INFLUENCE OF NONSTOICHIOMETRY AND DOPING ON ELECTRICAL PROPERTIES OF (Na1/2Bi1/2)0.92Ba0.08TiO3 CERAMICS

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Abstract
Influence of nonstoichiometry and doping on piezoelectric properties and depolarization temperature of lead-free piezoelectric ceramics (Na1/2Bi1/2)0.92Ba0.08TiO3 was studied. Nonstoichiometry of A-site can improve their piezoelectric properties. Doping in B-site has great influence on electric properties, which is similar to the corresponding rules of Pb(Ti,Zr)O3-based ceramics. Variation of coupling effect of A-site cation on BO6 octahedra as results of nonstoichiometry, and the doping in NBBT ceramics leads to variations of the depolarization temperature. The higher the depolarization temperature of Na1/2Bi1/2 TiO3-BaTiO3 ceramics studied,the lower the piezoelectric constant.

Keywords:
lead-free piezoelectric ceramics/

nonstoichiometry/

doping/

electrical properties
Authors and contacts
CHU BAO-JIN,

LI GUO-RONG,

YIN QING-RUI,

ZHANG WANG-ZHONG,

CHEN DA-REN

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Vol. 50, Issue 10 - 2001-05-20

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