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Study of Lead Magnesium Niobate–Lead Titanate Ceramics for Piezo-Actuator Applications

2004; Institute of Physics; Volume: 43; Issue: 4R Linguagem: Inglês

10.1143/jjap.43.1501

1347-4065

Pawan Kumar, Sarabjit Singh, O. P. Thakur, Chandra Prakash, Tara C. Goel,

Multiferroics and related materials

Structural, dielectric, ferroelectric and piezoelectric properties of lead magnesium niobate–lead titanate, PMN–PT (66:34), prepared at different sintering temperatures (1150–1250°C) are discussed for actuator applications. System sintered at 1200 and 1250°C showed better perovskite phase stabilization and higher values of dielectric constant ( ε r ). Remnant polarization ( P r ) was found to be higher (45 µC/cm 2 ) for the system sintered at 1250°C. The piezoelectric coefficients, d 33 , d 31 , d h and strain induced in the system by a large electric field were found to be sintering temperature dependent. Hysteresis free strain behavior of the system sintered at 1200°C showed the suitability of this material for actuator applications.