采用溶胶-凝胶法,探索了合成纯相Na3Zr2Si2PO12的条件,XRD分析表明前驱体中Na和P均过量10％时,在1050℃下烧结得到了纯相的Na3Zr2Si2PO12,而P不过量时,得到的产物中含有少量的ZrO2杂质.电化学阻抗谱测试表明Na和P均过量10％时,烧结得到的陶瓷片室温离子电导率达到了5.4×104 S/cm,比P不过量时烧结得到样品的离子电导率(室温时为3.7×10-4 S/cm)要高.进一步分析可知高温下P的挥发造成ZrO2杂质相的析出,从而使得离子电导率降低.与固相法相比,溶胶-凝胶法需要的烧结温度更低,且制得的样品的离子传导性更好.
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