Abstract
The relaxor ferroelectric ceramics of La doped xPb(Mg1/3Nb2/3)O3-(1 − x)Pb(Zr0.55Ti0.45)O3 are synthesized by columbite precursor method. Powder X-ray diffraction patterns of these compositions indicate pseudocubic phase formation. Grain growth is inhibited with La doping and is increased with PMN concentration in PMN-PZT ceramics. and tan δ are increased to 1.5 mole% La doped PMN-PZT compositions while and TC are decreased with La modification in PMN-PZT system. Pure and La modified 0.8PMN-0.2PZT compositions have shown the most promising relaxor behavior useful for multilayer capacitor (MLC) applications. The ferroelectric properties (Ec, Pr and Ps) are increased to 1.5 mole% La doped PMN-PZT composition. 77.84.Dy Niobates, titanates, tantalates, PZT ceramics, etc.
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