阅读说明：本技术 一种陶瓷基体表面处理方法 (Ceramic matrix surface treatment method ) 是由 卢静 汤烈明 解路 李挺 于 2020-06-22 设计创作，主要内容包括：本发明提供了一种陶瓷基体表面处理方法,将所需成分的固态粉末混合后,利用一定温度和压力的高能气体将混合粉末加热和加速,使粉末颗粒以熔化、熔融或全固态的形式撞击陶瓷基体,在其表面形成表面层,本发明提供的陶瓷基体表面处理方法,采用固体粉末混合物代替传统的浆料,避免传统浆料配置过程中的分散性、黏度、流动性等问题；采用一定压力和温度的高能气体对粉末进行加热和加速,使其撞击基体形成涂层,代替传统的浆料涂覆、固化、烧结等工艺,可以大量减少传统浆料烧结方法的工序,提高制备效率,且表面层结合稳固、组织结构可控、厚度可控。(The invention provides a ceramic matrix surface treatment method, which comprises the steps of mixing solid powder of required components, heating and accelerating the mixed powder by using high-energy gas with certain temperature and pressure, so that powder particles impact a ceramic matrix in a melting, melting or full-solid mode, and a surface layer is formed on the surface of the ceramic matrix; the powder is heated and accelerated by high-energy gas with certain pressure and temperature to impact a substrate to form a coating, the traditional slurry coating, curing, sintering and other processes are replaced, the procedures of the traditional slurry sintering method can be greatly reduced, the preparation efficiency is improved, and the surface layer is firmly combined, the tissue structure is controllable, and the thickness is controllable.)

1. A method for treating the surface of a ceramic substrate, comprising the steps of:

mixing inorganic powder particles, wherein the inorganic powder particles comprise Ag and Al₂O₃、SiO₂CaO and ZrO₂At least one of;

treating the ceramic matrix;

and spraying the mixed inorganic powder particles on the surface of the substrate to form a surface layer.

2. A ceramic substrate surface treatment method according to claim 1, wherein the inorganic powder particles have a particle size of 1 to 200 μm.

3. Ceramic substrate surface treatment process according to claim 2, characterised in that the inorganic powder particles further comprise CaO and/or ZrO₂Said Al₂O₃The content of (A) is 5-80 wt.%, SiO₂The content of (A) is 5-80 wt.%, the content of Ag is 0-20 wt.%, the content of CaO is 0-20 wt.%, and the content of ZrO2 is 0-40 wt.%.

4. The ceramic substrate surface treatment method according to claim 3, wherein the inorganic powder particles further comprise K₂O、TiO₂And Na₂O, the SiO₂70.11 wt.%, the Al₂O₃Content 20.14 wt.%, said K₂The O content is 2.87 wt.%, the CaO content is 0.49 wt.%, and the rest is TiO₂And Na₂O; or the inorganic powder particles further comprise K₂O、TiO₂And Na₂O，SiO₂Content 64 wt.%, Al₂O₃Content 10.51 wt.%, K₂O content of 2.76 wt.%, CaO content of 11.5 wt.%, and the balance of ZrO₂、TiO₂And Na₂O; or the inorganic powder particles further comprise K₂O、TiO₂And Na₂O，SiO₂Content 72.89 wt.%, Al₂O₃Content 13.17 wt.%, K₂O content of 5.83 wt.%, CaO content of 0.58 wt.%, and the balance ZrO₂、TiO₂And Na₂O。

5. A ceramic substrate surface treatment as defined in claim 1, wherein the ceramic substrate is treated by a method comprising water washing, acid-base etching, sensitization or roughening.

6. A ceramic substrate surface treatment method as defined in claim 1, wherein in the step of spraying the mixed inorganic powder particles onto the substrate surface to form the surface layer, the spraying is plasma spraying, supersonic flame spraying or cold gas dynamic spraying.

7. A surface treatment method for a ceramic substrate according to claim 1, wherein in the step of spraying the mixed inorganic powder particles onto the surface of the substrate to form the surface layer, the powder is transported by solid state transport or suspension transport.

