Research progress of preparation methods of strontium titanate at present, the main preparation methods of strontium titanate are sol thermal method.
Sol-sol-whether in metallic materials, or in organic and inorganic non-metallic materials, adding appropriate amount of strontium and its compounds can change some of its properties and even make it have special functions, so it has the name of metal monosodium glutamate. Strontium titanate (SrT iO 3) is one of the important strontium compounds. Strontium titanate has the advantages of superconductivity, semi-conductivity, gas sensitivity, heat sensitivity and photosensitivity, low boundary loss, high dispersion frequency, high dielectric constant and low electrical loss.
Compared with calcium material, it has better temperature stability and high compressive strength. Therefore, it is a kind of electronic ceramic material widely used in the electronic industry. Replacing SiO 2 with it 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 to prepare SrT iO 3 thin films. Generally, using titanium salt and strontium salt as raw materials and organic compound as chelate, homogeneous sol is prepared in organic solvent. Strontium titanate powder can be prepared by drying the gel and roasting it at low temperature (below 900) for several hours. Nano SrT iO 3 ceramic powders were synthesized from T iC 14.srcl 2.6h 2O by sol-gel process (ISG process for short).
Studies have shown that due to the complexation of citric acid and other actions, the sol is stable and the gel is evenly distributed. In the transition process of SrO_T iO 2 composite oxide gel to crystalline phase, simple oxides without intermediate phase are generated. After treatment, the precursor SrO_T iO 2 can directly generate a single cubic . In addition, the oxygen sensor made of oxygen sensor is widely used to control the thin combustion of automobile.