KR102113063B1 - Induction Pottery and the manufacturing method thereof - Google Patents

Abstract

The present invention improves the adhesion to the ceramic container by dispersing Fe nano-powder onto the Fe-based mesh and reduces the manufacturing cost, while improving the heating efficiency while inducing the heating element for the induction ceramic container. It aims to provide a method.
One embodiment of the present invention for achieving the above object, a ceramic container; And an induction heating element configured to be inserted into a wall constituting the ceramic container, wherein the induction heating member provides an induction ceramic container in which Fe-based nano powder is dispersed in a Fe-based mesh. .

Description

Induction Pottery and the manufacturing method thereof

The present invention relates to an induction induction heating body and an induction induction heating container, and more specifically, by dispersing Fe nano-powder on an Fe-based mesh to improve adhesion to a ceramic container, and to reduce manufacturing costs while generating heat. It relates to an induction heating element for an induction ceramic container with improved efficiency, an induction ceramic container, and a method for manufacturing the same.

Induction range, which has been used as a kitchen heater in recent years, is a heating body using the principle that when a high voltage is applied to a coil, a magnetic field is induced around the coil to heat a metal body within the influence of the magnetic field.

Since the above-described induction stove does not generate a flame, there is no risk of fire, and since fuel such as gas is not burned, there is no generation of combustion gas containing carbon monoxide, and it is not only harmless to the human body, but also consumes indoor oxygen to maintain a comfortable room. In particular, the induction stove is a kitchen heater that can be used very safely since it does not burn even if it touches the metal body and does not burn even if it touches the grill of the induction stove while heating the container.

However, as the magnetic field of the induction stove having the above-described characteristics does not respond to the human body, even in the case of the ceramic vessel made of ceramic, energy is not induced and is not heated, so it is impossible to use the ceramic vessel in the induction stove.

Accordingly, Korean Patent Registration No. 10-0450059 uses a transfer film having a sensitizer composed of silver and ferrous metal powders to transfer the sensitizer layer on the bottom surface of the cooking vessel to be used in an induction stove. Disclosed is a ceramic cooking vessel for an induction stove, and Korean Patent Publication No. 2000-0061679 discloses a ceramic cooking vessel in which a metal layer is formed by sputtering on the entire outer peripheral surface of a ceramic container.

However, in the case of forming the metal layer as an induction heating element on the outer peripheral surface of the ceramic cooking vessel as in the above-mentioned prior art, it may damage the aesthetics of the ceramic cooking vessel, and furthermore, it is difficult to contaminate and wash iron due to oxidation corrosion. Have

In addition, in the case of forming a metal layer as an induction heating body by an expensive metal transfer method, there is a problem in that manufacturing cost increases.

Republic of Korea Registered Patent No. 10-0450059 Republic of Korea Patent Publication No. 2000-0061679

Therefore, an embodiment of the present invention for solving the above-described problems of the prior art, by dispersing Fe nano-powder on the Fe-based mesh (mesh) to improve the adhesion to the ceramic container, while reducing the manufacturing cost while heating efficiency It is an object of the present invention to provide an induction heating body for an induction ceramic container, an induction ceramic container, and a method for manufacturing the same, which improves and minimizes contamination by iron components contained in the induction heating body.

An embodiment of the present invention for achieving the above object of the present invention, a ceramic container; And an induction heating element configured to be inserted into a wall constituting the ceramic container, wherein the induction heating member provides an induction ceramic container in which Fe-based nano powder is dispersed in a Fe-based mesh. .

The Fe-based mesh is characterized in that it is made of a Fe-based metal wire having a thickness of 100 μm to 150 μm to have a porosity of 40% to 60%.

The Fe-based nanopowder is a mixture of 80 wt% to 90 wt% of Fe nanopowder of 250 nm to 300 nm, and 10 wt% to 20 wt of a mixture of one or more iron oxide nanopowders of FeO, Fe ₂ O ₃ or Fe ₃ O ₄ of 70 nm to 100 nm. Characterized in that the% is a mixed nano powder.

The induction heating body is formed integrally with the porcelain container inside the porcelain container by laminating one or more of the Fe-based mesh coated with Fe-based nano powder paste and then inserting it into the porcelain container and sintering it. It is characterized by.

The Fe nanopowder paste is characterized by being formed by mixing the Fe-based nanopowder with a PVP-based dispersant and an amine-based binder.

The induction heating body is characterized in that the Fe-based mesh coated with the Fe-based nanopowder paste having a thickness of 150 μm to 250 μm and a weight in the range of 2 g to 4 g is stacked in 4 to 8 layers.

Another embodiment of the present invention for achieving the above object of the present invention, the step of applying a Fe-based nano-powder paste to the Fe-based mesh; And inserting the Fe-based mesh coated with the Fe-based nano-powder into the ceramic container and then sintering to produce an induction ceramic container in which an induction heating body is integrated therein. Provides a container manufacturing method.

