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以正硅酸乙酯和五水硝酸铋为原料,采用化学溶液分解法制备Bi4Si3O12粉体。用X射线衍射仪和扫描电子显微镜分析了粉体的相结构和形貌,研究了正硅酸乙酯的用量对粉体相组成的影响。结果表明,前驱物粉体在650℃下煅烧1小时,得到了单一的Bi4Si3O12的粉体;颗粒大小为3～5μm,由若干个大小为300～500nm的晶粒组成为多孔的网状结构;当铋硅比(摩尔比)的用量为1∶2时,可以制备出相组成完全为Bi4Si3O12的粉体。
Using tetraethyl orthosilicate and bismuth nitrate pentahydrate as raw materials, a Bi4Si3O12 powder was prepared by chemical solution decomposition. The phase structure and morphology of the powders were analyzed by X-ray diffraction and scanning electron microscopy. The effects of the amount of TEOS on the phase composition of the powders were investigated. The results show that the precursor powder is calcined at 650 ℃ for 1 hour to obtain a single powder of Bi4Si3O12 with a grain size of 3 to 5 μm and a plurality of crystal grains with a size of 300 to 500 nm forming a porous network structure. When the ratio of bismuth to silicon (molar ratio) is 1: 2, a powder with a pure phase composition of Bi 4 Si 3 O 12 can be prepared.