阅读说明：本技术 涂层结合紧密的陶瓷板及其制备方法 (Ceramic plate with tightly combined coating and preparation method thereof ) 是由 夏铭 于 2020-12-22 设计创作，主要内容包括：本发明公开了涂层结合紧密的陶瓷板及其制备方法,包括陶瓷基板和涂层；所述陶瓷基板的表面为经过粗糙化处理的微孔面；所述涂层涂覆在陶瓷基板表面,且所述涂层渗透至微孔内。本发明的涂层结合紧密的陶瓷板,通过对陶瓷基板的表面进行粗糙化处理,大大提高涂层和陶瓷基板的结合面积以及结合力,避免涂层脱落,保证对陶瓷基板的保护作用。(The invention discloses a ceramic plate with tightly combined coating and a preparation method thereof, wherein the ceramic plate comprises a ceramic substrate and a coating; the surface of the ceramic substrate is a roughened micropore surface; the coating is coated on the surface of the ceramic substrate, and the coating penetrates into the micropores. According to the ceramic plate with the tightly combined coating, the surface of the ceramic substrate is roughened, so that the combination area and the combination force of the coating and the ceramic substrate are greatly improved, the coating is prevented from falling off, and the protection effect on the ceramic substrate is ensured.)

1. The ceramic plate with tightly combined coating comprises a ceramic substrate and a coating; the method is characterized in that: the surface of the ceramic substrate is a roughened micropore surface; the coating is coated on the surface of the ceramic substrate, and the coating penetrates into the micropores.

2. A ceramic plate with tightly bonded coating according to claim 1, wherein said ceramic substrate comprises the following raw materials in parts by weight: 20-30 parts of silicon carbide, 15-23 parts of clay, 8-12 parts of talcum powder, 1-3 parts of calcium sulfate, 2-4 parts of starch and 1-2 parts of titanium oxide.

3. A ceramic plate with tightly bonded coating according to claim 2, wherein the ceramic substrate is prepared by the following method:

a, ball milling: weighing raw materials according to a formula, putting the raw materials into a ball mill for wet ball milling, and then drying to obtain mixed powder;

b, microporation treatment: adding appropriate amount of water into the mixed powder, stirring, adding amylase, stirring at 35-45 deg.C for 30-40min, and drying to obtain microporous embryo powder;

c, press forming: and pressing and forming the blank powder to obtain the ceramic substrate.

4. A ceramic plate with a tightly bonded coating according to claim 1, wherein the coating comprises the following raw materials in parts by weight: 14-18 parts of polyurethane resin, 6-8 parts of thermosetting acrylic resin, 1-2 parts of a leveling agent, 1-3 parts of a defoaming agent, 1-2 parts of a dispersing agent and 25-35 parts of an organic solvent.

5. A ceramic plate with a tightly bonded coating according to claim 4, characterized in that: the leveling agent is a fluorine modified acrylate leveling agent, the defoaming agent is an organic silicon defoaming agent, and the dispersing agent is an alkyl ammonium salt dispersing agent.

6. A ceramic plate with a tightly bonded coating according to claim 4, characterized in that: the organic solvent comprises 3-5 parts of cyclohexanone, 6-8 parts of dimethylbenzene, 9-13 parts of butyl acetate and 6-9 parts of methyl isobutyl ketone.

7. A ceramic plate with a tightly bonded coating according to any of claims 4-6, characterized in that said coating is prepared by a method comprising:

adding polyurethane resin, thermosetting acrylic resin and a dispersing agent into a mixing cylinder, heating to 60-70 ℃, stirring for 35-40min at the rotation speed of 450-550 r/min;

II, cooling the slurry to 30-40 ℃, and grinding the slurry by using a sand mill until the fineness is below 15um to obtain a feed liquid;

and III, adding the flatting agent, the defoaming agent and the organic solvent in a stirring state, continuously stirring and uniformly mixing, and stirring at the rotating speed of 550r/min for 24-35min to obtain the composite material.

