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Piezoelectric Properties of (1− x )(Na 0.5 K 0.5 )NbO 3 – x AgSbO 3 Lead‐Free Ceramics
Author(s) -
Wang Yuanyu,
Liu Qibin,
Wu Jiagang,
Xiao Dingquan,
Zhu Jianguo
Publication year - 2009
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/j.1551-2916.2009.02935.x
Subject(s) - natural bond orbital , piezoelectricity , ceramic , materials science , curie temperature , sintering , orthorhombic crystal system , phase (matter) , mineralogy , analytical chemistry (journal) , crystal structure , crystallography , composite material , chemistry , condensed matter physics , density functional theory , computational chemistry , physics , organic chemistry , chromatography , ferromagnetism
(1− x )(Na 0.5 K 0.5 )NbO 3 – x AgSbO 3 lead‐free piezoelectric ceramics were prepared by normal sintering. The effects of the AgSbO 3 on the phase structure and piezoelectric properties of the ceramics were systematically studied. These results show that the AgSbO 3 ‐modified (K 0.50 Na 0.50 )NbO 3 lead‐free piezoelectric ceramics form stable solution with orthorhombic structure, and the Curie temperature and the polymorphic phase transition of the ceramics decreased with increasing AgSbO 3 . The result shows that the piezoelectric properties of the ceramics strongly depend on the AgSbO 3 . The ceramics with x =0.05 possess optimum properties ( d 33 =192 pC/N, k p =43%, T c =348°C, T o−t =145°C, ɛ r ∼632, and tan δ∼3.5%). These results indicate that the ceramic is a promising candidate material for lead‐free piezoelectric ceramics.