阅读说明：本技术 一种石墨烯发热陶瓷板制备工艺及石墨烯发热陶瓷板 (Preparation process of graphene heating ceramic plate and graphene heating ceramic plate ) 是由 王诗榕 王书传 张秀会 舒丰贤 王海波 于 2021-07-26 设计创作，主要内容包括：本发明涉及一种石墨烯发热陶瓷板制备工艺,包括以下步骤：步骤一、配制陶瓷泥浆；步骤二、包括以下子步骤：a、将陶瓷泥浆施加到模具中；b、模具内的陶瓷泥浆干燥至含水率3％-7％,形成下层陶瓷胚体；c、在下层陶瓷胚体上表面印制石墨烯导电油墨形成导电线路；下层陶瓷胚体上表面还设有连接导电线路的电极片；d、对下层陶瓷胚体上表面进行补水；e、在模具中继续施加陶瓷泥浆,使陶瓷泥浆完全覆盖住导电线路；f、下层陶瓷胚体和步骤e施加到模具内的陶瓷泥浆干燥后形成待烧制陶瓷胚体；g、将待烧制陶瓷胚体从模具中脱模；步骤三、将待烧制陶瓷胚体煅烧,形成石墨烯发热陶瓷板。通过本发明制得的石墨烯发热陶瓷板一体成型,使用寿命长。(The invention relates to a preparation process of a graphene heating ceramic plate, which comprises the following steps: step one, preparing ceramic slurry; step two, comprising the following substeps: a. applying a ceramic slurry to a mold; b. drying the ceramic slurry in the mold until the water content is 3% -7% to form a lower-layer ceramic blank; c. printing graphene conductive ink on the upper surface of the lower ceramic blank to form a conductive circuit; the upper surface of the lower layer ceramic blank body is also provided with an electrode plate connected with a conductive circuit; d. supplementing water to the upper surface of the lower-layer ceramic blank; e. continuously applying ceramic slurry in the mould to enable the ceramic slurry to completely cover the conducting circuit; f. drying the lower layer ceramic blank body and the ceramic slurry applied to the mold in the step e to form a ceramic blank body to be fired; g. demoulding the ceramic blank to be fired from the mould; and step three, calcining the ceramic blank to be fired to form the graphene heating ceramic plate. The graphene heating ceramic plate prepared by the method is integrally formed, and the service life is long.)

1. A preparation process of a graphene heating ceramic plate is characterized by comprising the following steps:

step one, preparing ceramic slurry, wherein the water content of the ceramic slurry is 40-55%;

step two, comprising the following substeps:

a. slowly applying the ceramic slurry prepared in the step one into a mould to prevent large bubbles from being generated in the ceramic slurry, and flattening the ceramic slurry;

the depth of the ceramic slurry is 1/4-3/4 of the depth of the mould;

b. placing the mold in an environment with the temperature range of 30-40 ℃ and the humidity range of 40-60% rh for slow drying until the ceramic slurry in the mold is dried until the water content is 3-7% to form a lower-layer ceramic blank;

c. printing graphene conductive ink on the upper surface of the lower ceramic blank to form a continuous conductive circuit, and coating waterproof oil on the conductive circuit;

two electrode plates are further arranged on the edge of the upper surface of the lower ceramic blank body, and the two electrode plates are respectively connected to two ends of the conducting circuit in a conducting manner;

d. supplementing water to the upper surface of the lower-layer ceramic blank body to enable the water content of the upper surface of the lower-layer ceramic blank body except the conducting circuit to be 19% -25%;

e. continuously applying the ceramic slurry prepared in the step one in a mould, and flattening the ceramic slurry to completely cover the conductive circuit;

f. placing the mould in an environment with the temperature range of 30-40 ℃ and the humidity range of 40-60% rh for slow drying until the ceramic slurry in the mould is dried to the water content of 25-35%, so that the ceramic slurry injected in the substep e forms an upper ceramic blank on the conducting circuit;

then, uniformly applying pressure on the upper layer ceramic blank body to enable the upper layer ceramic blank body and the lower layer ceramic blank body to be tightly pressed to form a ceramic blank body to be fired;

continuously drying the ceramic blank to be fired until the water content is 3% -7%;

g. demoulding the ceramic blank to be fired from the mould;

and step three, calcining the ceramic blank to be fired to form the graphene heating ceramic plate.

2. The preparation process of the graphene heating ceramic plate according to claim 1, wherein the preparation process comprises the following steps: in the sub-step d, after the water is supplied to the upper surface of the lower ceramic green body, a ceramic adhesive is applied to the region of the upper surface of the lower ceramic green body except for the conductive circuit.

3. The preparation process of the graphene heating ceramic plate according to claim 1 or 2, characterized in that: in the substep a, after the ceramic slurry is applied to the mold, the mold is sent to a vacuum defoaming machine to eliminate bubbles in the ceramic slurry applied in the substep a.

4. The preparation process of the graphene heating ceramic plate according to claim 3, wherein the preparation process comprises the following steps: in the sub-step e, after the ceramic slurry is applied to the mold, the mold is sent to a vacuum defoaming machine to remove the bubbles in the ceramic slurry applied in the sub-step e.

