A kind of high pressure resistant tantalum powder and its preparation method
A technology of tantalum powder and breakdown voltage, which is applied in the field of high-voltage resistant tantalum powder and its preparation, can solve the problems of unable to meet the requirements of high-capacity tantalum powder, coarse particles, and low specific volume
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Embodiment 1
[0083] Using high-purity tantalum ingots with a purity of 4N as raw materials, hydrogenation is carried out first. Hydrogenation process conditions: put high-purity tantalum ingots into a cleaned stainless steel crucible, then hoist them into the reaction bomb, and evacuate to 1×10 2 Below Pa, then filled with hydrogen to 1.0×10 5 Pa. Heat to raise the temperature, when the temperature rises to 800°C, keep the temperature for 3 hours. Pay close attention to the internal pressure of the bomb during the heating process, and it must not exceed 2.0×10 5 Pa, in order to prevent excessive pressure from cracking the hose and causing hydrogen leakage. After the heat preservation is over, power off and cool down for hydrogenation, and hydrogen will be replenished in time during the cooling process until the tantalum ingot no longer absorbs hydrogen. Then take out the hydrogenated tantalum ingot and put it into a mill and sieve machine for grinding and sieving to make powder. The ave...
Embodiment 2
[0092] Using high-purity tantalum ingots with a purity of 4N as raw materials, hydrogenation is carried out first. Hydrogenation process conditions: put high-purity tantalum ingots into a cleaned stainless steel crucible, then hoist them into the reaction bomb, and evacuate to 1×10 2 Below Pa, then filled with hydrogen to 1.0×10 5 Pa. Heat to raise the temperature, when the temperature rises to 800°C, keep the temperature for 3 hours. Pay close attention to the internal pressure of the bomb during the heating process, and it must not exceed 2.0×10 5 Pa, in order to prevent excessive pressure from cracking the hose and causing hydrogen leakage. After the heat preservation is over, power off and cool down for hydrogenation, and hydrogen will be replenished in time during the cooling process until the tantalum ingot no longer absorbs hydrogen. Then take out the hydrogenated tantalum ingot and put it into a mill and sieve machine for grinding and sieving to make powder. The ave...
Embodiment 3
[0101] Using high-purity tantalum ingots with a purity of 4N as raw materials, hydrogenation is carried out first. Hydrogenation process conditions: put high-purity tantalum ingots into a cleaned stainless steel crucible, then hoist them into the reaction bomb, and evacuate to 1×10 2 Below Pa, then filled with hydrogen to 1.0×10 5 Pa. Heat to raise the temperature, and when the temperature rises to 850°C, keep the temperature for 3 hours. Pay close attention to the internal pressure of the bomb during the heating process, and it must not exceed 2.0×10 5 Pa, in order to prevent excessive pressure from cracking the hose and causing hydrogen leakage. After the heat preservation is over, power off and cool down for hydrogenation, and hydrogen will be replenished in time during the cooling process until the tantalum ingot no longer absorbs hydrogen. Then take out the hydrogenated tantalum ingot and put it into a mill and sieve machine for grinding and sieving to make powder. The F...
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Abstract
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