Abstract
Due to its multi-material capabilities, 3D inkjet printing allows for the fabrication of components with functional elements which may significantly reduce the production steps. The potential to print electronics requires jettable polymer-ceramic composites for thermal management. In this study, a respective material was formulated by functionalizing submicron alumina particles by 3-(trimethoxysilyl)propylmethacrylate (MPS) and suspending them in a mixture of the oligourethane Genomer 4247 with two acrylate functionalities and a volatile solvent. Ink jetting tests were performed, as well as thermal conductance and mechanical property measurements. The material met the strict requirements of the printing technology, showing viscosities of around 16 mPa·s as a liquid. After solidification, it exhibited a ceramic content of 50 vol%, with a thermal conductance of 1 W/(m·K). The resulting values reflect the physical possibilities within the frame of the allowed tolerances set by the production method.
Highlights
IntroductionTral with regard to jurisdictional claims in published maps and institu‐
The as‐received samples experienced a weight loss of 0.8 wt%, which is caused by the removal of surface‐bound water
The same is true for Sil‐0, where the weight loss of 1.1 wt% is more pronounced due to the attrition‐caused increase of the surface area and surface‐bound water
Summary
Tral with regard to jurisdictional claims in published maps and institu‐.
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