STUDY OF TANTALUM-SINTERED ANODES

The variation in the morphological and electric parameters of macropor ous tantalum anodes was studied as a function of sintering temperature . There was a good correlation between the measurements of both proper ties. Up to 1400-degrees-C, the sintering occurs by means of surface d iffusion mechanisms. For higher temperatures, the volume diffusion is more important because the properties of the sintered anode vary rapid ly. At high temperatures, for example, 1800-degrees-C, the diminution in the specific surface area leads to considerable loss of capacity wi th the result that the system has no value as a capacitor anode.