CN113207204A - Novel electromagnetic induction heating ceramic pot and preparation process thereof - Google Patents

Novel electromagnetic induction heating ceramic pot and preparation process thereof Download PDF

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Publication number
CN113207204A
CN113207204A CN202110395118.9A CN202110395118A CN113207204A CN 113207204 A CN113207204 A CN 113207204A CN 202110395118 A CN202110395118 A CN 202110395118A CN 113207204 A CN113207204 A CN 113207204A
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layer
electromagnetic induction
heating
induction heating
ceramic pot
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CN113207204B (en
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郑华强
韦军宁
王兴军
杜佳颖
王双喜
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Shantou University
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Shantou University
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • 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
    • A47J27/00—Cooking-vessels
    • 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
    • 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
    • A47J36/24—Warming devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cookers (AREA)

Abstract

The invention relates to a novel electromagnetic induction heating ceramic pot and a preparation process thereof. The electromagnetic heating layer main body material consists of copper powder and low-melting-point nano glass powder; the cheap diamagnetic base metal copper powder coating is developed into a daily electromagnetic heating material, and compared with the electromagnetic induction heating ceramic pot with silver magnetic conductive sheets attached on the market, the problems that the pot body is easy to migrate, the heating efficiency is reduced, and the service life is shortened are solved, and the preparation cost is greatly reduced; copper powder with low chemical activity replaces materials such as nickel, iron and the like which are magnetic conductive and conductive but are easy to oxidize, so that the heating efficiency is greatly improved, and the high-temperature oxidation resistance of the heating layer in the repeated heating process is greatly improved, thereby prolonging the service life of the pot. The electromagnetic induction heating ceramic pot has the advantages of low preparation cost, high heating efficiency, long service life and the like, and has good industrialization prospect.

Description

Novel electromagnetic induction heating ceramic pot and preparation process thereof
Technical Field
The invention relates to the field of kitchen cookware, in particular to a novel electromagnetic induction heating ceramic pot and a preparation process thereof.
Background
The electromagnetic induction technology has the advantages of high heating efficiency, safety, environmental protection, accurate temperature control, non-contact heating and the like, and is widely applied to heating container industries such as an electromagnetic electric cooker, an electromagnetic water heater, an electromagnetic teapot and the like. However, for products such as traditional glass inner containers and ceramic inner containers, the application of the products in the electromagnetic induction technology is limited due to the performance defects of insulation, non-magnetic conductivity and the like. At present, a silver electromagnetic induction heating membrane is attached to non-magnetic cookware such as a ceramic pot in the market so as to achieve the purpose of electromagnetic induction heating of the ceramic pot. However, silver is easy to migrate under the high temperature condition of electromagnetic heating, so that the heating efficiency of the ceramic pot body attached with the silver electromagnetic induction heating sheet is reduced, the service life is shortened, in addition, the silver is expensive, the manufacturing cost of the silver electromagnetic induction heating film is high, and the silver electromagnetic induction heating film is difficult to popularize and apply.
Disclosure of Invention
The invention aims to provide a novel electromagnetic induction heating ceramic pot, which solves the problems of low heating efficiency, high manufacturing cost and the like of the existing ceramic pot body attached with a silver electromagnetic induction heating sheet.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a novel electromagnetic induction heating pottery pot, includes the electromagnetic heating layer, the electromagnetic heating layer includes the component of following part by mass:
53 to 70 percent of copper powder
10-20% of low-melting-point nano glass powder
20-27% of organic carrier
The induction cooker heats food by utilizing an electromagnetic induction principle, the surface of the induction cooker is a heat-resistant microcrystal panel, alternating current passes through a coil below the microcrystal panel to generate an alternating magnetic field, and magnetic lines of force in the magnetic field generate eddy current when passing through the bottoms of objects containing magnetic atoms, such as an iron pot, a stainless steel pot and the like, so that the pot bottom is heated quickly to achieve the purpose of heating food.
