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Research progress on the preparation method of strontium titanate At present, the main preparation methods of strontium titanate are: Sol-thermal method.
Sol-Sol Whether in metal materials or in organic and inorganic non-metallic materials, adding an appropriate amount of strontium and its compounds can change some of their properties or even make them have special functions, so it is called metal MSG. Among strontium resources, strontium titanate (SrTiO3) is one of the important compounds. Strontium titanate has superconductivity, semiconductivity, gas sensitivity, thermal sensitivity and photosensitivity, low dielectric loss, high dispersion frequency, and other advantages.
Compared with calcium materials, it has better temperature stability and high voltage resistance, so it is a widely used electronic ceramic material in the electronics industry. It can be used to manufacture grain boundary layer capacitors, TC thermistors, high-voltage capacitors, oxygen sensors, and capacitor-varistor composite functional components; using it to replace SiO2 in memory can increase the storage capacity by more than 30 times. Gel method, chemical precipitation method, high-temperature solid phase method, microwave method, plasma method and hydrogel method Gel method is a method for preparing SrTiO3 thin film. Generally, titanium salt and strontium salt are used as raw materials, and organic compounds are used as chelates to prepare homogeneous sol in organic solvents; after the gel is dried, it is calcined at low temperature (below 900°C) for several hours to obtain strontium titanate powder. Nano-SrTiO3 ceramic powder was synthesized by sol-gel process (ISG process) with TiC14.SrCl2.6H2O as raw materials.
The study shows that due to the complexation of citric acid and other factors, the sol is stable and the gel is evenly distributed. In the process of transformation of SrO_TiO2 composite oxide gel to crystalline phase, simple oxide without intermediate phase is generated. After treatment, the precursor SrO_TiO2 can directly generate a single cubic; in addition, oxygen sensitive elements are made for oxygen sensors to control lean combustion of automobiles, which has attracted wide attention from relevant personnel.
