... 10W) purity:99.95%,99.99% ISO9001:2008 tantalum bar ASTM B365Introduction:Tantalum is dark, dense, ductile, very hard, easily ... and some high-power resistors. Tantalum electrolytic capacitors exploit the tendency of tantalum to form a protective oxide surface ... small volume. Because of the size and weight advantages, tantalum capacitors are attractive for portable telephones, personal computers, ...