首页|IMPROVEMENT OF ELECTROMECHANICAL COUPLING FACTOR AND MECHANICAL QUALITY FACTOR IN PZT-PMN CERAMICS BY MnO_2 ADDITION
IMPROVEMENT OF ELECTROMECHANICAL COUPLING FACTOR AND MECHANICAL QUALITY FACTOR IN PZT-PMN CERAMICS BY MnO_2 ADDITION
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NETL
NSTL
Trans Tech Publications Ltd
PZT-PMN ceramic system with presence of MnO_2 contents were proposed and prepared using conventional sintering method as for piezoelectric transformer application. Phase formation and several dielectric and piezoelectric parameters were studied as a function of MnO_2 concentration. The x-ray diffraction study revealed the tetragonal symmetry for all samples with MnO_2 doping. To determine polarization, the P-E hysteresis loop were produced and the results indicated that entering of Mn~(4+) ions in the ceramic structure created large amount of oxygen vacancies and the consequent was observed as displacement of the loops to E axis. The obtained optimum parameter are d_(33) = 119 pC/N, k_p = 0.207, Q_m = 1669, tan δ = 0.0101, P_r = 20 μm/cm~2 and E_c = 10 kV/cm.
lead zirconate titanatelead magnesium niobatepiezoelectric properties and structural refinement
NETL
NSTL
Trans Tech Publications Ltd
