CN111166188B - Metal body and heating plate suitable for food utensil - Google Patents
Metal body and heating plate suitable for food utensil Download PDFInfo
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- CN111166188B CN111166188B CN202010078221.6A CN202010078221A CN111166188B CN 111166188 B CN111166188 B CN 111166188B CN 202010078221 A CN202010078221 A CN 202010078221A CN 111166188 B CN111166188 B CN 111166188B
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- glass powder
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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
- A47J36/025—Vessels with non-stick features, e.g. coatings
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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
- A47J36/04—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay the materials being non-metallic
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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
- A47J36/24—Warming devices
- A47J36/26—Devices for warming vessels containing drinks or food, especially by means of burners Warming devices with a burner, e.g. using gasoline; Travelling cookers, e.g. using petroleum or gasoline with one burner
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
Abstract
The invention discloses a metal body suitable for a food vessel, wherein a glass powder coating is coated on the metal body, and the glass powder coating can form a glass functional coating on the surface of the metal; the glass powder coating comprises 50-90 wt% of glass powder and 10-50 wt% of organic components. When the invention is used for manufacturing the full glass kettle, the problems of low cost, long service life, safety, mass production, easy cleaning and the like can be solved at the same time.
Description
Technical Field
The invention relates to the technical field of heating kettles, in particular to a metal body and a heating plate suitable for food utensils.
Background
Kettles are necessities of life, and products are continuously updated from gas kettles, intelligent plastic electric kettles, stainless steel electric kettles, half-glass kettles and full-glass kettles. The glass has stable physical characteristics, is safe and clean, does not produce chemical reaction with heated food, does not have the worry of heavy metal, and the transparent body of the glass can penetrate through far infrared rays, thereby improving the water quality and optimizing the water source.
The prior all-glass kettle mainly has the following technologies: transparent nanofilms, carbon films, and thick films. The former two kinds of power decay fast, which have been abandoned by various manufacturers, the latter has good power stability, but the process requirement is high, and the processing index of the glass body is strict, for example: smoothness, thickness uniformity, compactness, freedom from bubbles, craters, etc. Any one of the indexes can not reach the standard, the electrothermal film is easy to generate hot junction and micro-flash discharge, the instantaneous temperature rises, and finally, the glass body is broken. Further, the heat generating film needs to be matched with the temperature characteristics and thermal expansion coefficient of glass, and to be well adhered and wetted to the glass. And the heating film slurry is fired and tested after being prepared, the testing period is long, uncertain factors are large, and once the physical property of the glass is changed, the glass needs to be prepared again for a long time.
The processing level of the current glass at home and abroad can not meet the processing index. Therefore, a solution to replace the boron silicate glass with high economical efficiency with the quartz glass with high cost is available. However, the cost of quartz glass is several tens times that of borosilicate glass, and although the thickness, smoothness and bubble hollow of quartz are superior to those of borosilicate glass, the quartz has high melting point, so that the pot body is difficult to form and process, the cost is huge, and the quartz glass cannot be produced in mass.
In order to solve the inherent drawbacks of glass materials, other solutions have appeared over the years, such as: and (3) cutting the bottom glass kettle body, namely embedding the ceramic heating plate/microcrystalline heating plate and the silica gel sealing ring on the bottom glass kettle body to form the pseudo-full-glass health preserving kettle. Because the metal heating plate is directly contacted with the heating liquid, the heat transfer efficiency can be improved, but the concept of full glass is damaged, and in the process of heating and boiling food, the food and silica gel chemically react to cause pollution, color change and standard exceeding of heavy metals. Moreover, the transition place of the sealing ring and the heating element is often a dead angle for cleaning, and the safety and the sanitation can not be ensured. In addition, the sealing consistency of the above structure is not good, and mass production cannot be realized.
For another example: the heating film is directly attached to the kettle body, and local overheating is easily caused due to poor heat conduction of the kettle body material, so that the heating film is ablated due to overheating, and the kettle body is likely to break due to uneven cold and hot shrinkage of the kettle body material.
The following steps are repeated: the external radiation scheme, place the quartz heating pipe promptly at glass kettle bottom, heat flourishing water glass container, its shortcoming is: high bottom heat, glare by visible light, inaccurate control system, etc.
Namely, the current scheme of the all-glass kettle can not simultaneously meet the problems of low cost, long service life, safety, mass production, easy cleaning and the like.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a metal body suitable for food utensils, so that when the metal body is applied to manufacturing of an all-glass kettle, the problems of low cost, long service life, safety, mass production, easiness in cleaning and the like can be solved at the same time.
