Session: 03-28-01: Joint Session on Recent Advances in Advanced Materials Processing and Tribology

Paper Number: 89068

89068 - Inkjet Printed Ceramic/polymer Composite Dielectrics 

The persistent demand for flexible and wearable electronic components in healthcare, aerospace, media, and transit applications has facilitated the substitution of traditional electronics processes with printed electronics which has been predicted to dominate the market in the coming years. Electronics printing methods specifically, screen printing, offset lithography, and inkjet printing, are widely used in the aforementioned applications because of their ability to print lightweight, low cost, and low complexity electronics on a substrate. Among them, inkjet printing is a widely-explored additive technology for printed electronics such as capacitors where very precise and complex material deposition is required to create multimaterial layered structures. This type of micro dispensing additive technology utilizes liquid phase material by drop on demand (DOD) of various conductive and nonconductive nanoparticle inks to print capacitors. Different researchers have attempted to fabricate inkjet print polymer, ceramic, and other organic substances capacitors and have found out that the capacitance value increases compared to the conventional metal insulator metal (MIM) capacitor. The increase in the performance of the capacitor is because of the dielectric properties of the material used. Literature has also shown that we can further improve the capacitance value of capacitor by using a more insulating material for dielectrics such as composite. For instance, polymer morphology and crystallinity cannot be improved by incorporating ceramic but dielectric losses occurs due to reduction in space charges. This suggests that having composite as the dielectric material in a capacitor will likely increase the capacitance value. Among the spectra of composite dielectric materials that have been discussed, there is a scarcity of information on the use of ceramic/polymer dielectric materials for capacitor applications. As such, this study is to fabricate and characterize the ceramic/polymer composite based capacitor using inkjet printing method. The ceramic is Barium titanate (BaTiO₃) while the polymers are varied from polymethyl methacrylate (PMMA), Polyvinylidene fluoride or polyvinylidene difluoride (PVDF), polyethylene oxide (PEO), to Polyvinyl chloride (PVC). The formulated ceramic/polymers inks are used to print the dielectric material and the nanosilver ink for the two electrodes all in one step capacitor fabrication. The volume and speed jetting parameters were considered, to have an ideal and uniform liquid phase materials inkjet printing on the substrates.  The dielectric properties of these printed composites are characterized and are compared with different theoretical models of BaTiO₃/polymer dielectrics.  Results from this study will help understand the effect of composite composition and morphology on the dielectric properties of ceramic/polymer dielectrics.

Presenting Author: Mustapha Muhammad Wright State University

Presenting Author Biography: Mustapha Muhammad is a graduate student at Wright State University and is pursuing MS in Materials Science and Engineering.

Authors:

Mustapha Muhammad Wright State University
Hong Huang Wright State University
Ahsan Mian Wright State University