Journal of Inorganic Materials ›› 2020, Vol. 35 ›› Issue (12): 1380-1384.DOI: 10.15541/jim20200042

Special Issue: 功能材料论文精选(2020)

• RESEARCH LETTERS • Previous Articles     Next Articles

Dielectric, Ferroelectric and Piezoelectric Properties of Pb(In1/2Nb1/2)O3-Pb(Ni1/3Nb2/3)O3-PbTiO3 Ternary Ceramics Near Morphotropic Phase Boundary

GUO Lin1,2(),QIAO Xianji2,LI Xiuzhi2,LONG Xifa2,HE Chao2()   

  1. 1. College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350117, China
    2. Key Laboratory of Optoelectric Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
  • Received:2020-01-20 Published:2020-12-20 Online:2020-05-20
  • About author:GUO Lin(1995–), male, Master candidate. E-mail: guolin@fjirsm.ac.cn
  • Supported by:
    Science and Technology Project of Fujian Province(2018H0044);Science and Technology Project of Fujian Province(2019H0052)

Abstract:

Lead-based complex perovskite ferroelectric materials have been widely used as electromechanical sensors, actuators, and transducers. Among them, Pb(Ni1/3Nb2/3)O3-PbTiO3 (PNN-PT) based solid solution has been drawn much attentions of scientists for its excellent dielectric and piezoelectric properties near morphotropic phase boundary (MPB) region. However, the relatively high dielectric loss and low Curie temperature near MPB region limited its application in high temperature and high power devices. In this work, Pb(In1/2Nb1/2)O3 (PIN) was introduced into PNN-PT ceramics for improving their electrical properties and Curie temperature. The ternary ferroelectric ceramics Pb(In1/2Nb1/2)O3-Pb(Ni1/3Nb2/3)O3-PbTiO3 were successfully prepared by a two-step synthesis process. All samples exhibited pure perovskite phase without any secondary phase. The structure transferred from rhombohedral to tetragonal phase with increasing PT content. The MPB phase diagram of ternary system at room temperature was established based on XRD results. The values of Curie temperature were improved significantly after PIN added into PNN-PT system. Importantly, the introduction of PIN into PNN-PT system can effectively reduce dielectric loss and conductivity. The ceramics in the MPB region exhibited excellent properties. 0.30PIN-0.33PNN-0.37PT ceramic was found to have optimal properties with d33=417 pC/N, TC=200 ℃, ε′= 3206, tanδ=0.033, Pr=33.5 μC/cm2 and Ec=14.1 kV/cm at room temperature, respectively. The Curie temperature and piezoelectric coefficient were improved while dielectric loss and conductivity were reduced after the introduction of PIN into PNN-PT. The enhancements of piezoelectric properties and high Curie temperature make this ternary system a promising material for high power and high temperature transducer applications.

Key words: ferroelectric ceramics, morphotropic phase boundary, Curie temperature, piezoelectric properties

CLC Number: