Quantitative Calculation of Spontaneous Polarization during the FRL-FRH Transition of PZT Ceramics
PZT陶瓷FRL-FRH相变自发极化的定量计算

In view of the pyroelectric performance of PZT95/5 ceramics during the FRL-FRH transition, an analytic formula of spontaneous polarization varying with the temperature during the phase transition was established. According to Leibniz theorem of stagger progression, a sum can be extracted from the progression function in the formula in accordance with actually required accuracy. The curves of spontaneous polarization vs temperature for PZT95/5 ceramics during the FRL-FRH transition were simulated by means of the computer. The simulated curves fitted well with the experimentally measured curves. The result testified that the variation of spontaneous polarization during the phase transition can be described quantitatively and gives the theoretical significance to investigate deeply the phase transition performance of ferroelectric materials.