矿化剂对水热合成钛酸铋纳米粉体的影响  

Effect of mineralizer on preparation of bismuth titanate nanopowder by hydrothermal method

作　　者：夏傲[1] 李永强[1] 苗鸿雁[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710000

出　　处：《无机盐工业》2009年第2期14-15,22,共3页Inorganic Chemicals Industry

基　　金：国家自然科学基金项目(50672055);(50872077);国家科技支撑计划项目(2006BAF02A28)

摘　　要：以分析纯五水合硝酸铋和四氯化钛为原料配制前驱物，调节pH为8～9，用水热法制备钛酸铋纳米粉体，以XRD分析了不同矿化剂的种类和浓度对钛酸铋粉体物相组成的影响。结果表明：以氢氧化钾为矿化剂比氨水利于钛酸铋晶相的形成，当矿化剂氢氧化钾的浓度为1．0～2．0mol／L时，可以生成单一的正交相钛酸铋纳米粉体，而以氨水为矿化剂得不到钛酸铋物相。以TEM和SEM观察了钛酸铋纳米粉体的微观形貌。TEM结果表明：钛酸铋品粒的宽度在30nm左右，长度大于100nm。SEM测试表明粉体颗粒之间有一定的团聚。Precursor was obtained from raw materials of bismuth nitrate and titanic chloride at analytical pure level. Then bismuth titanate nanopowders were prepared through hydrothermal method by adjusting pH at 8 - 9. Effeet of different types and concentrations of mineralizer on the phase composition of bismuth titanate nanopowders was analyzed by XRD. Results showed that compared with ammonia,potassium hydroxide is a better mineralizer for forming bismuth titanate crystal phase. Pure orthogonal bismuth titanate powder was obtained when the concentration of potassium hydroxide was from 1.0 mol/L to 2.0 mol/L. Whereas,bismuth titanate phase could not form with ammonia as mineralizer. TEM and SEM were used to observe morphology of the powder. TEM result showed that the width and length of bismuth titanate crystals were 30 nm and 100 nm,respectively. Besides SEM result showed that bismuth titanate crystals aggregated to some degree.

关 键 词：钛酸铋 水热合成 矿化剂 

分 类 号：TQ135.32[化学工程—无机化工]