A method for preparing an energy-saving material coating and the coating

Abstract

The present application relates to a kind of energy-saving material coating preparation method and coating, and raw material is made of the following materials: zirconium corundum, titanium powder, mullite powder, copper powder, alumina powder, NiCrAlY powder, the mixed material of silicon carbide powder, it can guarantee its high radiation performance on one hand, increase its heat conduction performance on the other hand.Simultaneously, by calcination process, can fully guarantee its strength etc.Performance.The energy-saving material coating preparation method and coating of the present application can significantly improve its energy-saving performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy-saving materials, in particular to a preparation method of an energy-saving material coating and the coating. BACKGROUND

[0002] In the process of heating by a furnace, such as a boiler or a pot, a large part of the heat is lost, resulting in energy loss.

[0003] To solve the above problems, one of the solutions is infrared radiation heating technology. It can transmit energy through direct radiation, has high heat transfer efficiency, high absorption rate of heating, strong directionality of radiation, and high energy concentration in the heat conduction process, and has high energy-saving effect in the heat conduction process.

[0004] Currently, there is a way to improve the heat utilization efficiency by setting a high-emissivity coating on the outer surface of the furnace. However, the existing way has the problem of reducing other properties, such as thermal conductivity, corrosion resistance, strength, etc., in order to improve the emissivity.

[0005] Therefore, an energy-saving material coating preparation method and coating are needed to solve the above problems. SUMMARY

[0006] To alleviate or solve at least one aspect or at least one point of the above problems, the present application is proposed.

[0007] The present application provides a preparation method of an energy-saving material coating, characterized by comprising:

[0008] Step 1: Preparation of raw materials: the raw materials are composed of the following components: 15-20 parts of zirconia (ZrO2 10%~15%);

[0009] 8-10 parts of titanium powder;

[0010] 6-10 parts of mullite powder;

[0011] 3-4 parts of silicon carbide powder;

[0012] 7-11 parts of copper powder;

[0013] 20-25 parts of aluminum oxide powder;

[0014] 8-12 parts of NiCrAlY powder;

[0015] Mix the above powders and use a ball mill to ball mill, so that the average particle size of the ball-milled particles is below 0.5 mm, to obtain uniformly mixed powder A;

[0016] Step two: put the mixed powder A into a high-temperature sintering furnace for sintering, wherein the sintering temperature is between 800-1500 degrees, and the sintering time is not less than 6 hours, to obtain sintered powder B;

[0017] Step three: use a planetary ball mill to ball mill the sintered powder B, so that the average particle size of the ball-milled particles is below 5 μm, to obtain uniformly mixed powder C;

[0018] Step four: mix the powder C with silica sol at a ratio of 1:2 to 1:3, and add the powder C into the silica sol, to obtain mixture D after thorough mixing;

[0019] Step five: use a high-speed mixer to rapidly mix, dissolve, disperse and refine the mixture D, to obtain mixed suspension E; wherein the rotation speed of the high-speed mixer is not less than 800 r / min, and the stirring time is not less than 3 hours;

[0020] Step six: use a grinder to thoroughly grind the suspension E, so that the average particle size is below 1 μm, to obtain a coating.

[0021] Preferably, the following steps are further included:

[0022] Step seven: first polish the bottom surface of the pot to remove the oxide layer, and then heat treat the pot, so that the temperature of the outer periphery of the pot is not less than 150 °C

[0023] Step eight: use a plasma spraying method to spray the coating on the outer surface of the pot, and the thickness of the coating is between 0.2-0.3 mm; after the spraying is completed, the pot is cooled for more than 10 hours.

[0024] Preferably, the following steps are further included:

[0025] Step nine: put the sprayed pot into a high-temperature baking chamber for high-temperature baking, wherein the baking temperature is higher than 800 °C.

[0026] Preferably, in step one, the raw materials are composed of the following components: zircon corundum 150 parts; titanium powder 8 parts;

[0027] mullite powder 6 parts; silicon carbide powder 3 parts; copper powder 7 parts; alumina powder 20 parts; NiCrAlY powder 8 parts.

[0028] Preferably, in step one, the raw materials are composed of the following components: zircon corundum 18 parts; titanium powder 9 parts; mullite powder 8 parts; silicon carbide powder 4 parts; copper powder 9 parts; alumina powder 22 parts; NiCrAlY powder 10 parts.

