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Invention Publication
CN105073644A 铁氧体颗粒及使用其的电子照相显影用载体、电子照相用显影剂以及铁氧体颗粒的制造方法 有权

铁氧体颗粒及使用其的电子照相显影用载体、电子照相用显影剂以及铁氧体颗粒的制造方法
Abstract:
本发明的铁氧体颗粒的特征在于，其是将Mn铁氧体作为主相且含有Sr铁氧体的铁氧体颗粒，颗粒表面的凹凸度为2.5μm～4.5μm的范围，显露在颗粒表面的晶粒的大小的标准偏差为1.5μm～3.5μm的范围。由此，覆盖树脂随着长期使用仍残留在颗粒表面，能够抑制带电特性的降低。
Abstract(English):

Ferrite particles having Mn ferrite as a main phase and containing Sr ferrite, the ferrite particles being characterized in that the rugosity of the particle surface is in a range of 2.5 [mu]m to 4.5 [mu]m, and the standard deviation of the size of grains appearing on the particle surface is in a range of 1.5 [mu]m to 3.5 [mu]m. The coating resin thereby remains on the particle surface even with long-term use, and a decrease in the charging characteristics can be suppressed.

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