... :GB 3628,ASTM B 386,etc. Different sizes availabl pure tantalum strip Tantalum is dark, dense, ductile, very hard, easily fabricated, ... oxide surface layer, using tantalum powder, pressed into a pellet shape, as one "plate" of the capacitor, the oxide as the ... electrolytic capacitor), a high capacitance can be achieved in a small volume. Because of the size and weight advantages, tantalum capacitors ...