High energy storage density performance of Ba, Sr-modified lead lanthanum zirconate titanate stannate antiferroelectric ceramics

• Published in: Materials research bulletin 2013-10, Vol.48 (10), p.3847-3849
• Main Authors: Wang, Jinfei, Yang, Tongqing, Chen, Shengchen, Li, Gang
• Format: Article
• Language: English
• Subjects: A. Ceramics; BARIUM ADDITIONS; BREAKDOWN; C. X-ray diffraction; CERAMICS; CURIE POINT; D. Dielectric properties; DENSITY; DOMAIN STRUCTURE; DOPED MATERIALS; ELECTRIC FIELDS; ENERGY DENSITY; ENERGY STORAGE; FERROELECTRIC MATERIALS; HYSTERESIS; MATERIALS SCIENCE; ORTHORHOMBIC LATTICES; PERMITTIVITY; PEROVSKITE; PLZT; POLARIZATION; STRONTIUM ADDITIONS; X-RAY DIFFRACTION
• ISSN: 0025-5408; 1873-4227
• DOI: 10.1016/j.materresbull.2013.05.083

Polarization hysteresis (P–E) loops of the (Pb0.85Ba0.08Sr0.03La0.03) (Zr0.74Sn0.22Ti0.04) samples: (a) measured at different applied electric-field and (b) measured at different temperatures is shown. It is typical antiferroelectrics whose remnant polarization is zero. As the remnant polarization of AFE is small and the ceramics are accompanied by the formation of the anti-parallel domain structure, energy stored in PLZST can be effectively released. Thus we calculated the energy density from the P–E loop and obtained the power density was up to 1.2J/cm3 at 55°C, and at 45°C the energy density was ∼1.24J/cm3. As usual, for bulk ceramics, the switching between the AFE and FE states occurs at lower field. This value is much higher than that reported previously for the PLZT bulk ceramic (0.4J/cm3). •Ba2+, Sr2+ co-doping caused the Tc of PLZST moved to the lower temperature (Tc≈40°C).•The ΔE was so smaller, EAF≈90kV/cm and EFA≈85kV/cm.•Ba, Sr co-doped PLZST ceramic exhibited slanted P–E loops with a large breakdown field (100kV/cm).•A high energy density was up to 1.2J/cm3. (Pb0.85Ba0.08Sr0.03La0.03)(Zr0.74Sn0.22Ti0.04) (Ba, Sr co-doped PLZST) co-doping antiferroelectric (AFE) ceramics with orthorhombic perovskite structure were prepared by the traditional solid state reaction process. It was observed that the doping of barium and strontium caused the Curie temperature of PLZST move to the lower temperature (Tc≈40°C). Ba, Sr co-doped PLZST AFE ceramics exhibited excellent electrical properties, the AFE to ferroelectric (FE) transition occurred at field EAF≈90kV/cm, and the transition from FE to AFE occurred at EFA≈85kV/cm. The maximum relative permittivity was about 4800, occurring at a field near the AFE to FE transition point, with a dielectric loss of 0.006. The samples exhibited small ΔE and slanted hysteresis loops with a large breakdown field of 100kV/cm due to Ba, Sr co-doping ceramics, and a high energy density of 1.2J/cm3.