Preparation method of sendust core with high direct current bias characteristic
A high DC bias, sendust technology, applied in the manufacture of inductors/transformers/magnets, magnetic materials, magnetic objects, etc., can solve the problems that conventional sendust magnetic powder cores cannot meet low loss, and achieve improved DC bias characteristics, uniform distribution of air gaps, and improvement of out-of-synchronization problems
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Embodiment 1
[0026] A method for preparing a high DC bias characteristic sendust magnetic powder core, which comprises the following steps:
[0027] (1) Prepare powder core powder: mix low-hardness plastic metal powder into sendust metal powder, so that the metal powder is evenly distributed in sendust powder, wherein, sendust metal powder and low-hardness plastic metal powder are calculated according to weight The ratio is 100:1 to prepare, take -200 mesh sendust metal powder 500g, low hardness plastic metal powder 5g;
[0028] (2) Passivation treatment: add a passivating agent to the prepared powder core powder for passivation treatment, and the amount of passivating agent is 0.1% of the weight of the powder core powder;
[0029] (3) Compression molding: add binder, insulating agent, and lubricant to the mixed metal powder after passivation treatment, and then press molding under a pressure of 1750MPa. The amount of binder is 0.5% of the weight of the powder core powder , the amount of ...
Embodiment 2
[0038] A method for preparing a high DC bias characteristic sendust magnetic powder core, which comprises the following steps:
[0039] (1) Prepare powder core powder: mix low-hardness plastic metal powder into sendust metal powder, so that the metal powder is evenly distributed in sendust powder, wherein, sendust metal powder and low-hardness plastic metal powder are calculated according to weight The ratio is 100:1 to prepare, take -200 mesh sendust metal powder 500g, low hardness plastic metal powder 5g;
[0040] (2) Passivation treatment: add a passivating agent to the prepared powder core powder for passivation treatment, and the amount of passivating agent is 0.1% of the weight of the powder core powder;
[0041] (3) Compression molding: add binder, insulating agent, and lubricant to the mixed metal powder after passivation treatment, and then press molding under a pressure of 800MPa. The amount of binder is 0.5% of the weight of the powder core powder , the amount of i...
Embodiment 3
[0054] A method for preparing a high DC bias characteristic sendust magnetic powder core, which comprises the following steps:
[0055] (1) Prepare powder core powder: mix low-hardness plastic metal powder into sendust metal powder, so that the metal powder is evenly distributed in sendust powder, wherein, sendust metal powder and low-hardness plastic metal powder are calculated according to weight Ratio 100:0.1 to prepare, take -200 mesh sendust metal powder 500g, low hardness plastic metal powder 0.5g;
[0056] (2) Passivation treatment: add a passivating agent to the prepared powder core powder for passivation treatment, and the amount of passivating agent is 0.1% of the weight of the powder core powder;
[0057] (3) Compression molding: add binder, insulating agent, and lubricant to the mixed metal powder after passivation treatment, and then press molding under a pressure of 1750MPa. The amount of binder is 0.5% of the weight of the powder core powder , the amount of ins...
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