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采用DSC研究了PZT P(VDF TrFE) 70 30复合材料的非等温结晶和居里相变过程 .结果表明 ,PZT粒子对共聚物基体的结晶行为 ,包括结晶温度、结晶速率和结晶度等影响不大 ;然而共聚物的居里相变过程则受到PZT粒子的影响 ,随PZT粒子含量的增大 ,共聚物基体的居里相变热焓与熔体结晶热焓的比值减小 ,而且其中对应从顺电性的高温相 (HT)转变为铁电性的过冷相 (CL)的相变热焓含量减小 ,意味着PZT粒子的存在能够抑制共聚物铁电晶体中旁式构象缺陷的形成 ,从而提高铁电晶体的完善度
The non-isothermal crystallization and the Curie transformation of PZT P (VDF TrFE) 70 30 composites were investigated by DSC.The results showed that the influence of PZT particles on the crystallization behavior of the copolymer matrix, including the crystallization temperature, crystallization rate and crystallinity However, the Curie phase transition of copolymer is influenced by PZT particles. With the increase of PZT particles content, the ratio of Curie phase transition enthalpy and melt enthalpy decreases, A decrease in the enthalpy of phase transition from a paraelectric HT phase to a ferroelectric overcooled phase (CL) means that the presence of PZT particles can inhibit the formation of a side-conformational defect in the copolymer ferroelectric crystal , Thereby improving the perfection of ferroelectric crystals