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A method for in-situ generation of multi-crystal grains on the surface of zirconia ceramics

A zirconia ceramic, in-situ generation technology, applied in the field of surface modification of ceramic materials, can solve the problems of low bonding strength, combination of coating and substrate, high processing cost, etc., to improve bonding performance and increase biocompatibility sexual effect

Active Publication Date: 2017-02-22
华植医疗器材(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(3) Laser etching: it can increase the surface roughness, but after laser treatment, the mechanical properties of zirconia, especially whether the anti-aging performance and fatigue resistance are affected, need to be further tested
(7) Carbonate-containing hydroxyapatite coating on the surface: Implants with HA coating exhibit good osteoconductivity in the early stage of bone formation, but there is also the problem of bonding between the coating and the substrate
It overcomes the problems of difficult surface treatment, low bonding strength and high processing cost caused by high strength of zirconia

Method used

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  • A method for in-situ generation of multi-crystal grains on the surface of zirconia ceramics
  • A method for in-situ generation of multi-crystal grains on the surface of zirconia ceramics
  • A method for in-situ generation of multi-crystal grains on the surface of zirconia ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1. Take 100 milliliters of hydrofluoric acid, and put the partially stabilized zirconia green body which is not densely sintered into it for 30 seconds;

[0050] 2. Take 100 ml of calcium chloride (0.1mol / L), and put the green body in step 1 into it for 1 minute and 30 seconds;

[0051] 3. Take 100 ml of sodium hydroxide (1mol / L), put the green body in step 2 into it for 2 hours, and heat it in a water bath at 80°C;

[0052] 4. Conventional dense sintering (1450°C) after drying, observe the surface morphology of the zirconia ceramic composite under a scanning electron microscope, see figure 1 .

Embodiment 2

[0054] 1. Take 100 milliliters of hydrofluoric acid, and put the partially stabilized zirconia green body which is not densely sintered into it for 30 seconds;

[0055] 2. Take 100 ml of calcium chloride (3mol / L), and put the green body in step 1 into it for 1 minute and 30 seconds;

[0056] 3. Take 100 ml of sodium hydroxide (1mol / L), put the green body in step 2 into it for 2 hours, and heat it in a water bath at 80°C;

[0057] 4. Conventional dense sintering (1450°C) after drying, observe the surface morphology of the zirconia ceramic composite under a scanning electron microscope, see figure 2

Embodiment 3

[0059] The light-cured composite resin column was bonded to the zirconia ceramic specimen of Example 1 through ethyl α-cyanoacrylate. After the conventional shear test, the fracture mode of the specimen was observed with a scanning electron microscope. and the resin side ( image 3 A and B).

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Abstract

The invention relates to an in-situ generation method of multiple grains on a zirconia ceramic surface, and belongs to the technical field of ceramic material surface modification. According to the characteristics that a zirconia ceramic material has relatively higher porosity and poor chemical stability before being densely sintered but the chemical reaction easily occurs, a multi-grain structure tightly combined with a substrate is generated on the zirconia ceramic surface in situ through the chemical reaction, precipitation and sintering crystallization and other processes, so that the ceramic material surface is modified, the surface adhesive property is effectively improved, and the biocompatibility of zirconia ceramic is improved.

Description

technical field [0001] The invention belongs to the technical field of surface modification of ceramic materials, and relates to a preparation method of chemical reaction and high-temperature crystallization to generate multi-crystal grains in situ, so as to improve the surface properties of ceramic materials and promote the application of ceramic materials in the fields of medicine and engineering. Background technique [0002] Zirconia ceramics have attracted much attention due to their aesthetics, good biocompatibility and biosafety. At present, they have been widely used in oral fixed restorations, implants and artificial joints. Zirconia has the closest aesthetic effect to natural teeth. Compared with the worrying problems such as host immune response, release of metal elements, allergic reaction, soft tissue coloring and MRI image distortion caused by oral metal materials, it has incomparable advantages. Zirconia for oral restoration is mainly processed into the shape ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/87
Inventor 张祖太田月明张玲玲丁宁刘艳
Owner 华植医疗器材(北京)有限公司