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Dissertation
Fundamental studies for the development of passive valves in miniaturised ceramic based fuel cell systems.

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The aim of this work is to study the LTCC fabrication process and develop passive miniaturized ceramic valves in fuel cell system. Fraunhofer IKTS is pioneering in the ways energy requirements are being met for this generation portable devices.par The following report describes my work done towards my master’s thesis at Fraunhofer IKTS. Owing to my interest in the field for nano electronics and electronic packaging I had chosen to carry out my masters thesis at Fraunhofer IKTS in the electronics and microsystem engineering department, and work with hybrid microsystems. The main focus of the department is developing functional ceramics and ceramic based miniaturized components. Applications lie in the areas of packaging for electronics and high-power electronics, sensors, and energy technology (micro-fuel cells and photovoltaics). During my first meetings I was explained their current project regarding the micro-fuel cells, the challenges it brings and the scope of such a development. I became interested in this topic and decided to work towards its development for my thesis. Chapter 1 gives in brief explanation about the existing LTCC technology, its various advantages and explains the ongoing fuel cell project at Fraunhofer IKTS. Chapter 2 describes the State of the art and the experiments conducted and the conclusions drawn from them. The Solidworks and ANSYS simulations are discussed and results stated. Chapter 3 explains the motivation behind the new design for the valve and explains its working. Chapter 4 The complete journey of development from Idea to device has been explained with all the problems faced and how they were overcome. Chapter 5 closes the loop with conclusions and results as well as the future scope and potential improvements which can be made in the device. Chapter 6 contains appendix with all the acquired results and diagrams.

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Book
Progress Reports on Impedance Spectroscopy
Authors: --- --- --- --- --- et al.
ISBN: 3110447673 311044982X 9783110449822 9783110449839 3110449838 3110447568 Year: 2016 Publisher: München Wien

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Impedance Spectroscopy is a powerful measurement method used in many application fields such as electrochemistry, material science, biology and medicine, semiconductor industry and sensors.This book covers new advances in the field of impedance spectroscopy including fundamentals, methods and applications by contributions from international scientists. This book reports about new advances and different approaches in dealing with impedance spectroscopy including theory, methods and applications. Impedance spectroscopy is a widely used and interesting measurement method applied in many fields of science and technology such as electro chemistry, material science, biology and medicine. In spite of the apparently different scientific and application background in these fields, they share the same measurement method in a system identification approach and profit from the possibility to use complex impedance over a wide frequency range and giving interesting opportunities for separating effects, for accurate measurements and for simultaneous measurements of different and even non-accessible quantities. For Electrochemical Impedance Spectroscopy (EIS) competency from several fields of science and technology is indispensable. Understanding electro chemical and physical phenomena is necessary for developing suitable models. Suitable measurement procedures should be developed taking specific requirements of the considered application into account. Signal processing methods are very important for extracting target information by suitable mathematical methods and algorithms. New trends are emerging rapidly involving special techniques for realizing fully automatic embedded solutions at low costs and requiring a deep overview of modern information technology.


Digital
Progress Reports on Impedance Spectroscopy : Measurements, Modeling, and Application
Authors: --- --- --- --- --- et al.
ISBN: 9783110449822 9783110447675 9783110447569 Year: 2016 Publisher: München ;; Wien De Gruyter Oldenbourg

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