5. The utility model provides a graphite alkene ceramic plate that generates heat which characterized in that: the graphene heating ceramic plate is prepared by the preparation process of the graphene heating ceramic plate according to claim 4.

Technical Field

The invention relates to the technical field of electric heating ceramic plates, in particular to a graphene heating ceramic plate preparation process and a graphene heating ceramic plate.

Background

The graphene has excellent electric conductivity, heat conductivity and other properties, and has wide application prospects. The graphene heating plate is an electric heating plate prepared by utilizing the principle that graphene generates heat after being electrified, the existing graphene heating plate structure is applied in 2020, 06, 02 and the graphene heating plate disclosed in Chinese patent application publication No. CN111586906A comprises an external plate layer, a heat conduction connecting layer, a graphene heating layer, a heat insulation layer, a waterproof layer and a conductive frame. The graphene heating plate with the composite plate structure adopts a multi-layer composite structure, and the preparation process is simple.

However, when the utility model is used actually, because the outside board layer, the heat conduction articulamentum, graphite alkene generates heat the layer, the insulating layer, the heat conductivility and the coefficient of thermal expansion of waterproof layer are different, long-term back of using, outside board layer, the heat conduction articulamentum, graphite alkene generates heat the layer, insulating layer and waterproof layer material itself can be ageing, and the viscose of connecting outside board layer, the heat conduction articulamentum, graphite alkene generates heat the layer, insulating layer and waterproof layer also can be ageing, can cause to glue between each layer, influence graphite alkene and generate heat the life of board.

Disclosure of Invention

Therefore, aiming at the problems, the invention provides a preparation process of a graphene heating ceramic plate and the graphene heating ceramic plate.

In order to achieve the purpose, the invention adopts the following technical scheme: a preparation process of a graphene heating ceramic plate comprises the following steps:

step one, preparing ceramic slurry, wherein the water content of the ceramic slurry is 40-55%;

step two, comprising the following substeps:

a. slowly applying the ceramic slurry prepared in the step one into a mould to prevent large bubbles from being generated in the ceramic slurry, and flattening the ceramic slurry;

the depth of the ceramic slurry is 1/4-3/4 of the depth of the mould;

b. placing the mold in an environment with the temperature range of 30-40 ℃ and the humidity range of 40-60% rh for slow drying until the ceramic slurry in the mold is dried until the water content is 3-7% to form a lower-layer ceramic blank;

c. printing graphene conductive ink on the upper surface of the lower ceramic blank to form a continuous conductive circuit, and coating waterproof oil on the conductive circuit;

two electrode plates are further arranged on the edge of the upper surface of the lower ceramic blank body, and the two electrode plates are respectively connected to two ends of the conducting circuit in a conducting manner;

d. supplementing water to the upper surface of the lower-layer ceramic blank body to enable the water content of the upper surface of the lower-layer ceramic blank body except the conducting circuit to be 19% -25%;

e. continuously applying the ceramic slurry prepared in the step one in a mould, and flattening the ceramic slurry to completely cover the conductive circuit;

f. placing the mould in an environment with the temperature range of 30-40 ℃ and the humidity range of 40-60% rh for slow drying until the ceramic slurry in the mould is dried to the water content of 25-35%, so that the ceramic slurry injected in the substep e forms an upper ceramic blank on the conducting circuit;

then, uniformly applying pressure on the upper layer ceramic blank body to enable the upper layer ceramic blank body and the lower layer ceramic blank body to be tightly pressed to form a ceramic blank body to be fired;

continuously drying the ceramic blank to be fired until the water content is 3% -7%;

g. demoulding the ceramic blank to be fired from the mould;

and step three, calcining the ceramic blank to be fired to form the graphene heating ceramic plate.

Further, in the sub-step d, after the water is supplied to the upper surface of the lower ceramic green body, a ceramic adhesive is applied to a region of the upper surface of the lower ceramic green body except for the conductive circuit.

Further, in the sub-step a, after the ceramic slurry is applied to the mold, the mold is sent to a vacuum defoaming machine to eliminate bubbles in the ceramic slurry applied in the sub-step a.

Further, in the above substep e, after the ceramic slurry is applied to the mold, the mold is sent to a vacuum defoaming machine to remove bubbles in the ceramic slurry applied in substep e.

A graphene heating ceramic plate comprises the graphene heating ceramic plate prepared by the graphene heating ceramic plate preparation process.

By adopting the technical scheme, the invention has the beneficial effects that: graphite alkene heating ceramic plate integrated into one piece that makes through this graphite alkene heating ceramic plate preparation technology is provided with the conducting wire printed by graphite alkene conductive ink in the graphite alkene heating ceramic plate and is used for being connected to the outside electrode slice of graphite alkene heating ceramic plate, and after the electrode slice circular telegram, the conducting wire in the graphite alkene heating ceramic plate generates heat. Because graphite alkene heating ceramic plate integrated into one piece, graphite alkene heating ceramic plate heat conduction is more even to graphite alkene heating ceramic plate uses for a long time also can not take place the fracture, this graphite alkene heating ceramic plate's long service life.

