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• W2973334222 abstract "This dissertation has the main goal of developing ceramic materials for Mask-Image-Projection-based Stereolithography (MIP-SLA) technology, focused on electronic applications. To accomplish this aim, a low temperature co-fired ceramic (LTCC) material was selected, mainly used for radio frequency applications. Moreover, the proof of concept of AM technology hybridization and multi-materials printing is also demonstrated, opening the door to new researchers in the field of 3D-2D printing electronic devices, from both the material and technology perspectives. To successfully achieve the main goal, the different steps of the whole process were successfully achieved, i.e, formulation of a LTCC photocurable suspension, its printability by MIP-SLA technology, and the post-thermal treatment of debinding and sintering. The photocurable LTCC suspension consists of ceramic particles dispersed in a suitable photocurable resin, which must polymerize in the visible light range, trapping the ceramic particles. The challenge of the development and optimization of a LTCC photocurable suspension for MIP-SLA with the appropriate rheological and photocurable behavior is accomplished in this work. The printed piece contains the polymeric part, which must be removed (debinding) and then sintered for the densification of the final ceramic piece. This is the most difficult and time-consuming step of the whole process. The so-called debinding is one of the most challenging steps of the SLA-based technology of ceramic materials. In this sense, a detailed study of the debinding process is carried out for a deeper understanding of the degradation of the resin during the thermal debinding. For this to happen, the optimization of the temperature rate and used atmosphere during the thermal treatment is also presented in this work. In fact, the analysis and understanding of thermal treatment parameters and their repercussion on the final results is the key to successfully achieving the main goal, which is to obtain final ceramic pieces without defects. The limits of the MIP-SLA printing process are presented, analyzing the resolution, fidelity of pattern transfer, and accuracy of the printing process using the optimized LTCC suspension. The involved phenomena during the photopolymerization such as light scattering, non-uniformities of the light projection along the building platform and shrinkage during the polymerization, are analyzed and optimized for a fruitful printing process. The greatest achievement of this work is the possibility of printing complex geometry with high resolution with a LTCC material, which has never been demonstrated before in the field of additive manufacturing. This is the beginning of new breakthroughs in multimaterial printing for electronic applications." @default.
• W2973334222 created "2019-09-26" @default.
• W2973334222 creator A5070814124 @default.
• W2973334222 date "2019-06-20" @default.
• W2973334222 modified "2023-09-23" @default.
• W2973334222 title "Development and optimization of a low temperature co-fired ceramic suspension for mask-image-projection-based stereolithography" @default.
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