Electrical conduction in substituted scheelite-type oxides was studied by way of electrochemical method. Many substituted samples based on CaWO4, CaMoO4, BaWO4, etc. showed the mixed phase, where enhanced electrical conduction was not observed. High oxide ion conduction was observed in Pb1-xLaxWO4+x/2 or Pb1-xLa2x/3WO4 having the scheelite-type tetragonal structure. The maximum conductivity is 4.2 x 10(-2) S cm-1 at 800-degrees-C for Pb0.8La0.2WO4.1. The oxide ion conduction was considered to be due to the interstitial oxide ions formed by substitution of Pb2+ by La3+. These results are discussed in relation to the crystal phases.
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Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R ChinaChinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
Huang, HW
Feng, XQ
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机构:Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
Feng, XQ
Zhu, WL
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机构:Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
Zhu, WL
Zhang, Y
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机构:Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
Zhang, Y
Wen, TL
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机构:Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
Wen, TL
Tang, TB
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机构:Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
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Nagoya Univ, Dept Mat Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Kyoto 6068501, JapanNagoya Univ, Dept Mat Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
Toyoura, Kazuaki
Sakakibara, Yusuke
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Nagoya Univ, Dept Mat Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, JapanNagoya Univ, Dept Mat Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
Sakakibara, Yusuke
Yokoi, Tatsuya
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Nagoya Univ, Dept Mat Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, JapanNagoya Univ, Dept Mat Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
Yokoi, Tatsuya
Nakamura, Atsutomo
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Nagoya Univ, Dept Mat Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, JapanNagoya Univ, Dept Mat Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
Nakamura, Atsutomo
Matsunaga, Katsuyuki
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Nagoya Univ, Dept Mat Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
Japan Fine Ceram Ctr, Nanostruct Res Lab, Atsuta Ku, Nagoya, Aichi 4568587, JapanNagoya Univ, Dept Mat Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan