A kind of capacitor impregnating liquid and preparation method thereof
A technology of impregnating liquid and capacitor, which is applied in the direction of drying/impregnating machines, etc., can solve the problems of poor oxidation resistance and low-temperature fluidity, decline in capacitor performance and service life, poor overall performance of impregnating liquid, etc., and achieve fluidity and Excellent anti-oxidation performance, low cost and stable performance
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Embodiment 1
[0023] A capacitor impregnating solution, which is prepared by weight from the following raw materials: 72 parts of tea seed oil, 23 parts of modified soybean oil, 1.28 parts of microcrystalline wax, 1.1 parts of modified diatomite, 0.32 parts of modified gypsum powder, poly 0.8 parts of tetrafluoroethylene, 1.25 parts of polyethylene wax;
[0024] The modified diatomite is prepared using the following method:
[0025] (1) Crush the diatomite, pass through a 120-mesh sieve, and use a drying oven at 225-245°C for 45-65 minutes;
[0026] (2) Soak the diatomite treated in step (1) with an oxalic acid solution with a mass fraction of 2.5% for 12-15 hours, dry the soaked diatomite at 285-300°C for 2-3 hours, and then Cool at a rate of 2°C / min, keep warm for 2-2.5 hours when the temperature drops to 190°C, then continue to cool down to room temperature at 3°C / min in a dry environment, and perform ultrafine pulverization to obtain modified diatomite.
[0027] Preferably, the modifi...
Embodiment 2
[0042] A capacitor impregnating solution, which is prepared by weight from the following raw materials: 70 parts of tea seed oil, 23 parts of modified soybean oil, 1.32 parts of microcrystalline wax, 1.15 parts of modified diatomite, 0.36 parts of modified gypsum powder, poly 0.85 parts of tetrafluoroethylene, 1.25 parts of polyethylene wax;
[0043] The modified diatomite is prepared using the following method:
[0044] (1) Crush diatomite, pass through a 120-mesh sieve, and use a drying oven to heat-preserve at 230°C for 60 minutes;
[0045] (2) Soak the diatomite treated in step (1) with an oxalic acid solution with a mass fraction of 2.5% for 13 hours, dry the soaked diatomite at 290°C for 3 hours, and then dry it at 2°C / min The temperature is lowered at a high speed, and when the temperature is lowered to 190°C, the heat preservation is continued for 2.2 hours, and then the temperature is continued to be lowered to normal temperature at a rate of 3°C / min in a dry environ...
Embodiment 3
[0049] A capacitor impregnating solution, which is prepared by weight from the following raw materials: 74 parts of tea seed oil, 24 parts of modified soybean oil, 1.28 parts of microcrystalline wax, 1.15 parts of modified diatomite, 0.28 parts of modified gypsum powder, poly 0.8 parts of tetrafluoroethylene, 1.35 parts of polyethylene wax;
[0050] The modified diatomite is prepared using the following method:
[0051] (1) Crush the diatomite, pass through a 120-mesh sieve, and use a drying oven to heat-preserve at 242°C for 50 minutes;
[0052] (2) Soak the diatomite treated in step (1) with an oxalic acid solution with a mass fraction of 2.5% for 13 hours, dry the soaked diatomite at 292°C for 2.6h, and then dry it at 2°C / min Cool down at a speed of 190°C and keep warm for 2.3 hours, then continue to cool down to room temperature at 3°C / min in a dry environment, and perform ultrafine pulverization to obtain modified diatomite.
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