Preparation method of rod-shaped tin oxide reinforced silver-based electrical contact material
An electrical contact material, tin oxide technology, applied in circuits, electrical switches, electrical components, etc., can solve problems such as affecting electrical performance and service life, declining electrical performance of contacts, non-wetting of liquid silver, etc., to achieve good electrical conductivity. High performance, high yield and high purity
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Embodiment 1
[0030] This example is to prepare a rod-shaped tin oxide-reinforced silver-based electrical contact material containing 90% silver and 10% tin oxide (mass percentage content), and the steps are carried out in the following order:
[0031] 1. Prepare appropriate amounts of 0.1mol / L tin protochloride aqueous solution and 0.1mol / L oxalic acid aqueous solution respectively for standby;
[0032] 2. Mixed solution: According to the molar ratio of stannous chloride and oxalic acid 1:1, take a certain amount of stannous chloride aqueous solution and oxalic acid water
[0033] Solution, quickly pour the stannous chloride aqueous solution into the oxalic acid aqueous solution, use magnetic stirring to make the mixture uniform, and react at room temperature for 30 minutes;
[0034] 3. Separate the precipitate in step 2 by centrifugation, put it in an oven, and dry it at 60°C for 24 hours to obtain oxalic acid
[0035] Sn precursor;
[0036] 4. Put the stannous oxalate precursor into a ...
Embodiment 2
[0043] This example is to prepare a rod-shaped tin oxide-reinforced silver-based electrical contact material containing 90% silver and 10% tin oxide (mass percentage content), and the steps are carried out in the following order:
[0044] 1. Prepare appropriate amounts of 0.2mol / L stannous chloride aqueous solution and 0.3mol / L oxalic acid aqueous solution respectively for use;
[0045] 2. Mixed solution: According to the molar ratio of stannous chloride and oxalic acid 1:1, take a certain amount of stannous chloride aqueous solution and oxalic acid
[0046] Aqueous solution, quickly pour the stannous chloride aqueous solution into the oxalic acid aqueous solution, use magnetic stirring to make the mixture uniform, and react at room temperature for 120 minutes;
[0047] 3. Separate the precipitate in step 2 by centrifugation, put it in an oven, and dry it at 40°C for 48 hours.
[0048] Obtain stannous oxalate precursor;
[0049] 4. Put the stannous oxalate precursor into a m...
Embodiment 3
[0059]This example is to prepare a rod-shaped tin oxide-reinforced silver-based electrical contact material containing 90% silver and 10% tin oxide (mass percentage content), and the steps are carried out in the following order:
[0060] 1. Prepare suitable amounts of ethanol solution of 0.1mol / L stannous chloride and ethanol solution of 0.2mol / L oxalate respectively for use;
[0061] 2. According to the molar ratio of stannous chloride and oxalic acid 1:2, take a certain amount of stannous chloride ethanol solution and oxalate ethanol solution,
[0062] Add the stannous chloride ethanol solution drop by drop into the oxalate ethanol solution, and react for 40 minutes;
[0063] 3. Separate the precipitate in step 2 by centrifugation, put it in an oven, and dry it at 60°C for 12 hours to obtain oxalic acid
[0064] Sn precursor;
[0065] 4. Transfer the stannous oxalate precursor into a muffle furnace and calcinate at 500°C for 3 hours to obtain tin oxide powder;
[0066] 5....
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