Pb(Mg_<1/3>Nb_<2/3>)0_3系緩和型強誘電体における電界誘起歪みの温度依存性

概要

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Strains induced by a bipolar and a unipolar electric field in Pb (Mg_<1/3>Nb_<2/3>) 0_3 (PMN) 0.9 (Pb (Mg_<1/3>Nb_<2/3>) 0_3} O.1PbTi0_3 (0.9PMN O.1PT) and 0.8 {Pb (Mg_<1/3>Nb_<2/3>)0_3} 0.2{Pb(Zr_<1/2>Ti_<1/2>)0_3} (0.8PMN 0.2PZT) relaxor fer roelectric ceramics were measured using a strain gauge method in the temperature range of 30 90℃. In the paraelectric phase region above the Curie tern perature (T_e), both bipolarly and unipolarly induced strains decrease with increasing temperature and there were no remarkable differences between them. In the ferroelectric phase region below T_e, the unipolarly induced strains significantly decrease as the temperature decreases, whereas the bipolarly induced strains rarely change and the coercive fields as well as the remanent strains increase. The magnitude of the unipolarly induced strains is almost the same as the differences between the bipolarly induced strains and the remanent strains. In 0.8PMN 0.2PZT and 0.9PMN 0.1PT, the temperature of maximum strain was lower than Tc by ca. 30℃
社団法人日本セラミックス協会の論文
1995-01-01