Synthesis Of Indium Zinc Oxide Via Sol Gel Method As Conductive Filler

Wan Omar, Wan Mohamad Syarifudin (2019) Synthesis Of Indium Zinc Oxide Via Sol Gel Method As Conductive Filler. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Electromagnetic Interference (EMI) is a problem that occurs in electronic world due to increased availability of electronic devices and needs to be overcome. To solve this problem, EMI shielding has been designed using conductive or magnetic materials to block the EMI. Metals are common materials used to make EMI shielding but due to its high corrosion and assembly cost, new materials are being developed to replace metals. This project aims to synthesize indium zinc oxide (IZO) powder that can be used as filler in polymer composite to replace the use of metal as EMI shielding. The IZO powder was formed by using the sol-gel method. In this study IZO particles synthesized via sol gel method at different doping concentration and annealing temperature were characterized, and effects of indium doping and annealing temperature on electrical properties of IZO particles were studied. The concentration of indium doping was varied at 0%, 3%, 5% and 7% for the same annealing temperature of 200 °C. Another set of parameter of samples was 5% indium concentration with different annealing temperatures of 80, 200, 300 and 450°C. The IZO particles were characterized using scanning electron microscope (SEM), energy dispersive x-ray (EDX), x-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). For the conductivity test, 4 point-probe test was used. From the result obtained, the concentration of different indium percentages does effect the conductivity of the IZO particles and the annealing temperature also affect the microstructure of IZO particle, in which the particle size became smaller when higher temperature was applied. Annealing temperature also affects the conductivity of IZO particle, in which the conductivity of IZO increase with the increase of annealing temperature.

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