8. A preparation method of a ceramic plate with tightly combined coating is characterized by comprising the following steps:

firstly, preparing a ceramic substrate;

secondly, surface roughening treatment: wrapping the non-spraying surface of the ceramic substrate with a protective film, then placing the ceramic substrate into an acid solution for surface etching at the etching temperature of 35-55 ℃ for 25-35min, then washing with clear water, removing the protective film and drying;

thirdly, spraying the coating on the roughened spraying surface of the ceramic substrate, and drying.

9. A method for preparing a ceramic plate with a tightly bonded coating according to claim 8, wherein: the acid solution is a nitric acid solution or a sulfuric acid solution.

Technical Field

The invention relates to the technical field of ceramic plates, in particular to a ceramic plate with tightly combined coatings and a preparation method thereof.

Background

The ceramic plate has extremely strong weather resistance, and no matter sunlight, rain or moisture has any influence on the surface and the base material. The ultraviolet irradiation resistance and the color stability completely reach the international gray level of 4-5. Also, large or rapid temperature changes do not affect the properties and appearance of the material. The reasonable combination of bending strength and elasticity enables the ceramic plate to have high impact strength. The compact material surface makes dust less likely to adhere and makes cleaning easier. The ceramic plate has excellent fire resistance, does not melt, drip or explode, and is stable for a long time.

When the coating is used on the surface of the existing ceramic plate, the bonding force between the coating and the ceramic plate is small due to the compact material surface of the ceramic plate, and the coating is easy to fall off. Based on this, how to design a ceramic plate with tightly combined coating and a preparation method thereof are the technical problems to be solved by the invention.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a ceramic plate with tightly combined coating and a preparation method thereof.

The invention solves the technical problems through the following technical means:

the ceramic plate with tightly combined coating comprises a ceramic substrate and a coating; the surface of the ceramic substrate is a roughened micropore surface; the coating is coated on the surface of the ceramic substrate, and the coating penetrates into the micropores.

As an improvement of the technical scheme, the ceramic plate with the tightly combined coating is characterized in that the ceramic substrate is prepared from the following raw materials in parts by weight: 20-30 parts of silicon carbide, 15-23 parts of clay, 8-12 parts of talcum powder, 1-3 parts of calcium sulfate, 2-4 parts of starch and 1-2 parts of titanium oxide.

As an improvement of the above technical solution, the ceramic plate with tightly bonded coating layer, the preparation method of the ceramic substrate is:

a, ball milling: weighing raw materials according to a formula, putting the raw materials into a ball mill for wet ball milling, and then drying to obtain mixed powder;

b, microporation treatment: adding appropriate amount of water into the mixed powder, stirring, adding amylase, stirring at 35-45 deg.C for 30-40min, and drying to obtain microporous embryo powder;

c, press forming: and pressing and forming the blank powder to obtain the ceramic substrate.

As an improvement of the technical scheme, the coating is combined with the compact ceramic plate and comprises the following raw materials in parts by weight: 14-18 parts of polyurethane resin, 6-8 parts of thermosetting acrylic resin, 1-2 parts of a leveling agent, 1-3 parts of a defoaming agent, 1-2 parts of a dispersing agent and 25-35 parts of an organic solvent.

As an improvement of the technical scheme, the coating is combined with a compact ceramic plate, the leveling agent is a fluorine modified acrylate leveling agent, the defoaming agent is an organic silicon defoaming agent, and the dispersing agent is an alkyl ammonium salt dispersing agent.

As an improvement of the technical scheme, the coating is combined with compact ceramic plates, and the organic solvent comprises 3-5 parts of cyclohexanone, 6-8 parts of dimethylbenzene, 9-13 parts of butyl acetate and 6-9 parts of methyl isobutyl ketone.

