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Preparation, structure and electrical conductivity of pyrochlore-type samarium–lanthanum zirconate ceramics
Highlights ► Dense Sm2– xLaxZr2O7 ceramics were prepared by pressureless-sintering at 1973K. ► Sm2– xLaxZr2O7 ceramics have a single phase of pyrochlore-type structure. ► The electrical conductivity of Sm2– xLaxZr2O7 increases with increasing temperature. ► Sm2– xLaxZr2O7 ceramics are oxide-ion conductors in low oxygen partial pressure. ► The electrical conductivity of Sm2– xLaxZr2O7 decreases with increasing La content.
Abstract A series of zirconate compounds with the general formula Sm2– xLaxZr2O7 (0⩽ x ⩽1.0) were prepared by pressureless-sintering method at 1973K for 10h in air. The relative density, structure and electrical conductivity of Sm2– xLaxZr2O7 ceramics were investigated by the Archimedes method, X-ray diffraction and impedance spectroscopy measurements. Sm2– xLaxZr2O7 (0⩽ x ⩽1.0) ceramics exhibit a pyrochlore-type structure. The measured electrical conductivity of Sm2– xLaxZr2O7 ceramics obeys the Arrhenius relation and gradually increases with increasing temperature from 673 to 1173K. Sm2– xLaxZr2O7 ceramics are oxide-ion conductors in the oxygen partial pressure range of 1.0×10−4 to 1.0atm at all test temperature levels. The electrical conductivity of Sm2– xLaxZr2O7 ceramics decreases with increasing lanthanum content at identical temperature levels.
Preparation, structure and electrical conductivity of pyrochlore-type samarium–lanthanum zirconate ceramics
Highlights ► Dense Sm2– xLaxZr2O7 ceramics were prepared by pressureless-sintering at 1973K. ► Sm2– xLaxZr2O7 ceramics have a single phase of pyrochlore-type structure. ► The electrical conductivity of Sm2– xLaxZr2O7 increases with increasing temperature. ► Sm2– xLaxZr2O7 ceramics are oxide-ion conductors in low oxygen partial pressure. ► The electrical conductivity of Sm2– xLaxZr2O7 decreases with increasing La content.
Abstract A series of zirconate compounds with the general formula Sm2– xLaxZr2O7 (0⩽ x ⩽1.0) were prepared by pressureless-sintering method at 1973K for 10h in air. The relative density, structure and electrical conductivity of Sm2– xLaxZr2O7 ceramics were investigated by the Archimedes method, X-ray diffraction and impedance spectroscopy measurements. Sm2– xLaxZr2O7 (0⩽ x ⩽1.0) ceramics exhibit a pyrochlore-type structure. The measured electrical conductivity of Sm2– xLaxZr2O7 ceramics obeys the Arrhenius relation and gradually increases with increasing temperature from 673 to 1173K. Sm2– xLaxZr2O7 ceramics are oxide-ion conductors in the oxygen partial pressure range of 1.0×10−4 to 1.0atm at all test temperature levels. The electrical conductivity of Sm2– xLaxZr2O7 ceramics decreases with increasing lanthanum content at identical temperature levels.
Preparation, structure and electrical conductivity of pyrochlore-type samarium–lanthanum zirconate ceramics
Liu, Zhan-Guo (author) / Ouyang, Jia-Hu (author) / Zhou, Yu (author) / Xiang, Jun (author) / Liu, Xiao-Ming (author)
2011-04-19
6 pages
Article (Journal)
Electronic Resource
English
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