[0029] Preferably, in step one, the raw materials are composed of the following components: zircon corundum 20 parts; titanium powder 10 parts;

[0030] Mullite powder 8 parts; silicon carbide powder 4 parts; copper powder 10 parts; alumina powder 25 parts; NiCrAlY powder 10 parts.

[0031] Preferably, in step one: the raw materials are composed of: zirconia corundum 20 parts; titanium powder 10 parts; mullite powder 10 parts; silicon carbide powder 4 parts; copper powder 11 parts; alumina powder 23 parts; NiCrAlY powder 12 parts.

[0032] Preferably, the zirconia corundum is low zirconia corundum, wherein the weight ratio of ZrO2 is 10% to 15%.

[0033] Preferably, the concentration of SiO2 in the silica sol is 12% to 30%.

[0034] In addition, the present application also provides an energy-saving material coating, which is made by any of the above-mentioned methods.

[0035] The present application improves the infrared radiation performance by using a mixed material composed of zirconia corundum, titanium powder, mullite powder, copper powder, alumina powder, NiCrAlY powder, and silicon carbide powder. The content of alumina is increased, which ensures its high radiation performance and increases its thermal conductivity. The addition of copper powder and Cr powder increases its thermal conductivity and other properties such as corrosion resistance. The addition of mullite powder and silicon carbide powder increases its strength.

[0036] The present application uses NiCrAlY dispersedly distributed in the coating, which is beneficial to improving the thermal shock resistance of the coating due to its large expansion coefficient, and improves the thermal conductivity of the coating. NiCrAlY can consume the penetration of oxygen, and improve the high-temperature oxidation resistance of the coating. Alumina and NiCrAlY together form a thermal expansion gradient, which improves the high-temperature stability of the coating.

[0037] Therefore, the present application uses the synergistic effect of the above components to make the composite coating have high-temperature resistance, high-temperature oxidation resistance, corrosion resistance, and high heat exchange performance.

[0038] The present application calcines in a high-temperature sintering furnace, controls the sintering temperature between 800 and 1500 degrees, and prevents the easy cracking phenomenon caused by oxidation in the later stage. Then, the components are mixed uniformly through ball milling, stirring, and grinding by a grinder, etc. Plasma spraying is used to further ensure the uniformity of the coating.

[0039] In the process of spraying, the present application uses preheating and post-high-temperature baking to further ensure the full fusion of the components, improve the density, and enhance the strength. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 It is a perspective view of a pot without a coating according to the comparative example of the present application.

[0041] Figure 2 A perspective view of a non-coated pan according to an embodiment of the present application.

[0042] Figure 3 A perspective view of a non-coated pan according to an embodiment of the present application.

[0043] Figure 4 A perspective view of a non-coated pan according to an embodiment of the present application.

[0044] Figure 5 A perspective view of a non-coated pan according to an embodiment of the present application. DETAILED DESCRIPTION

[0045] The following description of the embodiments of the present application with reference to the accompanying drawings is provided to assist in a comprehensive understanding of the present application, and is not intended to be construed as a limitation of the present application. In the present application, the same reference numbers are used throughout the drawings to refer to the same or like parts.

[0046] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, these described examples have been provided as an exemplification of the implementations described herein and are not intended to limit the scope of the disclosure. Many other examples could be provided using similar techniques without departing from the disclosure.

[0047] Although terms such as "first", "second", and "third" can be used herein to describe various components, assemblies, regions, layers or sections, these components, assemblies, regions, layers or sections should not be limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer or section from another component, assembly, region, layer or section.

[0048] In the specification, when an element (such as a layer, a region, or a substrate) is referred to as being "on" another element, "connected to" or "coupled to" another element, it can be directly on, directly connected to, or directly coupled to the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being "directly on", "directly connected to", or "directly coupled to" another element, there are no other elements interposed therebetween.

[0049] The terms used herein are merely used to describe various examples and should not be construed to limit the disclosure. Singular forms are intended to include plural forms unless the context clearly indicates otherwise. The terms "comprises" and "includes" specify the presence of stated features, numbers, operations, components, elements, and / or a combination thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, components, elements, and / or a combination thereof.