Theoretically, the precondition of electromagnetic induction heating is that the material must conduct electricity and magnetism simultaneously, and under the condition of the common frequency of the household induction cooker of 30-40kHz, iron, cobalt, nickel and related ferromagnetic alloy materials have higher magnetic conductivity, so that the material can induce the electronic eddy current in the changing magnetic field, and can perform rapid induction heating. The ceramic pot is neither conductive nor magnetic conductive, and can not be applied to electromagnetic induction heating. Although the copper pot is an excellent conductor, the copper pot belongs to a diamagnetic material, has weak magnetic field induction capability in a magnetic field, cannot generate large eddy current in the magnetic field frequency range of 30-40kHz of a household induction cooker, and cannot be generally applied to electromagnetic induction heating.
In recent years, a ceramic pot with a silver electromagnetic induction heating membrane attached to the ceramic pot to achieve electromagnetic induction heating has appeared, however, silver is prone to generate a migration phenomenon, and at an induction heating high temperature, the migration speed is accelerated, which will cause the attenuation of the heating efficiency of a silver heating layer, and finally the heating layer fails in less than half a year. And the price of silver is high, so that the electromagnetic heating ceramic pot attached with the silver heating membrane has higher preparation cost and is not beneficial to product application and popularization.
The inventor of the application mixes 53-70% of micro-nano copper powder, 10-20% of low-melting-point nano glass powder and 20-27% of organic carrier through a specific preparation process to prepare the coating of copper particles, and can generate a good heating phenomenon in a magnetic field, so that the ceramic pot coated with the copper particle coating has the heating efficiency which is comparable to that of a ceramic pot attached with a silver electromagnetic induction heating sheet. The novel electromagnetic induction heating ceramic pot with the transition layer and the protective layer, which is prepared by the invention, has no attenuation phenomenon of heating efficiency after more than half a year of repeated heating tests.
The low melting point nano glass powder, namely nano particle material with the particle size of less than 0.1 micron, which is used together can be melted after being heated. The organic vehicle used in combination can be selected from various vehicles as long as the slurry has a flowing viscosity, such as ethanol, varnish, etc.
Preferably, novel electromagnetic induction heating pottery pot still includes the pottery pot body, transition layer, protective layer, the electromagnetic heating layer passes through the transition layer with the bottom of the pottery pot body combines, the protective layer covers on the electromagnetic heating layer.
Preferably, the copper powder comprises the following components in parts by volume:
70-85% of micron copper powder
15-30% of nano copper powder
A large amount of pores exist after copper slurry with single micron particle size is sintered, and copper powder with micro/nano particle size is mixed, so that a sintered film layer is more compact, and the heating capacity of a pot is optimized.
Preferably, the particle size of the micron copper powder is 2-15 μm; the particle size of the nano copper powder is 30-100 nm.
Preferably, the low-melting-point nano glass powder is ZnO-Bi2O3-B2O3Ternary glass system glass powder; the thickness of the electromagnetic heating layer is 0.1-0.3 mm.
ZnO-Bi is adopted as the low-melting-point nano glass powder2O3-B2O3A ternary glass system. The bismuth-based low-melting-point glass powder has a lower softening point, is relatively stable in chemical property and is not easy to react with other components of the slurry; the glass powder with the nano-particle size can further reduce the sintering temperature of the electromagnetic heating layer.
Preferably, the transition layer is composed of B with high thermal conductivity2O3-ZnO-Na2The O-series glass powder is sintered, and the thermal expansion coefficient of the glass powder is between the electromagnetic heating layer and the pot body.
The high thermal conductivity of the glass powder can quickly and effectively transmit the heat generated by the electromagnetic heating layer to the pot body; the glass powder with moderate thermal expansion coefficient is used as the transition layer, so that the thermal stress between the electromagnetic heating layer and the pot body can be reduced, the thermal shock resistance of the electromagnetic heating layer is improved, and the service life is prolonged.
Preferably, the protective layer has a thermal expansion coefficient of 6-14 × 10-6The glass powder of the/K and the high-temperature resistant inorganic pigment are sintered; the thickness of the protective layer is 0.06-0.1 mm.
The protective layer has a thermal expansion coefficient of 6 to 14 x 10-6The glass powder is prepared by sintering the glass powder and the high-temperature resistant inorganic pigment. The compact and firm protective film can be formed on the surface of the electromagnetic heating layer to prevent the electromagnetic heating film from being oxidized at high temperature; the thermal expansion coefficient is 6-14 multiplied by 10-6the/K glass powder is used as a protective layer, so that the thermal stress of the protective layer and the electromagnetic heating layer can be effectively reduced.
