A kind of low-cost molybdenum disilicide and preparation method thereof
A low-cost molybdenum disilicide technology, applied in the direction of metal silicide, can solve the problems of high price and high raw material cost, and achieve the effects of less impurities, lower production costs and high purity
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Embodiment 1
[0029] (1) MoS with a purity of 98% and a particle size of less than 0.05mm 2 Powder and Si powder with a purity of 99.99% and a particle size of less than 0.05mm are mixed in a molar ratio of 1:4, and the total mass of the powder sample is 5g. Add alcohol to grind, mix evenly, and dry to obtain a uniformly mixed powder raw material.
[0030] (2) Press the powder raw material obtained in (1) into a cylindrical block with a diameter of 18 mm at room temperature with a pressure of 5 MPa.
[0031] (3) Under the protective atmosphere of argon, put the bulk raw material obtained in (2) into the furnace, and keep the temperature at 1600° C. for 1 hour.
[0032] (4) After the heat preservation is over, take out the argon blowing cooling in the room temperature to obtain molybdenum disilicide (molecular formula is MoSi 2 ), its purity is 98.7%, and the XRD diffraction pattern is as figure 1 .
Embodiment 2
[0034] (1) MoS with a purity of 96% and a particle size of less than 0.1mm 2 Powder and Si powder with a purity of 98% and a particle size of less than 0.1mm are mixed in a molar ratio of 1:4, and the total mass of the powder sample is 5g. Add alcohol to grind, mix evenly, and dry to obtain a uniformly mixed powder raw material.
[0035] (2) Under an argon protective atmosphere, the powder raw material obtained in (1) is heated up with the furnace, and the calcination temperature is 1200° C. for 4 hours.
[0036] (3) At the end of the heat preservation, cool with the furnace to obtain molybdenum disilicide (molecular formula is MoSi 2 ), with a purity of 96.3%.
Embodiment 3
[0038] (1) MoS2 powder with a purity of 98% and a particle size of less than 0.01mm and a Si powder with a purity of 99% and a particle size of less than 0.01mm are compounded in a molar ratio of 1:4, and the total mass of the powder sample is 5g. Add alcohol to grind, Mix evenly and dry to obtain a uniformly mixed powder raw material.
[0039] (2) Press the powder raw material obtained in (1) into a cylindrical block with a diameter of 18 mm at room temperature with a pressure of 10 MPa.
[0040] (3) Under the protective atmosphere of argon gas, put the bulk raw material obtained in (2) into the furnace, and keep the temperature at 1000° C. for 5 hours for calcination.
[0041] (4) After the heat preservation is completed, take out the room temperature and blow with argon to cool, and obtain molybdenum disilicide (molecular formula is MoSi2), and its purity is 98.2%.
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Abstract
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