Dielectric and piezoelectric properties of (Bi0.9Li0.10)(Sc0.90Ta0.10)O3PbTiO3high-temperature relaxor piezoelectric ceramics

✍ Scribed by Zhao, Yi ;Jiang, Yihang ;Zhu, Jianguo

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 278 KB
• Volume: 207
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200925192

✦ Synopsis

Abstract

(1 − x)(Bi~0.90~Li~0.10~)(Sc~0.90~Ta~0.10~)O~3~__x__PbTiO~3~ (BLSTPT__x__; x = 0.60–0.65) ceramics were prepared using the conventional mixed oxide method. X‐ray diffraction analysis revealed that BLSTPT__x__ has a pure perovskite structure. In the vicinity of the morphotropic phase boundary, which was observed in the compositional range 0.61 ≤ x ≤ 0.62 from phase structure measurements, the BLSTPT__x__ ceramics showed enhanced piezoelectric properties: piezoelectric constant d~33~ = 516 pC/N, planar electromechanical coupling factors k~p~ = 57%. The temperature of the permittivity maximum increased with increasing measurement frequency, over the range 302–313 °C, higher than that of conventional relaxor materials such as Pb(B~1~B~2~)O~3~PbTiO~3~ systems. The ceramics show relaxor ferroelectric features.