KR20170061346A - Ceramic vessel for induction ranges and method of manufacturing thereof - Google Patents

Ceramic vessel for induction ranges and method of manufacturing thereof Download PDF

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Publication number
KR20170061346A
KR20170061346A KR1020150166258A KR20150166258A KR20170061346A KR 20170061346 A KR20170061346 A KR 20170061346A KR 1020150166258 A KR1020150166258 A KR 1020150166258A KR 20150166258 A KR20150166258 A KR 20150166258A KR 20170061346 A KR20170061346 A KR 20170061346A
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KR
South Korea
Prior art keywords
container
weight
ceramic
induction
glaze
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KR1020150166258A
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Korean (ko)
Inventor
심재경
Original Assignee
주식회사 카멜
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Priority to KR1020150166258A priority Critical patent/KR20170061346A/en
Publication of KR20170061346A publication Critical patent/KR20170061346A/en

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • A47J36/027—Cooking- or baking-vessels specially adapted for use in microwave ovens; Accessories therefor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • A47J36/04—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay the materials being non-metallic
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/653—Processes involving a melting step
    • C04B35/657—Processes involving a melting step for manufacturing refractories
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Food Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Cookers (AREA)

Abstract

More particularly, the present invention relates to a ceramic container for induction cooking, and more particularly to a ceramic container for induction cooking, which is capable of reducing the water absorption rate of the ceramic material to 0.2% or less, The present invention relates to a ceramic container for induction porcelain which is excellent in durability by preventing cracking of a glaze layer even at a high temperature, and a manufacturing method thereof.
The present invention relates to a container body formed of a heat-resistant ceramic and formed in a container shape; A glaze layer formed on the outer surface of the container body; And a coating layer coated on the lower surface of the glaze layer, wherein the coating material containing the induction heating metal powder is applied.

Description

Technical Field [0001] The present invention relates to a ceramic container for induction range cooking,

More particularly, the present invention relates to a ceramic container for induction cooking, and more particularly to a ceramic container for induction cooking, which is capable of reducing the water absorption rate of the ceramic material to 0.2% or less, The present invention relates to a ceramic container for induction porcelain which is excellent in durability by preventing cracking of a glaze layer even at a high temperature, and a manufacturing method thereof.

Generally, an induction range used as a kitchen heater refers to a cooker of an induction heater, and an IH system refers to an electromagnetic induction cooker.

In such an induction range, when a high voltage is applied to a coil under the top plate, a magnetic field is induced around the coil, and the metal body included in the material of the container is heated when the magnetic field passes through the bottom of the cooking vessel will be.

Induction range heating induces heating that only the contents of the upper part of the metal body are heated without heating the upper surface of the cooktop because only the metal body is heated. Therefore, when the container is lifted out of the influence of the magnetic field of the induction cooking stove, the heating of the cooking container is immediately stopped, and energy is generated because the energy is generated only in the portion where the container touches.

In addition, since the induction range does not generate a flame, there is no risk of fire, and since it does not burn fuel such as gas, combustion gas including carbon monoxide is not generated, and not only harmless to human body but also maintain indoor In particular, since the induction range is sensitive to the metal body only, the container is heated, so that it can be used safely because it does not get burned when the user touches the top plate.

In addition to the above advantages, the induction heater has a thermal efficiency as high as 40% as compared with a hot plate heated by a heating wire, so that it can be rapidly heated with a low power consumption in a short time and is light in weight and portable In the case of wood, water, ceramics and other materials, magnetic lines are hardly blocked. Therefore, an induction heater is installed under the table, and a product called underlinger, which is cooked on a table using a magnetic line passing through a table board made of wood .

In order to cook food using the above-described induction cooking stove, it is necessary to contain iron (Fe) component in the cooking vessel itself so as to be induction-heated by a magnetic field generated in the induction cooking range. Therefore, Glass, and ceramics, that is, ceramics-made cooking vessels.

In order to solve this problem, attempts have been made to use a ceramic container (pot) as a conventional container in an induction cooking stove, but a ceramic container such as a pot is vulnerable to thermal shock. In particular, There is a problem that it can not be used for a long time because it is peeled from the container.

Patent Document 1: Korean Patent No. 10-1047355 Patent Document 2: Korean Patent No. 10-0976210 Patent Document 3: Korean Patent No. 10-1304445

Patent Document 1 discloses a technology for an environmentally-friendly induction range ceramics which can be formed into a thin thickness and exhibits sufficient strength and heat resistance to shorten the cooking time and a method for manufacturing the same.

