Thermal decomposition reaction mechanism of the precursor gel made by sol gel process for nano crystalline BaTiO3 was studied by TG DTG and FTIR techniques.The reaction proceeded in three stages:solvents removing,orga...Thermal decomposition reaction mechanism of the precursor gel made by sol gel process for nano crystalline BaTiO3 was studied by TG DTG and FTIR techniques.The reaction proceeded in three stages:solvents removing,organic ligands decomposing,and amorphous solid BaTiO3 forming.The differential and intergral mechanism functions and activation energy for the third stage were obtained by calculation and comparson.展开更多
Nanocrystalline BaTiO 3 powder was prepared by sol gel process from tetrabutyltitanium and hydrated barium hydroxide. The thermal decomposition reaction of the obtained gel has been studied by TG DTA and FTIR techniqu...Nanocrystalline BaTiO 3 powder was prepared by sol gel process from tetrabutyltitanium and hydrated barium hydroxide. The thermal decomposition reaction of the obtained gel has been studied by TG DTA and FTIR techniques. The nano powder had particle size of about 50 nm and was of cubic perovskite structure. The ceramics made from BaTiO 3 nano powder still maintained nano scale microstructure with size of about 80～150 nm after sintering at 1190～1330 ℃.展开更多
文摘Thermal decomposition reaction mechanism of the precursor gel made by sol gel process for nano crystalline BaTiO3 was studied by TG DTG and FTIR techniques.The reaction proceeded in three stages:solvents removing,organic ligands decomposing,and amorphous solid BaTiO3 forming.The differential and intergral mechanism functions and activation energy for the third stage were obtained by calculation and comparson.
文摘Nanocrystalline BaTiO 3 powder was prepared by sol gel process from tetrabutyltitanium and hydrated barium hydroxide. The thermal decomposition reaction of the obtained gel has been studied by TG DTA and FTIR techniques. The nano powder had particle size of about 50 nm and was of cubic perovskite structure. The ceramics made from BaTiO 3 nano powder still maintained nano scale microstructure with size of about 80～150 nm after sintering at 1190～1330 ℃.