[0050] In order to enable those skilled in the art to use the content of the present application, the following exemplary embodiments will be given below in connection with specific application scenarios, parameters of specific systems, devices and elements, and specific connection modes. However, for those skilled in the art, these embodiments are only examples, and the general principles defined herein can be applied to other embodiments and application scenarios without departing from the spirit and scope of the present application.

[0051] Embodiment 1

[0052] A method for preparing an energy-saving material coating, comprising:

[0053] Step one: preparation of raw materials: the raw materials are composed of the following components: zircon corundum 150 parts; titanium powder 8 parts;

[0054] mullite powder 6 parts; silicon carbide powder 3 parts; copper powder 7 parts; alumina powder 20 parts; NiCrAlY powder 8 parts;

[0055] Among them, the zircon corundum is low zircon corundum, wherein the weight ratio of ZrO2 is 10% to 15%, and the ratio in this example is 12%;

[0056] Mix the above powders and use a ball mill to ball mill, so that the average particle size of the ball-milled particles is 0.3 mm, to obtain uniformly mixed powder A;

[0057] Step two: put the mixed powder A above into a high-temperature sintering furnace for sufficient sintering, wherein the sintering temperature is 1000 degrees and the sintering time is 7 hours, to obtain sintered powder B;

[0058] Third step, use a planetary ball mill to ball mill the sintered powder B above, so that the average particle size of the ball-milled particles is 5 μm, to obtain uniformly mixed powder C;

[0059] Fourth step: mix powder C with silica sol in a ratio of 1:2, add powder C to the silica sol, and mix thoroughly to obtain mixture D;

[0060] Fifth step: mix mixture D in a high-speed mixer for rapid mixing, dissolution, dispersion, and refinement, to obtain mixed suspension E; wherein the speed of the high-speed mixer is 800 r / min, and the stirring time is 3 hours;

[0061] Sixth step: use a grinder to grind the suspension E thoroughly, so that the average particle size is 1 μm, to obtain the coating.

[0062] Seventh step: first, polish the bottom surface of the pot to remove the oxide layer; and heat treat it so that the temperature of the outer periphery of the pot is 180°C

[0063] Step 8: The coating is sprayed on the outer surface of the pot by plasma spraying, with a thickness of 0.2mm. After spraying, the pot is cooled for 10 hours.

[0064] Step 9: The sprayed pot is placed in a high-temperature baking chamber for high-temperature baking, with a baking temperature higher than 800℃.

[0065] Step 10: Natural cooling in air for 12 hours.

[0066] Example 2

[0067] A method for preparing an energy-saving material coating, comprising the following steps: Step 1: Preparation of raw materials: 18 parts of zirconia corundum, 9 parts of titanium powder, 8 parts of mullite powder, 4 parts of silicon carbide powder, 9 parts of copper powder, 22 parts of alumina powder, and 10 parts of NiCrAlY powder.

[0068] The zirconia corundum is low-zirconia corundum, with a ZrO2 content of 13% by weight.

[0069] The above powders are mixed and ball-milled to obtain a uniformly mixed powder A with an average particle size of 0.3mm.

[0070] Step 2: The mixed powder A is placed in a high-temperature sintering furnace for full sintering, with a sintering temperature of 1000 degrees and a sintering time of 7 hours, to obtain a sintered powder B.

[0071] Step 3: The sintered powder B is ball-milled using a planetary ball mill to obtain a uniformly mixed powder C with an average particle size of 5μm.

[0072] Step 4: The powder C is mixed with silica sol at a ratio of 1:2, and the powder C is added to the silica sol. After thorough mixing, a mixture D is obtained.

[0073] Step 5: The mixture D is rapidly mixed, dissolved, dispersed, and refined in a high-speed mixer to obtain a mixed suspension E. The speed of the high-speed mixer is 800r / min, and the stirring time is 3 hours.

[0074] Step 6: The suspension E is fully ground using a grinder to obtain a coating with an average particle size of 1μm.

[0075] Step 7: The bottom surface of the pot is polished to remove the oxide layer, and the pot is heated to a temperature of 180℃ at the outer periphery.

[0076] Step 8: The coating is sprayed on the outer surface of the pot by plasma spraying, with a thickness of 0.2mm. After spraying, the pot is cooled for 10 hours.