The invention aims to solve the technical problem of providing a heating plate suitable for food utensils, which can simultaneously solve the problems of low cost, long service life, safety, mass production, easy cleaning and the like when being applied to manufacturing an all-glass kettle.
In order to achieve the technical effects, the invention provides a metal body suitable for a food utensil, wherein the metal body is coated with a glass powder coating, and the glass powder coating can form a glass functional coating on the surface of the metal body;
the glass powder coating mainly comprises 50-90 wt% of glass powder and 10-50 wt% of organic components;
the glass powder comprises 17-100 wt% of glass powder component A and 0-83 wt% of glass powder component B, and the glass powder component A comprises SiO2、Al2O3、B2O3And CaO.
As an improvement of the above technical solution, the glass frit component a includes:
SiO2 5～60％，Al2O3 5～60％，B2O3 2～10％，CaO 5～60％。
as an improvement of the above technical solution, the glass frit component B includes:
MgO 0～5％，P2O5 0～5％，TiO2 0～5％，ZrO2 0～5％，ZnO 0～50％，K2O 0～5％，Na2O 0～5％，Li2O 0～10％。
as an improvement of the technical scheme, the glass powder is prepared by the following method:
and melting the glass powder component A and the glass powder component B uniformly at 1250-1450 ℃, quenching with water, drying and crushing to obtain the glass powder.
As an improvement of the technical scheme, the glass powder coating mainly comprises 50-80 wt% of glass powder, 10-40 wt% of organic components and 0.5-10 wt% of functional mixture;
the glass powder coating can form a glass functional coating with a far infrared radiation function on the surface of metal.
As an improvement of the technical scheme, the functional mixture comprises one or more of oxide, carbide, nitride and rare earth oxide.
As an improvement of the technical scheme, the functional mixture comprises one or more of iron oxide, nickel oxide, cobalt oxide, copper oxide, zinc oxide, silicon dioxide, silicon carbide, tungsten carbide, aluminum nitride, aluminum tungstate and rare earth oxide.
As an improvement of the technical scheme, the emissivity of the glass functional coating at an infrared radiation waveband of 9-50 mu m is more than 0.5.
As an improvement of the technical scheme, the emissivity of the glass functional coating at an infrared radiation waveband of 9-15 mu m is greater than 0.8.
As an improvement of the technical scheme, the organic component is resin or an alcohol solvent, the resin comprises ethyl cellulose, and the alcohol solvent comprises terpineol.
Correspondingly, the invention also provides a heating plate suitable for the food ware, wherein the heating plate is coated with glass powder coating, and the glass powder coating can form a glass functional coating on the surface of the heating plate;
the glass powder coating mainly comprises 50-90 wt% of glass powder and 10-50 wt% of organic components;
the glass powder comprises 17-100 wt% of glass powder component A and 0-83 wt% of glass powder component B, and the glass powder component A comprises SiO2、Al2O3、B2O3And CaO.
The implementation of the invention has the following beneficial effects:
the invention provides a metal body and a heating plate suitable for food utensils, wherein a layer of glass functional coating is formed on the metal surface of the metal body and the heating plate, so that the metal body has the functions of safety, sanitation and health care when being used at high temperature (for heating food). The metal body with the glass functional coating has the following advantages:
1. the heat resistance is good: the coating is intact without cracking and falling off after being subjected to cold and hot impact at 0-500 ℃;
2. the compactness is good: the coating can completely isolate the metal surface from air, and ensures that the metal is not oxidized when heated at high temperature; meanwhile, the coating has good insulativity, so that when the coating is used for an electric heating plate, the surface electrification can be avoided, and the requirement of electric safety is met;
3. the chemical stability is good: the coating essentially belongs to a microcrystal-glass mixture, has stable chemical property, does not separate out elements when used for heating food (400 ℃), has good acid and alkali resistance, can be directly contacted with food, and meets the requirement of food safety; the coating is smooth and flat, and is easy to clean when encountering oil stains;
4. specific far infrared radiation characteristics: in the temperature range of 50-200 ℃, the emissivity of the coating is more than 0.8 in an infrared radiation waveband of 9-15 microns, and the radiation waveband is also the infrared radiation fluctuation of water and a human body, so that the coating is used for heating water or food and has a health-care effect on the human body.
