CN110983230A - Heat-insulating coating of electromagnetic pot and preparation method thereof - Google Patents
Heat-insulating coating of electromagnetic pot and preparation method thereof Download PDFInfo
- Publication number
- CN110983230A CN110983230A CN201911351902.9A CN201911351902A CN110983230A CN 110983230 A CN110983230 A CN 110983230A CN 201911351902 A CN201911351902 A CN 201911351902A CN 110983230 A CN110983230 A CN 110983230A
- Authority
- CN
- China
- Prior art keywords
- ceramic powder
- zirconia
- electromagnetic
- heat
- weight percentage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
-
- 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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Food Science & Technology (AREA)
- Coating By Spraying Or Casting (AREA)
- Cookers (AREA)
Abstract
The invention provides a heat-insulating coating of an electromagnetic cooker and a preparation method thereof, belonging to the technical field of cooking utensils. The thermal-spraying process is adopted to spray the zirconia ceramic powder on the outer surface of the electromagnetic pot substrate to prepare the thermal-insulation coating, wherein the zirconia ceramic powder consists of zirconia and a stabilizing agent, the obtained thermal-insulation coating has strong bonding force with the substrate, contains more pores and has low thermal conductivity, the heat loss can be obviously reduced, the good energy-saving effect is achieved, and the thermal-insulation coating is uniform, stable and wear-resistant, has a simple preparation method and is easy for industrial production.
Description
Technical Field
The invention belongs to the technical field of cooking appliances, and particularly relates to a heat-insulating coating of an electromagnetic pot and a preparation method thereof.
Background
The induction cooker and the matched induction cooker are popular with people. As is known, in electromagnetic pot heating, alternating current is used to generate an alternating magnetic field whose direction changes constantly through a coil, and eddy current (the reason can refer to faraday's law of electromagnetic induction) will appear inside a conductor in the alternating magnetic field, which is caused by the eddy electric field pushing a carrier (electrons but not iron atoms in the pot) in the conductor to move; the joule heating effect of the eddy current heats the conductor, thereby achieving heating. However, it is always the research direction of people to reduce the heat loss from the outer surface of the pot while the electromagnetic pot heats the food.
Disclosure of Invention
In order to overcome the above disadvantages and shortcomings of the prior art, the present invention aims to provide a thermal insulation coating for an electromagnetic cooker and a preparation method thereof, so as to reduce the dissipation of heat in the cooker, concentrate the heat in the cooker, achieve better heat preservation effect and energy saving effect, and solve the problem of overheating of the electromagnetic cooker.
In order to achieve the purpose, the invention adopts the technical scheme that:
in a first aspect, the invention provides a preparation method of a heat insulation coating of an electromagnetic cooker, which comprises the step of spraying zirconia ceramic powder on the outer surface of an electromagnetic cooker substrate by adopting a thermal spraying process to obtain the heat insulation coating, wherein the zirconia ceramic powder consists of zirconia and a stabilizer. The preparation method adopts a thermal spraying process, so that the production efficiency is high, the prepared coating has good quality, and the prepared coating inevitably has some air holes which enable the coating to have lower thermal conductivity and better heat insulation effect. In addition, the thermal insulation coating prepared by the preparation method is a low-density zirconia coating, has stable chemical properties, can resist the corrosion of acid atmosphere, high-temperature fuel gas and various metal oxide and salt solutions, and has low thermal conductivity of zirconia (2.1-2.2 W.m)-2·K-1) The heat insulation coating is wear-resistant, and the heat insulation coating is endowed with good heat insulation property and wear resistance.
As a preferred embodiment of the production method of the present invention, the production method comprises the steps of:
(1) carrying out sand blasting treatment on the outer surface of the electromagnetic pan base body;
(2) and (2) preparing the heat insulation coating on the outer surface of the electromagnetic cooker substrate treated in the step (1) by adopting a plasma spraying process.
As a preferred embodiment of the preparation method of the invention, the thermal barrier coating has a porosity of 4-20%.
As a further preferable embodiment of the preparation method of the present invention, the thermal barrier coating has a porosity of 12 to 20%.
As a preferable embodiment of the preparation method of the present invention, in the step (1), the blasting material used for the blasting is alumina sand of 12 to 80 mesh, and the blasting pressure is 0.1 to 0.4 MPa.
