
Gur, Turgut M.
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Stanford Univ, Dept Mat Sci Engn, Stanford, CA 94305 USAStanford Univ, Dept Mech Engn, Stanford, CA 94305 USA
Gur, Turgut M.
Prinz, Fritz B.
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Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA
Stanford Univ, Dept Mat Sci Engn, Stanford, CA 94305 USAStanford Univ, Dept Mech Engn, Stanford, CA 94305 USA
机构:
Energy & Nucl Res Inst, Ctr Sci & Technol Mat, BR-05508900 Sao Paulo, SP, BrazilEnergy & Nucl Res Inst, Ctr Sci & Technol Mat, BR-05508900 Sao Paulo, SP, Brazil
Goncalves, M. D.
Muccillo, R.
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Energy & Nucl Res Inst, Ctr Sci & Technol Mat, BR-05508900 Sao Paulo, SP, BrazilEnergy & Nucl Res Inst, Ctr Sci & Technol Mat, BR-05508900 Sao Paulo, SP, Brazil