WO2018157445A1 - 烤架及其喷涂方法及微波炉 - Google Patents

烤架及其喷涂方法及微波炉 Download PDF

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Publication number
WO2018157445A1
WO2018157445A1 PCT/CN2017/079951 CN2017079951W WO2018157445A1 WO 2018157445 A1 WO2018157445 A1 WO 2018157445A1 CN 2017079951 W CN2017079951 W CN 2017079951W WO 2018157445 A1 WO2018157445 A1 WO 2018157445A1
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WIPO (PCT)
Prior art keywords
coating
grill
layer
agent
silica sol
Prior art date
Application number
PCT/CN2017/079951
Other languages
English (en)
French (fr)
Inventor
韩大成
安明波
张明
凌奇宏
Original Assignee
广东美的厨房电器制造有限公司
美的集团股份有限公司
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Application filed by 广东美的厨房电器制造有限公司, 美的集团股份有限公司 filed Critical 广东美的厨房电器制造有限公司
Publication of WO2018157445A1 publication Critical patent/WO2018157445A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/16—Shelves, racks or trays inside ovens; Supports therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/542—No clear coat specified the two layers being cured or baked together
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves

Definitions

  • the invention relates to the field of household appliances, in particular to a grill and a spraying method thereof and a microwave oven.
  • the grilling effect of the microwave oven is poor, and it is easy to overheat and cause the food on the grill to catch fire, which causes the food to be coked.
  • the above situation may also cause safety hazards in the microwave oven.
  • the present invention aims to at least solve one of the technical problems existing in the related art. To this end, the present invention needs to provide a grill and a spraying method therefor and a microwave oven.
  • a grill according to an embodiment of the present invention is for use in a microwave oven, the grill comprising a body and a coating covering the body, the coating comprising a plurality of silica particles of a nanometer scale.
  • the coating covers the body and the coating comprises a plurality of nano-scale silica particles, the heat transfer rate of the grill can be effectively reduced, thereby making the grill better. Insulation effect, which can effectively avoid the coking of food on the grill due to overheating.
  • the coating comprises nanoscale semiconductor oxide particles.
  • the coating includes a first coating and a second coating, the first coating and the second coating sequentially coating the body, the first coating separating the a second coating layer and the body, the plurality of silica particles comprising first silica particles and second silica particles, the first coating layer comprising the first silica particles,
  • the second coating layer includes the second silica particles.
  • the thickness of the first coating ranges from 20 ⁇ m to 25 ⁇ m
  • the thickness of the second coating layer ranges from 8 ⁇ m to 10 ⁇ m.
  • the first coating layer is formed by spraying a first coating reagent on an outer surface of the body, the first coating reagent comprising a first silica sol, a first silane, and a first auxiliary agent
  • the second coating is coated by the second coating a reagent sprayed on the outer surface of the first coating, the second coating reagent comprising a second silica sol, a second silane and a second auxiliary, the first silica sol comprising the first two Silica particles, the second silica sol comprises the second silica particles, the first auxiliary agent and the second auxiliary agent are prepared by a leveling agent, an antifoaming agent, a bactericide, a thickener, and a dispersion One or more of a dose, a pH adjuster, a matting agent, and a dispersing agent.
  • the first silica sol accounts for 30% to 50% by mass of the first coating reagent, and the first silane accounts for 20% by mass of the first coating reagent. % ⁇ 50%, the first auxiliary agent accounts for 0%-40% of the mass percentage of the first coating reagent, and the total mass of the first silica sol and the first silane accounts for the first The mass percentage of the coating reagent is greater than or equal to 60%.
  • the first silica sol accounts for 33% by mass of the first coating reagent, and the first silane accounts for 27% by mass of the first coating reagent.
  • the agent accounts for 40% by mass of the first coating agent.
  • the second silica sol accounts for 40% to 55% by mass of the second coating reagent, and the second silane accounts for 35% by mass of the second coating reagent. % ⁇ 45%, the second auxiliary agent accounts for 0%-20% of the mass percentage of the second coating reagent, and the total mass of the second silica sol and the second silane accounts for the second The mass percentage of the coating reagent is greater than or equal to 80%.
  • the second silica sol accounts for 49.5% by mass of the second coating reagent, and the second silane accounts for 40.5% by mass of the second coating reagent.
