The effect of titania dopant on the performance of sodium-beta″-alumina

Xiaoling Wei; Hui Yang; Xiaodong Shen

The effect of titania dopant on the performance of sodium-beta″-alumina

Xiaoling Wei, Hui Yang, Xiaodong Shen

College of Materials Science and Engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The Na-β″-Al ₂O ₃ electrolyte materials with the relative density of 98% were synthesized by a solid state reaction route employing boehmite, Na ₂CO ₃, MgO as starting materials and TiO ₂ as additive and characterized by X-ray diffraction, SEM, bending strength testing and AC 4-probe method. The results show that TiO ₂ can promote the sintering performance of Na-β″-Al ₂O ₃ electrolyte effectively and the purities of β″ phases were all above 96% when the content of TiO ₂ ranging from 0.5%-2%. The obtained samples with TiO ₂ 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 TiO ₂ additives. The ionic conductivity increased compared with the plain sample due to the decreased boundary resistance of the material.

Original language	English
Pages (from-to)	597-601
Number of pages	5
Journal	Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research
Volume	25
Issue number	6
State	Published - Dec 2011

Keywords

Inorganic non-metallic materials
Na-β″-Al O
Solid electrolyte
Solid-state reaction
TiO

Cite this

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title = "The effect of titania dopant on the performance of sodium-beta″-alumina",

abstract = "The Na-β″-Al 2O 3 electrolyte materials with the relative density of 98% were synthesized by a solid state reaction route employing boehmite, Na 2CO 3, MgO as starting materials and TiO 2 as additive and characterized by X-ray diffraction, SEM, bending strength testing and AC 4-probe method. The results show that TiO 2 can promote the sintering performance of Na-β″-Al 2O 3 electrolyte effectively and the purities of β″ phases were all above 96% when the content of TiO 2 ranging from 0.5%-2%. The obtained samples with TiO 2 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 TiO 2 additives. The ionic conductivity increased compared with the plain sample due to the decreased boundary resistance of the material.",

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AU - Yang, Hui

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AB - The Na-β″-Al 2O 3 electrolyte materials with the relative density of 98% were synthesized by a solid state reaction route employing boehmite, Na 2CO 3, MgO as starting materials and TiO 2 as additive and characterized by X-ray diffraction, SEM, bending strength testing and AC 4-probe method. The results show that TiO 2 can promote the sintering performance of Na-β″-Al 2O 3 electrolyte effectively and the purities of β″ phases were all above 96% when the content of TiO 2 ranging from 0.5%-2%. The obtained samples with TiO 2 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 TiO 2 additives. The ionic conductivity increased compared with the plain sample due to the decreased boundary resistance of the material.

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KW - Solid electrolyte

KW - Solid-state reaction

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The effect of titania dopant on the performance of sodium-beta″-alumina

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