圧電応用のためのPb(Mg_<1/3>Nb_<2/3>)O_3-PbZrO_3-PbTiO_3セラミックスのモルフォトロピック相境界の精密化とピンポイント組成の探索

概要

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The morphotropic phase boundary (MPB) for the PMNZT series of high-density ceramics (xPb(Mg_<1/3>Nb_<2/3>)O_3-yPbZrO_3-zPbTiO_3; x=0.1-0.2, y=0.400-0.486, z=0.395-0.477) is relocated based on analyses of the dielectric, piezoelectric and ferroelectric properties of incremental compositions. The PMNZT ceramics, fabricated by the columbite route, exhibit a single-phase perovskite structure. The refined MPB line is shifted toward the PbTiO_3 (PT) side in the ternary field by approximately 2.4 mol% from the position reported in the literature and the pinpoint composition for piezoelectric applications is further shifted toward the PT side by approximately 1.2 mol% from the obtained MPB line. The PMNZT 14.2/41.6/44.2 (100x/100y/100z) composition near the MPB line is shown to have properties suitable for practical applications.
社団法人日本セラミックス協会の論文
2006-03-01