According to the different chemical compositions of the product, it is divided into two brands: DTal(pure tantalum wire) and DTa2(doped tantalum wire). Each brand can be divided into two types: SDTa1SDTa2 for solid electrolytic capacitors and LDTa1LDTa2 for liquid tantalum electrolytic capacitors. Product leakage current is not greater than 010μA/cm. The surface-specific capacitance of tantalum wire for liquid tantalum electrolytic capacitors (K)10μF·V/cm~12μF·V/cm²
Test method for resistance to oxygen brittleness
Take the sample with a length of 20mm and select tantalum powder with an oxygen content of 0.6%-0.018% and nitrogen content of 0.011%-0.013%（Tantalum powder with an oxygen content of 014%~0.16% shall be selected for tantalum wire with diameter less than 0.30mm）The tantalum block formed by pressing into tantalum block shall not break when falling freely into glassware at a height of 5cm. The tantalum wire lead of the tantalum block shall not be bent, and the tantalum wire lead shall be buried at 1/2 to 2/3 of the height of the tantalum block The tantalum block is placed in the furnace with a vacuum degree not less than 27x10-Pa (when the pressure in the furnace is 27x10 1 Pa, the pressure in the furnace is not more than 013Pa after closing the exhaust valve for 2 minutes), and the temperature is raised to 1900 After 30min of constant temperature sintering and 120min of cooling, the tantalum wire was clamped with needle-nose pliers, and the top of the tantalum wire was bent 90 degrees at the root and then returned to the original position once, and the reverse direction was bent 90 degrees and then returned to the original position twice, and so on until the tantalum wire was broken.
