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- W3014646520 abstract "Featuring fluorite structure and easy doping with rare earths, responsible for maintaining the stability and formation of oxygen vacancies, cerium-based solid electrolytes are the main focus in research for intermediate temperature fuel cells (700 ° C). The research pursue the multiple doping of cerium oxide (Ce0,8Gd0,18Sm0,02O1,9) with zirconia oxide (Zr0,9Y0,1O2) in concentration of 10,20, 30 and 40%. Preparation of the doped oxide was done using the chemical synthesis of the Pechini method. The refined powder obtained by the technique was milled in a high energy mill, shaped in a cold uniaxial pressing, and sintered in two different sintering curves: The first, with only one step at 1500°C, and the second in two stages, with plateau at 1650°C followed by cooling and plateau of 1500°C. The physical and chemical properties of the samples were evaluated through TGA, XRD, density and surface evaluation through SEM. The evaluation of the resistive characteristics of the samples was evaluated through the Impedance Spectroscopy, evaluated in the range of 310°C to 385°C. The result provided the evaluation of the conductivity and activation energy of the samples through the Arrhenius graph. It was observed that the samples with higher percentage of cerium oxide, as well as sintered samples in the sintering ramp in 2 stages, showed lower activation energy and higher conductivity." @default.
- W3014646520 created "2020-04-10" @default.
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- W3014646520 date "2019-01-01" @default.
- W3014646520 modified "2023-09-27" @default.
- W3014646520 title "Preparo, sinterização e caracterização de eletrólitos sólidos baseados em Céria-Zircônia" @default.
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- W3014646520 doi "https://doi.org/10.26512/ripe.v5i2.24660" @default.
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