柠檬酸盐溶胶凝胶法低温合成KBT粉体Citrate sol-gel synthesis of K0.5Bi0.5TiO3 powders at low temperature
田雪粉,王静,尹成,孟祥才
摘要(Abstract)：
以Ti Cl4、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DSCTG、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Ti Cl4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2 h合成了单相的片状K0.5Bi0.5TiO3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。
关键词(KeyWords)： 纳米KBT粉体;柠檬酸盐溶胶-凝胶法;低温制备;结构形貌
基金项目(Foundation): 国家自然科学基金(31100687);; 黑龙江省科技创新团队(2012TD010);; 佳木斯大学研究生科技创新项目(LZZ2014-015)
作者(Author): 田雪粉,王静,尹成,孟祥才
DOI: 10.13289/j.issn.1009-6264.2014.s2.001
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