分步沉淀法合成单分散超细钛酸锶晶粒

摘要/Abstract

摘要： 用四氯化钛和氯化锶为原料、尿素和氢氧化钠为沉淀剂,采用分步沉淀法在低温下合成了高纯、超细、单分散性好的晶态钛酸锶粒子.讨论了沉淀剂种类对粒子形成过程及粉末性能的影响.结果表明,沉淀初期尿素作沉淀剂,有利于粒子球形化和单分散性；氢氧化钠为沉淀剂与Sr-TiO₃粒子晶化和提高收率关系密切.该粉末平均粒径小于30um,Sr/Ti比可控、烧结活性高.

关键词: 钛酸锶, 超细粉体, 单分散粒子, 分步沉淀

Abstract: The highly pure、superfine and monosize-distribution strontium titanate crys- talline particles have been synthesized by fractional precipitation, when titanium tetrachlo-ride and strontium chloride were used as raw materials and urea and sodium hydroxide asprecipitation agents.The influences of the precipitation agents on formation of the particlesand properties of the powders have been discussed.The results show that urea as the firstprecipitation agent improves the sphericity of the particles and monosize-distribution.Sodi-um hydroxide as precipitation agent is favarable to the crystallization and yield of strontiumtitanate- Particle sizes down to 30 nm on average were obtained.The powders show a goodsinterability.

Key words: strontium titanate, superfine powder, monodispersed particle, fractional precipitation

徐明霞, 余侃, 杨义敏, 徐廷献. 分步沉淀法合成单分散超细钛酸锶晶粒[J]. 应用化学, 1998, 0(1): 37-40.

Xu Mingxia, Yu Kan, Yang Yimin, Xu Tingxian. Synthesis of Monodispersed Superfine SrTiO₃ Particles by Fractional Precipitation[J]. Chinese Journal of Applied Chemistry, 1998, 0(1): 37-40.

[1]	徐兵, 赵惠忠, 贺中央. 前躯体-喷雾干燥法制备氧化铝超细粉体[J]. 应用化学, 2010, 27(08): 983-986.
[2]	程继贵, 熊二涛, 蒋阳, 夏永红, 吴玉程. WS2 超细粉体的固相法合成[J]. 应用化学, 2006, 23(7): 786-789.
[3]	汪成建, 徐明霞, 施加婉君, 鄂磊, 徐永韬. SnO2的复合方式对TiO2晶型转变的影响[J]. 应用化学, 2003, 20(11): 1096-1098.
[4]	唐康泰, 杨治中, 付英毅, 刘雪宁, 区晖. 苯乙烯和甲基丙烯酸环氧丙酯共聚物单分散粒子的合成[J]. 应用化学, 1999, 16(6): 74-76.