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Effect of BiScO 3 and LiNbO 3 on the Piezoelectric Properties of (Na 0.5 K 0.5 )NbO 3 Ceramics
Author(s) -
Sun Xueyi,
Deng Jinxia,
Sun Ce,
Li Jichao,
Chen Jun,
Yu Ranbo,
Liu Guirong,
Xing Xianran,
Qiao Lijie
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.1551-2916.2009.03096.x
Subject(s) - materials science , curie temperature , tetragonal crystal system , potassium niobate , orthorhombic crystal system , piezoelectricity , ferroelectricity , sintering , mineralogy , natural bond orbital , ceramic , analytical chemistry (journal) , phase transition , solid solution , dielectric , phase (matter) , crystal structure , crystallography , condensed matter physics , composite material , chemistry , metallurgy , ferromagnetism , optoelectronics , density functional theory , physics , computational chemistry , organic chemistry , chromatography
Lead‐free potassium sodium niobate‐based piezoelectric ceramics (1− y )(Na 0.5−0.5 x K 0.5−0.5 x Li x )NbO 3 − y BiScO 3 ( y =0.01, x= 0–0.06) have been prepared by an ordinary sintering process. The XRD analysis showed that the structure changes from orthorhombic to tetragonal with the increase of x (at y =0.01, abbreviated as KNNBSL100 x ). At room temperature, the polymorphic phase transition from the orthorhombic to the tetragonal phase was identified at approximately 0.02≤ x ≤0.04. The piezoelectric and ferroelectric properties were significantly enhanced. The temperature dependences of the relative permittivity revealed that the Curie temperature was increased with the addition of LiNbO 3 . These solid solution ceramics are promising as potential lead‐free candidate materials.