A kind of preparation method of silver tungsten carbide contact alloy containing copper oxide additive
A silver tungsten carbide and copper oxide technology, which is applied to contacts, electrical components, electrical switches, etc., can solve the problems of complex process, unsatisfactory arc ablation resistance and temperature rise performance of alloys, cumbersome preparation process, etc. The process is simple, the amount of silver is saved, and the effect of easy processing and molding
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0041] Step 1, first add Cu powder to HNO with a mass fraction of 40% 3 fully dissolved in the solution to produce 1mol / L Cu(NO 3 ) 2 solution; then Cu(NO 3 ) 2 The solution was slowly added to 1mol / L AgNO 3 In an aqueous solution, a mixed solution A is obtained;
[0042]Step 2. Add polyvinylpyrrolidone solution with a concentration of 0.4mol / L to the mixed solution A, stir evenly, then add 1.5mol / L ascorbic acid solution therein, and keep stirring evenly to obtain mixed solution B;
[0043] Step 3. The mixed solution B was ultrasonically stirred at 55°C for 1 hour, and the pH value of the solution was adjusted to 8 by dropping ammonia water during the process, and then stirred for 1 hour after the dropping was completed, until the precipitation was complete, and the precipitated product was obtained;
[0044] Step 4. First put the precipitated product in a vacuum drying oven and dry it at 90°C until the water evaporates to obtain a dry powder; then put the dry powder int...
Embodiment 2
[0049] Step 1, first add Cu powder to HNO with a mass fraction of 50% 3 fully dissolved in the solution to produce 1mol / L Cu(NO 3 ) 2 solution; then Cu(NO 3 ) 2 The solution was slowly added to 1mol / L AgNO 3 In an aqueous solution, a mixed solution A is obtained;
[0050] Step 2. Add a polyvinylpyrrolidone solution with a concentration of 0.5mol / L to the mixed solution A, stir evenly, then add a 2mol / L ascorbic acid solution therein, and keep stirring evenly to obtain a mixed solution B;
[0051] Step 3. The mixed solution B was ultrasonically stirred at 65°C for 2 hours, and the pH value of the solution was adjusted to 8.5 by dropping ammonia water during the process, and then stirred for 1.5 hours after the dropping was completed until the precipitation was complete, and the precipitated product was obtained;
[0052] Step 4. First put the precipitated product in a vacuum drying oven and dry it at 80°C until the water evaporates to obtain a dry powder; then put the drie...
Embodiment 3
[0057] Step 1, first add Cu powder to HNO with a mass fraction of 60% 3 fully dissolved in the solution to produce 1mol / L Cu(NO 3 ) 2 solution; then Cu(NO 3 ) 2 The solution was slowly added to 1mol / L AgNO 3 In an aqueous solution, a mixed solution A is obtained;
[0058] Step 2. Add a 0.6mol / L polyvinylpyrrolidone solution into the mixed solution A, stir evenly, then add 2.5mol / L ascorbic acid solution therein, and keep stirring evenly to obtain the mixed solution B;
[0059] Step 3. The mixed solution B was ultrasonically stirred at 75°C for 2 hours, and the pH value of the solution was adjusted to 10 by dropping ammonia water during the process, and then stirred for 2 hours after the dropping was completed until the precipitation was complete, and the precipitated product was obtained;
[0060] Step 4. First put the precipitated product in a vacuum drying oven and dry it at 90°C until the water evaporates to obtain a dry powder; then put the dried powder in a muffle fu...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More