首页|Effects of CO_2O_3 on the Piezoelectric Properties of Na_(0.5)Bi_(0.5)TiO_3 Lead-free Piezoelectric Ceramics
Effects of CO_2O_3 on the Piezoelectric Properties of Na_(0.5)Bi_(0.5)TiO_3 Lead-free Piezoelectric Ceramics
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NETL
NSTL
Trans Tech Publications Ltd
Lead-free piezoelectric ceramics Na_(0.5)Bi_(0.5)TiO_3+xmol%Co~(3+) (NBT-xC) were synthesized by conventional solid-state process. Effects of Co~(3+) addition on the phase structure, dielectric and piezoelectric properties of NBT-xC were investigated. The X-ray diffraction suggested that all specimens were rhombohedral perovskite structure. After a small addition of CO_2O_3, a dense microstructure with increased grains was developed. The doping with Co~(3+) enhanced mechanical quality factor Q_m significantly, whereas piezoelectric constant d_(33) and electromechanical coupling factor k_p decreased slightly with increasing amount of Co~(3+). For the ceramics with x=3, the electric properties become optimum, which are as follows: d_(33)=～70pC/N, k_p=～13%, Q_m=～934, tanδ=～0.02 (1kHz), respectively. These results indicate that the Co~(3+) ion was considered to replace Ti~(4+) ion and present "hard doping" effect.
NETL
NSTL
Trans Tech Publications Ltd