However, in the case of the ceramics for environmentally friendly induction range of Patent Document 1, since the water absorption rate is 2 to 5%, there is a problem that the coating layer under the container is easily separated and durability is deteriorated when used for a long time.

On the other hand, in Patent Document 2, since the main body is made up of petalite as the main material and a cordierite chamotte having a coefficient of expansion lower than that of petalite next to it, the apparent porosity of the heat-resistant container is set to 10% to 15% (Cooking water), Na ions, and the like absorbed by the container body are easily released to prevent the occurrence of cracking or peeling, and the oxidation of the thin film layer, which is a heating element formed on the bottom surface of the heat- And a method for manufacturing a heat-resistant container for a heat-resistant container and an induction heater are disclosed.

However, although the heat-resistant container for the induction heater of Patent Document 2 can absorb and release water, there is a problem that the silver thin film layer (coating film layer) is easily separated due to repeated water absorption and release, resulting in poor durability.

On the other hand, Patent Document 3 discloses a method of manufacturing a low thermal expansion non-cracking / non-absorbing heat resistant magnet using a low thermal expansion natural mineral raw material refined at a high purity, attaching the induction inducer to the surface of a ceramics by transfer or hand painting, Discloses a technology relating to a direct-current heat resistant magnet for both induction cooking ranges and induction heating appliances.

However, since the moisture absorption rate of the induction-combined direct-current heat-resistant magnet of Patent Document 3 is about 5%, as in the above-mentioned documents, there is a problem that the coating layer is easily separated during long-term use, resulting in poor durability.

The object of the present invention is to reduce the water absorption rate of the ceramic material to 0.2% or less and to prevent the glaze layer and the coating layer And particularly to provide a ceramic container for induction cooking which is excellent in durability by preventing cracking of the glaze layer even at a high temperature, and a manufacturing method thereof.

According to an aspect of the present invention, there is provided a container comprising: a container body formed of a heat-resistant ceramic and formed in a container shape; A glaze layer formed on the outer surface of the container body; And a coating layer coated on the lower surface of the glaze layer, wherein the coating material containing the induction heating metal powder is applied.

In one embodiment, the heat-resistant ceramic comprises at least one of kaolin 37-41 wt%, spodumene 27-33 wt%, talc 7-9 wt%, clay 12-14 wt%, feldspar 7-9 wt%, zircon 1- 3% by weight.

In one embodiment, the glaze layer comprises at least one of spodumene 53-56 wt%, kaolin 8-10 wt%, feldspar 14-16 wt%, zirconium 11-14 wt%, talc 4-6 wt%, zinc oxide 1 -4 wt%, and barium carbonate 0.3-1.0 wt%.

In one embodiment, the coating layer is comprised of 70-85% by weight of silver powder and 15-25% by weight of flux.

According to another aspect of the present invention, there is provided a method of manufacturing a heat resistant ceramic material, (S20) of baking the vessel at 850 캜 to 950 캜; A step (S30) of applying a glaze to the outer surface of the container after cooling the ungulked container; Drying the coated glaze and then roasting the glaze at 1200 ° C to 1300 ° C (S40); (S50) of applying a coating material to the surface of the jacquard container and applying a coating material to the lower surface of the container; And a step (S60) of forming a coating layer by over-baking a container coated with the coating material.

In one embodiment, the heat-resistant ceramic comprises at least one of kaolin 37-41 wt%, spodumene 27-33 wt%, talc 7-9 wt%, clay 12-14 wt%, feldspar 7-9 wt%, zircon 1- 3% by weight.

In one embodiment, the glaze layer comprises at least one of spodumene 53-56 wt%, kaolin 8-10 wt%, feldspar 14-16 wt%, zirconium 11-14 wt%, talc 4-6 wt%, zinc oxide 1 -4 wt%, and barium carbonate 0.3-1.0 wt%.

In one embodiment, the coating layer is comprised of 70-85% by weight of silver powder and 15-25% by weight of flux.

INDUSTRIAL APPLICABILITY According to the ceramic container for induction cooking of the present invention and the method of manufacturing the ceramic container for induction cooking, firstly, the ceramic container of the present invention has excellent durability even by a high temperature and has no cracks and excellent heat transfer.

