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Investigation shows heat treatment enhances specific charge and surface area in capacitor anodes, indicating better performance.
The results of investigation of the influence of various methods of heat treatment of primary calcium-thermal tantalum powders on the characteristics of capacitor anodes are presented. Heat treatment of powder with specific surface area of 8.6 m/g in the temperature range of 900–1300 °C followed by deoxidation with magnesium vapor allowed to obtain capacitor powders with specific charge from 30000 to 80000 μC/g. As a result of powder heat treatment such characteristics of anodes as sintering shrinkage, powder specific surface utilization factor (increased from 4 to 20% at anodization up to 30 V) were improved. Specific charge losses at increasing the anodizing voltage from 16 to 40 V decreased from 80 to 25%.
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Orlov et al. (2025) studied this question.
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