A kind of tungsten disulfide/fly ash composite lubricant and its preparation method
A tungsten disulfide and fly ash technology, applied in chemical instruments and methods, chemical/physical processes, lubricating compositions, etc., can solve the problems of high price and preparation cost, limited application scope, low friction coefficient, etc. The effect of low cost, low cost, excellent lubricating properties
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Embodiment 1
[0024] 5g fly ash was calcined in a muffle furnace at 600 ℃ for 6h, and after cooling, the fly ash was put into a ball mill with a ratio of 3:1, and the ball was milled at 600r / min for 4h. Then, the ball-milled fly ash was immersed in 2.5g, 5mol / L hydrochloric acid for 15h, then put into 2.5g, 5mol / L potassium hydroxide solution for 12h, filtered and washed with deionized water repeatedly to Neutral, activated and modified fly ash that is easy to deposit tungsten oxide particles is obtained after drying.
[0025] Mix the activated modified fly ash with 2.5g of sodium tungstate and 1250g of water evenly, heat it up to 70°C, adjust the pH value to 2 with hydrochloric acid and initiate the reaction for 5h to generate tungsten oxide / fly ash precursor, which is filtered with The dried precursor is mixed with elemental sulfur (the weight ratio of the two is 1:20), heated and vulcanized at 350 °C for 0.2 h in a nitrogen atmosphere, and then the temperature is raised to 800 °C and kep...
Embodiment 2
[0028] 5g of fly ash was calcined in a muffle furnace at 550 ℃ for 5h, and after cooling, the fly ash was put into a ball mill with a ball-to-material ratio of 6:1, and the ball was milled at 500r / min for 3h. Then, the ball-milled fly ash was immersed in 500g, 3.5mol / L hydrochloric acid for 8h, and then put into 500g, 2mol / L potassium hydroxide solution for 8h, and after filtration, it was repeatedly washed with deionized water to medium. After drying, activated modified fly ash that is easy to deposit tungsten oxide particles can be obtained.
[0029] Mix the activated modified fly ash with 25g of ammonium tungstate and 600g of water evenly, raise the temperature to 50°C, adjust the pH value to 3 with hydrochloric acid and initiate the reaction for 10h to generate tungsten oxide / fly ash precursor, filter and dry The treated precursor is mixed with elemental sulfur (the weight ratio of the two is 1:10), heated and sulfurized at 250°C for 4h in a nitrogen atmosphere, then the t...
Embodiment 3
[0031] 5g of fly ash was calcined in a muffle furnace at 500 ℃ for 8h, and after cooling, the fly ash was put into a ball mill with a ball-to-material ratio of 5:1, and the ball was milled at 400r / min for 5h. Then, the ball-milled fly ash was immersed in 300g, 2mol / L of hydrochloric acid for 24h, then put into 300g, 3.5mol / L potassium hydroxide solution for 24h, filtered and washed repeatedly with deionized water to medium. After drying, activated modified fly ash that is easy to deposit tungsten oxide particles can be obtained.
[0032] Mix the activated modified fly ash with 15g of ammonium tungstate and 250g of water evenly, heat up to 90°C, adjust the pH value to 4 with hydrochloric acid and initiate the reaction for 7h to generate tungsten oxide / fly ash precursor, filter and dry The treated precursor is mixed with elemental sulfur (the weight ratio of the two is 1:0.2), heated and sulfurized at 445 °C for 2 hours in a nitrogen atmosphere, and then the temperature is raise...
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