Premium
Low‐temperature sintering and electrical properties of Sr 2 Nb 2 O 7 piezoceramics by CuO addition
Author(s) -
Chen Tao,
Liang Ruihong,
Jiang Kai,
Hu Zhigao,
Zhou Zhiyong,
Dong Xianlin
Publication year - 2017
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.14797
Subject(s) - sintering , materials science , raman spectroscopy , ceramic , perovskite (structure) , octahedron , phase (matter) , mineralogy , analytical chemistry (journal) , crystallography , crystal structure , metallurgy , chemistry , physics , organic chemistry , chromatography , optics
Effects of 0.5 wt% CuO addition on the sintering, structural and electrical properties of perovskite layer structured (PLS) Sr 2 Nb 2 O 7 ceramics prepared by solid‐state reaction method are investigated. The addition of CuO is beneficial to the liquid phase bridge formation at sintering process, leading to lower sintering temperature of 1180°C and larger bulk density up to 98%. Meanwhile, CuO modified Sr 2 Nb 2 O 7 ceramics show a remarkable d 33 of (1.1 ± 0.1) pC/N while still with a very high T c of (1340 ± 2)°C. Raman spectra indicate that the improvement of piezoelectricity could be attributed to the rotation and/or distortion of oxygen octahedron caused by possible Cu 2+ substitution at the A‐sites of Sr 2 Nb 2 O 7 .