Abstract
In this study, an anodic oxidation was made by electrolysis by using a sintered body of aluminum prepared in nitrogen atmosphere as anode and ammonium dihydrogen phosphate as electrolyte A dielectric element thus obtained was made into a solid electrolytic condenser by coating with manganese dioxide (MnO2) as semiconductor. That is: a solid electrolytic condenser of sintered sluminum was prepared. Experiments were conducted to examine the effects of particle size of aluminum powder and compacting pressure on electric characteristics of the condenser. The particle size in the experiments was of 4 kinds: 20, 35-150, 150-200, and 200 mesh, and the compacting pressure applied was 0.1 and 0.2t. The capacitance at 120Hz was assumed to be 100 as a standard and the ratio of capacitance at each frequency was considered for examination. As the results of experiments, it was observed that the capacitance ratio at each frequency was smaller and the value of tan δ was larger with the decrease in particle size of aluminum powder, and there were little differences between the effects of 0.1 and 0.2t of compacting pressure.
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