As an improvement of the technical scheme, the coating is combined with the compact ceramic plate, and the preparation method of the coating comprises the following steps:

adding polyurethane resin, thermosetting acrylic resin and a dispersing agent into a mixing cylinder, heating to 60-70 ℃, stirring for 35-40min at the rotation speed of 450-550 r/min;

II, cooling the slurry to 30-40 ℃, and grinding the slurry by using a sand mill until the fineness is below 15um to obtain a feed liquid;

and III, adding the flatting agent, the defoaming agent and the organic solvent in a stirring state, continuously stirring and uniformly mixing, and stirring at the rotating speed of 550r/min for 24-35min to obtain the composite material.

A preparation method of a ceramic plate with tightly combined coatings comprises the following steps:

firstly, preparing a ceramic substrate;

secondly, surface roughening treatment: wrapping the non-spraying surface of the ceramic substrate with a protective film, then placing the ceramic substrate into an acid solution for surface etching at the etching temperature of 35-55 ℃ for 25-35min, then washing with clear water, removing the protective film and drying;

thirdly, spraying the coating on the roughened spraying surface of the ceramic substrate, and drying.

As an improvement of the technical scheme, the preparation method of the ceramic plate with tightly combined coating is characterized in that the acid solution is a nitric acid solution or a sulfuric acid solution.

The invention has the advantages that: according to the ceramic plate with the tightly combined coating, the surface of the ceramic substrate is roughened, so that the combination area and the combination force of the coating and the ceramic substrate are greatly improved, the coating is prevented from falling off, and the protection effect on the ceramic substrate is ensured.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is an SEM image of a ceramic substrate surface roughened according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1, referring to fig. 1 and 2, a ceramic plate with tightly bonded coatings, comprising a ceramic substrate 1 and a coating 2; the surface of the ceramic substrate 1 is a roughened micropore surface; the coating 2 is coated on the surface of the ceramic substrate 1, and the coating 2 permeates into the micropores;

the surface of the ceramic substrate 1 is roughened, so that a rough and uneven micropore structure is formed on the surface of the ceramic substrate 1, and after the coating 2 is sprayed on the ceramic substrate 1, the coating 2 permeates into micropores, so that on one hand, the bonding area of the coating 2 and the ceramic substrate 1 is greatly increased, and further, the firmness of the coating 2 after spraying is improved; more importantly, the coating 2 permeates into the micropores to form a structure similar to a root system type structure, so that the binding force between the coating 2 and the ceramic substrate 1 is greatly improved, the coating 2 is not easy to fall off after spraying, and the protection effect on the ceramic substrate 1 is ensured;

the ceramic substrate which is not subjected to roughening treatment is directly sprayed with the coating, and the coating is not easy to adhere due to the compact material surface of the ceramic substrate;

according to the ceramic plate with the tightly combined coating, the surface of the ceramic substrate is roughened, so that the combination area and the combination force of the coating and the ceramic substrate are greatly improved, the coating is prevented from falling off, and the protection effect on the ceramic substrate is ensured.

As an improvement of the technical scheme, the ceramic plate with the tightly combined coating is characterized in that the ceramic substrate is prepared from the following raw materials in parts by weight: 20-30 parts of silicon carbide, 15-23 parts of clay, 8-12 parts of talcum powder, 1-3 parts of calcium sulfate, 2-4 parts of starch and 1-2 parts of titanium oxide;

as an improvement of the above technical solution, the ceramic plate with tightly bonded coating layer, the preparation method of the ceramic substrate is:

a, ball milling: weighing raw materials according to a formula, putting the raw materials into a ball mill for wet ball milling, and then drying to obtain mixed powder;

b, microporation treatment: adding appropriate amount of water into the mixed powder, stirring, adding amylase, stirring at 35-45 deg.C for 30-40min, and drying to obtain microporous embryo powder;

c, press forming: pressing and molding the blank powder to obtain a ceramic substrate;

starch is added into the raw material of the ceramic substrate and is treated by amylase, so that the starch on the surface of the raw material is hydrolyzed, and after the hydrolysis, a microporous structure is formed on the surface of the powder raw material; on the other hand, the microporous structure is formed on the surface of the raw material powder, the specific surface area of the mixed powder can be increased, the bonding capacity between the powder is strong, the strength of the ceramic substrate is ensured, and in addition, the increase of the specific surface area enables the mixed powder to have certain adsorption capacity, so that the coating can be conveniently permeated.

