Fabrication and Characterization of Fully Inkjet Printed Capacitors Based on Ceramic/Polymer Composite Dielectrics on Flexible Substrates
Fabrication and Characterization of Fully Inkjet Printed Capacitors Based on Ceramic/Polymer Composite Dielectrics on Flexible Substrates
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DOI：
10.1038/s41598-019-49639-3
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发表时间：
2019-09-16
影响因子：
4.6
通讯作者：
Binder, Joachim R.
中科院分区：
文献类型：
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作者：
Mikolajek, Morten;Reinheimer, Timo;Binder, Joachim R.
提出了以陶瓷/聚合物复合材料为介质材料的全喷墨印刷电容器的制备方法。因此，开发了陶瓷/聚合物复合油墨，其允许复合厚膜的快速一步制造。Ba0.6Sr0.4TiO3（BST）用作陶瓷组分，聚（甲基丙烯酸甲酯）（PMMA）用作聚合物。这种复合材料的使用允许在柔性基底上印刷。此外，与纯聚合物相比，它导致介电常数的值改善。三种具有不同比例的BST与PMMA的复合油墨分别用于制造由33、50和66体积% BST组成的复合厚膜。所有墨水都能形成均匀的结构，在电容器的不同层之间具有精确的过渡。除了印刷厚膜的微观结构，介电性能的特征在于在100 Hz至200 kHz的频率范围内的阻抗谱。此外，较大的陶瓷颗粒尺寸的影响进行了研究，以提高介电常数。印刷电容器在1 kHz下表现出20至55的介电常数。最后，将实验结果与不同的理论模型进行比较，并评估了它们对复合材料预测的适用性。
The preparation of fully inkjet printed capacitors containing ceramic/polymer composites as the dielectric material is presented. Therefore, ceramic/polymer composite inks were developed, which allow a fast one-step fabrication of the composite thick films. Ba0.6Sr0.4TiO3, (BST) is used as the ceramic component and poly(methyl methacrylate) (PMMA) as the polymer. The use of such composites allows printing on flexible substrates. Furthermore, it results in improved values for the permittivity compared to pure polymers. Three composite inks with varying ratio of BST to PMMA were used for the fabrication of composite thick films consisting of 33, 50 and 66 vol% BST, respectively. All inks lead to homogeneous structures with precise transitions between the different layers in the capacitors. Besides the microstructures of the printed thick films, the dielectric properties were characterized by impedance spectroscopy over a frequency range of 100 Hz to 200 kHz. In addition, the influence of a larger ceramic particle size was investigated, to raise permittivity. The printed capacitors exhibited dielectric constants of 20 up to 55 at 1 kHz. Finally, the experimental results were compared to different theoretical models and their suitability for the prediction of epsilon(composite) was assessed.