8. The method for surface treatment of a ceramic substrate according to claim 7, wherein the pressure of spraying is 0.2 to 5MPa, the temperature of spraying is room temperature to 1000 ℃, and the distance of spraying is 10 to 300 mm.

9. A ceramic substrate surface treatment method as defined in claim 1, wherein the surface layer has a thickness of 0.02mm to 50 mm.

Technical Field

The invention relates to the technical field of surface treatment, in particular to a ceramic matrix surface treatment method.

Background

At present, in the industrial production processes of ceramic glaze layer coating sintering, electronic slurry sintering, ceramic filter membrane slurry sintering and the like, the technologies of sol dipping, pulling, sintering, spin coating, sintering, wet spraying, sintering and the like are usually adopted. The common key process of these technologies is slurry sintering. The process involved in slurry sintering includes: slurry placement, coating, curing, sintering, etc., which present some unavoidable disadvantages, including:

(1) in the slurry preparation process, substances such as a dispersing agent, a retarder and the like need to be added to control the properties such as the fluidity, the dispersibility, the viscosity and the like of the slurry. If the components and the contents are not properly arranged, problems such as poor slurry fluidity and uneven coverage are caused. The requirements for the preparation of the slurry are high.

(2) The slurry preparation process has high requirements on the environment. For example, in summer, when the humidity is high, such as more than 30%, it is difficult to prepare a qualified slurry.

(3) When the sintering temperature of the slurry reaches 500 ℃ or even above 1000 ℃, part of substances in the slurry can generate unfavorable transformation such as phase change.

(4) During the multi-layer coating, curing and sintering of the slurry, the defects of cracks, large holes and the like caused by thermal stress and unevenness are easy to generate.

Disclosure of Invention

In view of the above, it is necessary to provide a surface treatment method for ceramic substrate which can replace the conventional slurry sintering.

A method for surface treatment of a ceramic substrate comprising the steps of:

mixing inorganic powder particles, wherein the inorganic powder particles comprise Ag and Al₂O₃、SiO₂CaO and ZrO₂At least one of;

treating the ceramic matrix;

and spraying the mixed inorganic powder particles on the surface of the substrate to form a surface layer.

In some of these embodiments, the inorganic powder particles have a particle size of 1 to 200 μm.

In some of these embodiments, the inorganic powder particles further comprise CaO and/or ZrO₂Said Al₂O₃The content of (A) is 5-80 wt.%, SiO₂Is 5-80 wt.%, the content of Ag is 0-20 wt.%The CaO content is 0-20 wt.%, and the ZrO2 content is 0-40 wt.%.

In some of these embodiments, the inorganic powder particles further comprise K₂O、TiO₂And Na₂O, the SiO₂70.11 wt.%, the Al₂O₃Content 20.14 wt.%, said K₂The O content is 2.87 wt.%, the CaO content is 0.49 wt.%, and the rest is TiO₂And Na₂O; or the inorganic powder particles further comprise K₂O、TiO₂And Na₂O，SiO₂Content 64 wt.%, Al₂O₃Content 10.51 wt.%, K₂O content of 2.76 wt.%, CaO content of 11.5 wt.%, and the balance of ZrO₂、TiO₂And Na₂O; or the inorganic powder particles further comprise K₂O、TiO₂And Na₂O，SiO₂Content 72.89 wt.%, Al₂O₃Content 13.17 wt.%, K₂O content of 5.83 wt.%, CaO content of 0.58 wt.%, and the balance ZrO₂、TiO₂And Na₂O。

In some of these embodiments, the ceramic matrix is treated by water washing, acid-base etching, sensitization, or roughening.

In some of the embodiments, in the step of spraying the mixed inorganic powder particles onto the surface of the substrate to form the surface layer, the spraying is plasma spraying, supersonic flame spraying or cold gas dynamic spraying.

In some embodiments, in the step of spraying the mixed inorganic powder particles on the surface of the substrate to form the surface layer, the powder is conveyed by solid conveying or suspension conveying.

In some embodiments, the spraying pressure is 0.2-5 MPa, the spraying temperature is room temperature to 1000 ℃, and the spraying distance is 10-300 mm.

In some of these embodiments, the surface layer has a thickness of 0.02mm to 50 mm.

