Estudo da influência do tempo de sinterização na produção de capacitores eletrolíticos de nióbio
In recent years, niobium has gained well-deserved recognition for its impressive mechanical and electrical properties. This recognition has driven extensive research efforts in both academic institutions and industrial companies, aiming to provide solutions and benefits to society at large. In this...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/53510 |
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| Resumo: | In recent years, niobium has gained well-deserved recognition for its impressive mechanical and electrical properties. This recognition has driven extensive research efforts in both academic institutions and industrial companies, aiming to provide solutions and benefits to society at large. In this context, the present study aims to evaluate the feasibility of using niobium in the production of electrolytic capacitors, which are electronic components of utmost importance in various industrial sectors.
The potential applicability of niobium in electrolytic capacitors lies in its physical properties. However, several factors can influence the performance of a capacitor, such as sintering time, sintering temperature, and anodization voltage. Therefore, this work analyzes these parameters to draw conclusions regarding the optimal combination of factors by relating the experimental results with those available in the literature. The powder was characterized using particle size analysis, X-ray diffraction (XRD), and scanning electron microscopy.
The results obtained from the particle size analysis revealed particles with an average size of 36.50 μm. In the micrographs, the particles exhibited a parallelogram-shaped arrangement and, at times, an irregular shape, with a wide range of sizes, as also observed in the particle size analysis. X-ray diffraction confirmed the presence of pure niobium powder. The samples were subjected to different sintering times (30 and 60 minutes) at sintering temperatures of 1400°C, 1450°C, and 1500°C. The electrolytic solution used, consisting of 1% volume concentration of phosphoric acid, was the same for all groups, but the applied voltage varied (10V, 20V, and 40V). The results of this study were compared among the groups to determine the optimal combination of factors for the production of niobium electrolytic capacitors.
Among the different groups analyzed, the group sintered at 1450°C for 60 minutes obtained the best results for specific capacitance with an anodization voltage of 10V. As for specific charge, the best result was achieved by the group with an anodization voltage of 40V, sintering temperature of 1400°C, and a sintering time of 30 minutes. These findings lead us to infer that Nb is an element capable of being applied in electronic components such as capacitors. |
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