  • the agent accounts for 10% by mass of the second coating agent.
  • the plurality of silica particles are formed with at least one layer of silicon dioxide on the nanometer scale.
  • the coating includes a first coating and a second coating, the first coating and the second coating sequentially coating the body, the first coating separating the The second coating layer and the body, the at least one silicon dioxide layer includes a first silicon dioxide layer and a second silicon dioxide layer, and the first coating layer includes the first silicon dioxide layer, The second coating layer includes the second silicon dioxide layer.
  • the body includes a closed frame and a mesh layer
  • the frame surrounds the mesh layer
  • the frame is fixedly connected to the mesh layer
  • the mesh layer includes a plurality of a first support strip and a plurality of second support strips intersecting the plurality of first support strips, the plurality of first support strips are spaced apart along a length direction of the frame body, the plurality of second support strips The strips are spaced apart along the width direction of the frame, the spacing between two adjacent first support strips is greater than or equal to 40 mm, and the spacing between two adjacent second support strips is greater than or equal to 40mm.
  • the spacing between two adjacent first support strips is equal to 65 mm and the spacing between adjacent two of the second support strips is equal to 100 mm.
  • Step 1 mixing the first silica sol and the first silane and performing rolling curing, and rolling the first auxiliary agent And then mixing the first silica sol and the first silane after rolling and aging and stirring to form a first coating reagent, the first silica sol comprising a first nanometer Silica particles;
  • Step two mixing the second silica sol and the second silane and performing rolling aging, and rolling and aging the second auxiliary agent, and then rolling the matured second silica sol and the second silane with the first Mixing and stirring to form a second coating agent, the second silica sol comprising nano-sized second silica particles;
  • Step 3 sandblasting the body of the grill, and cleaning the body of the grill after sandblasting
  • Step 4 preheating the body of the grill processed through the third step, and spraying the first coating reagent on the surface of the body of the grill to form a completely covering the grill. a first precoat of the body, and then pre-drying the first precoat layer;
  • Step 5 when the temperature of the body of the grill after being processed through the step 4 is greater than or equal to the temperature when the body of the grill is preheated in the step 4, the second Coating a reagent onto the surface of the first precoat to form a second precoat completely covering the first precoat, and then pre-drying the second precoat;
  • Step 6 sintering the first precoat layer and the second precoat layer to form a first coating layer and a second coating layer, respectively.
  • the coating covers the body, and the coating layer includes a plurality of nano-sized silica particles, the heat transfer rate of the grill can be effectively reduced, so that the grill has Better insulation effect, which can effectively avoid the coking of food on the grill due to overheating.
  • the sintering temperature of sintering the first pre-coat layer and the second pre-coat layer ranges from 270 ° C to 300 ° C.
  • the sintering temperature is 280 ° C, and the time for the constant sintering at the sintering temperature ranges from 10 min to 20 min.
  • a microwave oven according to an embodiment of the present invention includes the grill described in any of the above embodiments.
  • the coating covers the body, and the coating layer includes a plurality of nano-sized silica particles, the heat transfer rate of the grill can be effectively reduced, so that the grill has better separation.
  • the heat effect can effectively avoid the coking of the food on the grill due to overheating.
  • FIG. 1 is a schematic plan view of a grill according to an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view of a body and a coating of a grill according to an embodiment of the present invention.
  • FIG 3 is another schematic cross-sectional view of the body and coating of the grill of the embodiment of the present invention.
  • FIG. 4 is a schematic view showing a temperature change curve of a coating of a grill according to an embodiment of the present invention.
  • Body 11 frame 111, mesh layer 112, first support strip 113, second support strip 114, body 11a, coating 12, coating 12a, first coating 121, second coating 122, silicon dioxide
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include one or more of the described features either explicitly or implicitly.
  • the meaning of "a plurality” is two or more unless specifically and specifically defined otherwise.
  • connection In the description of the present invention, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or connected in one piece. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, which can be the internal communication of two elements or the interaction of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • the grill 10 of the embodiment of the present invention is used in a microwave oven.
  • the grill 10 includes a body 11 and a coating 12 covering the body 11.
  • the coating 12 includes a plurality of silica particles of a nanometer scale (not shown).
