PREPARATION AND PROPERTIES OF PIEZOELECTRIC COMPOSITES OF PZT/PVDF
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摘要: 用氧化物一步合成法制备了PZT 粉末, X 射线衍射测试结果显示, 它是Zr/T i 为52∶48 的纯四方钙钛矿型结晶相, 并用SEM 观察了PZT 粉末的形貌; 用热分析仪测试了PVDF 的固化温度; 在自制模具上采用模压/烧结工艺获得了六种含PZT 不同体积含量的PZT/ PVDF 复合材料; 对其介电性和压电性的测试表明, 随着PZT体积含量的增加, 电性能参数呈非线性增大, 当PZT 的体积份数超过70% 时, 介电常数E和压电常数d33值迅速增加, PZT 体积份数达到90% 时, 其电性能参数与纯PZT 值接近, 但此时复合材料的脆性较大, 已没有实用价值。Abstract: PZT powder is made using oxide one off sintering technique. Its X ray diffraction (XRD) peaks are monitored and shown to be in crystallization phase of pure square with Zr/Ti equal to 52:48. The pattern of the PZT powder is observed with SEM; the mold technique of PVDF is analyzed by TG DTA. Six sorts of PZT/PVDF composites are obtained with different PZT volume ratios by compression mould/sintering technique. Tests of dielectric and piezoelectric show that electric parameter accretion increases nonlinearly with PZT content, when the volume content of PZT exceeds 70%, dielectric constant ε and piezoelectric constant d33 increase rapidly, and when it reaches 90% the electric parameters are almost the same as the pure PZT's.
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