Characterization and properties of an organic-inorganic dielectric nanocomposite for embedded decoupling capacitor applications
Characterization and properties of an organic-inorganic dielectric nanocomposite for embedded decoupling capacitor applications
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DOI：
10.1016/j.compositesa.2006.02.002
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发表时间：
2007
影响因子：
8.7
通讯作者：
Jianwen Xu;C. Wong
中科院分区：
文献类型：
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作者：
Jianwen Xu;C. Wong
由于聚合物-陶瓷（由于铝颗粒的绝缘陶瓷壳）和聚合物-金属（由于铝颗粒的金属核）系统的综合特性，聚合物/铝纳米复合材料具有高介电常数和低介电损耗。在这项工作中，采用环氧化物官能化硅烷偶联剂对铝颗粒进行表面处理，以进一步提高聚合物/铝复合材料的介电性能和加工性能。使用傅里叶变换红外光谱（FTIR）和热重分析仪（TGA）对偶联剂处理前后的铝颗粒进行表征。结果发现硅烷偶联剂成功接枝在铝颗粒表面。聚合物/铝复合材料的流变学研究表明，偶联剂处理可以显着降低铝复合材料的粘度，这表明偶联剂处理可以提高铝复合材料在高填充量水平下的加工性能。使用介电分析仪（DEA）研究了铝复合材料的介电性能，包括频率响应和电容温度系数。使用场发射扫描电子显微镜（SEM）对铝复合材料的微观结构进行了表征。研究发现，偶联剂处理可以改善铝颗粒的分布，从而提高铝复合材料的介电常数。
Polymer/aluminum nanocomposites have a high dielectric constant and a low dielectric loss because of the combined characteristics of polymer–ceramic (due to the insulating ceramic shell of an aluminum particle) and polymer–metal (due to the metal core of an aluminum particle) systems. In this work, an aluminum particle surface treatment was performed with an epoxide-functionalized silane coupling agent in order to further improve the dielectric properties and processibility of polymer/aluminum composites. Fourier transformed infrared spectroscopy (FTIR) and thermogravimetric analyzer (TGA) were used to characterize the aluminum particles before/after coupling agent treatment. It was found that the silane coupling agent was successfully grafted on the aluminum particle surface. Rheology studies of polymer/aluminum composites showed that the coupling agent treatment could significantly reduce the viscosity of the aluminum composites, which indicates coupling agent treatment can improve the processibility of aluminum composites at high filler loading levels. Dielectric properties, including the frequency responses and temperature coefficient of capacitance of the aluminum composites were studied with a dielectric analyzer (DEA). The microstructures of aluminum composites were characterized with a field emission scanning electron microscope (SEM). It was found that a coupling agent treatment can improve the aluminum particle distribution and thereby enhancing the dielectric constant of aluminum composites.