Preferably, the method comprises the following steps:
(1) weighing the transition layer raw materials, uniformly mixing, coating the transition layer raw materials on the bottom surface of the ceramic pot body, drying and sintering to obtain the transition layer;
(2) weighing the copper powder, the low-melting-point nano glass powder and the organic carrier in proportion to prepare slurry, mixing and defoaming to obtain slurry with proper viscosity;
(3) coating the slurry with proper viscosity on the surface of the transition layer, and sintering under the protection of inert atmosphere to obtain the electromagnetic heating layer;
(4) weighing the raw materials of the protective layer, uniformly mixing, coating the raw materials on the electromagnetic heating layer, drying and sintering at a low temperature to obtain the protective layer;
(5) the pottery pot body the transition layer the electromagnetic heating layer the protective layer combines closely, can obtain novel electromagnetic induction heating pottery pot.
Preferably, the method comprises the following steps:
(1) weighing the transition layer raw materials, uniformly mixing, coating the transition layer raw materials on the bottom surface of the ceramic pot body, drying, and sintering at 850-950 ℃ to obtain the transition layer;
(2) weighing the copper powder, the low-melting-point nano glass powder and the organic carrier according to a ratio to prepare slurry, mixing for 30-60 min, and then defoaming in vacuum for 5-15 min to obtain slurry with proper viscosity;
(3) coating the slurry with proper viscosity on the surface of the transition layer, and carrying out heat preservation for 15-30 min at the temperature of 750-820 ℃ under the protection of inert atmosphere for sintering to obtain the electromagnetic heating layer;
(4) weighing the raw materials of the protective layer, uniformly mixing, coating the raw materials on the electromagnetic heating layer, drying, and sintering at a low temperature to obtain the protective layer;
(5) the pottery pot body the transition layer the electromagnetic heating layer the protective layer combines closely, can obtain novel electromagnetic induction heating pottery pot.
The drying temperature of the step (1) and the step (4) is about 100 ℃ generally, and the coating can be completely dried.
Preferably, the coating comprises one of screen printing and spraying.
Compared with the prior art, the implementation of the invention has the following beneficial effects:
the invention uses the base metal copper powder coating with diamagnetism and low price as the main material of the electromagnetic induction heating of the ceramic pot, obtains good heating effect, compared with the electromagnetic induction heating ceramic pot attached with the silver heating membrane on the market, solves the problems that the silver is easy to migrate under the high temperature condition of electromagnetic heating, so that the heating efficiency of the ceramic pot attached with the silver heating membrane is reduced, and the service life is shortened, and greatly reduces the cost; copper powder with high conductivity and low chemical activity replaces materials such as nickel, iron and the like which are magnetically conductive and conductive but are easy to oxidize, so that the heating efficiency of the ceramic pot with the coating and the oxidation resistance of heating metal in the repeated heating process are greatly improved, the gradual attenuation of the heating efficiency of the ceramic pot along with the increase of the use times is avoided, and the service life of the pot is prolonged; through the design of transition layer and protective layer, further improved the life of electromagnetic induction heating pottery pot. The electromagnetic induction heating ceramic pot has the advantages of low preparation cost, high heating efficiency, long service life and the like, and has extremely high application value and good industrialization prospect.
Drawings
FIG. 1 is a schematic structural view of an electromagnetic induction heating ceramic pot according to the present invention;
wherein, the pot body is 1-a ceramic pot body, 2-a transition layer, 3-an electromagnetic heating layer and 4-a protective layer;
fig. 2 is an EDS diagram of the distribution of elemental copper in an electromagnetic heating layer.
Detailed Description
In order to make the technical solution of the present invention easier to understand, the present invention will be further described in detail with reference to the accompanying drawings so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiment is not limited to the present invention. Modifications or substitutions to methods, procedures, or conditions of the invention may be made without departing from the spirit and scope of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.
