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Mutual amount scattered quarter-phase type ferrite composite material, carrier grain, development manner null of dry type development agent composition, and electrostatic
Mutual amount scattered quarter-phase type ferrite composite material, carrier grain, development manner null of dry type development agent composition, and electrostatic
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机译：互散四分之一相型铁氧体复合材料，载体颗粒，干式显影剂组合物的显影方式无效和静电
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摘要
Disclosed is an interdispersed two-phase ferrite composite which comprises, as a ferromagnetic phase, a magnetically hard ferrite material having a hexagonal crystalline structure of the general formula R.sub.x P. sub.(1-x) Fe.sub.12 O.sub.19 where R is selected from rare earth elements, P is selected from the group consisting of strontium, barium, lead, calcium and mixtures thereof and x has a value of from about 0.1 to about 0.4 exhibiting a coercivity of at least 300 Oersteds when magnetically saturated and an induced magnetic moment of at least 20 EMU/g when in an applied magnetic field of 1000 Oersteds and, as a ferroelectric phase, a ferroelectric material comprised of at least one of the double oxides of titanium, zirconium, tin, hafnium or germanium and either an alkaline earth or lead or cadmium, in which the mole ratio of the ferromagnetic phase to the ferroelectric phase is from about 1:1 to about 1:4.P PAlso disclosed are carrier particles formed from magnetized particles of the composite which optionally can be polymerically coated, an electrostatic two-component dry developer composition comprising electrically insulative charged toner particles mixed with oppositely charged carrier particles formed from magnetized, and optionally polymerically coated, particles of the composite suitable for extremely high speed copying applications without the loss of copy image quality, and a method of developing an electrostatic image by contacting the image with a two-component dry developer composition described above.
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机译：公开了一种相互分散的两相铁氧体复合物，其包括作为铁磁性相的，具有通式R x P.sub。（1-x）Fe.sub.12的六方晶体结构的硬磁铁氧体材料。 O.sub.19，其中R选自稀土元素，P选自锶，钡，铅，钙及其混合物，并且x的值约为0.1-0.4，矫顽力至少为磁饱和时为300奥斯特，当施加的磁场为1000奥斯特时，感应磁矩至少为20 EMU / g，并且作为铁电相的铁电材料包括钛，锆和钛的至少一种双氧化物，锡，ha或锗以及碱土或铅或镉，其中铁磁相与铁电相的摩尔比为约1：1至约1：4。由磁化颗粒形成的颗粒一种复合材料，可以任选地进行聚合物涂覆，包括静电绝缘的调色剂颗粒和静电带电的两组分干式显影剂组合物，所述调色剂颗粒与由带磁的，任选地进行聚合物涂覆的复合材料颗粒形成的带相反电荷的载体颗粒混合，所述复合颗粒适于极高速复印应用，而不会损失复印图像质量，以及通过使图像与上述的两组分干显影剂组合物接触而显影静电图像的方法。
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