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New Insight on Sintering Progress of KNN ‐Based Lead‐Free Ceramics
Author(s) -
Zhang Yang,
Shen Bo,
Zhai Jiwei,
Zeng Huarong
Publication year - 2016
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.14072
Subject(s) - sintering , materials science , piezoelectricity , tetragonal crystal system , ceramic , orthorhombic crystal system , phase (matter) , phase transition , analytical chemistry (journal) , mineralogy , composite material , crystal structure , crystallography , chemistry , thermodynamics , chromatography , physics , organic chemistry
0.96(K 0.5 Na 0.5 ) 0.95 Li 0.05 Nb 0.93 Sb 0.07 O 3 –0.04CaZrO 3 (0.96 KNLNS –0.04 CZ ) lead‐free piezoelectric ceramics have been prepared by a new ceramics sintering progress—three‐step sintering method, via adjusting every step sintering temperature and holding time to improve piezoelectric properties. The result shows that the phase structure of the ceramics was changed from single phase to two phase coexisted by three‐step sintering, meanwhile, orthorhombic–tetragonal phase transition temperature was modified to around zero degree. Remarkably, piezoelectric properties has been obtained in 0.96 KNLNS ‐0.04 CZ ceramics, which piezoelectric parameter is d 33 = 420 pC /N, K p =0.485.