Second, since the composition ratio of the glaze layer and the coating layer is made the same, the generation of cracks in the glaze layer due to the high temperature is minimized. In particular, since the glaze layer and the coating layer are not separated from each other, durability is increased, So that the life of the battery can be prolonged.

Third, since the ceramic container of the present invention can be used in various fields such as an electric pressure cooker for IH, various industrial fields (electronic and chemical fields), medical and food fields, the ceramic container is increased in usability.

1 is a cross-sectional view schematically showing a ceramic container for a induction cooking stove according to the present invention.
2 is a flow chart showing a process sequence of a method of manufacturing a ceramic container for an induction cooking stove according to the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Further, detailed descriptions of well-known functions and configurations that may be unnecessarily obscured by the gist of the present invention are omitted.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a ceramic container for induction cooking according to the present invention and a method of manufacturing the same will be described with reference to the preferred embodiments of the present invention with reference to the accompanying drawings.

1 is a cross-sectional view schematically showing a ceramic container for a induction cooking stove according to the present invention.

Referring to FIG. 1, the ceramic container for induction cooking according to the present invention includes a container body 10 formed of a heat-resistant ceramic and formed in the form of a container. Preferably, the heat-resistant ceramic constituting the container body 10 is made of a material that does not cause cracking even in a hot heat. Specifically, the heat-resistant ceramic comprises 37-41 wt% of kaolin, 27-33 wt% of spodumene, 7-9 wt% of talc, 12-14 wt% of clay, 7-9 wt% of feldspar, and 1-3 wt% of zircon . The ideal heat-resistant ceramic composition ratio should be such that the ceramic raw material is pulverized at a ratio of 39 wt% of kaolin, 30 wt% of spodumene, 8 wt% of talc, 13 wt% of clay, 8 wt% of feldspar and 2 wt% of zircon, It is excellent and durability is excellent even in high temperature, and cracks are not generated. Each of the above compositions is formed through a powder process and a dry and wet process so as to be formed into particles having a size of about 45 탆.

On the other hand, the glaze layer 20 is composed of 53-56 wt% of spodumene, 8-10 wt% of kaolin, 14-16 wt% of feldspar, 11-14 wt% of silica, 4-6 wt% of talc, 4 wt%, and barium carbonate 0.3-1.0 wt%. The most ideal composition of the glaze is glaze mixed with 54.5 wt% of spodumene, 9.5 wt% of kaolin, 15 wt% of feldspar, 12.5 wt% of silica, 5.5 wt% of talc, 2.5 wt% of zinc oxide and 0.5 wt% of barium carbonate Cracking will not be caused even by heat shock. In addition, it is necessary to contain the above-mentioned silicate to reduce the expansion coefficient due to the stability, so as to smooth the surface of the oil together with the luster. As a result, microcracks are not generated and the food waste is not discharged. In addition, since the surface of the container must maintain the non-cracking due to the luster and thermal shock, the most ideal compounding ratio is blended as described above.

On the other hand, the coating layer 30 is composed of 70-85% by weight of silver powder and 15-25% by weight of flux. In the case of heating the ceramic container through the induction cooking range, the coating layer spreads the heat transfer evenly throughout the ceramic container by induction heating of the induction range, so that the contents inside the container body can be cooked more quickly and efficiently . In order to optimally distribute the heat uniformly, heat transfer is most efficiently performed when 80% by weight of silver powder and 20% by weight of flux are mixed.

The mixing of the above-mentioned combination of kaolin and zircon in the above-mentioned composition ratio is intended to make the water absorption rate of the food and detergent, that is, the food and detergent penetrating into the container body during the cooking and cleaning of the container to be within 0.2% Is 5 ~ 6%, because the detergent is absorbed during washing.

The glaze layer 20 and the coating layer 30 are blended in the same composition ratio as described above so as to maintain the same thermal expansion. Since the glaze layer and the coating layer are not separated from each other, It will be improved.

Hereinafter, a method of manufacturing a ceramic container for induction cooking according to the present invention will be described.

2 is a flow chart showing a process sequence of a method of manufacturing a ceramic container for an induction cooking stove according to the present invention. First, prior to the description, the composition ratio of the heat-resistant ceramic, glaze, and coating material to be described later is the same as that of the above-described ceramic container for induction cooking, and thus a detailed description thereof will be omitted.

