Pb(Zn_<1/3> Nb_<2/3>)O_3-PbTiO_3-PbZrO_3 系セラミックスの圧電及び強誘電的性質

概要

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High density ceramics with compositions of 0.24Pb(Zn_<1/3>Nb_<2/3>)O_3・yPbTiO_3・(0.76-y)PbZrO_3(PZNTZ 24/100y/76-100y), where y=0.350 to 0.456 were fabricated by normal sintering. The dielectric, piezoelectric and ferroelectric properties of these PZNTZ ceramics were systematically investigated. The morphotropic phase boundary(MPB)composition of PZNTZ 24/100y/76-100y system was at y=.376. The highest values of electromechanical coupling factror, k_p and piezoelectric constant, d_<31> were 63% and -191 pC/N, respectively, and were obtained in the PZNTZ 24/37.6/38.4 ceramics. Regarding the ferroelectric properties, the largest remanent polarization, P_r=38.1 μC/cm^2 and the smallest coercive field, E_c=11.6 kV/cm among the PZNTZ ceramics studied in this work were obtained in the PZNTZ 24/35.3/40.7 ceramics. The experimental results demonstrate the PZNTZ 24/37.6/38.4 ceramics are potential element materials for piezoelectric applications.
社団法人日本セラミックス協会の論文
2002-01-01