Example 1
As shown in FIG. 1, 7.2g of B having high thermal conductivity was weighed2O3-ZnO-Na2Mixing O series glass powder and 2.8g ethanol solvent uniformly, spraying the mixture on the surface of the bottom of a ceramic pot body 1 with the diameter of 10cm, drying at 140 ℃, and sintering at 900 ℃ to obtain a transition layer 2. Then 4.8g of copper powder with a particle size of 8 μm, 1.2g of copper powder with a particle size of 60nm and 1.6g of low melting point ZnO-Bi are weighed2O3-B2O3Preparing slurry from nano glass powder and 2.4g of organic carrier, mixing the slurry for 45min, then carrying out vacuum defoamation for 10min, spraying the defoamed slurry on the surface of a transition layer, and carrying out heat preservation for 20min at 780 ℃ under the protection of inert atmosphere to sinter to obtain the electromagnetic heating layer 3. 6g of SiO with high thermal expansion coefficient are weighed2-Al2O3CaO series glass powder, 1.5g of high temperature resistant inorganic pigment and 2.5g of glass varnish solvent are evenly mixed and sprayed on the surface of an electromagnetic heating layer, and the mixture is dried at the temperature of 120 ℃ and baked at low temperatureAnd (4) obtaining the protective layer 4. Finally, the novel electromagnetic induction heating ceramic pot which takes copper as a main material and has higher electromagnetic heating efficiency is obtained.
Example 2
As shown in FIG. 1, 6.5g of B having high thermal conductivity was weighed2O3-ZnO-Na2Mixing O series glass powder and 3.5g ethanol solvent uniformly, spraying the mixture on the surface of the bottom of a ceramic pot body 1 with the diameter of 10cm, drying at 150 ℃, and sintering at 850 ℃ to obtain a transition layer 2. Weighing 4.51g copper powder with particle size of 2 μm, 0.79g copper powder with particle size of 30nm, and 2g low melting point ZnO-SiO2Preparing slurry from CaO nano glass powder and 2.7g of organic carrier, mixing the slurry for 30min, then defoaming the slurry in vacuum for 15min, spraying the defoamed slurry on the surface of a transition layer, and carrying out heat preservation for 30min at 820 ℃ under the protection of inert atmosphere to sinter to obtain the electromagnetic heating layer 3. Weighing 5g of SiO with high thermal expansion coefficient2-Al2O3CaO series glass powder, 2g of high temperature resistant inorganic pigment and 3g of glass varnish solvent are evenly mixed, sprayed on the surface of an electromagnetic heating layer, dried at the temperature of 120 ℃ and sintered at low temperature. Finally, the novel electromagnetic induction heating ceramic pot which takes copper as a main material and has higher electromagnetic heating efficiency is obtained.
Example 3
As shown in FIG. 1, 8g of B having high thermal conductivity was weighed2O3-ZnO-Na2Mixing O-series glass powder and 2g of ethanol solvent uniformly, screen-printing the mixture on the surface of the bottom of a ceramic pot body 1 with the diameter of 10cm, drying at 90 ℃, and sintering at 950 ℃ to obtain a transition layer 2. Weighing 4.9g copper powder with particle size of 15 μm, 2.1g copper powder with particle size of 100nm, and 1g low melting point Na2O-B2O3-SiO2Preparing slurry from nano glass powder and 2g of organic carrier, mixing the slurry for 60min, then carrying out vacuum defoamation for 5min, carrying out screen printing on the defoamed slurry with proper viscosity on the surface of a transition layer, and carrying out heat preservation for 15min at the temperature of 750 ℃ under the protection of inert atmosphere to sinter to obtain the electromagnetic heating layer 3. Weighing 7g of SiO with high thermal expansion coefficient2-Al2O3-CaO series glassGlass powder, 1g of high-temperature-resistant inorganic pigment and 2g of glass varnish solvent are uniformly mixed, screen-printed on the surface of an electromagnetic heating layer, dried at the temperature of 120 ℃ and sintered at low temperature. Finally, the novel electromagnetic induction heating ceramic pot which takes copper as a main material and has higher electromagnetic heating efficiency is obtained.
Example 4
And (3) experimental exploration of the electromagnetic induction heating ceramic pot consisting of the copper powder with the single-micron particle size.
Weighing the following raw materials of the electromagnetic heating layer slurry according to mass percentage: 6g of copper powder having a particle size of 8 μm and 1.6g of low-melting-point ZnO-Bi2O3-B2O3Nano glass powder and 2.4g of ethanol solvent are prepared into slurry. The rest of the formula and the preparation process are the same as those of the example 1.
