Premium
High permittivity (1− x )Bi 1/2 Na 1/2 TiO 3 ‐ x PbMg 1/3 Nb 2/3 O 3 ceramics for high‐temperature‐stable capacitors
Author(s) -
Hu Fanting,
Chen Xuefeng,
Peng Ping,
Cao Fei,
Dong Xianlin,
Wang Genshui
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15730
Subject(s) - materials science , dielectric , temperature coefficient , permittivity , perovskite (structure) , analytical chemistry (journal) , ceramic , ferroelectricity , ceramic capacitor , microstructure , relative permittivity , atmospheric temperature range , capacitor , phase (matter) , dielectric loss , mineralogy , composite material , chemistry , crystallography , optoelectronics , electrical engineering , thermodynamics , physics , organic chemistry , chromatography , voltage , engineering
(1− x )Bi 1/2 Na 1/2 TiO 3 ‐ x PbMg 1/3 Nb 2/3 O 3 [(1− x )BNT‐ x PMN] ceramics have been fabricated via a conventional solid‐state method for compositions x ≤ 0.3. The microstructure, phase structure, ferroelectric, and dielectric properties of ceramics were systematically studied as high‐temperature capacitor materials. XRD pattern certified perovskite phase with no secondary phase in all compositions. As PMN concentration increased, the phase of (1− x )BNT‐ x PMN ceramics transformed from ferroelectric to relaxor gradually at room temperature, with prominent enhancement of dielectric temperature stability. For the composition x = 0.2, the temperature coefficient of capacitance (TCC) was <15% in a wide temperature range from 56 to 350°C with high relative permittivity (>3300) and low dielectric loss (<0.02) at 150°C, which indicated promising future for (1− x )BNT‐ x PMN system as high‐temperature stable capacitor materials.