5. When the metal body with the glass functional coating is used for manufacturing the all-glass heating container, the metal body is used as a heating base, so that the problem of extremely low heat conductivity coefficient of glass is solved from the source, and high power is realized.
6. The metal body with the glass functional coating has excellent heat conductivity, and the working temperature of the heating plate is only about 109 ℃, so that the stability, reliability and life cycle of the heating plate are greatly improved.
Therefore, the glass functional coating is compact, smooth, flat, hard and stable in chemical property, so that when the glass functional coating is applied to manufacturing of an all-glass kettle, the problems of low cost, long service life, safety, mass production, easiness in cleaning and the like can be solved.
Drawings
Fig. 1 is a sectional view of a non-metallic heating kettle of the present invention.
FIG. 2 is a perspective view of the non-metallic kettle body of the present invention.
FIG. 3 is a front sectional view of the non-metallic kettle body of the present invention.
Fig. 4 is a partially enlarged view of a portion a shown in fig. 3.
FIG. 5 is a bottom view of the non-metallic kettle body of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
The current scheme of the all-glass kettle cannot simultaneously meet the problems of low cost, long service life, safety, mass production, easy cleaning and the like. Therefore, the invention provides a solution with a brand new thought, and the full-glass kettle is realized by additionally arranging a layer of glass functional coating on the metal heating plate of the heating base. The method has simple structure, easy cleaning and easy realization, but the glass and the metal belong to two completely different materials, the performance difference is very large, and the glass is a poor conductor of heat and is difficult to be connected with a metal heating plate. How to arrange a glass functional coating on the metal heating plate and solve the problems of firm connection, no cracking, no falling, long service life, safety, good heat-conducting property and the like, becomes a key point.
Therefore, the invention designs a metal body suitable for food utensils, wherein the metal body is coated with glass powder coating, and the glass powder coating can form a glass functional coating on the surface of the metal; the glass powder coating is mainly composed of 50-90 wt% of glass powder and 10-50 wt% of organic components.
The glass powder comprises 17-100 wt% of glass powder component A and 0-83 wt% of glass powder component B, and the glass powder component A comprises SiO2、Al2O3、B2O3And CaO. The glass powder component B comprises MgO and P2O5，TiO2，ZrO2，ZnO，K2O，Na2O，Li2One or more of O.
Preferably, the glass frit component a comprises: SiO 22 5～60％，Al2O3 5～60％，B2O32-10% of CaO and 5-60% of CaO. More preferably, the glass frit component a comprises: SiO 22 10～50％，Al2O310～50％，B2O33～8％，CaO 10～50％。
The glass powder component B comprises: MgO 0-5%, P2O5 0～5％，TiO2 0～5％，ZrO2 0～5％，ZnO 0～50％，K2O 0～5％，Na2O 0～5％，Li2O 0～10％。
Preferably, the glass frit component B comprises: 1 to 4% of MgO, P2O51～4％，TiO 21～4％，ZrO 21～4％，ZnO 10～50％，K2O 1～4％，Na2O 1～4％，Li2O 2～8％。
More preferably, the glass frit component B comprises: MgO 2-3%, P2O52～3％，TiO22～3％，ZrO22～3％，ZnO 15～35％，K2O 2～3％，Na2O 2～3％，Li2O 3～5％。
The glass powder component A is an essential component, the glass powder component B is a selectable component, and the glass powder component A and the glass powder component B can be matched with different metal material surfaces by adjusting the content ratio of different components in the glass powder component A and the glass powder component B to form a compact coating.
The glass powder is prepared by the following method:
mixing glass powder component A and glassAnd melting the powder component B uniformly at 1250-1450 ℃, quenching with water, drying and crushing to obtain the glass powder. Pulverizing the obtained powder D50＝2.5μm。
The common glass powder for sealing in the market can not simultaneously meet the requirements of matching metal surfaces, good heat resistance, good compactness, good chemical stability, safety, sanitation, specific far infrared radiation and the like. That is, the common glass powder for sealing in the market may not have a problem in matching with a metal substrate, but may contain heavy metals, and the use temperature is low, so that when the glass powder is used for a kettle, the glass powder is continuously subjected to cold and hot alternation and is easy to break.
