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A method for surface modification of ceramic materials by liquid infiltration

A technology of surface modification and bioceramic materials, which is applied in the preparation of gradient composite layer on the surface of ceramic materials and the preparation of permeate, which can solve the problems of high strength and difficult surface treatment.

Active Publication Date: 2017-06-27
华植医疗器材(北京)有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the problem of difficult surface treatment caused by the non-conductivity and high strength of bioceramics

Method used

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  • A method for surface modification of ceramic materials by liquid infiltration
  • A method for surface modification of ceramic materials by liquid infiltration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 50 ml of commercially available ethyl silicate (silica content greater than 28%), place undensified sintered partially stabilized zirconia in it for 5 minutes, dry and conventional densified sintering (1450°C), observe under a scanning electron microscope Zirconia surface morphology see figure 1 .

Embodiment 2

[0030] Take 50 ml of calcium chloride saturated solution (at room temperature), place undensified partially stabilized zirconia in it for 5 minutes, then place it in a saturated solution of sodium dihydrogen phosphate for 5 minutes, dry and repeat conventional dense sintering (1450°C ), observe the surface morphology of zirconia under a scanning electron microscope, see figure 2 .

Embodiment 3

[0032] The molar ratio of calcium chloride: sodium dihydrogen phosphate is 1.67 as the solute, deionized water as the solvent, and a saturated solution at room temperature as the permeate, and partially stabilized zirconia that has not been densely sintered is placed in it for 5 minutes, and after drying, it is conventionally Densely sintered (1450°C), Ca and P exist on the surface of zirconia, and the presence of calcium and phosphorus can improve the biological activity of zirconia, which is beneficial to the bone formation of zirconia as an implant.

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Abstract

The invention discloses a method for modifying the surface of ceramic materials through liquid infiltration, which belongs to the technical field of surface modification of bioceramic materials. One or more of metal oxides or carbides such as zirconia, alumina, silica, calcium oxide, and silicon carbide are selected as the ceramic material body before dense sintering; components to be added to the surface of the ceramic material, such as Ca , P, Si, Ti or Ag, etc. to prepare a certain concentration of penetrating liquid, use one or a combination of several penetrating liquids to soak ceramic materials separately or at the same time, and use the characteristics of high porosity of the ceramic body before dense sintering. It penetrates into the surface layer of the ceramic material, and after dense sintering, the components in the solution remain on the surface layer of the ceramic material to form a gradient composite layer to achieve the purpose of modifying the surface of the ceramic material.

Description

technical field [0001] The invention belongs to the technical field of surface modification of biological ceramic materials, and relates to a method for preparing an infiltration solution and a method for preparing a gradient composite layer on the surface of a ceramic material, so as to improve the surface properties of the ceramic material and promote the application of the ceramic material in the medical field. Background technique [0002] Ceramic materials such as zirconia, alumina, and glass ceramics have attracted much attention due to their aesthetic appearance, good biocompatibility, and biosafety. They have been widely used in oral indirect fillings, fixed restorations, implants, and artificial joints. The zirconia used for restoration is mainly processed into the shape of the restoration body with the pre-sintered zirconia body, and then densely sintered to achieve high strength, which is applied to oral restoration. [0003] Because ceramics are a kind of biologi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/85C04B41/84
Inventor 张祖太丁宁郑东翔刘艳何敏
Owner 华植医疗器材(北京)有限公司