A kind of preparation method of tungsten disulfide composite material for carbon brush
A technology of tungsten disulfide and composite materials, applied in chemical instruments and methods, carbide, silicon carbide, etc., can solve problems such as affecting the life of carbon brushes and commutators, uneven surfaces of commutators, and decreased motor efficiency. , to achieve the effect of good working stability and rectification characteristics, simple production materials, and improved operation quality
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Embodiment 1
[0026] A ingredients
[0027] Dosing according to the stated material mass percentage, tungsten trioxide, silicon carbide, sulfur, and catalyst are calculated and weighed according to the process respectively, the ratio of the mass of sulfur to the mass of tungsten trioxide is 28%, the mass of silicon carbide to the mass of tungsten trioxide The ratio of the catalyst palladium is 0.8%, and the ratio of the quality of catalyst palladium to the quality of tungsten trioxide is 0.1%;
[0028] B pre-treatment
[0029] (1) Make silicon carbide into 4g / L carbide suspension, tungsten trioxide into 15g / L suspension, add 0.5-1.5% urea or OP emulsifier as dispersant , control the pH value ≤ 5, mix and stir the two at a temperature of 25-65°C and normal pressure for 0.5-2 hours, so that tungsten is coated on the surface of silicon carbide;
[0030] (2) Prepare the precursor solution with urea and absolute ethanol at a ratio of 1:3, then add catalyst and sulfur, and stir at room temperat...
Embodiment 2
[0039] A ingredients
[0040] Dosing according to the stated material mass percentage, tungsten trioxide, silicon carbide, sulfur, and catalyst are calculated and weighed according to the process respectively, the ratio of the mass of sulfur to the mass of tungsten trioxide is 50%, the mass of silicon carbide to the mass of tungsten trioxide The ratio of 22%, the ratio of the mass of catalyst thorium to the mass of tungsten trioxide is 0.30%;
[0041] B pre-treatment
[0042] (1) Make silicon carbide into 6g / L carbide suspension, tungsten trioxide into 25g / L suspension, add OP emulsifier with 1.5% of the total amount of suspension as dispersant, and control the pH value ≤5, the two are mixed and stirred for 1 to 2 hours at a temperature of 25-55°C and normal pressure, so that tungsten is coated on the surface of silicon carbide;
[0043] (2) Prepare the precursor solution with urea and absolute ethanol at a ratio of 1:4, then add catalyst and sulfur, and stir at room tempera...
Embodiment 3
[0052] A ingredients
[0053] Calculate and weigh tungsten trioxide, silicon carbide, sulfur and catalyst respectively according to the process. The ratio of the mass of sulfur to the mass of tungsten trioxide is 79%, the ratio of the mass of silicon carbide to the mass of tungsten trioxide is 38%, and the catalyst cobalt sulfide The ratio of the mass of (CoS) and Pt to the mass of tungsten trioxide is 0.48%;
[0054] B pre-treatment
[0055] (1) Make silicon carbide into 8g / L carbide suspension, tungsten trioxide into 30g / L suspension, add 1.5% OP emulsifier in the total amount of suspension as dispersant, and control pH value≤ 5. Mix and stir the two at a temperature of 45-65°C and normal pressure for 2 hours, so that tungsten is coated on the surface of silicon carbide;
[0056] (2) Prepare the precursor solution with urea and absolute ethanol at a ratio of 1:5, then add catalyst and sulfur, and stir at room temperature for 20 minutes;
[0057] (3) Mix (1) and (2) and ag...
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