As a further preferable embodiment of the preparation method of the present invention, in the step (1), the alumina sand has a particle size of 24 to 48 mesh and a blasting pressure of 0.2 to 0.35 MPa.
As a preferable embodiment of the preparation method of the present invention, the stabilizer is at least one of yttrium oxide, magnesium oxide, calcium oxide, and cerium oxide.
As a further preferred embodiment of the preparation method of the present invention, the stabilizer is yttria.
As a preferable embodiment of the preparation method, in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is less than 1 percent, the weight percentage of impurities is less than or equal to 2 percent, and the weight percentage of yttria is 6 to 13 percent; the particle size of the zirconia ceramic powder is 100-400 meshes.
As a further preferable embodiment of the preparation method of the invention, in the zirconia ceramic powder, the weight percentage of impurities is less than 1 percent, and the weight percentage of yttria is 7 to 9 percent; the particle size of the zirconia ceramic powder is 200-325 meshes.
As a preferred embodiment of the preparation method of the present invention, in the step (2), the plasma spraying process uses hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 130-.
As a further preferred embodiment of the preparation method of the present invention, in the step (2), the plasma spraying process uses hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140-.
As a preferred embodiment of the preparation method of the present invention, the thickness of the thermal barrier coating is 30 to 50 μm. The inventors found in the course of their studies that there is a risk of cracking when the thickness exceeds 50 μm.
As a further preferable embodiment of the preparation method of the present invention, the thickness of the thermal insulation coating is 30 to 45 μm.
As a preferred embodiment of the preparation method of the present invention, the electromagnetic cooker base body is mainly prepared from aluminum, aluminum alloy, iron or stainless steel with good heat conductivity, and a magnetic conductive coating is coated on the inner surface of the electromagnetic cooker base body, so that eddy current heating is formed on the magnetic conductive coating, and the eddy current heating is more uniformly and rapidly transferred to food in the cooker through the heat conduction of the cooker.
In a second aspect, the invention also provides the thermal insulation coating prepared by the preparation method.
Compared with the prior art, the invention has the following advantages and beneficial effects: the heat insulation coating of the electromagnetic pot is mainly prepared from zirconium oxide, has strong binding force with a matrix, contains more air holes, has low heat conductivity, can obviously reduce heat loss and achieve good energy-saving effect, and is uniform, stable, wear-resistant, simple in preparation method and easy for industrial production.
Drawings
FIG. 1 is a schematic structural view of an electromagnetic pan body to which the thermal insulation coating of the present invention is applied.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 24-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220 meshes in 100 meshes, and in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is 0.9 percent, the weight percentage of impurities is 0.2 percent, and the weight percentage of yttria is 8 percent; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 160A, the argon flow is 35L/min, the hydrogen flow is 12L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 41 mu m.
Example 2
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 24-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage content of monoclinic phase zirconia is 0.8%, the weight percentage content of impurities is 0.5%, and the weight percentage content of yttria is 8%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 160A, the argon flow is 35L/min, the hydrogen flow is 12L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 39 mu m.
Example 3
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 24-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 200-400 meshes, and in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is 0.7%, the weight percentage of impurities is 1%, and the weight percentage of yttria is 8%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 160A, the argon flow is 35L/min, the hydrogen flow is 12L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 40 mu m.
Example 4
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 24-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage content of monoclinic phase zirconia is 0.6%, the weight percentage content of impurities is 1.3%, and the weight percentage content of yttria is 6%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 170A, the argon flow is 35L/min, the hydrogen flow is 12L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 40 mu m.
Example 5
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 24-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage content of monoclinic phase zirconia is 0.4%, the weight percentage content of impurities is 1.5%, and the weight percentage content of yttria is 13%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: 130A of current, 35L/min of argon flow, 12L/min of hydrogen flow, 140g/min of powder feeding rate, 180mm of spraying distance and 39 mu m of heat insulation coating thickness.
Example 6
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 12-mesh alumina sand, wherein the sand blasting pressure is 0.2 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 200-mesh and 325-mesh, and in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is 1%, the weight percentage of impurities is 1.8%, and the weight percentage of yttria is 7%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140A, the argon flow is 35L/min, the hydrogen flow is 10L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 40 mu m.
