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Highly dense 0.3CaCeNbWO 8 ‐0.7LaMnO 3 composite ceramics fabricated by cold sintering process
Author(s) -
Fu Zhilong,
Liu Yafei,
Zhang Bo,
Chang Aimin
Publication year - 2020
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.17353
Subject(s) - sintering , materials science , ceramic , composite number , microstructure , composite material , tetragonal crystal system , relative density , temperature coefficient , orthorhombic crystal system , phase (matter) , perovskite (structure) , crystal structure , crystallography , chemistry , organic chemistry
The cold sintering process (CSP) has been used for fabricating functional ceramics at a low sintering temperature. In this study, highly dense 0.3CaCeNbWO 8 ‐0.7LaMnO 3 composite ceramics have been successfully fabricated by CSP. The phase structure, microstructure, and electrical properties of composite ceramics have been investigated. The composite ceramic is mainly composed of a tetragonal CaCeNbWO 8 phase with scheelite structure and an orthorhombic LaMnO 3 phase with perovskite structure. The relative density of composite ceramic is 94.5%, and is higher than that of single phase ceramic. The resistivity of composite ceramic exhibits negative temperature coefficient characteristics, with an aging coefficient less than 2%. Such a sintering methodology is of great significance, since it provides a feasible idea for preparing composite ceramics.