According to the ceramic matrix surface treatment method, after solid powder of required components is mixed, the mixed powder is heated and accelerated by using high-energy gas with certain temperature and pressure, so that powder particles impact the ceramic matrix in a melting, melting or all-solid form, and a surface layer is formed on the surface of the ceramic matrix; the powder is heated and accelerated by high-energy gas with certain pressure and temperature to impact a substrate to form a coating, the traditional slurry coating, curing, sintering and other processes are replaced, the procedures of the traditional slurry sintering method can be greatly reduced, the preparation efficiency is improved, and the surface layer is firmly combined, the tissue structure is controllable, and the thickness is controllable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a flowchart showing steps of a ceramic substrate surface treatment method according to an embodiment.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "horizontal", "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

As shown in fig. 1, a ceramic substrate surface treatment method 100 according to an embodiment includes the steps of:

step S110: mixing inorganic powder particles, wherein the inorganic powder particles comprise Ag and Al₂O₃、SiO₂CaO and ZrO₂At least one of (1).

In some of these embodiments, the inorganic powder particles have a particle size of 1 to 200 μm.

In some of these embodiments, the inorganic powder particles further comprise CaO and/or ZrO₂Said Al₂O₃The content of (A) is 5-80 wt.%, SiO₂The content of (A) is 5-80 wt.%, the content of Ag is 0-20 wt.%, the content of CaO is 0-20 wt.%, and the content of ZrO2 is 0-40 wt.%.

In some preferred embodiments, the inorganic powder particles further comprise K₂O、TiO₂And Na₂O, the SiO₂70.11 wt.%, the Al₂O₃Content 20.14 wt.%, said K₂The O content is 2.87 wt.%, the CaO content is 0.49 wt.%, and the rest is TiO₂And Na₂O; or the inorganic powder particles further comprise K₂O、TiO₂And Na₂O，SiO₂Content 64 wt.%, Al₂O₃Content 10.51 wt.%, K₂O content of 2.76 wt.%, CaO content of 11.5 wt.%, and the balance of ZrO₂、TiO₂And Na₂O; or the inorganic powder particles further comprise K₂O、TiO₂And Na₂O，SiO₂Content 72.89 wt.%, Al₂O₃Content 13.17 wt.%, K₂O content of 5.83 wt.%, CaO content of 0.58 wt.%, and the balance ZrO₂、TiO₂And Na₂O。

It is understood that the above-mentioned inorganic powder particle mixing means may be simple mechanical mixing, ball mill mixing, etc.

According to the embodiment of the invention, the solid powder mixture is adopted to replace the traditional slurry as a raw material, so that the problems of dispersibility, viscosity, fluidity and the like in the traditional slurry preparation process are avoided.

Step S120: and processing the ceramic matrix.

In some of these embodiments, the ceramic matrix is treated by water washing, acid-base etching, sensitization, or roughening.

It is understood that the substrate provided by the invention is a ceramic body, and in practice, the substrate can also comprise electronic devices, automobile industry parts and other sample parts needing to be coated with the surface layer.

Step S130: and spraying the mixed inorganic powder particles on the surface of the substrate to form a surface layer.

In some of the embodiments, in the step of spraying the mixed inorganic powder particles onto the surface of the substrate to form the surface layer, the spraying is plasma spraying, supersonic flame spraying or cold gas dynamic spraying.

In some embodiments, in the step of spraying the mixed inorganic powder particles on the surface of the substrate to form the surface layer, the powder is conveyed by solid conveying or suspension conveying.

In some embodiments, the spraying pressure is 0.2-5 MPa, the spraying temperature is room temperature to 1000 ℃, and the spraying distance is 10-300 mm.

In some of these embodiments, the surface layer has a thickness of 0.02mm to 50 mm.

In the embodiment of the invention, the high-energy gas with certain pressure and temperature is adopted to heat and accelerate the powder to impact the substrate to form the coating, the traditional slurry coating, curing, sintering and other processes are replaced, and particularly for ceramic glaze sintering and ceramic slurry coating sintering, the working procedures of the traditional slurry sintering method can be greatly reduced, and the preparation efficiency is improved.

The surface layer prepared by the method is stable in combination, controllable in tissue structure and thickness.

The following are specific examples: