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Title: Ferroelectric, piezoelectric, and dielectric properties of BiScO{sub 3}-PbTiO{sub 3}-Pb(Cd{sub 1/3}Nb{sub 2/3})O{sub 3} ternary high temperature piezoelectric ceramics

(0.95-x)BiScO{sub 3}-xPbTiO{sub 3}-0.05Pb(Cd{sub 1/3}Nb{sub 2/3})O{sub 3} (BS-xPT-PCN) high temperature piezoelectric ceramics near the morphotropic phase boundary (MPB) have been synthesized by traditional solid-state reaction methods. The microstructural morphology, phase structure, and electrical properties of BS-xPT-PCN ceramics were investigated in detail. X-ray diffraction analysis indicated BS-xPT-PCN ceramics have a pure perovskite structure. The coexistence of rhombohedral and tetragonal phases at MPB composition enhanced the polarizability by the coupling between two dynamically equivalent energy states, resulting in the improved piezoelectric and ferroelectric properties at MPB vicinity. The BS-xPT-PCN (x = 0.60) ceramics possess the optimal piezoelectric and ferroelectric properties with d{sub 33} = 505pC/N, k{sub p} = 55.9%, k{sub t} = 36.5%, strain = 0.23% (under the electric field 37.5 kV/cm), and P{sub r} = 39.7 {mu}C/cm{sup 2}. High temperature dielectric behaviors showed diffuse phase transition in BS-xPT-PCN ceramics. The Curie temperature T{sub c} was found to increase from 371 Degree-Sign C to 414 Degree-Sign C with x increasing from 0.58 to 0.62. All these results together with the good thermal stabilities make the BS-xPT-PCN ceramics promising candidates for high temperature piezoelectric applications.
Authors:
 [1] ;  [2] ; ;  [1] ;  [3] ;  [4]
  1. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871 (China)
  2. (China)
  3. School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100 (China)
  4. Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062 (China)
Publication Date:
OSTI Identifier:
22122810
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 2; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BISMUTH COMPOUNDS; CADMIUM COMPOUNDS; CERAMICS; CURIE POINT; DIELECTRIC PROPERTIES; ELECTRIC FIELDS; FERROELECTRIC MATERIALS; LEAD COMPOUNDS; MICROSTRUCTURE; NIOBIUM COMPOUNDS; OXYGEN COMPOUNDS; PEROVSKITE; PHASE TRANSFORMATIONS; PIEZOELECTRICITY; POLARIZABILITY; SCANDIUM COMPOUNDS; SOLIDS; TITANATES; TRIGONAL LATTICES; X-RAY DIFFRACTION