| Title |
Dielectric and strain properties of Pb(Mg_{1/3}Nb_{2/3})O_{3}-PbTiO_{3} Ceramic with Respect to the Variation of SrTiO_{3} Substitution |
| Authors |
지승한 ; 이해영 ; 이덕출 ; 이진걸 ; 이연학 |
| Abstract |
In this paper dielectric and electrostrictive strain properties of (1-y-x)Pb(Mg_{1/3}Nb_{2/3})O_{3}-PbTiO_{3}-yPbTiO_{3}-xSrTiO_{3}[(1-y-x)PMN-yPT-xST] ceramics fabricated by using columbite precursor method have been investigated with the substitution of SrTiO_{3}(ST). Dielectric constant of the specimens increased with the increase of ST content up to 5[m/o] and decreased with further substitution of ST. And the pyrochlore phase decreased with the increase of ST content up to 5[m/o] in XRD analysis. The elimination of the pyrochlore phase improved dielectric constants. The electrostrictive strains generated by AC electric field have the highest value at 5[m/o] SrTiO_{3} addition and the hysteresis of strain ranged from 12 to 20[%]. The electrostrictive strain at various temperature investigated in the temperature range of -50[°C]~74[°C]. In higher temperature than phase transition region, it showed paraelectric property which shows very small hystersis. |