Comparative example 1
And (3) experimental exploration of the electromagnetic induction heating ceramic pot made of different materials.
Weighing the following raw materials of the electromagnetic heating layer slurry according to mass percentage: 6g of Fe powder, 1.6g of low melting point ZnO-Bi2O3-B2O3Nano glass powder and 2.4g of ethanol solvent are prepared into slurry. The rest of the formula and the preparation process are the same as those of the example 1.
Comparative example 2
A silver magnetic conduction patch electromagnetic induction heating ceramic pot with the diameter of 10cm is purchased from the market.
Effect example 1
The performance tests and comparisons of the electromagnetic induction heating ceramic pots prepared in examples 1 to 4 and comparative examples 1 to 2 and the electromagnetic induction heating ceramic pots of silver magnetic conductive patches purchased from the market were performed, and the performance results after repeated heating for 100 times are shown in table 1. The bonding strength of the electromagnetic heating layer and the base material is tested by a QFH-HD600 adhesion tester, and the bonding strength is divided into six grades from small to large, namely 0B-5B. The density of the electromagnetic heating layer is tested by a DA-300M density tester. The heating efficiency test conditions are as follows: the electromagnetic induction heating ceramic pots containing 500mL of water in examples 1 to 4 and comparative examples 1 to 2 were placed on an induction cooker, water was boiled using 600W power, and the time required to boil the water to 100 ℃ was recorded as the heating time. T0 is the initial heating time, and T1 is the heating time after repeating the heating 100 times. Upon heating, examples 1-4 showed the distribution of copper elements in the electromagnetic heating layer by energy spectrum analysis, as shown in fig. 2. As can be seen from FIG. 2, copper is the exothermic material during the heating process of examples 1-4.
TABLE 1 Performance test Table for different electromagnetic heating materials after repeated heating for 100 times
Figure BDA0003018237260000071
As can be seen from Table 1, examples 1-4 all have a high bond strength between the layers. After 100 heating tests, the copper particle-coated electromagnetic induction heating ceramic pots of examples 1 to 4 have higher heating efficiency from the viewpoint of heating efficiency, and can boil water within 10 minutes, which is superior to that of comparative example 1. In particular, in examples 1 to 3, the mixing of the copper nanoparticles and the copper microparticles was still slightly longer than the initial heating time in comparative example 2, but the initial heating time was almost equal to that of the expensive silver magnetic conductive patch electromagnetic induction heating ceramic pot in comparative example 2, and it was considered to be a better choice. Particularly, after 100 times of use, the heating time of the copper particle coating electromagnetic induction heating ceramic pot in the embodiments 1 to 4 is basically unchanged, while the heating time of the silver magnetic conduction patch electromagnetic induction heating ceramic pot is obviously prolonged, so that the heating efficiency of the silver magnetic conduction patch can be greatly reduced due to the migration phenomenon of silver, and compared with the copper particle coating electromagnetic induction heating ceramic pot provided by the invention, the copper particle coating electromagnetic induction heating ceramic pot has longer service life.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it should be understood that the scope of the present invention is not limited thereto, and therefore, the present invention is intended to cover the equivalent changes made in the claims, such as the use of glass pot instead of ceramic pot, and still fall within the scope of the present invention.

Claims (10)

1. The novel electromagnetic induction heating ceramic pot and the preparation process thereof are characterized by comprising an electromagnetic heating layer, wherein the electromagnetic heating layer comprises the following components in parts by mass:
53 to 70 percent of copper powder
10-20% of low-melting-point nano glass powder
20-27% of organic carrier.
2. The novel electromagnetic induction heating ceramic pot of claim 1, further comprising a ceramic pot body, a transition layer, and a protection layer, wherein the electromagnetic heating layer is combined with the bottom of the ceramic pot body through the transition layer, and the protection layer covers the electromagnetic heating layer.
3. The novel electromagnetic induction heating ceramic pot of claim 1, wherein the copper powder comprises the following components in parts by volume:
70-85% of micron copper powder
And 15-30% of nano copper powder.
4. The novel electromagnetic induction heating ceramic pot according to claim 3, wherein the particle size of the micron copper powder is 2-15 μm; the particle size of the nano copper powder is 30-100 nm.