As an improvement of the technical scheme, the coating is combined with the compact ceramic plate and comprises the following raw materials in parts by weight: 14-18 parts of polyurethane resin, 6-8 parts of thermosetting acrylic resin, 1-2 parts of a leveling agent, 1-3 parts of a defoaming agent, 1-2 parts of a dispersing agent and 25-35 parts of an organic solvent.

As an improvement of the technical scheme, the coating is combined with a compact ceramic plate, the leveling agent is a fluorine modified acrylate leveling agent, the defoaming agent is an organic silicon defoaming agent, and the dispersing agent is an alkyl ammonium salt dispersing agent.

As an improvement of the technical scheme, the coating is combined with compact ceramic plates, and the organic solvent comprises 3-5 parts of cyclohexanone, 6-8 parts of dimethylbenzene, 9-13 parts of butyl acetate and 6-9 parts of methyl isobutyl ketone.

As an improvement of the technical scheme, the coating is combined with the compact ceramic plate, and the preparation method of the coating comprises the following steps:

adding polyurethane resin, thermosetting acrylic resin and a dispersing agent into a mixing cylinder, heating to 60-70 ℃, stirring for 35-40min at the rotation speed of 450-550 r/min;

II, cooling the slurry to 30-40 ℃, and grinding the slurry by using a sand mill until the fineness is below 15um to obtain a feed liquid;

III, adding the flatting agent, the defoaming agent and the organic solvent in a stirring state, continuously stirring and uniformly mixing, and stirring at the rotating speed of 550r/min for 24-35min to obtain the composite material;

polyurethane resin is used as a main raw material of the coating, so that the coating has good buffering performance, a ceramic substrate has certain impact resistance after being sprayed with the coating, and the problems that the existing ceramic plate is easy to break and generate impact accumulated grains due to impact are saved; the polyurethane resin has good waterproofness, and reduces the erosion of a wet environment to the ceramic substrate; the addition of the acrylic resin further improves the water resistance of the coating, and the coating does not change color or yellow at high temperature.

A preparation method of a ceramic plate with tightly combined coatings comprises the following steps:

firstly, preparing a ceramic substrate;

secondly, surface roughening treatment: wrapping the non-spraying surface of the ceramic substrate with a protective film, then placing the ceramic substrate into an acid solution for surface etching at the etching temperature of 35-55 ℃ for 25-35min, then washing with clear water, removing the protective film and drying;

thirdly, spraying the coating on the roughened spraying surface of the ceramic substrate, and drying.

As an improvement of the above technical solution, in the preparation method of the ceramic plate with tightly bonded coating, the acidic solution is a nitric acid solution or a sulfuric acid solution;

the surface of the ceramic substrate 1 is roughened, so that a rough and uneven micropore structure is formed on the surface of the ceramic substrate 1, and after the coating 2 is sprayed on the ceramic substrate 1, the coating 2 permeates into micropores, so that on one hand, the bonding area of the coating 2 and the ceramic substrate 1 is greatly increased, and further, the firmness of the coating 2 after spraying is improved; more importantly, the coating 2 permeates into the micropores to form a structure similar to a root system type structure, so that the binding force between the coating 2 and the ceramic substrate 1 is greatly improved, the coating 2 is not easy to fall off after spraying, and the protection effect on the ceramic substrate 1 is ensured;

the ceramic substrate without roughening treatment is directly sprayed with the coating, and the coating is not easy to adhere due to the compact material surface of the ceramic substrate.

It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.