In this work, novel polypropylene/BiSr2CaCu2O6.5 (PP/Bi-1212) thick film composites having ceramic content varying between 0.5% and 6% were prepared to enhance both the dielectric and mechanical properties of PP. The surface morphologies of the samples were determined by scanning electron microscope. The crystallinity change in PP due to Bi-1212 filler was also described by differential scanning calorimetry analysis. The highest crystallinity degree was observed for the PP/0.5% Bi-1212 composite. The tensile parameters such as Young’s modulus, tensile strength, percentage strain at break and energy at the break of the samples were also determined by analyzing the stress–strain curves. The highest tensile strength, stiffness, percentage strain at break and energy to break values were observed for the PP/(0.5%Bi-1212 composite. The complex electrical properties of the samples were also investigated by impedance spectroscopy measurements performed at room temperature between 10 Hz and 40 MHz frequency. The complex impedance, permittivity, ac conductivity and electrical modulus analyses revealed that 1% Bi-1212 additive changed the frequency dependence of the real and imaginary parts of the complex permittivity considerably and increased the dc conductivity of PP by approximately 0.2 million times. In this context, the percolation concentration for the conductivity of PP can be determined as approximately 1.0 wt% Bi-1212 filler. The electrical modulus analysis also indicated that the higher filler additive led the Maxwell–Wagner-type interfacial polarization in PP. Ultimately, it has been suggested that 3.0% of Bi-1212 added PP composite can be used as a dielectric material for decoupling capacitor applications.

中文翻译：

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BiSr2CaCu2O6.5陶瓷增强聚丙烯的机械和介电性能

在这项工作中，制备了陶瓷含量在 0.5% 到 6% 之间变化的新型聚丙烯/BiSr2CaCu2O6.5 (PP/Bi-1212) 厚膜复合材料，以提高 PP 的介电和机械性能。通过扫描电子显微镜测定样品的表面形貌。还通过差示扫描量热法分析描述了由 Bi-1212 填料引起的 PP 结晶度变化。PP/0.5% Bi-1212 复合材料的结晶度最高。拉伸参数如杨氏模量、拉伸强度、断裂应变百分比和断裂能量也通过分析应力-应变曲线来确定。PP/(0.5%Bi-1212 复合材料) 的拉伸强度、刚度、断裂应变百分比和断裂能值最高。还通过在室温 10 Hz 至 40 MHz 频率下进行的阻抗谱测量研究了样品的复杂电学特性。复阻抗、介电常数、交流电导率和电模量分析表明，1% Bi-1212 添加剂显着改变了复介电常数的实部和虚部的频率依赖性，并将 PP 的直流电导率提高了约 20 万倍。在这种情况下，PP 导电性的渗透浓度可以确定为大约 1.0 重量％的 Bi-1212 填料。电模量分析还表明，较高的填料添加剂导致 PP 中的 Maxwell-Wagner 型界面极化。最后，建议3。