The effects of Bi~(3+) addition on the sintering performance and microstructural evolution of Cordierite were analyzed in this paper. Cordierite powders were prepared by sol-gel processing. As nucleating agent, the Bi~(3+) additive was found to promote the phase transition from μ-cordierite to α-cordierite and decrease sintering temperatures. The effect of Bi~(3+) on the activation of cordierite can be attributed to the nucleation of cordierite. The doping of Bi~(3+) increased the expansion coefficient and dielectric constant. Too much Bi~(3+) will inhibit the cordierite crystallization and encourage anorthite crystallization.
展开▼
