摘要
采用TiCl4和BaCl2.2H2O原料,以正丁醇为分散剂,NH4HCO3和NH3.H2O作为沉淀剂合成钛酸钡前驱体,在900℃煅烧制备分散性良好的钛酸钡纳米粉体。利用XRD、透射电镜(TEM)和SEM等手段分析了反应温度、TiCl4浓度、分散剂掺杂量等反应参数对粉体的晶相组成、晶粒度、形貌等的影响,并且测试了相应陶瓷烧结体的介电常数。结果表明,反应温度为900℃,TiCl4浓度为0.6 mol/L,分散剂用量为3‰条件下,保温2 h可制备高分散性的纳米级粉体。用以上方法制备的粉体烧结而成的陶瓷片介电常数约为3 400。
In the paper, nanometer-sized BaTiO3 powders were prepared with inorganic salt, such as BaCl2· 2H2O and TiCl4 as raw materials, n-butanol as additives and NH4 HCO3 and NH3 · H2O used as precipitant. The structure and electrical properties of BaTiO3 were investigated by X-ray diffractometer （XRD）, transmission electron microscopy （TEM） and scanning electron microscopy （SEM） characterizations. The effects of technological parameters,such as ratio of raw materials, concentration of TiCl4, amount of additives, reaction temperature on the physical and chemical characteristics of the barium titanate were discussed. The result showed that the concentration of TICl4 was 0.6 mol/L,the amount of surfactants was 3‰ and the reaction temperature was 900℃. In these results, barium titanate powder could be produced in high dispersant. The electron parameter of Barium titanate powder was 3 400.
出处
《压电与声光》
CSCD
北大核心
2009年第4期528-530,534,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(50772051)
青岛科技大学科研启动基金资助项目
关键词
钛酸钡粉体
分散剂
共沉淀
barium titanate powder
additives
co-precipitation
