A kind of micron molybdenum powder and its preparation method and application
A micron-scale, molybdenum powder technology, used in magnetrons, instruments, optics, etc., can solve the problems of secondary pollution of molybdenum powder, unfavorable energy saving, high sintering temperature, and achieve easy removal, good economic benefits, and good dispersion. Effect
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Embodiment 1
[0064] This embodiment provides a preparation method of micron-scale molybdenum powder, and the preparation method includes the following steps:
[0065] (1) Pour air into the molybdenum-containing hybrid solid to carry out a gas-solid oxidation reaction to obtain an intermediate solid; the introduction time is 3h, the temperature is 425°C, and the heating rate is 5°C / min; The purging gas nitrogen was introduced for 16 minutes; the molybdenum-containing hybrid solid was the spherical hybrid disclosed in Example 4 in CN 107768660A;
[0066] (2) pass hydrogen into the intermediate solid obtained in step (1), carry out the first-stage gas-solid hydrogen reduction reaction and the second-stage gas-solid hydrogen reduction reaction, and then pass into the protective gas hydrogen until the molybdenum powder is completely cooled to obtain micron-scale molybdenum powder; the time of the first stage gas-solid hydrogen reduction reaction is 4.5h, the temperature is 525°C, and the heatin...
Embodiment 2
[0071] This embodiment provides a preparation method of micron-scale molybdenum powder, and the preparation method includes the following steps:
[0072] (1) Pour oxygen into the molybdenum-containing hybrid solid to carry out a gas-solid oxidation reaction to obtain an intermediate solid; the introduction time is 1h, the temperature is 300°C, and the heating rate is 3°C / min; The purging gas argon was introduced for 2 minutes; the molybdenum-containing hybrid solid was the ribbon hybrid disclosed in Example 1 in CN 107768660A;
[0073] (2) pass hydrogen into the intermediate solid obtained in step (1), carry out the first-stage gas-solid hydrogen reduction reaction and the second-stage gas-solid hydrogen reduction reaction, and then pass the protective gas nitrogen to the molybdenum powder to completely cool down to obtain micron-scale molybdenum powder; the time of the first stage gas-solid hydrogen reduction reaction is 3h, the temperature is 450°C, and the heating rate is 2...
Embodiment 3
[0078] This embodiment provides a preparation method of micron-scale molybdenum powder, and the preparation method includes the following steps:
[0079] (1) Pour air into the molybdenum-containing hybrid solid to carry out a gas-solid oxidation reaction to obtain an intermediate solid; the introduction time is 5h, the temperature is 550°C, and the heating rate is 8°C / min; The purging gas neon was introduced for 30min; the molybdenum-containing hybrid solid was the cubic hybrid disclosed in Example 6 in CN 107768660A;
[0080] (2) pass hydrogen into the intermediate solid obtained in step (1), carry out the first-stage gas-solid hydrogen reduction reaction and the second-stage gas-solid hydrogen reduction reaction, and then pass the protective gas argon until the molybdenum powder is completely cooled to obtain a micron level Molybdenum powder; the time of the first stage gas-solid hydrogen reduction reaction is 6h, the temperature is 600°C, and the heating rate is 5°C / min; th...
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