Novel double-layer film coated magnetic conductive alloy powder, preparation method and application

Abstract

The invention provides novel double-layer film coated magnetic conductive alloy powder as well as a preparation method and application thereof. The preparation method of the double-layer film coated magnetic conductive alloy powder comprises the following steps: taking magnetic conductive alloy powder as a matrix, preparing a magnesium-iron layered double-metal hydroxide on the surface of the matrix by using a hydrothermal synthesis method to serve as a middle layer, and then preparing a hydroxyapatite film layer on the outermost layer by using a sol-gel method, so as to obtain the double-layer film coated magnetic conductive alloy powder. And then the magnetic conductive alloy powder coated with the hydroxyapatite / magnesium-iron bimetal oxide double-layer film is obtained through sintering, wherein the magnetic conductive alloy powder coated with the double-layer film has excellent mechanical properties. Cell experiments prove that the magnetic conductive powder coated with the double-layer film is non-toxic and has good biocompatibility, and can be used for cleaning teeth under a magnetic control condition, specifically, the magnetic conductive powder moves relative to a tooth crown under the action of a magnetic field, the tooth crown is polished, and the tooth crown is cleaned. The tooth cleaning device can be used for comprehensively cleaning tooth surfaces, adjacent surface gaps between teeth and pit, groove and point gaps on the tooth surfaces and effectively removing bacterial plaque.

Description

technical field [0001] The invention belongs to the field of material processing, and in particular relates to a novel double-layer film-coated magnetic permeable alloy powder, a preparation method and an application. Background technique [0002] At present, the method of cleaning teeth in the world is mainly the crown polishing method, specifically, the tooth surface is polished at a low speed by rubber cups and polishing paste, or the tooth surface is polished by supragingival and subgingival sandblasting, but due to the different shapes of the tooth surface and the root Due to the existence of anatomical structures, it is difficult to remove the irritants inside the teeth and in the crevices of the teeth. Observed by optical microscope and scanning electron microscope, there are often deep scratches on the surface of cleaned teeth, which are easy for plaque to adhere and The formation of calculus nuclei, which will lead to rapid growth of dental calculus, leading to peri...

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Problems solved by technology

[0002] At present, the method of cleaning teeth in the world is mainly the crown polishing method, specifically, the tooth surface is polished at a low speed by rubber cups and polishing paste, or the tooth surface is polished by supragingival and subgingival sandblasting, but due to the different shapes of the tooth surface and the root Due to the existence of anatomical structures, it is difficult to remove the irritants inside the teeth and in the crevices of the teeth. Observed by optical microscope and scanning electron microscope, there are often deep scratches on the surface of cleaned teeth, which are easy for plaque to adhere and The formation of calculus nuclei, which will lead to rapid growth of dental calculus, leading to periodontal inflammation

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