水热合成技术的研究和应用──Ⅳ.钛酸锶晶体粉末的制备  

STUDY ON PREPARATION OF STRONTIUM TITANATE CRYSTALLINE POWDER BY HYDROTHERMAL PROCESSING TECHNIQUE

作　　者：胡嗣强[1] 黎少华[1] 

机构地区：[1]中国科学院化工冶金研究所,北京100080

出　　处：《化工冶金》1994年第4期316-321,共6页

摘　　要：本文以Sr（OH）2和TiO（OH）2作为水热合成SrTiO3晶体粉末的前驱物，讨论并选定制备前驱物的化工原料，并对水热合成SrTiO3晶体粉末的条件：KOH浓度、温度和时间进行了考察.结果表明150～200℃，1h均可有效合成．200℃下水热20～60min产物的X光衍射特征峰高无明显差别；水热介质中KOH浓度从0.1～1.0mol／L区域内对合成无大的影响；最后初步讨论了SrTiO3晶体粉末的合成机理并合理解释了实验结果.Strontium titanate crystalline powder was synthesized hydrothermally from precursors of Sr(OH)2 and TiO(OH)2. The raw materials to prepare the hydrothermal precursors were compared and discussed. The hydrothermal conditions including KOH concentration,temperature and time were investigated. The results showed that SrTiO3 can be formed in the temperature range of 150-200℃ for 1h. The strongest peak intensity of XRD spectra of hydrothermal products synthesized at 200℃ for 20 to 60min did not change obviously. The influence of KOH concentration in the hydrothermal medium was very small in the range of 0.1～1.0 mol/L. The hydrothermal synthesis mechanism for SrTiO3 was suggested and used to explain reasonably the experimental results.

关 键 词：钛酸锶 水热 合成 

分 类 号：TF123.71[冶金工程—粉末冶金] TF125.22[冶金工程—冶金物理化学]