  • the coating 12 covers the body 11, and the coating 12 includes a plurality of The nano-scale silica particles can effectively reduce the heat transfer rate of the grill 10, so that the grill 10 has better heat insulation effect, thereby effectively preventing the food on the grill 10 from being coked due to overheating.
  • the coating 12 may not completely enclose the body 11 or may completely enclose the body 11.
  • the body 11 is substantially rectangular in shape, and the coating 12 may not be sprayed at the four corners of the body 11, which does not affect the normal use of the grill 10.
  • the body 11 can be constructed of a metallic material and the coating 12 is a completely wrapped body 11.
  • the coating 12 can completely avoid direct contact between the oil, water and the like and the body 11, and completely wrap the coating of the body 11 to effectively avoid overheating of the body 11, and can avoid the microwave of the body 11 and the inner wall of the heating chamber of the microwave oven. Fire phenomenon.
  • the size of the nano-sized silica particles ranges from 1 nm to 100 nm.
  • the nano-sized silica particles can also improve the anti-aging property and strength of the coating 12, and can reduce the surface roughness of the coating 12, so that substances such as oil or water are not easily adhered to the coating 12, thereby improving baking.
  • the size of the silica particles is 20 nm, 30 nm, 40 nm, 60 nm, 70 nm, or 90 nm.
  • the size of the silica particles is not limited to the values listed in the above examples.
  • the coating 12 comprises nanoscale semiconductor oxide particles.
  • the nano-sized semiconductor oxide particles can further improve the electrostatic shielding performance of the coating layer 12, thereby preventing the grill 10 from being ignited by static electricity.
  • the semiconductor oxide particles include titanium oxide, chromium oxide, zinc oxide, and the like. It should be noted that the semiconductor oxide particles are not limited to the oxides listed in the above examples. The semiconductor oxide particles and the silica particles can be mixed in proportion as needed.
  • the coating 12 includes a first coating 121 and a second coating 122.
  • the first coating layer 121 and the second coating layer 122 sequentially cover the body 11.
  • the first coating 121 separates the second coating 122 from the body 11.
  • the plurality of silica particles include first silica particles (not shown) and second silica particles (not shown).
  • the first coating layer 121 includes first silica particles.
  • the second coating 122 includes second silica particles.
  • the manner in which the plurality of coatings sequentially cover the body 11 can further improve the strength and stability of the coating 12, thereby enhancing the protection effect on the body 11, thereby extending the service life of the grill 10.
  • the first coating layer 121 comprises a plurality of first silica particles.
  • the second coating 122 includes a plurality of second silica particles.
  • the size of the first silica particles ranges from 1 nm to 100 nm.
  • the second silica particles have a size ranging from 1 nm to 100 nm.
  • the size of the first silica particles may be the same as the size of the second silica particles, or may be different from the size of the second silica particles, and may be selected according to practical applications.
  • the thickness of the first coating layer 121 ranges from 20 ⁇ m to 25 ⁇ m.
  • the thickness of the second coating layer 122 ranges from 8 ⁇ m to 10 ⁇ m.
  • the first coating layer 121 can serve as an undercoat layer of the coating layer 12.
  • the thicker first coating layer 121 can ensure strong adhesion between the coating layer 12 and the body 11, and facilitate the second coating layer 122.
  • the surface roughness of the coating 12 is further reduced.
  • the first coating layer 121 has a thickness of 20 ⁇ m, 21 ⁇ m, 22 ⁇ m, 23 ⁇ m, 24 ⁇ m, or 25 ⁇ m.
  • the thickness of the second coating layer 122 is 8 ⁇ m, 9 ⁇ m or 10 ⁇ m. It should be noted that the thicknesses of the first coating layer 121 and the second coating layer 122 are not limited to the values listed in the above examples.
  • the first coating layer 121 is formed by spraying a first coating agent onto the outer surface of the body 11.
  • the first coating reagent includes a first silica sol, a first silane, and a first auxiliary.
  • the second coating layer 122 is formed by spraying a second coating agent onto the outer surface of the first coating layer 121.
  • the second coating reagent includes a second silica sol, a second silane, and a second auxiliary.
  • the first silica sol includes first silica particles.
  • the second silica sol includes second silica particles.
