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以分析纯的Bi(NO3)3·5H2O,ZnO和Nb2O5为初始原料,KOH为矿化剂,采用水热法合成立方焦绿石结构的Bi1.5ZnNb1.5O7纳米粉体.通过XRD分析其物相组成,TEM分析其形貌和尺寸,Scherrer公式计算其晶粒的大小.结果表明,在KOH浓度为1.8mol/L,温度为180~220 ℃反应6~48 h,可以合成立方焦绿石结构的Bi1.5ZnNb1.5O7纳米粉体,粉体颗粒尺寸约30~50 nm,形貌呈较为规则的颗粒状.合成温度和反应时间对合成粉体的物相和粒径都有一定的影响,并讨论了水热法合成Bi1.5ZnNb1.5O7纳米粉体的机理.

参考文献

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