Low-density carrier core material for electrostatic image developer and preparation method thereof and carrier and application thereof
A technology for electrostatic image development and carrier core material, which is applied in the directions of developer, electrography, optics, etc., can solve the problems of unsatisfactory dispersion state, uneven gap, low temperature, etc., achieves difficult to develop spots and simple process method. , the effect of uniform internal voids
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Example Embodiment
[0018] (Example 1)
[0019]
[0020] 2600g ferric citrate, 218g Mn 3 O 4 , 24g MgO, 13g SrO as the carrier core material, dispersed into 3000g water, while adding 10g polyacrylic acid as a dispersant, 30g polyvinyl alcohol as a binder, wet pulverized the slurry with a wet ball mill to volume average The particle size is 1um or less, and a mixed slurry of the above-mentioned materials is obtained. Use a spray dryer to spray the slurry into hot air at 250°C to dry it. The air pressure is 0.15MPa to obtain dry particles with a particle size of 10-100um. The coarse and fine particles are removed by sieving and classification to adjust the particle size. This granulated powder Adjust the particle size to 20-60um.
[0021]
[0022] The metal raw material mixed granulated powder is put into an electric furnace, heated to 800-1000°C, and calcined in the atmosphere for 2 hours to become a calcined product. At this time, the citric acid ligand liberated by the iron citrate complex is burne...
Example Embodiment
[0025] (Example 2)
[0026] Except that the amount of ferric citrate was changed to 1530 g, other conditions were the same as in Example 1, and the carrier core material of Example 2 was obtained.
Example Embodiment
[0027] (Example 3)
[0028] Except that the amount of ferric citrate was changed to 3690 g, other conditions were the same as in Example 1, and the carrier core material of Example 3 was obtained.
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