以TiCl4、Bi(NO3)3和K2CO3为原料采用柠檬酸盐溶胶-凝胶法低温烧结制备了纳米钛酸铋钾(KBT)粉体.利用DSC-TG、XRD、SEM、TEM分别对KBT粉体的形成过程、物相结构及晶粒尺寸进行表征.研究并讨论了TiCl4浓度、煅烧温度、柠檬酸盐量等对KBT粉体结构的影响.结果表明,TiCl4浓度为1.5 mol/L时,700℃煅烧2h合成了单相的片状K05Bi05TiO3纳米粉体,粉体颗粒边长大约在100 ～ 300 nm,厚度为20 ～ 50 nm;与固相法相比,烧结温度降低了300℃;与未添加柠檬酸盐的KBT相比,柠檬酸盐改性后的KBT粒子具有良好的分散性,且能有效抑制晶粒长大.
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