The preferred embodiment of the glass powder coating is mainly composed of 50-80 wt% of glass powder, 0.5-10 wt% of functional mixture and 10-50 wt% of organic component. Preferably, the glass powder coating mainly comprises 55-75 wt% of glass powder, 2-10 wt% of functional mixture and 15-35 wt% of organic component. The glass powder coating can form a glass functional coating with a far infrared radiation function on the surface of metal.
The functional mixture is a mixture of various inorganic compounds, and mainly aims to realize a specific far infrared radiation function. The functional mixture comprises one or more of oxides, carbides, nitrides and rare earth oxides.
Specifically, the functional mixture comprises one or more of iron oxide, nickel oxide, cobalt oxide, copper oxide, zinc oxide, silicon dioxide, silicon carbide, tungsten carbide, aluminum nitride, aluminum tungstate and rare earth oxide, and the glass functional coating can be adjusted to have the optimal infrared radiation emissivity at different use temperatures through matching of the different compounds.
The glass powder for sealing which is commonly used in the market has no far infrared characteristic radiation function, is used for heating water or food, and has no health care effect on human bodies.
The organic component may be resin including ethyl cellulose or alcohol solvent including terpineol, but not limited thereto. The organic component is used as an auxiliary material to provide certain rheological property for the coating to form a continuous and uniform film layer.
The functional mixture is mixed with the glass powder and the organic component, and the glass powder coating can be prepared by fully stirring and uniformly dispersing. The glass powder coating can form a glass functional coating with a far infrared radiation function on the surface of metal. The thickness of the glass functional coating is 9-50 μm, preferably 9-15 μm, or 20-40 μm.
Within the temperature range of 50-200 ℃, the emissivity of the glass functional coating at an infrared radiation waveband of 9-50 mu m is more than 0.5.
Preferably, the emissivity of the glass functional coating in an infrared radiation waveband of 9-15 micrometers is greater than 0.8 within the temperature range of 50-200 ℃. Within the temperature range of 50-200 ℃, the emissivity of the glass functional coating at the infrared radiation waveband of 20-40 mu m is more than 0.8. The radiation wave band is also the infrared radiation fluctuation of water and human body, so the infrared radiation wave band is used for heating water or food and has health care effect on human body.
The metal body includes aluminum, copper, stainless steel, aluminum alloy, or copper alloy, but is not limited thereto. The coating can meet the requirements of various different metals, and the content proportions of different components in the glass powder component A and the glass powder component B are adjusted, so that the coating can be matched with the surfaces of different metal materials to form a compact coating. And the glass functional coating can be adjusted to have the optimal infrared radiation emissivity under different use temperatures by matching the functional mixture.
The coating is coated on a metal body to form a glass functional coating, and has the following advantages:
1. the heat resistance is good: the coating is intact without cracking and falling off after being subjected to cold and hot impact at 0-500 ℃; the thermal shock test method comprises the following steps: and (3) placing the prepared heating disc in a muffle furnace at 500 ℃ for constant temperature for 10min, taking out, quickly placing the heating disc in an ice-water mixture for water quenching, and performing cycle test for 100 times without obvious changes in appearance and electrical property.
2. The compactness is good: the coating can completely isolate the metal surface from air, and ensures that the metal is not oxidized when heated at high temperature; meanwhile, the coating has good insulativity, so that when the coating is used for an electric heating plate, the surface electrification can be avoided, and the requirement of electric safety is met; and (3) appearance testing: observed under an optical microscope with the power of 30 times, the surface has no obvious bulges and pits. And (3) drop test: the heating plate is placed at a height of 1.5m, freely falls on the ground of the ceramic tile, and is tested for 10 times in a circulating way, and the appearance and the electrical property of the heating plate are not obviously changed.
3. The chemical stability is good: the coating essentially belongs to a microcrystal-glass mixture, has stable chemical property, does not separate out elements when used for heating food (400 ℃), has good acid and alkali resistance, can be directly contacted with food, and meets the requirement of food safety; the coating is smooth and flat, and is easy to clean when encountering oil stains;
4. specific far infrared radiation characteristics: in the temperature range of 50-200 ℃, the emissivity of the coating is more than 0.8 in an infrared radiation waveband of 9-15 microns, and the radiation waveband is also the infrared radiation fluctuation of water and a human body, so that the coating is used for heating water or food and has a health-care effect on the human body.