  • the first auxiliary agent and the second auxiliary agent are composed of one or more of a leveling agent, an antifoaming agent, a bactericide, a thickener, a dispersing agent, a pH adjusting agent, a matting agent, and a dispersing agent.
  • the first coating layer 121 formed of the first coating agent has better adhesion, has better wear resistance and heat resistance, and has a lower heat transfer rate.
  • the second coating layer 122 formed of the second coating agent has better adhesion and has better wear resistance and heat resistance while having a lower heat transfer rate.
  • the composition of the first coating reagent is close to the composition of the second coating reagent, which reduces the difficulty of wrapping the first coating layer 121 on the second coating layer 122, further ensuring that the second coating layer 122 wraps the first coating layer 121. Adhesion.
  • the first silica particles are uniformly dispersed in the sol.
  • the second silica sol the second silica particles are uniformly dispersed in the sol.
  • first silane may be the same as the second silane or may be different from the second silane. Specific can be selected according to the actual application.
  • first silane and the second silane may both be organosilanes.
  • the first coating reagent further comprises a first toner.
  • the second coating reagent further includes a second toner.
  • the toner can change the color of the coating 12 and improve the aesthetics of the grill 10.
  • the first toner and the second toner may be inorganic pigments or organic pigments.
  • the first silica sol comprises from 30% to 50% by mass of the first coating agent.
  • the first silane accounts for 20% to 50% by mass of the first coating agent.
  • the first auxiliary agent accounts for 0% to 40% by mass of the first coating agent.
  • the sum of the masses of the first silica sol and the first silane accounts for greater than or equal to 60% by mass of the first coating agent.
  • the stability of the first coating reagent is better, the first silica particles can be stably and uniformly dispersed in the first coating reagent, and the first coating layer 121 formed by spraying the first coating reagent has better. Wear and thermal insulation properties.
  • the first adjuvant does not affect the stability of the first silica particles and the first silane dispersed in the first coating agent.
  • the first silica sol comprises 33% by mass of the first coating agent.
  • the first silane accounted for 27% by mass of the first coating reagent.
  • the first additive accounts for 40% by mass of the first coating agent.
  • the ratio of the first silica sol is moderate, the stability of the first coating reagent is better, and the first silica particles can be stably and uniformly dispersed in the first coating reagent, that is, before the first coating reagent is sprayed, A silica particle does not easily aggregate, which ensures the abrasion and thermal insulation properties of the first coating layer 121 formed by spraying the first coating agent.
  • the first silica sol may also have a mass percentage of the first coating agent of 30%, 31%, 32% or 35%, and the like.
  • the first silane accounts for 25%, 26%, 28% or 29% by mass of the first coating agent.
  • the first auxiliary agent accounts for 35%, 36%, 37% or 38% by mass of the first coating agent.
  • the second silica sol comprises from 40% to 55% by mass of the second coating agent.
  • the second silane accounts for 35% to 45% by mass of the second coating agent.
  • the second auxiliary agent accounts for 0% to 20% by mass of the second coating agent.
  • the sum of the masses of the second silica sol and the second silane accounts for greater than or equal to 80% by mass of the second coating agent.
  • the stability of the second coating reagent is better, the second silica particles can be stably and uniformly dispersed in the second coating reagent, and the second coating layer 122 formed by spraying the second coating reagent is better. Wear and thermal insulation properties.
  • the sum of the mass of the second silica sol and the second silane accounts for 80% or more of the mass percentage of the second coating agent, the density of the second coating layer 122 is ensured, and the second auxiliary agent is not affected.
  • the stability of the second silica particles and the second silane dispersed in the second coating reagent since the sum of the mass of the second silica sol and the second silane accounts for 80% or more of the mass percentage of the second coating agent, the density of the second coating layer 122 is ensured, and the second auxiliary agent is not affected. The stability of the second silica particles and the second silane dispersed in the second coating reagent.
  • the second silica sol comprises 49.5% by mass of the second coating agent.
  • the second silane accounts for 40.5% by mass of the second coating agent.
  • the second additive accounts for 10% by mass of the second coating agent.
  • the stability of the second coating reagent is better, and the second silica particles can be stably and uniformly dispersed in the second coating reagent, that is, the second silica particles are not easily aggregated before the second coating reagent is sprayed. This ensures the wear and thermal insulation properties of the second coating layer 122 formed by spraying the second coating agent.