5. The electromagnetic induction heating ceramic pot of claim 1 wherein the low melting point nano glass powder is ZnO-Bi2O3-B2O3Ternary glass system glass powder; the thickness of the electromagnetic heating layer is 0.1-0.3 mm.
6. The electromagnetic induction heating ceramic pot of claim 2 wherein said transition layer is made of B having high thermal conductivity2O3-ZnO-Na2The O-series glass powder is sintered, and the thermal expansion coefficient of the glass powder is between the electromagnetic heating layer and the pot body.
7. The electromagnetic induction heating ceramic pot of claim 2 wherein the protective layer has a thermal expansion coefficient of 6-14×10-6The glass powder of the/K and the high-temperature resistant inorganic pigment are sintered; the thickness of the protective layer is 0.06-0.1 mm.
8. A process for preparing the novel electromagnetic induction heating ceramic pot as claimed in claim 2, which comprises the following steps:
(1) weighing the transition layer raw materials, uniformly mixing, coating the transition layer raw materials on the bottom surface of the ceramic pot body, drying and sintering to obtain the transition layer;
(2) weighing the copper powder, the low-melting-point nano glass powder and the organic carrier in proportion to prepare slurry, mixing and defoaming to obtain slurry with proper viscosity;
(3) coating the slurry with proper viscosity on the surface of the transition layer, and sintering under the protection of inert atmosphere to obtain the electromagnetic heating layer;
(4) weighing the raw materials of the protective layer, uniformly mixing, coating the raw materials on the electromagnetic heating layer, drying and sintering at a low temperature to obtain the protective layer;
(5) the pottery pot body the transition layer the electromagnetic heating layer the protective layer combines closely, can obtain novel electromagnetic induction heating pottery pot.
9. The preparation process of the novel electromagnetic induction heating ceramic pot as claimed in claim 8, characterized by comprising the following steps:
(1) weighing the transition layer raw materials, uniformly mixing, coating the transition layer raw materials on the bottom surface of the ceramic pot body, drying, and sintering at 850-950 ℃ to obtain the transition layer;
(2) weighing the copper powder, the low-melting-point nano glass powder and the organic carrier according to a ratio to prepare slurry, mixing for 30-60 min, and then defoaming in vacuum for 5-15 min to obtain slurry with proper viscosity;
(3) coating the slurry with proper viscosity on the surface of the transition layer, and carrying out heat preservation for 15-30 min at the temperature of 750-820 ℃ under the protection of inert atmosphere for sintering to obtain the electromagnetic heating layer;
(4) weighing the raw materials of the protective layer, uniformly mixing, coating the raw materials on the electromagnetic heating layer, drying, and sintering at a low temperature to obtain the protective layer;
(5) the pottery pot body the transition layer the electromagnetic heating layer the protective layer combines closely, can obtain novel electromagnetic induction heating pottery pot.
10. The process for preparing the novel electromagnetic induction heating ceramic pot as claimed in claims 8 and 9, wherein the coating comprises one of screen printing and spraying.
CN202110395118.9A 2021-04-13 2021-04-13 Novel electromagnetic induction heating ceramic pot and preparation process thereof Active CN113207204B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003204871A (en) * 2002-01-11 2003-07-22 Noritake Co Ltd Container for electromagnetic cooker
CN201216466Y (en) * 2008-06-12 2009-04-08 崔珂梅 Electromagnetic heating heat-proof ceramic and glass ovenware
CN111116233A (en) * 2019-12-11 2020-05-08 柯伟才 Magnetic conductive coating composition and magnetic conductive ceramic product
CN111958819A (en) * 2020-07-24 2020-11-20 汕头大学 Novel purple sand inner container and preparation process thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003204871A (en) * 2002-01-11 2003-07-22 Noritake Co Ltd Container for electromagnetic cooker
CN201216466Y (en) * 2008-06-12 2009-04-08 崔珂梅 Electromagnetic heating heat-proof ceramic and glass ovenware
CN111116233A (en) * 2019-12-11 2020-05-08 柯伟才 Magnetic conductive coating composition and magnetic conductive ceramic product
CN111958819A (en) * 2020-07-24 2020-11-20 汕头大学 Novel purple sand inner container and preparation process thereof

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