Specifically, the preparation process of the graphene heating ceramic plate comprises the steps of firstly applying ceramic slurry in a mold, and slowly drying the ceramic slurry in the environment with the temperature range of 30-40 ℃ and the humidity range of 40-60% rh until the ceramic slurry in the mold is dried until the water content is 3-7%, wherein the formed lower-layer ceramic blank is dried uniformly and is not easy to crack. After a conducting circuit and an electrode plate are arranged on a dried lower-layer ceramic blank, water is replenished to the lower-layer ceramic blank again, ceramic slurry is applied to the lower-layer ceramic blank after a ceramic adhesive is applied to form an upper-layer ceramic blank, so that the lower-layer ceramic blank and the upper-layer ceramic blank formed by the ceramic slurry applied later can be tightly combined to form a ceramic blank to be fired, the upper-layer ceramic blank and the lower-layer ceramic blank are integrated after the ceramic blank to be fired is calcined, and the graphene heating ceramic plate can not crack even after being used for a long time.

Drawings

Fig. 1 is a schematic structural view of a graphene exothermic ceramic plate according to the present invention.

Detailed Description

The invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1, the present embodiment provides a graphene heating ceramic plate preparation process, including the following steps:

step one, preparing ceramic slurry, wherein the water content of the ceramic slurry is 40-55%. The ceramic slurry is prepared by weighing raw materials mainly comprising aluminum oxide, calcium oxide, magnesium oxide, silicon dioxide, rare metal oxide and the like according to a certain proportion, mixing the raw materials with water and an organic solvent after ball milling to form the ceramic slurry, and adopting the prior art as the process steps. The invention does not relate to the selection of the raw materials of the ceramic slurry and the improvement of the ball milling and mixing process.

The ceramic slurry with the water content of 40-55 percent is pasty and has fluidity; in this embodiment, the water content of the ceramic slurry is preferably 50%.

Step two, comprising the following substeps:

a. slowly applying the ceramic slurry prepared in the step one into a mould to prevent large bubbles from being generated in the ceramic slurry; then sending the mould into a vacuum defoaming machine to eliminate bubbles in the ceramic slurry; and finally, flattening the ceramic slurry, wherein the depth of the ceramic slurry is 1/4-3/4 of the depth of the mould.

The depth of the ceramic slurry at this point in this particular embodiment is 1/2 the depth of the mold.

b. And (3) slowly drying the die in an environment with the temperature range of 30-40 ℃ and the humidity range of 40-60% rh until the ceramic slurry in the die is dried until the water content is 3-7%, and forming a lower-layer ceramic blank. The lower-layer ceramic blank formed by the step is dried uniformly and is not easy to crack.

c. Printing graphene conductive ink on the upper surface of the lower ceramic blank to form a continuous conductive circuit, and coating waterproof oil on the conductive circuit;

two electrode plates are further arranged on the edge of the upper surface of the lower ceramic blank body and are respectively in conductive connection with two ends of the conductive circuit.

d. And (3) supplementing water to the upper surface of the lower-layer ceramic blank to enable the water content of the region of the upper surface of the lower-layer ceramic blank except the conducting circuit to be 19% -25%, and applying a ceramic adhesive to the region of the upper surface of the lower-layer ceramic blank except the conducting circuit. When the water content of the upper surface of the lower ceramic blank is 19-25%, the plasticity is good, and the upper ceramic blank is easy to bond.

e. Continuing to apply the ceramic slurry prepared in the first step in the mould; then sending the mould into a vacuum defoaming machine to eliminate bubbles in the ceramic slurry; and finally, flattening the ceramic slurry, wherein the ceramic slurry completely covers the conductive circuit.

f. The mould is placed in an environment with the temperature range of 30-40 ℃ and the humidity range of 40-60% rh for slow drying, and the upper ceramic blank formed by the step is dried uniformly and is not easy to crack. Until the ceramic slurry in the mould is dried until the water content is 25-35%, the ceramic slurry with the water content of 25-35% has good plasticity, so that the ceramic slurry injected in the substep e forms an upper ceramic blank on the conducting circuit;

then, uniformly applying pressure on the upper layer ceramic blank body to enable the upper layer ceramic blank body and the lower layer ceramic blank body to be tightly pressed to form a ceramic blank body to be fired;

continuously drying the ceramic blank to be fired until the water content is 3% -7%;

g. demoulding the ceramic blank to be fired from the mould;

and step three, calcining the ceramic blank to be fired to form the graphene heating ceramic plate.

As shown in fig. 1, a conductive circuit 2 printed by graphene conductive ink and an electrode sheet 3 for connecting to the outside 1 of the graphene heating ceramic plate are disposed in the graphene heating ceramic plate 1 prepared by the above graphene heating ceramic plate.

After the electrode plate 3 is electrified, the conductive circuit 2 in the graphene heating ceramic plate 1 generates heat. Because graphite alkene heating ceramic plate 1 integrated into one piece, 1 heat conduction of graphite alkene heating ceramic plate is more even to graphite alkene heating ceramic plate 1 also can not take place the fracture for a long time use. The graphene heating ceramic plate prepared by the graphene heating ceramic plate has long service life.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.