Therefore, the glass functional coating is compact, smooth, flat, hard and stable in chemical property, so that when the glass functional coating is applied to manufacturing of an all-glass kettle, the problems of low cost, long service life, safety, mass production, easiness in cleaning and the like can be solved. Specifically, when the metal body with the glass functional coating is used for manufacturing the all-glass heating container, the metal body is used as a heating base, so that the problem of extremely low heat conductivity coefficient of glass is solved from the source, and high power is realized. In addition, the metal body with the glass functional coating has excellent heat conductivity, and the working temperature of the heating plate is only about 109 ℃, so that the stability, the reliability and the service life of the heating plate are greatly improved.
Further, the metal body is produced by the following method:
pretreating the surface of the metal body to make the surface smooth and flat;
uniformly coating the coating on the surface of the metal body in a spraying or printing mode;
and sintering the metal body coated with the coating at 600-1000 ℃ to form a compact, smooth, flat, hard and chemically stable glass functional coating on the surface of the metal body.
Correspondingly, the invention also discloses a heating plate suitable for the food utensil, wherein the heating plate is coated with glass powder coating, and the glass powder coating can form a glass functional coating on the surface of the heating plate; the glass powder coating mainly comprises 50-90 wt% of glass powder and 10-50 wt% of organic components; the glass powder comprises 17-100 wt% of glass powder component A and 0-83 wt% of glass powder component B, and the glass powder component A comprises SiO2、Al2O3、B2O3And CaO.
It should be noted that the technical details of the glass frit coating disposed on the heating plate are the same as those described above, and are not described herein again.
As shown in figure 1, the nonmetal heating device comprises a nonmetal kettle body 1, a heating base 2 and a function control base 3, wherein the nonmetal kettle body 1 and the heating base 2 are formed into an integrated structure and then placed on the function control base 3 to realize intelligent control of water boiling.
The heating base 2 comprises a heating disc 21, at least one layer of glass functional coating 22 is formed on the surface of the heating disc 21, the heating disc 21 is integrally formed with the nonmetal pot body 1 through the glass functional coating 22, and food in the nonmetal pot body 1 is separated from the heating disc 21 by the glass functional coating 22.
With reference to fig. 2 and 3, the non-metal pot body 1 is a pot body with a cut bottom.
It should be noted that the pot with the cut bottom only comprises a side wall, but is not provided with a bottom, and the side wall forms a hollow pot structure. The bottom of the pot body 1 with the cut bottom is connected with the glass functional coating 22 of the heating base to form a complete pot body structure.
The non-metal pot body 1 can be a glass pot body, a ceramic pot body or a quartz pot body, but is not limited thereto. Preferably, the non-metal kettle body is a glass kettle body.
As shown in fig. 5, the heat generating plate 21 is provided at the bottom of the glass functional coating 22, which is made of metal, such as aluminum, copper, stainless steel, aluminum alloy, or copper alloy. The heat generating plate 21 is preferably a heat generating film, but is not limited thereto.
Further, as shown in fig. 3 and 4, in order to ensure a better connection effect between the non-metal kettle body and the glass functional coating, the non-metal kettle body 11 with a cut bottom comprises a kettle body 11A and a concave part 11B or a convex part connected with the kettle body 11A, the concave part 11B or the convex part extends outwards or inwards to form a flat part 11C, and the flat part 11C is connected and fixed with the glass functional coating 22 through a glass powder coating.
Preferably, the width of the flat part is 2-5 mm. If the width of the flatness is less than 2mm, the compactness is poor, and water leakage or water seepage is easy to occur. If the width of the flatness is greater than 5mm, the heat transfer efficiency of the heating apparatus is affected.
The concave part 11B or the convex part may be provided with a fixing ring. The fixing ring can be designed in a matching way according to the appearance shape of a product, and a connecting piece can be arranged on the fixing ring and used for realizing the connection and fixation of the kettle body and the base.
The non-metal heating device can be a water boiling kettle, an electric stewing cup, an electric cooker and other kitchen appliances, but is not limited to the above. The heating device shown in fig. 1-4 is a kettle.
The invention uses the paint to form the glass functional coating on the surface of the heating plate, and the glass functional coating is connected with the glass kettle body to form the integrated all-glass heating kettle, and the all-glass heating kettle has stable, safe and clean properties, does not generate chemical reaction with heated food, has no worry of heavy metal, and is healthy and sanitary. Moreover, the all-glass heating kettle has good heat conducting performance, and can ensure that the heat emitted by the heating plate is uniformly and efficiently transferred to the kettle body and the heated liquid, thereby prolonging the service lives of the kettle body and the heating body, avoiding the fracture of the kettle body, avoiding the ablation of the heating body and avoiding the separation between the kettle body and the heating body.
