Method for carrying out surface modification on ceramic material through liquid permeation

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

Active Publication Date: 2014-01-29
BEIJING STOMATOLOGY HOSPITAL CAPITAL MEDICAL UNIV
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Problems solved by technology

It overcomes the problem of difficult surface treatment cau

Method used

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  • Method for carrying out surface modification on ceramic material through liquid permeation
  • Method for carrying out surface modification on ceramic material through liquid permeation

Examples

Experimental program
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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 relates to a method for carrying out surface medication on a ceramic material through liquid permeation, belonging to the technical field of surface modification of biological ceramic materials. The method comprises the following steps of selecting one or more of zirconium oxide, aluminum oxide, silicon dioxide, calcium oxide, silicon carbide and other metal oxides or carbides as a ceramic material blank before dense sintering; preparing a penetrating fluid with certain concentration from Ca, P, Si, Ti, Ag or the like which need to be added to the surface of the ceramic material, and soaking the ceramic material with one or combination of more of penetrating fluids respectively or simultaneously, wherein the penetrating fluid penetrates the surface of the ceramic material by using the characteristic that a ceramic blank has relatively high porosity before dense sintering, and after dense sintering, components in the solution are left on the surface layer of the ceramic material to form a gradient composite layer, so that the purpose of carrying out surface modification on the ceramic material is achieved.

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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IPC IPC(8): C04B41/85C04B41/84
Inventor 张祖太丁宁郑东翔刘艳何敏
Owner BEIJING STOMATOLOGY HOSPITAL CAPITAL MEDICAL UNIV
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