  • the second silica sol accounts for a relatively large mass percentage of the second coating agent, which increases the density of the second coating layer 122, thereby further reducing the surface roughness of the coating layer 12.
  • the second silica sol may also have a mass percentage of the second coating agent of 40%, 42%, 46%, or 51%, and the like.
  • the second silane accounts for 36%, 38%, 40% or 42% by mass of the second coating agent.
  • the second auxiliary agent accounts for 6%, 8%, 9% or 12% by mass of the second coating agent.
  • a plurality of silicon dioxide particles form at least one silicon dioxide layer 123a on the nanometer scale.
  • the nano-sized silicon dioxide layer 123a has better thermal resistance properties, can further reduce the heat transfer efficiency of the coating 12a, and can improve the wear resistance and heat resistance of the coating 12a.
  • the thickness of the nano-sized silicon dioxide layer 123a ranges from 1 nm to 100 nm. In some examples, the thickness of the silicon dioxide layer 123a is 20 nm, 30 nm, 40 nm, 60 nm, 70 nm, or 90 nm. The thickness of the silicon dioxide layer 123a is not limited to the values listed in the above examples.
  • the coating 12a includes a first coating 121a and a second coating 122a.
  • the first coating layer 121a and the second coating layer 122a sequentially cover the body 11a.
  • the first coating layer 121a separates the second coating layer 122a from the body 11a.
  • the at least one silicon dioxide layer 123a includes a first silicon dioxide layer 1231a and a second silicon dioxide layer 1232a.
  • the first coating layer 121a includes a first silicon dioxide layer 1231a.
  • the second coating layer 122a includes a second silicon dioxide layer 1232a.
  • the manner in which the plurality of coating layers are sequentially covered by the body 11a can further improve the strength and stability of the coating layer 12a, thereby enhancing the protection effect on the body 11a.
  • the plurality of silica nanolayers further enhance the hardness and thermal insulation properties of the coating 12a.
  • the thickness of the first silicon dioxide layer 1231a ranges from 1 nm to 100 nm.
  • the thickness of the second silicon dioxide layer 1232a ranges from 1 nm to 100 nm.
  • the thickness of the first silicon dioxide layer 1231a may be the same as the thickness of the second silicon dioxide layer 1232a, or may be different from the thickness of the second silicon dioxide layer 1232a, and may be selected according to practical applications.
  • the body 11 includes a closed frame 111 and a mesh layer 112.
  • the frame 111 surrounds the mesh layer 112.
  • the frame 111 is fixedly connected to the mesh layer 112.
  • the mesh layer 112 includes a plurality of first support strips 113 and a plurality of second support strips 114 that intersect the plurality of first support strips 113.
  • the plurality of first support bars 113 are spaced apart along the length direction of the frame body 111 (as shown by the Y-axis direction in FIG. 1).
  • the plurality of second support bars 114 are spaced apart along the width direction of the frame 111 (as shown by the X-axis direction in FIG. 1).
  • the spacing d1 between the adjacent two first support bars 113 is greater than or equal to 40 mm.
  • the spacing d2 between the adjacent two second support bars 114 is greater than or equal to 40 mm.
  • the distribution of the plurality of first support strips 113 and the plurality of second support strips 114 of the mesh layer 112 is relatively regular, and the spacing between the adjacent two support strips is greater than or equal to 40 mm, the adjacent There is a sufficient spacing between the two support strips, and the openings formed by the intersection of the plurality of first support strips 113 and the plurality of second support strips 114 are relatively regular, thereby effectively reducing the probability of microwave accumulation on the mesh layer 112, and
  • the microwave oven having the grill 10 can be made less prone to self-ignition and food fire.
  • the body as the frame body 111 is made of a metal material
  • the body as the first support strip 113 and the second support strip 114 is made of a metal material such as iron.
  • the spacing d1 between two adjacent first support bars 113 is equal to 65 mm.
  • the spacing d2 between the adjacent two second support bars 114 is equal to 100 mm.
  • the spacing between the adjacent two first support bars 113 is moderate, and the adjacent two second support bars 114 are The spacing between the two is moderate, so that the grill 10 has a larger actual bearing area and can effectively reduce the probability of microwave accumulation on the mesh layer 112.