Therefore, the nonmetal heating kettle with a brand new structure is adopted, and the problems of low cost, long service life, safety, mass production, easiness in cleaning and the like can be solved at the same time.
The invention is further illustrated by the following specific examples
Example 1
430 stainless steel surface forming glass function coating
1. Preparing glass powder: the glass powder is prepared from SiO2 29％，Al2O3 14％，B2O3 7％，CaO 45％，TiO2 3％，ZrO22 percent, the components are melted evenly at 1450 ℃, water quenched, dried and crushed to obtain D502.5 mu m powder to obtain glass powder;
2. preparing a coating: 38% of organic component and 62% of glass powder, fully stirring the components, and uniformly dispersing the components by a three-roller machine to obtain a coating with the viscosity of 1-2 pa.s;
3. cleaning the surface of 430 stainless steel, uniformly coating the coating on the surface of the stainless steel in a spraying mode, drying at 150 ℃, and then sintering at 850 ℃ for 10min to obtain a semitransparent coating with the thickness of about 20-40 mu m;
4. the coating can be used for the surface of 430 stainless steel, stably works at the temperature of below 400 ℃, and can be used for the surface treatment of a heating disc of a heater.
The translucent coating was tested and the results were as follows:
example 2
430 stainless steel surface forming glass function coating
1. Preparing glass powder: the glass powder is prepared from SiO2 32％，Al2O3 12％，B2O3 7％，CaO 45％，TiO2 2％，ZrO22 percent, the components are melted evenly at 1450 ℃, water quenched, dried and crushed to obtain D502.5 mu m powder to obtain glass powder;
2. the proportion of the functional mixture is as follows: 60% of tungsten carbide, 25% of iron oxide and 15% of zinc oxide;
3. preparing a coating: 40% of organic component, 50% of glass powder and 10% of functional mixture, fully stirring the components, and uniformly dispersing the components by a three-roller machine to obtain a coating with the viscosity of 1-2 pa.s;
4. cleaning the surface of 430 stainless steel, uniformly coating the coating on the surface of the stainless steel in a spraying mode, drying at 150 ℃, and then sintering at 850 ℃ for 10min to obtain a semitransparent coating with the thickness of about 9-15 mu m;
5. the coating can be used on the surface of 430 stainless steel, stably works at the temperature of below 400 ℃, has obvious far infrared radiation characteristic, and can be used for surface treatment of a heating disc of a heating device.
The translucent coating was tested and the results were as follows:
example 3
Forming glass functional coating on the surface of the aluminum substrate
1. Preparing glass powder: the glass powder is prepared from SiO2 5％，Al2O3 30％，B2O3 8％，CaO 50％，TiO23％，ZrO2 3％，K2O1%, melting the above components at 1250 deg.C, quenching in water, oven drying, and pulverizing to obtain D502.5 mu m powder to obtain glass powder;
2. preparing a coating: 25% of organic component and 75% of glass powder, fully stirring the components, and uniformly dispersing the components by a three-roller machine to obtain a coating with viscosity of 20-30 pa.s;
3. cleaning the surface of an aluminum substrate, uniformly coating a coating on the surface of the aluminum substrate by adopting a screen printing mode, drying at 150 ℃, and then sintering at 650 ℃ for 10min to obtain a semitransparent coating with the thickness of about 20-40 mu m;
4. the coating can be used for the surface of an aluminum substrate, can stably work below 300 ℃, and can be used for the surface treatment of a heating disc of a partial heating electric appliance.
The translucent coating was tested and the results were as follows:
example 4
Forming glass functional coating on the surface of the aluminum substrate
1. Preparing glass powder: the glass powder is prepared from SiO2 10％，Al2O3 25％，B2O3 10％，CaO 50％，TiO2 2％，ZrO2 2％，K2O1%, melting the above components at 1250 deg.C, quenching in water, oven drying, and pulverizing to obtain D502.5 mu m powder to obtain glass powder;
2. the proportion of the functional mixture is as follows: 70% of silicon dioxide, 20% of ferric oxide and 10% of copper oxide;
3. preparing a coating: 25% of organic component, 70% of glass powder and 5% of functional mixture, fully stirring the components, and uniformly dispersing the components by a three-roller machine to obtain a coating with viscosity of 20-30 pa.s;
4. cleaning the surface of an aluminum substrate, uniformly coating a coating on the surface of the aluminum substrate by adopting a screen printing mode, drying at 150 ℃, and then sintering at 650 ℃ for 10min to obtain a semitransparent coating with the thickness of about 20-40 mu m;
5. the coating can be used for the surface of an aluminum substrate, can stably work below 300 ℃, has obvious far infrared radiation characteristic, and can be used for the surface treatment of a heating disc of a partial heating electric appliance.
