Preparation of PbZrO3 Modified with Ti4+Anti-ferroelectric Nano-powder and Its Structure Identification

Ti4+ was selected to modify PbZrO3, and PZ and PZT (95/5) dried gel powder were prepared by a sol-gel method. XRD results show that the calcination temperature of PZ with single perovskite structure is 900 degrees C, while that for PZT (95/5) with single perovskite structure is 750 degrees C. SEM results indicate that PZ is sintered into ceramic after calcination at 900 degrees C and the grain boundary is obvious. However, the particle size of PZT(95/5) is about 150 nm after calcination at 750 degrees C. TEM and EDS reveal that PZT (95/5) nano-powder with single perovskite structure is antiferroelectric. DSC-TGA results illustrate that a large number of Ti4+ hydroxyl substances is formed due to the addition of Ti4+. And with the decomposition of Ti4+ hydroxyl substances, a large amount of heat is released, which is conducive to the crystallization of PZT(95/5).