Abstract
The Pb[(Mg 1/3 Ta 2/3 ) 0.7 Ti 0.3 ]O₃+xwt%PbO systems at temperature of 1250℃ for 4 hours was successful synthesized. In this study, PbO-doped Pb[(Mg 1/3 Ta 2/3 ) 0.7 Ti 0.3 ]O₃ systems with non-linear behaviors showed ordering-degree dependence at the low temperature range were prepared using the columbite precursor method. And the characteristic of remnant polarization vs. electric field were analyzed. The pyroelectric, dielectric and piezoelectric properties of partially disordered Pb[(Mg 1/3 Ta 2/3 ) 0.7 Ti 0.3 ]O₃+xwt%PbO solid solutions were studied as a function of temperature, frequency, and electric field. It showed distinct features of temperature dependent of pyroelectric coefficient, spontaneous polarization and dielectric constant at about 50℃. The figure of merit was calculated as pyroelectric coefficient, dielectric constant and dissipation factor. It was found that the high voltage responsivity F V , high detectivity F D were 0.0373 ㎡/C and 0.6735×10 −4 Pa −1/2 , respectively, in the Pb[(Mg 1/3 Ta 2/3 ) 0.7 Ti 0.3 ]O₃+3.0 wt%PbO system.
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