[0077] Step 9: Put the sprayed pot into a high-temperature baking chamber for high-temperature baking, wherein the baking temperature is higher than 800℃.

[0078] Step 10: Naturally cool in air for 12 hours.

[0079] Example 3

[0080] A method for preparing an energy-saving material coating, comprising the following steps: Step 1: preparing raw materials: 20 parts of zirconia corundum, 10 parts of titanium powder,

[0081] 8 parts of mullite powder, 4 parts of silicon carbide powder, 10 parts of copper powder, 25 parts of alumina powder, and 10 parts of NiCrAlY powder;

[0082] The zirconia corundum is low-zirconia corundum, wherein the weight ratio of ZrO2 is 15%.

[0083] The above powders are mixed and ball-milled to obtain uniformly mixed powder A with an average particle size of 0.3 mm.

[0084] Step 2: Put the mixed powder A into a high-temperature sintering furnace for sufficient sintering, wherein the sintering temperature is 1000 degrees and the sintering time is 7 hours, to obtain sintered powder B.

[0085] Step 3: Ball-mill the sintered powder B using a planetary ball mill to obtain uniformly mixed powder C with an average particle size of 5μm.

[0086] Step 4: Mix the powder C with the silica sol at a ratio of 1:2, and add the powder C into the silica sol, and mix thoroughly to obtain mixture D.

[0087] Step 5: Rapidly mix, dissolve, disperse and refine the mixture D in a high-speed mixer to obtain mixed suspension E, wherein the rotation speed of the high-speed mixer is 800r / min and the stirring time is 3 hours.

[0088] Step 6: Grind the suspension E using a grinder to obtain a coating with an average particle size of 1μm.

[0089] Step 7: First, polish the bottom surface of the pot to remove the oxide layer, and then heat treat the pot to make the temperature of the outer periphery of the pot 180℃.

[0090] Step 8: Spray the coating on the outer surface of the pot by plasma spraying, and the thickness of the coating is between 0.2mm. After spraying, cool the pot for 10 hours.

[0091] Step 9: Put the sprayed pot into a high-temperature baking chamber for high-temperature baking, wherein the baking temperature is higher than 800℃.

[0092] The tenth step is natural cooling in air, and the cooling time is 12 hours.

[0093] Example 4

[0094] A method for preparing an energy-saving material coating includes the following steps: Step 1: preparation of raw materials: 20 parts of zirconia corundum, 10 parts of titanium powder, 10 parts of mullite powder, 4 parts of silicon carbide powder, 11 parts of copper powder, 23 parts of alumina powder, and 12 parts of NiCrAlY powder;

[0095] The zirconia corundum is low-zirconia corundum, in which the weight ratio of ZrO2 is 10%.

[0096] The above powders are mixed and ball-milled to obtain a mixed powder A with an average particle size of 0.3 mm.

[0097] Step 2: The mixed powder A is put into a high-temperature sintering furnace for full sintering, the sintering temperature is 1000 degrees, and the sintering time is 7 hours, to obtain a sintered powder B.

[0098] Step 3: The sintered powder B is ball-milled by a planetary ball mill to obtain a mixed powder C with an average particle size of 5 μm.

[0099] Step 4: The powder C is mixed with silica sol at a ratio of 1:2, and the powder C is added to the silica sol, and the mixture D is obtained after full mixing.

[0100] Step 5: The mixture D is rapidly mixed, dissolved, dispersed, and refined in a high-speed stirrer to obtain a mixed suspension E, wherein the rotation speed of the high-speed stirrer is 800 r / min, and the stirring time is 3 hours.

[0101] Step 6: The suspension E is fully ground by a grinder to obtain a coating with an average particle size of 1 μm.

[0102] Step 7: The bottom surface of the pot is polished to remove the oxide layer, and the pot is heated to a temperature of 180℃ at the outer periphery.

[0103] Step 8: The coating is sprayed on the outer surface of the pot by plasma spraying, and the thickness is 0.3 mm. After the spraying is completed, the pot is cooled for 10 hours.

[0104] Step 9: The sprayed pot is put into a high-temperature baking chamber for high-temperature baking, and the baking temperature is higher than 800℃.

[0105] Step 10: Natural cooling in air, and the cooling time is 12 hours.

