Improving tantalum mechanical strength of the sintering method, the low melting point and its itself or its oxide easily react with water or acid metal as a deoxidizer and forming technology of tantalum in vacuum sintering, tantalum oxidation of a part of the DNA, and DNA to continue under the vacuum state after the completion of heating sintering of tantalum and tantalum powder crystal, so as to improve the mechanical strength of tantalum wire. The specific technical scheme is to first put the metal deoxidizer and the container for sintering tantalum wire, such as tantalum crucible, into the vacuum coating device, heat up in the vacuum state to vaporize the metal deoxidizer, and form a metal film on the surface of the container containing tantalum wire after cooling. The tantalum wire is then sintered in a vacuum sintering furnace in a coated container.
Tantalum wire is connected to the tantalum electrolytic capacitor is used to tantalum electrolytic capacitor welding necessary components on PCB, but with the miniaturization of electronic machine, digital, high frequency, high reliability direction of development, the demand for tantalum electrolytic capacitor tantalum powder volume is higher and higher, grain is more and more small, so the tantalum powder adsorbed oxygen in the air and the oxidation degree is more and more serious, A layer of oxide film is formed on the surface of tantalum powder particles, which blocks the flow of the fused layer on the surface of adjacent tantalum powder particles during sintering, so that their mutual crystallization ability decreases, thus reducing the mechanical strength of tantalum wire. The specific performance is that the tantalum wire will break or fall off from the tantalum capacitor if it is slightly stressed. The tantalum wire is bent 90° and then restored to its original position. The average bending times of tantalum wire on the market is less than 1.5 times, which will break, seriously affecting the use of tantalum wire.
Specific for, will lower melting point and its itself or its oxide easily react with water or acid metal as a deoxidizer and forming technology of tantalum in vacuum sintering together, make part of tantalum oxidation DNA, DNA is completed to continue under the vacuum state temperature sintering of tantalum and tantalum powder crystal, so as to improve the mechanical strength of tantalum wire.
