The electrical properties of antiferroelectric lead zirconate-ferroelectric lead zinc niobate ceramics with lanthanum

摘要

The electrical properties of antiferroelectric (AF) lead zirconate (PZ) with relaxor ferroelectric (FE) lead zinc niobate (PZN) are studied with reference to the field-induced phase transition near the morphotropic phase boundary. The Curie point decreased with increasing lanthanum addition up to 3 m/o, whereas for the AF-FE boundary it increased with increasing lanthanum. Above 4 m/o lanthanum, paraelectric and antiferroelectric regions were observed. The effects of lanthanum content and temperature on the dielectric, pyroelectric, and P-E hysteresis are reported.