The translucent coating was tested and the results were as follows:
example 5
Forming glass functional coating on the surface of 304 stainless steel
1. Preparing glass powder: the glass powder is prepared from SiO2 56％，P2O5 3％，Li2O 6％，CaO 0.5％，K2O 2.5％，ZnO 28％，B2O34 percent, the components are melted evenly at 1450 ℃, water quenched, dried and crushed to obtain the productD50 is 2.5 mu m powder, thus obtaining glass powder;
2. the proportion of the functional mixture is as follows: 60% of silicon carbide, 20% of cobalt oxide and 20% of copper oxide;
3. preparing a coating: the coating is prepared by mixing 35% of organic components, 62% of glass powder and 3% of functional mixture, fully stirring the components, and uniformly dispersing the components by a three-roll machine to obtain a coating with the viscosity of 1-2 pa.s;
4. cleaning the surface of 304 stainless steel, uniformly coating the coating on the surface of the stainless steel in a spraying mode, drying at 150 ℃, and then sintering at 850 ℃ for 10min to obtain a semitransparent coating with the thickness of about 20-40 mu m;
5. the coating can be used for the surface of 304 stainless steel, stably works at the temperature of below 400 ℃, has obvious far infrared radiation characteristic, and can be used for the surface treatment of a heating disc of a heating device.
The translucent coating was tested and the results were as follows:
example 6
Forming glass functional coating on the surface of 304 stainless steel
1. Preparing glass powder: the glass powder is prepared from SiO2 15％，Al2O319％，P2O5 3％，Li2O 6％，CaO 0.5％，K2O 2.5％，ZnO 50％，B2O34 percent of the components are melted uniformly at 1450 ℃, water quenched, dried and crushed to obtain powder with D50 being 2.5 mu m, thus obtaining glass powder;
2. the proportion of the functional mixture is as follows: 60% of silicon carbide, 20% of ferric oxide and 20% of copper oxide;
3. preparing a coating: 19% of organic component, 80% of glass powder and 1% of functional mixture, fully stirring the components, and uniformly dispersing the components by a three-roller machine to obtain a coating with the viscosity of 1-2 pa.s;
4. cleaning the surface of 304 stainless steel, uniformly coating the coating on the surface of the stainless steel in a spraying mode, drying at 150 ℃, and then sintering at 850 ℃ for 10min to obtain a semitransparent coating with the thickness of about 20-40 mu m;
5. the coating can be used for the surface of 304 stainless steel, stably works at the temperature of below 400 ℃, has obvious far infrared radiation characteristic, and can be used for the surface treatment of a heating disc of a heating device.
The translucent coating was tested and the results were as follows:
while the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (7)
1. A metal body suitable for food utensils is characterized in that a glass powder coating is coated on the metal body, and the glass powder coating can form a glass functional coating on the surface of the metal body;
the glass powder coating mainly comprises 50-90 wt% of glass powder and 10-50 wt% of organic components;
the glass powder comprises 17-100 wt% of a glass powder component A and 0-83 wt% of a glass powder component B,
the glass powder component A comprises:
SiO2 5～60％，Al2O3 5～60％，B2O3 2～10％，CaO 5～60％；
the glass powder component B comprises:
MgO 0～5％，P2O5 0～5％，TiO2 0～5％，ZrO2 0～5％，ZnO 0～50％，K2O 0～5％，Na2O 0～5％，Li2O 0～10％；
the glass powder is prepared by the following method:
melting the glass powder component A and the glass powder component B uniformly at 1250-1450 ℃, quenching with water, drying and crushing to obtain glass powder;
the thickness of the glass functional coating is 9-50 mu m.
2. The food-well metal body according to claim 1, wherein the glass frit coating consists essentially of 50 to 80 wt% of glass frit, 10 to 40 wt% of organic component and 0.5 to 10 wt% of functional mixture;
the glass powder coating can form a glass functional coating with a far infrared radiation function on the surface of metal.
