摘要
以水热合成的一维γ-AlOOH为原料,采用固相反应法制备了具有高Na-β"-Al_2O_3相相含量的电解质材料,研究了前驱体形貌及烧结制度对Na-β"-Al_2O_3材料的影响。结果表明:γ-AlOOH经预烧后的产物形貌为一维棒状形貌,良好的拓扑继承γ-AlOOH前驱体的一维形貌,经高温固相反应形成Na-β"-Al_2O_3相后无法进一步继承前驱体的一维结构,得到具有层片状结构的Na-β"-Al_2O_3材料。预烧可以提高β"-Al_2O_3相含量,当预烧温度为1 100℃时,β"-Al_2O_3相含量达95.7%,300℃时的电导率为0.017 S?cm~(–1)。
The solid electrolyte material with a high Na-β"-Al_2O_3 phase content was prepared by a solid-state reaction method with one-dimensionalγ-AlOOH as a raw material.The effects of precursor morphology and sintering regime on the Na-β"-Al_2O_3 materials were investigated.The results show thatγ-AlOOH pre-sintered at different temperatures can topologically inherit the one-dimensional rod morphology of the precursor.Na-β"-Al_2O_3 powder synthesized by solid-state reaction cannot further inherit the one-dimensional morphology of the precursor.It is found that plate-like structures are obtained in all the Na-β"-Al_2O_3 materials.The calcination ofγ-Al OOH can increase the content ofβ"-Al_2O_3 phase.The content ofβ"-Al_2O_3 phase is 95.7%,and the conductivity at300℃is 0.017 S·cm~(–1) when the calcination temperature is 1 100℃.
引文
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