The Fe-based mesh is characterized by having a porosity of 40% to 60% with a Fe-based metal wire having a thickness of 100 μm to 150 μm.

The Fe-based nanopowder paste is characterized by being prepared by mixing a Fe-based nanopowder with a PVP-based dispersant and an amine-based binder.

The sintering in the step of manufacturing the induction ceramic container, after stacking one or more of the Fe-based mesh coated with the Fe-based nano-powder paste and inserting it into the ceramic container, for a heating time of 80 minutes to 100 minutes. It is characterized in that it is heated to a temperature of 800 ° C to 1,000 ° C and maintained for 1 hour to 2 hours.

In the step of manufacturing the induction ceramic container, the Fe-based mesh coated with the Fe-based nanopowder paste is produced to have a thickness of 150 μm to 250 μm and a weight in the range of 2 g to 4 g, and then 4 to 8 layers. It is characterized in that it is formed by lamination and inserted into the ceramic container.

According to embodiments of the present invention, by dispersing the Fe nano-powder on a Fe-based mesh and inserting it into a porcelain container and sintering it, the porcelain container is integrally formed with an induction heating body therein. It improves the adhesion of the induction heating element, prevents damage and corrosion of the induction heating element, reduces the manufacturing cost of the induction ceramic container, and improves heating efficiency while minimizing contamination by iron components contained in the induction heating element. It provides an effect.

1 is a photograph of an induction ceramic container 10 of an embodiment of the present invention.
2 is a cross-sectional view of the induction ceramic container 10 of FIG. 1.
Figure 3 is a photo of an Fe-based mesh 30 of one embodiment of the present invention is inserted into the ceramic container 20 to be an induction heating body 40 by sintering inside the induction ceramic container 10.
Figure 4 is a flow chart of a method for manufacturing an induction ceramic container of another embodiment of the present invention.
5 is a graph showing the induction heating performance according to the number of layers of the Fe-based mesh 40 to which the Fe-based nanopowder paste forming the induction heating body 40 is applied.
FIG. 6 is an SEM photograph including a graph of EDS measurement of Fe and Si at a coupling portion between the induction heating body 40 and the ceramic container 20 formed inside the ceramic container 20.
7 is a graph showing the results of EDS analysis for Fe by position at the coupling portion of the induction heating body 40 and the ceramic container 20 formed inside the ceramic container 20 of FIG. 6.
FIG. 8 is a graph showing the results of EDS analysis for Si for each position in the coupling portion of the induction heating body 40 and the ceramic container 20 formed inside the ceramic container 20 of FIG. 6.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be implemented in various different forms, and thus is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and like reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part is "connected (connected, contacted, coupled)" with another part, it is not only "directly connected" but also "indirectly connected" with another member in between. "It also includes the case where it is. Also, when a part “includes” a certain component, this means that other components may be further provided instead of excluding other components, unless otherwise stated.

The terms used herein are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “include” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and that one or more other features are present. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a photo of an induction ceramic container 10 of an embodiment of the present invention, FIG. 2 is a cross-sectional view of the induction ceramic container 10 of FIG. 1, and FIG. 3 is sintered inside the induction ceramic container 10. It is a picture of the Fe-based mesh 30 of one embodiment of the present invention is inserted into the ceramic container 20 to be an induction heating body 40.

1 to 3, the induction porcelain container 10 includes a porcelain container 20 composed of an upper porcelain container 21 and a lower porcelain container 23, and Fe-based nano in a Fe-based mesh. The powder is dispersedly formed and inserted between the upper porcelain container 21 and the lower porcelain container 23, and then comprises an induction heating body 40 integrally formed inside the porcelain container 20 by sintering. do.

As shown in FIG. 3, the Fe-based mesh 30 may be manufactured to have 150-250 mesh having a porosity of 40% to 60% with a Fe-based metal wire having a thickness of 100 μm to 150 μm. At this time, the Fe-based mesh 30 may be composed of a Fe-based porous body having a porosity of 40% to 60% with a Fe-based metal wire having a thickness of 100 μm to 150 μm.

The induction heating body 40 is stacked with one or more Fe-based meshes 30 coated with Fe-based nano-powder paste, and then inserted into the ceramic container 20 to sinter the ceramic container 20. ) Is formed integrally with the ceramic container 20.

The Fe-based nano powder paste is formed by mixing a Fe-based nano powder with a PVP-based dispersant and an amine-based binder. At this time, the Fe-based nano powder is 250nm to 300nm of Fe nano powder 80wt% to 90wt%, and 70nm to 100nm of FeO, Fe ₂ O ₃ or Fe ₃ O ₄ at least one mixture of iron oxide nano powder 10wt% to It is prepared by mixing 20wt%.

