TP23 : Manufacturing and characterization of microtubular solid oxide fuel cell electrolytes prepared by extrusion method
Thesis > Central Library of Shahrood University > Chemical and Materials Engineering > MSc > 2019
Authors:
Loghman Namaki gharahnav [Author], Mojtaba Ghatee[Supervisor], Seyed Hadi Ghaderi[Supervisor]
Abstarct: Fuel cells are electrochemical devices that convert chemical energy to electrical. Two exist including planar and tubular design, among which the tubular design stability against thermal cycles, faster start up time higher volumetric power, and etc. In this research, extrusion process was used to prepare micro tubular solid oxide fuel cells. After die design, the proper poste composition for electrolyte material and graphite laxyer was determined by rheological analysis. The viscosity measurements, frequency sweep performed. The proper paste composition of the electrolyte paste was 77.5 wt% powder 8YSZ, 17 wt% water, 3 wt% glycerin, 2.5 wt% methyl cellulose, and proper paste composition of the graphite paste was 79 wt% graphite powder, 12.5 wt% water, 2 wt% glycerin and 6.5 wt% methyl cellulose. The tension test and dynamic mechanical analysis analysis was also done. The specimens were sintered at 1300 °C, 1400 °C and 1500 °C. The density, thickness, hardness, bending strength, and fracture toughness were measured. The microstructure of the samples were analyzed by fiel emission scanning electron microscope. The results showed that by using extrusion and sacrificial core, it is possible to produce micro tube with average thickness of 131±17 µm, bending strength of 258±17 MPa and hardness of 18±0.05 GPa.
Keywords:
#Solid oxide fuel cells #Micro tubular #Extrusion #Rheology #Mechanical properties Link
Keeping place: Central Library of Shahrood University
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