Effect of Mn2O3 Addition on the Electric and Physical Properties of Lead-Free 0.98(Na0.5Bi0.5)TiO3-0.02 Ba(Sn0.08Ti0.92)O3 Piezoelectric Ceramics

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In this paper, the effect of Mn2O3 additions on the electrical and physical properties of 0.98(Na0.5Bi0.5)TiO3 -0.02Ba(Sn0.08Ti0.92)O3 was investigated. X-ray diffraction analysis revealed that, during sintering, all of the Ba(Sn,Ti)O3 diffuse into the lattice of (Na0.5Bi0.5)TiO3 to form a solid solution, in which a hexagonal phase with a perovskite structure was found. The 0.98(Na0.5Bi0.5)TiO3 -0.02Ba(Sn0.08Ti0.92)O3 [0.98NBT-0.02BST] ceramics with the addition of 0~4.0 wt% Mn2O3 have been prepared following the conventional mixed oxide process. For 0.98NBT-0.02BST ceramics by doping 1.0 wt% Mn2O3, the electromechanical coupling coefficients of the planar mode kp and the thickness mode kt reach 0.12 and 0.52, respectively, at the sintering of 1100 oC for 3 h. The 0.98NBT-0.02BST ceramic with 1 wt% Mn2O3 addition exhibit a more homogeneous and grain size of ~3.5 μm. With suitable Mn2O3 doping, a dense microstructure and good piezoelectric properties were obtained.

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Periodical:

Key Engineering Materials (Volumes 434-435)

Edited by:

Wei Pan and Jianghong Gong

Pages:

409-412

DOI:

10.4028/www.scientific.net/KEM.434-435.409

Citation:

C. H. Wang "Effect of Mn2O3 Addition on the Electric and Physical Properties of Lead-Free 0.98(Na0.5Bi0.5)TiO3-0.02 Ba(Sn0.08Ti0.92)O3 Piezoelectric Ceramics", Key Engineering Materials, Vols. 434-435, pp. 409-412, 2010

Online since:

March 2010

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$35.00

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