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| PREPARATION AND ELECTRICAL PROPERTIES OF Sc--DOPED CaZrO3 |
| LI Ying, DING Yushi, CUI Shaogang, WANG Changzhen |
| College of Materials and Metallurgy, Northeastern University, Shenyang 110819 |
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Cite this article:
LI Ying, DING Yushi, CUI Shaogang, WANG Changzhen. PREPARATION AND ELECTRICAL PROPERTIES OF Sc--DOPED CaZrO3. Acta Metall Sin, 2012, 48(5): 575-578.
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Abstract CaZrO3 solid state electrolyte displays proton conductivity and high chemical stability. The Sc doped CaZrO3 proton conductors were prepared by solid state reaction in order to improve the conductivity in this study. XRD analysis suggest that CaZr1-xScxO3-α(x=0, 0.1, 0.15) samples were synthesized completely. The electrochemical impedance spectra were applied to study the conductivities and the activation energy for proton diffusion of the CaZr1-xScxO3-α(x=0, 0.1, 0.15) in the temperature range of 610---850℃, and the electric conductivities of CaZr1-xScxO3-α were compared with those of CaZr1-xInxO3-α. The experiment results show that the electric conductivities of CaZrO3, CaZr0.9Sc0.1O3-α, CaZr0.85Sc0.15O3-α, CaZr0.9In0.1O3-α and CaZr0.85In0.15O3-α are 4.3×10-19---1.4×10-6 S/cm (610---850℃), 1.16×10-4---4.6×10-4 S/cm (690---850℃), 1.8×10-4---1.4×10-3 S/cm (610---850℃), 0.34×10-4---4.30×10-4 S/cm (741---847℃) and 0.57×10-4---4.33×10-4 S/cm (585---814℃), respectively. These conductivities results show that the conductivity of CaZrO3 proton conductor can be significantly improved by doping. The conductivities of CaZrO3 increase with the Sc doping content and temperature increasing. The results reveal that the conductivities of CaZr1-xScxO3-α are higher than those of CaZr1-xInxO3-α. Sc--doping is more beneficial for increasing the conductivity of CaZrO3 solid state electrolyte.
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Received: 09 December 2011
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| Fund: National Natural Science Foundation of China;National Natural Science Foundation of China |
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