Piezoelectric/electrostrictive porcelain composition, piezoelectric/electrostrictive body, and piezoelectric/electrostrictive film type device

摘要

There is disclosed a piezoelectric/electrostrictive porcelain composition capable of constituting a bulk-like or film-like piezoelectric/electrostrictive body which is dense and which has a large strain or displacement. A piezoelectric/electrostrictive porcelain composition contains: a PbMg_1/3Nb_2/3O₃-PbTiO₃-PbZrO₃ ternary solid solution system composition as a main component; and 0.05 to 3.0 mass% of Ni in terms of NiO, or contains: a Pb(Mg, Ni)_1/3Nb_2/3O₃-PbTiO₃-PbZrO₃ ternary solid solution system composition as a main component; and at least one selected from the group consisting of Mg₂SiO₄, Ni₂SiO₄ and (Mg, Ni)₂SiO₄, and a total content ratio of Mg₂SiO₄, Ni₂SiO₄ and (Mg, Ni)₂SiO₄ is 0.2 mol% or less.