Example 7
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 48-mesh alumina sand, wherein the sand blasting pressure is 0.4 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is 1%, the weight percentage of impurities is 2%, and the weight percentage of yttria is 7%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140A, the argon flow is 35L/min, the hydrogen flow is 13.5L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 39 mu m.
Example 8
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 80-mesh alumina sand, wherein the sand blasting pressure is 0.1 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is 1%, the weight percentage of impurities is 0.5%, and the weight percentage of yttria is 9%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140A, the argon flow is 35L/min, the hydrogen flow is 11L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 42 mu m.
Example 9
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 80-mesh alumina sand, wherein the sand blasting pressure is 0.15 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage content of monoclinic phase zirconia is 0.8%, the weight percentage content of impurities is 0.5%, and the weight percentage content of yttria is 10%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140A, the argon flow is 30L/min, the hydrogen flow is 12L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 31 mu m.
Example 10
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 48-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage content of monoclinic phase zirconia is 0.8%, the weight percentage content of impurities is 0.5%, and the weight percentage content of yttria is 11%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140A, the argon flow is 45L/min, the hydrogen flow is 12L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 42 mu m.
Example 11
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 48-mesh alumina sand, wherein the sand blasting pressure is 0.4 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage content of monoclinic phase zirconia is 0.8%, the weight percentage content of impurities is 0.5%, and the weight percentage content of yttria is 12%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140A, the argon flow is 34L/min, the hydrogen flow is 12L/min, the powder feeding speed is 90g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 41 mu m.
Example 12
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 48-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage content of monoclinic phase zirconia is 0.8%, the weight percentage content of impurities is 0.5%, and the weight percentage content of yttria is 7%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140A, the argon flow is 34L/min, the hydrogen flow is 11L/min, the powder feeding speed is 150g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 41 mu m.
Example 13
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 48-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage content of monoclinic phase zirconia is 0.8%, the weight percentage content of impurities is 0.5%, and the weight percentage content of yttria is 7%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140A, the argon flow is 45L/min, the hydrogen flow is 11L/min, the powder feeding speed is 140g/min, the spraying distance is 120mm, and the thickness of the heat insulation coating is 39 mu m.
Example 14
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 48-mesh alumina sand, wherein the sand blasting pressure is 0.25 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage content of monoclinic phase zirconia is 0.8%, the weight percentage content of impurities is 0.5%, and the weight percentage content of yttria is 9%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 150A, the argon flow is 45L/min, the hydrogen flow is 11L/min, the powder feeding speed is 140g/min, the spraying distance is 200mm, and the thickness of the heat insulation coating is 39 mu m.
Example 15
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 80-mesh alumina sand, wherein the sand blasting pressure is 0.25 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage content of monoclinic phase zirconia is 0.8%, the weight percentage content of impurities is 0.5%, and the weight percentage content of yttria is 9%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 150A, the argon flow is 30L/min, the hydrogen flow is 11L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 30 mu m.
Example 16
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 80-mesh alumina sand, wherein the sand blasting pressure is 0.25 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 200-325 meshes, and in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is 0.8 percent, the weight percentage of impurities is 0.5 percent, and the weight percentage of yttria is 9 percent; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 150A, the argon flow is 30L/min, the hydrogen flow is 11L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 49 mu m.
Example 17
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 80-mesh alumina sand, wherein the sand blasting pressure is 0.25 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of 304 stainless steel; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 200-325 meshes, and in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is 0.8 percent, the weight percentage of impurities is 0.5 percent, and the weight percentage of yttria is 9 percent; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140A, the argon flow is 30L/min, the hydrogen flow is 11L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 41 mu m.
Example 18
The embodiment is an embodiment of a method for preparing a heat-insulating coating of an electromagnetic cooker, and the method comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 80-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of 304 stainless steel; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 200-325 meshes, and in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is 0.8 percent, the weight percentage of impurities is 0.5 percent, and the weight percentage of yttria is 9 percent; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140A, the argon flow is 30L/min, the hydrogen flow is 11L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 46 mu m.
Comparative example 1
The comparative example relates to a preparation method of a heat-insulating coating of an electromagnetic pan, which comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 24-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is 3%, the weight percentage of impurities is 0.5%, and the weight percentage of yttria is 7%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140A, the argon flow is 30L/min, the hydrogen flow is 11L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 30 mu m.
