Role of Secondary Phase in High Power Piezoelectric
This study reports the dielectric and piezoelectric properties of 0.4
( Pb ) Mg1/3Nb2/3 ‐0.25 O3 ‐0.35 PbZrO3
( PbTiO3 ), 2 mol% PMN‐PZT ‐doped 0.4 MnO2 ( Pb ) Mg1/3Nb2/3 ‐0.25 O3 ‐0.35 PbZrO3
( PbTiO3 ), and 0.06 MnO2+PMN‐PZT ( Pb ) Mn1/3Nb2/3 ‐0.34 O3 ( Pb ) Mg1/3Nb2/3 ‐0.25 O3 ‐0.35 PbZrO3
( PbTiO3 ) ceramics. The results show that PMnN+PMN‐PZT modification results in the formation of MnO2 secondary phase which promotes grain growth and reduces
the electromechanical properties. We conclusively demonstrate that MgO acts as pervoskite stabilizer in Mn2+ ‐based (1:2) relaxors and leads to the formation of divalent oxide secondary phase.
Modification with Pb avoids the formation of PMnN and provides combinatory doping effect with smaller grain sizes.
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Document Type: Research Article
Publication date: 2011-12-01