  • the joint where the first support strip 113 and the second support strip 114 intersect is also protected by the coating 12, such that the first support strip 113 and the second support strip The intersection of the 114 intersections is not prone to microwave ignition.
  • Step 1 mixing the first silica sol and the first silane and performing rolling and aging, and rolling and curing the first auxiliary agent, and then mixing the first silica sol and the first silane after rolling and aging with the first auxiliary agent Stirring to form a first coating reagent, the first silica sol comprising nanoscale first silica particles;
  • Step 2 mixing the second silica sol and the second silane and performing rolling and aging, and rolling and aging the second auxiliary agent, and then mixing and sintering the second silica sol and the second silane after the rolling and aging Stirring to form a second coating agent, the second silica sol comprising nano-sized second silica particles;
  • Step 3 sandblasting the body 11 of the grill 10 and cleaning the body 11 of the grill 10 after sandblasting;
  • Step 4 preheating the body 11 of the grill 10 after the third step, and spraying the first coating reagent on the surface of the body 11 of the grill 10 to form a first precoat covering the body 11, and then Pre-drying the first precoat layer;
  • Step 5 spraying the second coating reagent on the first time after the temperature of the body 11 of the grill 10 processed through the step 4 is greater than or equal to the temperature at which the body 11 of the grill 10 is preheated in the fourth step. Forming a surface of the precoat layer to form a second precoat layer covering the first precoat layer, and then pre-drying the second precoat layer;
  • Step 6 sintering the first pre-coat layer and the second pre-coat layer to form a first coating layer and a second coating layer, respectively.
  • the coating 12 covers the body 11, and the coating 12 includes a plurality of nano-sized silica particles, the heat transfer rate of the grill 10 can be effectively reduced. Therefore, the grill 10 has a better heat insulating effect, so that the food on the grill 10 can be effectively prevented from being coked due to overheating.
  • the coating 12 may not completely enclose the body 11 or may completely enclose the body 11.
  • the body 11 is substantially rectangular in shape, and the coating 12 may not be sprayed at the four corners of the body 11, which does not affect the normal use of the grill 10.
  • the body 11 can be constructed of a metallic material and the coating 12 is a completely wrapped body 11.
  • the coating 12 can completely avoid direct contact between the oil, water and the like and the body 11, and completely wrap the coating of the body 11 to effectively avoid overheating of the body 11, and can avoid the microwave of the body 11 and the inner wall of the heating chamber of the microwave oven. Fire phenomenon.
  • the first auxiliary agent and the second auxiliary agent are one or more of a leveling agent, an antifoaming agent, a bactericide, a thickener, a dispersing agent, a pH adjusting agent, a matting agent, and a dispersing agent.
  • a leveling agent an antifoaming agent, a bactericide, a thickener, a dispersing agent, a pH adjusting agent, a matting agent, and a dispersing agent.
  • the first silica sol and the first silane are mixed and subjected to rolling and aging for 5 hours, and the first silica sol and the first silane are stirred, and the first auxiliary agent is The rolling aging time is 5 hours, and then the first silica sol and the first silane are mixed with the first auxiliary agent and mixed and stirred for 30 minutes, and the rotation speed of the mixing and stirring is in the range of 60 rpm to 120 rpm. .
  • the second silica sol and the second silane are mixed and subjected to rolling and aging for 5 hours, and the second silica sol and the second silane are stirred, and the second auxiliary agent is used.
  • the rolling aging time is 5 hours, and then the second silica sol and the second silane mixed with the second auxin are mixed and stirred for 30 minutes, and the rotation speed of the mixing is in the range of 60 rpm to 120 rpm. .
  • step one the formed first coating reagent can be further filtered.
  • step two the formed second coating reagent can be further processed.
  • the first coating reagent is filtered through a first metal mesh, such as a mesh of stainless steel having a mesh size of 400 mesh.
  • the second coating reagent is filtered through a second metal mesh, for example, a mesh made of stainless steel having a mesh number of 100 mesh to 150 mesh.
  • step three the body 11 of the grill 10 is sandblasted by gold grit. In this way, the adhesion to the body 11 of the grill 10 can be improved.