Comparative example 2
The comparative example relates to a preparation method of a heat-insulating coating of an electromagnetic pan, which comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 24-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 60-80 meshes, and in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is 0.8%, the weight percentage of impurities is 0.5%, and the weight percentage of yttria is 7%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140A, the argon flow is 30L/min, the hydrogen flow is 11L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 29 mu m.
Comparative example 3
The comparative example relates to a preparation method of a heat-insulating coating of an electromagnetic pan, which comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 24-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 400-plus-500 meshes, and in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is 0.8 percent, the weight percentage of impurities is 0.5 percent, and the weight percentage of yttria is 7 percent; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140A, the argon flow is 30L/min, the hydrogen flow is 11L/min, the powder feeding speed is 140g/min, and the spraying distance is 180 mm. The inventors have found that the thermal barrier coating cannot be sprayed under the conditions of the present comparative example.
Comparative example 4
The comparative example relates to a preparation method of a heat-insulating coating of an electromagnetic pan, which comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 24-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is 3%, the weight percentage of impurities is 0.5%, and the weight percentage of yttria is 7%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 200A, the argon flow is 30L/min, the hydrogen flow is 12L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 41 mu m.
Comparative example 5
The comparative example relates to a preparation method of a heat-insulating coating of an electromagnetic pan, which comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 24-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of aluminum; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is 3%, the weight percentage of impurities is 0.5%, and the weight percentage of yttria is 7%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 150A, the argon flow is 20L/min, the hydrogen flow is 15L/min, the powder feeding speed is 140g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 41 mu m.
Comparative example 6
The comparative example relates to a preparation method of a heat-insulating coating of an electromagnetic pan, which comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 48-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of 304 stainless steel; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage content of monoclinic phase zirconia is 0.8%, the weight percentage content of impurities is 0.5%, and the weight percentage content of yttria is 7%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 150A, the argon flow is 30L/min, the hydrogen flow is 12L/min, the powder feeding speed is 60g/min, the spraying distance is 180mm, and the thickness of the heat insulation coating is 29 mu m.
Comparative example 7
The comparative example relates to a preparation method of a heat-insulating coating of an electromagnetic pan, which comprises the following steps:
(1) firstly, protecting the non-spraying surface of the electromagnetic cooker by using a high-temperature adhesive tape or a protection tool, and then carrying out sand blasting treatment on the outer surface of the electromagnetic cooker matrix by using 24-mesh alumina sand, wherein the sand blasting pressure is 0.3 Mpa;
(2) spraying zirconium oxide ceramic powder on the outer surface of the electromagnetic pot substrate treated in the step (1) by adopting a plasma spraying process to obtain the heat-insulating coating, wherein the electromagnetic pot substrate is made of 304 stainless steel; the zirconia ceramic powder consists of zirconia and yttria, the granularity is 220-300 meshes, and in the zirconia ceramic powder, the weight percentage content of monoclinic phase zirconia is 0.8%, the weight percentage content of impurities is 0.5%, and the weight percentage content of yttria is 8%; the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 160A, the argon flow is 35L/min, the hydrogen flow is 12L/min, the powder feeding speed is 160g/min, the spraying distance is 100mm, and the thickness of the heat insulation coating is 61 mu m.
Comparative example 8
The comparative example relates to an electromagnetic cooker, the base material of which is aluminum without a heat-insulating coating.
Comparative example 9
The comparative example relates to an electromagnetic cooker, wherein the base body is made of 304 stainless steel and is not provided with a heat insulation coating.
The power consumption performance tests of the electromagnetic pots of examples 1 to 18 and the comparative example (the base specification is the same) are as follows: in an environment of 25 ℃, 2L of water is added into an electromagnetic cooker, the electromagnetic cooker is heated by adopting the same 'hot pot' mode of the electromagnetic cooker, the heating gear is selected to be 1.5kw, the initial water temperature is 25 ℃, the power consumption for heating for 30min is recorded, and the result is shown in Table 1. Meanwhile, the porosity of the insulating coating of the electromagnetic cooker was also measured, and the results are shown in table 1.