[0106] Energy-saving effect test:

[0107] Method: Using the same batch of original pots, 5 pieces in total, prepare one original pot, and use the pots coated with the coatings of Examples 1-4, use the same gas stove, use the same knob fire, use the same to boil 500 ml of water, record the time when the water is boiled, and then convert the energy saving efficiency.

[0108] Results see Table 1

[0109]

[0110]

[0111] Strength effect test:

[0112] Method: The above uncoated pots and the coated pots made in Examples 1-4 were tested for strength, and the same degree of manual knife was used for scratch test. Results see Table 2.

[0113] Scratch results No coating pan With obvious scratch Example 1 coated pan No obvious scratch Example 2 coated pan No obvious scratch Example 3 coated pan No obvious scratch Example 4 coated pan No obvious scratch

[0114] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, combinations, sub-combinations and alterations can occur to one skilled in the art without departing from the principles and spirit of the present application, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A method for preparing an energy-saving material coating, characterized in that: Includes the following steps: Step 1: Preparation of raw materials: The raw materials consist of the following components: 15-20 parts of zirconium corundum, wherein the zirconium corundum is low-zirconium corundum, and the weight ratio of ZrO2 is 10%~15%; 8-10 parts titanium powder; 6-10 parts mullite powder; 3-4 parts of silicon carbide powder; 7-11 parts copper powder; 20-25 parts of alumina powder; 8-12 parts of NiCrAlY powder; The above powders are mixed and ball-milled to obtain a uniformly mixed powder A with an average particle size of less than 0.5 mm. Step 2: Place the above-mixed powder A into a high-temperature sintering furnace for full sintering, wherein the sintering temperature is between 800-1500 degrees and the sintering time is not less than 6 hours, to obtain sintered powder B; The third step is to ball mill the sintered powder B using a planetary ball mill, so that the average particle size of the milled particles is less than 5 mm, to obtain a uniformly mixed powder C; Step 4: Mix powder C and silica sol in a ratio between 1:2 and 1:

3. Add powder C to the silica sol and mix thoroughly to obtain mixture D. Step 5: Mixture D is rapidly mixed, dissolved, dispersed, and refined in a high-speed mixer to obtain a mixed suspension E; wherein the speed of the high-speed mixer is not less than 800 r / min, and the mixing time is not less than 3 hours. Step 6: Grind the suspension E thoroughly using a grinder to make its average particle size less than 1 mm, and obtain the coating. Step 7: First, grind the bottom of the pot to remove the oxide layer; then heat it to ensure that the temperature of the outer circumference of the pot is not lower than 150℃. Step 8: Apply the coating to the outer surface of the pot using plasma spraying, with a thickness between 0.2-0.3 mm. After spraying, allow it to cool for at least 10 hours. Step 9: Place the coated pan into a high-temperature baking chamber for high-temperature baking, where the baking temperature exceeds 800℃; Step 10: Allow to cool naturally in the air for 12 hours.

2. The preparation method according to claim 1, characterized in that: In step one: the raw materials consist of the following components: 150 parts zirconium corundum; 8 parts titanium powder; 6 parts mullite powder; 3 parts silicon carbide powder; 7 parts copper powder; 20 parts alumina powder; 8 parts NiCrAlY powder.

3. The preparation method according to claim 1, characterized in that: In step one: the raw materials consist of the following components: 18 parts zirconium corundum; 9 parts titanium powder; 8 parts mullite powder; 4 parts silicon carbide powder; 9 parts copper powder; 22 parts alumina powder; and 10 parts NiCrAlY powder.

4. The preparation method according to claim 1, characterized in that: In step one: the raw materials consist of the following components: 20 parts zirconium corundum; 10 parts titanium powder; 8 parts mullite powder; 4 parts silicon carbide powder; 10 parts copper powder; 25 parts alumina powder; 10 parts NiCrAlY powder.

5. The preparation method according to claim 1, characterized in that: In step one: the raw materials consist of the following components: 20 parts zirconium corundum; 10 parts titanium powder; 10 parts mullite powder; 4 parts silicon carbide powder; 11 parts copper powder; 23 parts alumina powder; and 12 parts NiCrAlY powder.

6. An energy-saving material coating, characterized in that: The coating is made using the method described in any one of claims 1-5.

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