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Capacitor grade tantalum wire

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Update time : 2022-11-07 16:02:35

Capacitor grade tantalum wire is mainly used for tantalum capacitor anode lead capacitor tantalum wire brand, characteristics and applications.

The characteristics and applications of pure tantalum wire are as follows: pure tantalum wire without doping elements has high chemical purity, coarse grain and slightly poor antioxidant brittleness. It is suitable to be used with large powder with low oxygen and nitrogen content, and the sintering temperature of anode block should be below 1700°.

Physical properties of capacitor grade tantalum wires

Tantalum wire density is between 16.45-16.5, resistivity is 13.5, thermal expansion coefficient is 6.5, specific heat capacity is 0.142, resistance temperature coefficient is 3.5 chemical performance

The oxidation resistance is very stable in air at room temperature, but it is very poor at high temperature. It will be oxidized when heated to more than 300°. With the increase of temperature, the oxidation is more intense.

Corrosion resistance Tantalum is very resistant to corrosion in most acids. At 150 temperature, no concentration of hydrochloric, nitric, phosphoric and organic acids can corrode tantalum. But tantalum is soluble in hydrofluoric acid, a mixture of hydrofluoric acid and nitric acid, and even more so in a mixture of hydrofluoro, acid and hydrochloric acid.

Mechanical properties:

Tantalum wire annealing state, tensile strength is 545MPa, elongation is 22.5%, surface hardness is 140HV process performance, commonly used capacitor grade tantalum wire performance is: tantalum wire surface quality is bright, clean, no oil, cracks and burrs. Observe tungsten continuous pits and scratches under a 10 - meter magnifying glass.

Suggestions for the selection of capacitor grade tantalum wire are as follows:

There are many varieties and specifications of capacitor grade tantalum wire. The selection of tantalum wire should be appropriate according to the production process conditions of tantalum capacitor and the chemical purity of tantalum powder used with tantalum wire, especially the content of oxygen and nitrogen. All tantalum capacitor manufacturers have rich experience in this field. 

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