TABLE 1
According to the embodiments and the comparative example, the thermal insulation coating is sprayed on the surface of the cookware by using the plasma spraying process, so that the heat loss of the cookware can be effectively reduced, the heat is concentrated in the pot, and a better heat preservation effect and an energy-saving effect are achieved. Particularly, when the granularity of the alumina sand is 24-48 meshes, the sand blasting pressure is 0.2-0.35Mpa, the granularity of the zirconia ceramic powder is 200-325 meshes, the weight percentage of monoclinic phase zirconia is less than 1%, the weight percentage of impurities is less than 1%, the weight percentage of yttrium oxide is 7-9%, the current is 140-160A-.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The preparation method of the electromagnetic cooker heat-insulating coating is characterized in that the preparation method comprises the step of spraying zirconia ceramic powder on the outer surface of an electromagnetic cooker substrate by adopting a thermal spraying process to obtain the heat-insulating coating, wherein the zirconia ceramic powder consists of zirconia and a stabilizer.
2. The method of claim 1, comprising the steps of:
(1) carrying out sand blasting treatment on the outer surface of the electromagnetic pan base body;
(2) and (2) preparing the heat insulation coating on the outer surface of the electromagnetic cooker substrate treated in the step (1) by adopting a plasma spraying process.
3. The method of claim 2, wherein the thermal barrier coating has a porosity of 4-20%.
4. The method of claim 3, wherein the thermal barrier coating has a porosity of 12-20%.
5. The method according to claim 2, wherein in the step (1), the blasting material is alumina sand of 12-80 mesh, and the blasting pressure is 0.1-0.4 Mpa.
6. The method according to claim 5, wherein in the step (1), the alumina sand has a particle size of 24 to 48 mesh and a blasting pressure of 0.2 to 0.35 MPa.
7. The method according to claim 2, wherein the stabilizer is at least one of yttrium oxide, magnesium oxide, calcium oxide, and cerium oxide.
8. The method of claim 7, wherein the stabilizer is yttria; in the zirconia ceramic powder, the weight percentage of monoclinic phase zirconia is less than 1 percent, the weight percentage of impurities is less than or equal to 2 percent, and the weight percentage of yttrium oxide is 6 to 13 percent; the granularity of the zirconia ceramic powder is 100-400 meshes; in the step (2), the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 130-.
9. The method according to claim 8, wherein the zirconia ceramic powder contains less than 1% by weight of impurities and 7-9% by weight of yttria; the granularity of the zirconia ceramic powder is 200-325 meshes; in the step (2), the plasma spraying process takes hydrogen and argon as plasma gas, and the process parameters are as follows: the current is 140-.
10. The thermal barrier coating produced by the production method according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911351902.9A CN110983230A (en) | 2019-12-23 | 2019-12-23 | Heat-insulating coating of electromagnetic pot and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911351902.9A CN110983230A (en) | 2019-12-23 | 2019-12-23 | Heat-insulating coating of electromagnetic pot and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110983230A true CN110983230A (en) | 2020-04-10 |
Family
ID=70075193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911351902.9A Pending CN110983230A (en) | 2019-12-23 | 2019-12-23 | Heat-insulating coating of electromagnetic pot and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110983230A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112301306A (en) * | 2020-09-28 | 2021-02-02 | 华帝股份有限公司 | High-temperature-resistant heat insulation assembly and preparation method thereof |
| CN115142005A (en) * | 2021-04-15 | 2022-10-04 | 浙江福腾宝家居用品有限公司 | Cooking utensil and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1985725A (en) * | 2006-08-14 | 2007-06-27 | 张家兴 | Energy-saving pot and its making process |
| CN102925871A (en) * | 2012-10-25 | 2013-02-13 | 西安交通大学 | Composite thermal barrier coating and preparation method thereof |
| EP2805021A1 (en) * | 2012-01-16 | 2014-11-26 | Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for producing a ceramic layer on a surface formed from an ni base alloy |