3. The food-vessel compatible metal body of claim 2, wherein the functional mixture comprises one or more of an oxide, a carbide, and a nitride.
4. A body suitable for use in a food vessel according to claim 3 wherein the functional mixture comprises one or more of iron oxide, nickel oxide, cobalt oxide, copper oxide, zinc oxide, silica, silicon carbide, tungsten carbide, aluminium nitride, aluminium tungstate, rare earth oxides.
5. The metal body suitable for use in a food utensil of claim 2 wherein the glass functional coating has an emissivity >0.5 in the infrared radiation band of 9 to 50 μm.
6. The food-item well suited metal body of claim 1 wherein said organic component is a resin comprising ethyl cellulose or an alcohol solvent comprising terpineol.
7. A heating plate suitable for food utensils is characterized in that a glass powder coating is coated on the heating plate and can form a glass functional coating on the surface of the heating plate;
the glass powder coating mainly comprises 50-90 wt% of glass powder and 10-50 wt% of organic components;
the glass powder comprises 17-100 wt% of a glass powder component A and 0-83 wt% of a glass powder component B,
the glass powder component A comprises:
SiO2 5～60％，Al2O3 5～60％，B2O3 2～10％，CaO 5～60％；
the glass powder component B comprises:
MgO 0～5％，P2O5 0～5％，TiO2 0～5％，ZrO2 0～5％，ZnO 0～50％，K2O 0～5％，Na2O 0～5％，Li2O 0～10％；
the glass powder is prepared by the following method:
melting the glass powder component A and the glass powder component B uniformly at 1250-1450 ℃, quenching with water, drying and crushing to obtain glass powder;
the thickness of the glass functional coating is 9-50 mu m.
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| CN201910097392.0A CN109730540A (en) | 2019-01-31 | 2019-01-31 | Metallic object and heat-generating disc suitable for food container |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130336A (en) * | 1995-03-02 | 1996-09-04 | 刘永芬 | Surface uncharged direct heating infrared radiation heater |
| CN101152974A (en) * | 2005-10-01 | 2008-04-02 | 肖特股份有限公司 | Glassceramic topplate for a cooking device with an underneath coating and a method of manufacturing it |
| CN102010126A (en) * | 2009-09-07 | 2011-04-13 | 上海歌灵新材料科技有限公司 | Lead-free frit for glass color ceramic glaze and preparation method thereof |
| CN204292968U (en) * | 2014-11-27 | 2015-04-29 | 中山市新纪元电器有限公司 | A kind of kettle courage device with quartz glass plate |
| CN104858434A (en) * | 2015-04-21 | 2015-08-26 | 中国人民解放军国防科学技术大学 | Oxide-enhanced-oxide-based composite material coated with high-temperature-resistant low infrared emissivity coating and preparation method of composite material |
| CN107935567A (en) * | 2017-12-05 | 2018-04-20 | 海南中航特玻科技有限公司 | A kind of ceramic base spacing reflection mirror composite mirrors blank material material |
-
2019
- 2019-01-31 CN CN201910097392.0A patent/CN109730540A/en not_active Withdrawn
-
2020
- 2020-01-23 CN CN202010078221.6A patent/CN111166188B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130336A (en) * | 1995-03-02 | 1996-09-04 | 刘永芬 | Surface uncharged direct heating infrared radiation heater |
| CN101152974A (en) * | 2005-10-01 | 2008-04-02 | 肖特股份有限公司 | Glassceramic topplate for a cooking device with an underneath coating and a method of manufacturing it |
| CN102010126A (en) * | 2009-09-07 | 2011-04-13 | 上海歌灵新材料科技有限公司 | Lead-free frit for glass color ceramic glaze and preparation method thereof |
| CN204292968U (en) * | 2014-11-27 | 2015-04-29 | 中山市新纪元电器有限公司 | A kind of kettle courage device with quartz glass plate |
| CN104858434A (en) * | 2015-04-21 | 2015-08-26 | 中国人民解放军国防科学技术大学 | Oxide-enhanced-oxide-based composite material coated with high-temperature-resistant low infrared emissivity coating and preparation method of composite material |
| CN107935567A (en) * | 2017-12-05 | 2018-04-20 | 海南中航特玻科技有限公司 | A kind of ceramic base spacing reflection mirror composite mirrors blank material material |
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| CN111166188A (en) | 2020-05-19 |
| CN109730540A (en) | 2019-05-10 |
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