The Fe-based mesh 30 coated with the Fe nano-powder paste of the above-described configuration and the ceramic container 20 are included in the Fe-based mesh 30 coated with the Fe-based nano-powder paste during the sintering process described above. Fe is diffused into the ceramic container 20, and Si contained in the ceramic container 20 is diffused toward the Fe-based mesh 30 side. Thereby, the bonding force at the coupling portion between the ceramic container 20 and the induction heating body 40 is strengthened, and at the same time, the heat is uniformly generated by an electromagnetic field applied from the outside, thereby improving the heating efficiency.

4 is a flow chart of a method for manufacturing an induction ceramic container according to another embodiment of the present invention.

As shown in Figure 4, the method of manufacturing the induction ceramic container, Fe-based mesh production step (S10), Fe-based nano-powder preparation step (S20), Fe-based mesh 30 to apply the Fe-based nano powder paste It comprises a step (S30) and a step (S40) of manufacturing an induction ceramic container.

First, in the Fe-based mesh production step (S10), a Fe-based mesh 30 having a porosity of 40% to 60% is produced with a Fe-based metal wire having a thickness of 100 μm to 150 μm.

Next, in the Fe-based nano powder paste production step (S20), a Fe-based nano powder paste is prepared by mixing Fe-based nano powder with a PVP-based dispersant and an amine-based binder. At this time, the Fe-based nano-powder to be mixed is a mixture of 80 wt% to 90 wt% of Fe nano-powder having a size of 250 nm to 300 nm, and 10 wt% to a mixture of at least one iron oxide nanopowder of FeO, Fe ₂ O ₃ or Fe ₃ O ₄ having a size of 70 nm to 100 nm. It may be a mixture of 20wt%.

Then, by applying the Fe-based nano-powder paste to the Fe-based mesh 30 by performing a step (S30) of applying the Fe-based nano-powder paste, Fe-based nano-powder with a number required for heating The Fe-based mesh 30 to which the paste is applied is laminated. In the process, the Fe-based mesh 30 to which the Fe-based nano powder paste is applied may have an induction heating body having a thickness of 150 μm to 250 μm and a weight in the range of 2 g to 4 g.

Next, in the step (S40) of manufacturing the induction ceramic container, the stack of the Fe-based mesh 30 coated with the Fe-based nanopowder paste is formed of the upper ceramic container 21 and the lower ceramic container 23. After being inserted therebetween, the temperature was raised to a temperature of 800 ° C to 1,000 ° C for a heating time of 80 minutes to 100 minutes, maintained for 1 hour to 2 hours, and then sintered to cool. By the sintering, Fe contained in the Fe-based mesh 30 coated with the Fe-based nano powder paste diffuses into the ceramic container 20, and Si contained in the ceramic container 20 is Fe-based. It is diffused to the mesh 30 side, and the Fe mesh 30 and the ceramic container 20 are integrated to produce an induction ceramic container 10 by forming an induction heating body 40 inside the ceramic container 20. This is done.

<Experimental Example>

-Production of experimental induction ceramic container (10)

A Fe-based mesh 30 of 200 mesh having a porosity of 51% was produced with a Fe-based metal wire having a thickness of 100 μm to 150 μm.

Fe nano powders were prepared by mixing 80 wt% of Fe nano powders having a size of 250 nm to 300 nm and 20 wt% of a mixture of at least one iron oxide nano powder of FeO, Fe ₂ O ₃ or Fe ₃ O ₄ having a size of 70 nm to 100 nm.

A Fe-based nanopowder paste was prepared by mixing the prepared Fe nano-powder with a PVP-based dispersant and an amine-based binder.

The prepared Fe-based nano-powder paste was applied to the Fe-based mesh 30 to produce a Fe-based nano-powder paste having a thickness of 150 μm to 250 μm and a weight of 3 g.

After the Fe-based nano-powder paste is coated with the Fe-based mesh 30 in 1 to 8 layers, each is inserted into the upper ceramic container 21 and the lower ceramic container 23, and the heating time of 100 minutes During heating by heating to a temperature of 800 ° C. for 1 hour and cooling, the induction heating body 40 formed by laminating 1 to 8 layers of the Fe-based mesh 30 coated with the Fe-based nanopowder paste is inside. Eight induction ceramic containers 10 integrally formed were manufactured.

-analysis

For the eight induction ceramic containers 10 manufactured as described above, SEM imaging of the heating efficiency, the ceramic container 20 and the induction heating body 40 coupling portion, respectively, was performed, and the EDS for Fe and Si distribution ( Energy Dispersive X-ray Spectroscopy) analysis was performed.

5 is a graph showing the induction heating performance according to the number of layers of the Fe-based mesh 40 to which the Fe-based nanopowder paste forming the induction heating body 40 is applied.

