液相沉淀法制备TiO₂超微粉末的影响因素分析

【摘要】 利用ＴｉＣｌ４溶液和（ＮＨ４）２ＣＯ３饱和液反应生成Ｔｉ（ＯＨ）４沉淀，经洗涤、过滤、干燥、煅烧后制得ＴｉＯ２超微粉末。根据成核生长的热力学和动力学原理，深入研究分析了共沉淀时温度、ｐＨ值、滴定速度和陈化时间对Ｔｉ（ＯＨ）４粒度的影响。研究结果表明，温度、ｐＨ值、滴定速度的影响较为突出，陈化时间的影响较小，煅烧温度对最终产品粒度和性能的影响是十分重要的，实验得出最优制备条件更多还原

【Abstract】 In this paper, the mathod of TiCl 4 solution reacting with (NH 4) 2CO 3 saturated solution is used to produce Ti(OH) 4 precipitate which can become TiO 2 UFP through washing、 filtrating、 drying、calcining process. The influences of temperature,pH value titrating speed and time of laying on grain size of products are studied in precipitating process. According to the thermodynamic and kinetic theory of nucleation and growth, the effect relations between four factors and grain size are deeply analysed. The influences of temperature, pH value, titrating speed are sensitive but time of laying is not. The calcining temperautre is a very important factor to grain size and properties of the final products. The best manufacturing conditions of Ti(OH) 4 preciptitate are also obtained in the experiment.更多还原