  • the body 11 of the grill 10 is constructed of a metallic material, such as aluminum or an aluminum alloy. Before the body 11 of the grill 10 is sandblasted, the body 11 of the grill 10 may be cleaned to improve the adhesion of the body 11 of the grill 10, and the body 11 of the grill 10 may be prevented from being contaminated. Wherein, when the body 11 of the grill 10 is cleaned, the body 11 of the grill 10 may be washed first by a method such as solvent washing, dipping (first washing by ultrasonic wave) or gas washing, and then washing the body 11 of the grill 10 Alkaline degreasing is carried out. Alkaline degreasing can be accomplished by using caustic soda.
  • the number of mesh of the grit is between 60 mesh and 80 mesh.
  • the method of cleaning the body 11 of the blasted grill 10 includes purging by high pressure air or by rinsing with water. In this way, the cleanliness of the grill 10 after the blasting treatment can be ensured.
  • step four the temperature for preheating the body 11 of the grill 10 after the third step is in the range of 45 ° C to 55 ° C. In this way, it is ensured that the body 11 of the grill 10 is in a dry state before being sprayed.
  • a first coating agent is sprayed onto the surface of the body 11 of the grill 10 by using a spray gun to form a first pre-coating.
  • the mouth of the spray gun is round, and the size of the mouth of the spray gun ranges from 0.8mm to 1.2mm.
  • the spray gun spray pressure ranges from 0.15 MPa to 0.2 MPa.
  • the distance between the spray gun and the body 11 of the grill 10 during spraying ranges from 20 cm to 30 cm.
  • a second coating agent is sprayed onto the first pre-coating surface by using a spray gun to form a second pre-coating.
  • the mouth of the spray gun is round, and the size of the mouth of the spray gun ranges from 1.0 mm to 1.5 mm.
  • the spray gun spray pressure ranges from 0.25 MPa to 0.35 MPa.
  • the distance between the spray gun and the first precoat layer during spraying ranges from 20 cm to 30 cm.
  • the uniformity of the formed first precoat layer and the second precoat layer can be ensured, and the first precoat layer and the second precoat layer have better adhesion.
  • step four the temperature at which the first precoat layer is pre-dried ranges from 60 ° C to 80 ° C, and the pre-drying time is 10 min.
  • the temperature for pre-drying the second pre-coat layer ranges from 60 ° C to 80 ° C, and the pre-drying time is 10 min.
  • the temperature of the body 11 of the grill 10 is high, and then the first pre-coating layer is performed.
  • Pre-drying (as shown by the pre-drying thermostatic line 1), after the pre-drying, the temperature of the body 11 of the grill 10 is lowered, and the temperature of the body 11 of the grill 10 is required to be not lower than 45 ° C to 55 ° C.
  • the second coating reagent is sprayed under the state.
  • the temperature of the body 11 of the grill 10 is close to 60 ° C to 80 ° C, so that it is not necessary to preheat the body 11 of the grill 10, and then directly A second coating agent is sprayed onto the surface of the first precoat to form a second precoat.
  • the second precoat is then pre-dried (as indicated by pre-drying thermostat 2).
  • the sintering temperature for sintering the first pre-coat layer and the second pre-coat layer ranges from 270 ° C to 300 ° C.
  • the sintering temperature has little effect on the first silica particles and the second silica particles, and the first silica particles and the second silica particles are not easily affected by the sintering temperature to aggregate and grow.
  • the temperature during the sintering of the first pre-coating layer and the second pre-coating layer is changed, and the “sintering temperature” refers to the sintering of the first pre-coating layer and the second pre-coating layer. Maximum temperature.
  • the molding effect of the first precoat layer and the second precoat layer can be improved by performing sintering at a sintering temperature for a certain period of time.
  • the sintering temperature is 280 ° C
  • the sintering time is constant in the range of sintering time. 10min ⁇ 20min.
  • the first pre-coating layer and the second pre-coating layer have strong adhesion, and at the same time, the sintering temperature has less influence on the first silica particles and the second silica particles in the coating layer, so that A silica particle and a second silica particle are not easily aggregated and grown by the influence of sintering temperature and time, thereby ensuring that the first coating layer formed in the second coating layer and the second coating layer have a sufficient amount of nanometer first Silica particles and second silica particles.
  • the temperature at which the first precoat layer and the second precoat layer are sintered may be 270 ° C, 290 ° C or 300 ° C, and the like.
