钛醇盐水解制取高纯TiO2微粉的研究
STUDY ON PREPARATION OF HIGH PURITY TiO2 HYDROLYSIS OF TITANIUM ALKOXIDES
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摘要: 介绍了钛醇盐的合成方法。在惰性溶剂中,以自制钛乙醇盐为原料,探讨了钛醇盐水解制取高纯TiO2微粉的方法。研究了反应物浓度、温度、水量、搅拌速度、分散剂以及干燥、锻烧等对TiO2粒子物性的影响规律,制备出纯度 ≥ 99.5%,粒径<1.0μm,近似球形的TiO2微粉。用其做成PTC电子元件,其电性能接近日本TDK同类产品的技术指标。Abstract: The synthesis method of titanium alkoxides has been introduced.In inert solvent,the process of preparation of TiO2 particles by hydrolysis of self-made titanium alkoxides is described.The effects of the concentration of reactants,the temperature, amount of water,the stirring rate,dispersants,the drying and the burning on particle properties were studied.The TiO2 powder has been prepared,whose purity is above 99.5 percent,particle size is below 1.0μm and form is similar to ball. This type of TiO2 powder has been made into PTC electronic componments,with performance up to the technic indices of TDK produced in Japan.
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Key words:
- titanla /
- titanium alkoxide /
- hydrolysis /
- high purity /
- ultrafine particles /
- simple-sized
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