The influence of doping style on the grain growth of BaTiO3 ceramics

Decrease the sintering temperature and doping with multiple functional impurities are necessary to develop the new ceramic electronic components. In this study, we used CdO as a dopant to lower sintering temperature of BaTiO3 with two doping styles: one is synthesis CdO into BaTiO3 to form compound as basic powder, another is adding CdO to the basic powder BaTiO3 before sintering as sintering aid. The different doping style resulted in very different effects. The grain size of the ceramics was controlled efficiently and the sintering was promoted greatly by the first doping style. On the contrary, the ceramic grain is much bigger and the sintering was not promoted efficiently by another doping style. Therefore, the style of doping is very important to the graingrowth controlling. The mechanism of these differences is also discussed.