Effects of Impurity on Properties of PZT(II)

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J. Korean Ceram. Soc. > Volume 20(3); 1983 > Article

Journal of the Korean Ceramic Society 1983;20(3): 227.

PZT 특성에 미치는 부조물의 영향(II)

임응극, 정수진, 유강수

서울대학교 공과대학 무기재료공학과

Effects of Impurity on Properties of PZT(II)

ABSTRACT

The dielectric and piezoelectic properties in which $(Zr_{0.52} Ti_{0.48})^{+4}$ ions of $Pb(Zr_{0.52} Ti_{0.48})O_3$ are partially substituted for $W^{+6}$ ions were studied. $ZrTiO_4$ was made by coprecipitation. The specimens of disc shape were sintered respectively at 1180$^{circ}$to 130$0^{circ}C$ at an intervals of 2$0^{circ}C$ for 1 hour. The optimum sintering temperature were found to be between 126$0^{circ}C$ and 128$0^{circ}C$. PZT solid solutions sintered had the tetragonal structure with c/a=1.025$pm$0.005 and theoretical densities incre-ased from 8.02 to 8.17g/cm3 with increasing the amount of the partial substitution of $(Zr_{0.52} Ti_{0.48})^{+4}$ ion for $W^{+6}$ ion The grain size and curie temperature decreased with increasing the amount of $WO_3$ while the dielectric constant increased. When $(Zr_{0.52} Ti_{0.48})^{+4}$ ion was substituted for 1 mole% of $W{+6 ]$ion the planar coupling coefficient$(K_P)$ was as high as 0.58 But as the amount of $WO_3$ increased the mechanical quality factor(Qm) decreased considerably.