As shown in FIG. 5, it was confirmed that the Fe-based mesh 40 coated with Fe-based nanopowder paste was effective induction heating from 4 layers or more, and heated to 250 ° C. for 7 layers or more. In addition, each layer has a thickness of 150 μm to 250 μm and is manufactured to have a weight of 3 g, and thus has little influence on the design and weight of the induction ceramic container 10.

FIG. 6 is an SEM photograph including an EDS measurement graph of Fe and Si at a coupling portion between the induction heating body 40 and the ceramic container 20 formed inside the ceramic container 20.

As shown in FIG. 6, it was confirmed that the coupling at the coupling portion of the induction heating body 40 and the ceramic container 20 inside the induction ceramic container 10 was made sound.

7 is a graph showing the results of the EDS analysis for Fe by position at the coupling portion of the induction heating body 40 and the ceramic container 20 formed inside the ceramic container 20 of FIG. 6, and FIG. It is a graph showing the results of the EDS analysis for Si by position at the coupling portion of the induction heating body 40 and the ceramic container 20 formed inside the ceramic container 20.

The horizontal positions in FIGS. 7 and 8 correspond to the vertical positions in FIG. 6.

7 and 8, the main component of the induction heating body 40 was Fe was also detected at the interface side of the ceramic container 20, and Si, the main component of the ceramic container 20, was also detected at the induction heating body 40. This indicates that the bonding was performed by diffusion, indicating that the induction heating body 40 and the ceramic container 20 form a healthy bond, and thus, it was confirmed that no heat crack occurred during use.

The above description of the present invention is for illustration only, and those skilled in the art to which the present invention pertains can understand that the present invention can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts should be interpreted to be included in the scope of the present invention.

10: Induction ceramic container
20: Pottery container
21: upper ceramic container
23: lower ceramic container
30: Fe-based mesh
40: induction heating element

Claims (11)

Ceramic containers; And
Including an induction heating body configured to be inserted into the wall constituting the ceramic container;
The induction heater is an induction ceramic container characterized in that the Fe-based nano-powder containing Fe is dispersed in a Fe-based mesh containing Fe. According to claim 1, The Fe-based mesh (mesh),
Induction ceramic vessel, characterized in that it is made to have a porosity of 40% to 60% of Fe-based metal wire containing Fe of 100㎛ to 150㎛ thickness. According to claim 1, The Fe-based nano powder,
The nano-powder is a mixture of 80wt% to 90wt% of Fe nanopowders of 250nm to 300nm and 10wt% to 20wt% of a mixture of at least one iron oxide nanopowder of FeO, Fe ₂ O ₃ or Fe ₃ O ₄ of 70nm to 100nm. Induction ceramic container, characterized in that. According to claim 1, The induction heating element,
It is characterized in that it is formed integrally with the ceramic container by laminating one or more of the Fe-based mesh coated with Fe-based nano-powder paste containing Fe and then sintering them by inserting into the ceramic container. Induction ceramic container. The method of claim 4, wherein the Fe-based nano powder paste,
Induction ceramic container, characterized in that formed by mixing the Fe-based nano-powder with a PVP-based dispersant and an amine-based binder. The method of claim 4, wherein the induction heating element,
Induction ceramic container, characterized in that the Fe-based mesh coated with the Fe-based nano powder paste having a thickness of 150 μm to 250 μm and a weight in the range of 2 g to 4 g is formed in 4 to 8 layers. Applying a Fe-based nano powder paste containing Fe to a Fe-based mesh containing Fe; And
And inserting the Fe-based mesh coated with the Fe-based nano-powder into the ceramic container and then sintering it to produce an induction ceramic container in which an induction heating body is integrated therein. Production method. The method of claim 7, wherein the Fe-based mesh,
A method of manufacturing an induction ceramic container, characterized by having a porosity of 40% to 60% with a Fe-based metal wire containing Fe having a thickness of 100 μm to 150 μm. The method of claim 7, wherein the Fe-based nano powder paste,
A method of manufacturing an induction ceramic container, characterized in that it is produced by mixing Fe-based nano powder containing Fe in a PVP-based dispersant and an amine-based binder. According to claim 7, The sintering of the step of manufacturing the induction ceramic container,
After stacking one or more of the Fe-based meshes coated with the Fe-based nanopowder paste and inserting them into the ceramic container, the temperature is raised to a temperature of 800 ° C to 1,000 ° C for a heating time of 80 minutes to 100 minutes, and then 1 hour. Method for producing an induction ceramic container, characterized in that is performed by maintaining for 2 hours. According to claim 7, In the step of manufacturing the induction ceramic container, the Fe-based mesh coated with the Fe-based nano-powder paste,
After manufacturing to have a thickness of 150㎛ to 250㎛ and a weight in the range of 2g to 4g, a method of manufacturing an induction ceramic container, characterized in that it is formed in a layer of 4 to 8 and inserted into the ceramic container.

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