Method for spraying coloring film on surface of ferrite magnet
A ferrite magnet and surface spraying technology, which is applied in the field of spraying a colored film on the surface of a ferrite magnet, and can solve problems such as insufficient material research.
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Embodiment 1
[0017] The strontium ferrite calcined powder containing 0.2% by weight of alumina is made into a size of 23 mm × 10 mm × 8 mm, and then sintered in the range of 1100°C to 1150°C to achieve a sintered density of 4.6 to 4.9g / cm 3 . The density of this sintered body is 0.05g / cm 3 The interval is divided into 6 levels and applied by the flow dipping method. Firstly, the temperature is raised to 280°C for 8 minutes, and after 5 minutes at 280°C, it is immersed in the flowing powder of nylon 12. After the powder is melted into a film for about 4 seconds, it is immediately cooled in water at 10°C to produce the finished product.
[0018] By investigating the state of generation of cracks and coating film bubbles at this time, the number of failures and the number of passes were summarized, and Table 1 was obtained.
[0019] Table 1 Condition of sintering density layered coating film (the ones containing cracks and bubbles are counted as cracks)
[0020] Sintered density g / cm 3
[0021] ...
Embodiment 2
[0023] The strontium ferrite calcined powder containing 0.2% by weight of alumina is made into a size of 60 mm × 40 mm × 30 mm in outer diameter, and then sintered in the range of 1100°C to 1150°C to achieve a sintered density of 4.6 to 4.9g / cm 3 . The density of this sintered body is 0.05g / cm 3 The interval is divided into 6 levels and applied by the flow dipping method. Firstly, the temperature is raised to 280°C for 20 minutes, and after 5 minutes at 280°C, it is immersed in the flowing powder of nylon 12. After the powder is melted into a film for about 4 seconds, it is immediately cooled in water at 35°C to produce the finished product.
[0024] By investigating the state of generation of cracks and coating film bubbles at this time, the number of failures and the number of passes were summarized, and Table 1 was obtained.
[0025] Table 1 Condition of sintering density layered coating film (the ones containing cracks and bubbles are counted as cracks)
[0026] Sintered den...
Embodiment 3
[0028] Change the particle size of the ferrite powder to 0.6~1.1μm, and the calcined barium ferrite powder containing 0.3% by weight of alumina is made into an outer diameter of 20 mm × 8 mm × 8 mm, and then the temperature is in the range of 1050°C to 1100°C Internal sintering makes the sintered density reach 4.6 to 4.9g / cm 3 . The density of this sintered body is 0.05g / cm 3 The interval is divided into 6 levels and applied by the flow dipping method. Firstly, the temperature is raised for 8 minutes to 270°C, and after 5 minutes at 270°C, it is immersed in the flowing powder of nylon 12. After the powder is melted into a film for about 4 seconds, the finished product is immediately cooled in water at 10°C.
[0029] By investigating the state of generation of cracks and coating film bubbles at this time, the number of failures and the number of passes were summarized, and Table 1 was obtained.
[0030] Table 1 Condition of sintering density layered coating film (the ones containin...
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