Referring to FIG. 2, in the method of manufacturing a ceramic container for a induction cooking stove according to the present invention, a heat-resistant ceramic material is first crushed to form a container shape (S10).

Thereafter, the container is subjected to pre-baking (S20) at 850 ° C to 950 ° C (preferably about 900 ° C).

Thereafter, the container having the ungulked finish is cooled, and then the glaze is applied to the outer surface (S30).

Thereafter, the coated glaze is dried and then roasted (S40) at 1200 ° C to 1300 ° C (preferably around 1250 ° C). The above-mentioned chrysanthemum roasting temperature can be 100% magnetized only at about 1250 ° C.

Thereafter, a coating material is coated on the surface of the jar-filled container, and a coating material is coated on the lower surface of the container (S50).

Finally, the container coated with the coating material is over-baked to form a coating layer (S60). The coating layer generates an induction magnetic field to rapidly induce the heating of the contents, and therefore the food is cooked quickly. The coating layer may be formed by applying a coating material and baking it, but it may also be formed using a transfer sheet coated with a coating material for simplification of the working process and convenience.

The above-described method of manufacturing a ceramic container for a induction cooking stove of the present invention has been described with reference to a induction cooking stove. However, since it has excellent durability, it can be used in various fields such as electric pressure cooker for IH, various industrial fields .

The embodiments of the ceramic container for induction cooking according to the present invention and the method of manufacturing the ceramic container of the present invention described above are merely illustrative and those skilled in the art can make various modifications and equivalent embodiments You can see that it is possible. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

10: container body 20: glaze layer
30: Coating layer

Claims (8)

A container body formed of a heat-resistant ceramic and formed in a container shape;
A glaze layer formed on the outer surface of the container body; And
And a coating layer coated on the lower surface of the glaze layer and coated with a coating material containing the induction heating metal powder. The method according to claim 1,
The heat-
Characterized in that it consists of 37-41 wt% of kaolin, 27-33 wt% of spodumene, 7-9 wt% of talc, 12-14 wt% of clay, 7-9 wt% of feldspar, and 1-3 wt% Ceramic container for stove. The method according to claim 1,
The glaze layer
From 10 to 14% by weight of feldspars, from 4 to 6% by weight of talc, from 1 to 4% by weight of zinc oxide, from 0.3 to 1.0% by weight of barium carbonate %. ≪ / RTI > The method according to claim 1,
The coating film layer
By weight of silver powder, and from 15 to 25% by weight of flux. Milling the heat-resistant ceramic material to form a container (S10);
(S20) of baking the vessel at 850 캜 to 950 캜;
A step (S30) of applying a glaze to the outer surface of the container after cooling the ungulked container;
Drying the coated glaze and then roasting the glaze at 1200 ° C to 1300 ° C (S40);
(S50) of applying a coating material to the surface of the jacquard container and applying a coating material to the lower surface of the container; And
(S60) of forming a coating layer by over-baking a container coated with the coating material. 6. The method of claim 5,
The heat-
Characterized in that it consists of 37-41 wt% of kaolin, 27-33 wt% of spodumene, 7-9 wt% of talc, 12-14 wt% of clay, 7-9 wt% of feldspar, and 1-3 wt% A method of manufacturing a ceramic container for a stove. 6. The method of claim 5,
The glaze layer
From 10 to 14% by weight of feldspars, from 4 to 6% by weight of talc, from 1 to 4% by weight of zinc oxide, from 0.3 to 1.0% by weight of barium carbonate % ≪ / RTI > by weight. 6. The method of claim 5,
The coating film layer
By weight of silver powder, and from 15 to 25% by weight of flux.
KR1020150166258A 2015-11-26 2015-11-26 Ceramic vessel for induction ranges and method of manufacturing thereof KR20170061346A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220057670A (en) * 2020-10-29 2022-05-09 (주)에릭스 Ceramic ware for Non-stick and heat-resistant frying pan and preparation method thereof
KR20230135746A (en) 2022-03-17 2023-09-26 박세진 Heat resistant ceramic ware for induction range

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220057670A (en) * 2020-10-29 2022-05-09 (주)에릭스 Ceramic ware for Non-stick and heat-resistant frying pan and preparation method thereof
KR20230135746A (en) 2022-03-17 2023-09-26 박세진 Heat resistant ceramic ware for induction range

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