A study on Bi4Ti3O12-doped sintered at medium temperature (Ba,Sr)TiO3 series capacitor ceramics

作者：Gao Chunhua^*; Huang Xinyou; Chen Zhigang; Chen Xiangchong; Huang Guojun

来源：Rare Metal Materials and Engineering, 2006, 35(SUPPL. 2): 213-215.

The influence of doping amount of Bi4Ti3O12 (more than 8%, mass fraction) on the properties of (Ba,Sr)TiO3(barium strontium titanate, BST) series ferroelectric capacitor ceramics were investigated, and the relationship between the additive amount of Bi4Ti3O12 and the properties of BST were obtained. The multilayer ceramics sintered at 1150°C were obtained, the withstand voltage of the ceramics was more than 6.99 MV/m, the dielectric loss was 0.008 and the dielectric temperature property was suited for X7R character. The influence of additive amount of Bi4Ti3O12 on the microstructure of BST ceramics were studied by scanning electron microscope(SEM). The influence mechanism of Bi4Ti3O12 additive amount on the properties of the BST ceramics was discussed. The results show that Bi4Ti3O12 additive has an influence on the properties and structure of BST ceramics due to forming "Core-Shell " structure, forming glass phase, segregating in crystal boundary, stopping grain growth, improving dielectric temperature property, and so on. These results provide the basis for Bi4Ti3O12 additive modifying BST series capacitor ceramics.

• 出版日期2006