Magnetic carrier particles

Details Magnetic carrier particles Magnetic carrier particles

G - Physics

03

G

G03G 9/107 (2006.01) G03G 9/10 (2006.01) G03G 13/22 (2006.01)

Patent

CA 2375307

Conductive hard magnetic carrier particles are disclosed which contain a single-phase hexagonal crystal structure doped with at least one metal that, upon substitution of said metal into said crystal structure, produces a multi-valent ion of the formula M°+, wherein n = 4,5 or 6. The carrier particles are useful in making developers for the development of electrostatic latent image patterns in an electrographic process. Also disclosed are methods for using such carrier particles in an electrographic process. Such carriers can display levels of conductivity such that the development efficiency, i.e., speed, of an electrographic process is improved.

L'invention concerne des particules support magnétiques dures et conductrices renfermant une structure cristalline hexagonale à phase unique dopée au moyen d'au moins un métal qui, au moment de la substitution dudit métal dans ladite structure cristalline, produit un ion multivalent de formule M<n+>, dans laquelle n = 4,5 ou 6. Les particules support sont utiles dans la préparation de révélateurs destinés au développement de modèles d'images latentes électrostatiques dans un procédé électrographique. L'invention concerne également des procédés d'utilisation de telles particules support dans un procédé électrographique. De tels supports peuvent afficher des niveaux de conductivité tels que l'efficacité du développement, par exemple, la vitesse, d'un procédé électrographique est améliorée.

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