| CN108784387A (en) * | 2017-05-02 | 2018-11-13 | 佛山市顺德区美的电热电器制造有限公司 | Cookware and preparation method thereof, cooking apparatus |
| CN109355610A (en) * | 2018-09-30 | 2019-02-19 | 中国科学院宁波材料技术与工程研究所 | A kind of metallic matrix electromagnetic heating coating and its preparation method and application |
-
2019
- 2019-12-23 CN CN201911351902.9A patent/CN110983230A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1985725A (en) * | 2006-08-14 | 2007-06-27 | 张家兴 | Energy-saving pot and its making process |
| EP2805021A1 (en) * | 2012-01-16 | 2014-11-26 | Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for producing a ceramic layer on a surface formed from an ni base alloy |
| CN102925871A (en) * | 2012-10-25 | 2013-02-13 | 西安交通大学 | Composite thermal barrier coating and preparation method thereof |
| CN108784387A (en) * | 2017-05-02 | 2018-11-13 | 佛山市顺德区美的电热电器制造有限公司 | Cookware and preparation method thereof, cooking apparatus |
| CN109355610A (en) * | 2018-09-30 | 2019-02-19 | 中国科学院宁波材料技术与工程研究所 | A kind of metallic matrix electromagnetic heating coating and its preparation method and application |
Non-Patent Citations (4)
| Title |
|---|
| 国家机械工业委员会: "《中级涂装工艺学》", 31 December 1988, 机械工业出版社 * |
| 理查德•布洛克利等: "《航空航天科技出版工程4》", 30 April 2016, 北京理工大学出版社 * |
| 赵岩等: "等离子喷涂纳米结构YSZ涂层的结构与性能", 《中国表面工程》 * |
| 陈学定等: "《表面涂层技术》", 31 May 1994, 机械工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112301306A (en) * | 2020-09-28 | 2021-02-02 | 华帝股份有限公司 | High-temperature-resistant heat insulation assembly and preparation method thereof |
| CN115142005A (en) * | 2021-04-15 | 2022-10-04 | 浙江福腾宝家居用品有限公司 | Cooking utensil and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105534318A (en) | Long-acting magnetic-conductive and anti-corrosion composite coating for electromagnetic cooker and preparation method of composite coating | |
| CN110117765B (en) | TiO 2 2 Base electrothermal coating and preparation method thereof | |
| CN110983230A (en) | Heat-insulating coating of electromagnetic pot and preparation method thereof | |
| CN105568037B (en) | A kind of chromium plating diamond particles disperse the preparation method of Cu-base composites | |
| WO2010051738A1 (en) | Electromagnetic heating ceramic container | |
| CN103045983A (en) | Preparation method of carbon fiber-based high-temperature heat-insulating material with surface tungsten coating | |
| CN102674903B (en) | Preparation method of SiC/C-AlPO4-mullite antioxidation coating for C/C composite material | |
| CN107090578B (en) | Magnetic conductive coating with compact structure and preparation method thereof | |
| CN100546940C (en) | A kind of method for preparing nitride aluminum/graphite laminated composite ceramic material | |
| CN102497689A (en) | Method for improving antioxidation performance of graphite electrode with surface modification | |
| CN103431746B (en) | Carbon/carbon compound material and metal material composite cooker and production method | |
| CN205493577U (en) | Magnetic conduction pan with end is covered in hot spraying | |
| CN207619506U (en) | A kind of magnetic conduction coating made of plasma spray technology | |
| CN105296918A (en) | Al2O3-SiO2 high-temperature insulating coating on surface of metal tungsten and preparation method thereof | |
| CN105349738A (en) | Corrosion resistance thermal treatment method for steel | |
| Zhang et al. | Laser in situ synthesized TiN/Ti3Al composite coatings | |
| CN103083082B (en) | Medial tool capable of quickly heating | |
| CN201402656Y (en) | Heat resistant electric wire capable of enduring ultrahigh temperature of 1000 DEG C | |
| CN203619302U (en) | Composite cooker made of carbon-carbon composite and metal material | |
| ZHANG et al. | Microstructures and mechanical properties of spray formed H13 tool steel | |
| CN108085673B (en) | Preparation method of cookware with cold spraying magnetic conductive coating | |
| CN106085212B (en) | A kind of insulating coating of electrical water heater electric heating tube | |
| CN101648825A (en) | Metal glaze for high-temperature heat-resistance ceramic cookers on electromagnetic oven | |
| CN201781642U (en) | Electric heating tube on heater | |
| CN101565848B (en) | Method for making gradient silicon carbide coating by electrophoresis codeposition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200410 |
|
| RJ01 | Rejection of invention patent application after publication |