PYROELECTRICITY OF TEMPERATURE-INDUCED PHASE TRANSITION IN TIN-MODIFIED LEAD ZIRCONATE TITANATE
改性锆钛酸铅温度诱导相变的热释电性

The pyroelectricity of Pb 0.99 Nb 0.02 (Zr 1- x Sn x ) 1- y Ti y ] 0.98 O 3 antiferroelectric and ferroelectric ceramics is investigated. Experimental results show that phase transitions are accompanied with drastic electric current changes and form positive or negative pyroelectric peaks. The transformations from ferroelectric into antiferro or paraelectric phases make positive pyroelectric peaks, and the transformations from antiferroelectric into ferro or paraelectric phases make negative pyroelectric peaks. Suppose electrostatic potentials of various phases are different, then the relation between the orientation of pyroelectric peak and the type of phase transition could be explained properly. With the above relation the phase transitions with temperature variations in Pb(Zr,Ti)O 3 antiferroelectric ferroelectric materials can be defined.