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| The Effect of Titania Dopant on the Performance of Sodium-beta''–alumina |
| WEI Xiaoling, YANG Hui, SHEN Xiaodong |
| College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009 |
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Cite this article:
WEI Xiaoling YANG Hui SHEN Xiaodong. The Effect of Titania Dopant on the Performance of Sodium-beta''–alumina. Chin J Mater Res, 2011, 25(6): 597-601.
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Abstract The Na–β''–Al2O3 electrolyte materials with the relative density of 98% were synthesized by a solid state reaction route employing boehmite Na2CO3 MgO as starting materials and TiO2 as additive and characterized by X-ray diffraction, SEM, bending strength testing and AC 4-probe method. The results show that TiO2 can promote the sintering performance of Na–β''–Al2O3 electrolyte effectively and the purities of β phases were all above 96% when the content of TiO2 ranging from 0.5%–2%. The obtained samples with TiO2 dopants comprised of compact and plump grains exhibiting high density with uniform microstructure. The bending strength of the specimen was enhanced obviously with the increase of the TiO2 additives. The ionic conductivity increased compared with the plain sample due to the decreased boundary resistance of the material.
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Received: 27 July 2010
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| Fund: Supported by National Key Basic Research Program of China No.2007CB209704 and the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions. |
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