  • the coating 12 can be made by a spray coating method of the grill, wherein the physical properties of the first coating reagent and the second coating reagent used are as shown in Table 1:
  • the viscosity was obtained by using the Iwata No. 2 viscosity cup test, and the solid portion was dried at a temperature of 180 ° C for 10 minutes.
  • the temperature profile of the first pre-coating layer and the second pre-coating layer is obtained by the spraying method of the grill, and the first pre-coating layer and the second pre-coating layer are sintered as shown in FIG. 4, wherein the abscissa indicates time ( t/min), the ordinate indicates the temperature (T/°C).
  • the first precoat layer is pre-dried as indicated by the pre-drying thermostatic line 1
  • the second pre-coat layer is pre-dried as indicated by the pre-drying thermostatic line 2.
  • the first precoat layer and the second precoat layer were pre-dried at a temperature of 60 ° C and the pre-drying time was 10 min. It should be noted that the temperature for pre-drying the first pre-coat layer and the second pre-coat layer cannot exceed 120 ° C to prevent the coating from deteriorating.
  • the temperature is gradually increased, and the sintering temperature is 280 ° C, so that the first pre-coating layer and the second pre-coating layer are sintered, and the temperature is sintered at 280 ° C for a constant temperature. 15min (as shown in the sintering thermostat line in Figure 4). Then, a stepwise cooling is performed to ensure the structural stability of the formed first coating layer 121 and second coating layer 122.
  • the first coating layer 121 and the second coating layer 122 respectively formed by the first coating reagent and the second coating reagent have the characteristics as shown in Table 2:
  • the coating 12 obtained by the spraying method of the grill has better surface glossiness, has greater hardness, and has heat resistance of 500 ° C and lower heat transfer rate, and has better Oil resistance, water resistance, non-stickiness and easy cleaning.
  • a microwave oven according to an embodiment of the present invention includes the grill 10 according to any of the above embodiments.
  • the coating 12 covers the body 11 and the coating layer 12 includes a plurality of nano-sized silica particles, the heat transfer rate of the grill 10 can be effectively reduced, thereby causing the grill 10 It has better heat insulation effect, so that the food on the grill 10 can be effectively prevented from being coked due to overheating.
  • the grill 10 can be placed in a heating chamber of a microwave oven.
  • the heating chamber of the microwave oven is made of a metal material. Since the body 11 of the grill 10 is covered by the coating 12, it is possible to prevent the body 11 from coming into contact with the inner wall of the heating chamber of the microwave oven to cause microwave ignition.
  • the first feature "on” or “under” the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. It is not in direct contact but through additional features between them.
  • the first feature "above”, “above” and “above” the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature includes the first feature directly below and below the second feature, or merely the first feature level being less than the second feature.

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Abstract

一种烤架(10)及其喷涂方法及微波炉，烤架(10)包括本体(11)及包覆本体(11)的涂层(12)，涂层(12)包括纳米级的多个二氧化硅颗粒。由于涂层(12)包覆烤架(10)本体(11)，并且涂层(12)包括多个纳米级的二氧化硅颗粒，这样可有效降低烤架(10)的热传递速率，从而使得烤架(10)具有较好的隔热效果，有效避免烤架(10)上的食物因过热而导致焦化。

Description

烤架及其喷涂方法及微波炉
优先权信息
本申请请求2017年02月28日向中国国家知识产权局提交的、专利申请号为201710113403.0的专利申请的优先权和权益，并且通过参照将其全文并入此处。
技术领域
本发明涉及家用电器领域，尤其是涉及一种烤架及其喷涂方法及微波炉。
背景技术
在相关技术中，微波炉用的烤架隔热效果较差，容易过热而引发烤架上的食物起火而导致食物焦化，上述情况还会导致微波炉出现安全隐患。
发明内容
本发明旨在至少解决相关技术中存在的技术问题之一。为此，本发明需要提供一种烤架及其喷涂方法及微波炉。
本发明实施方式的烤架用于微波炉，所述烤架包括本体及包覆所述本体的涂层，所述涂层包括纳米级的多个二氧化硅颗粒。
在本发明实施方式的烤架中，由于涂层包覆本体，并且涂层包括多个纳米级的二氧化硅颗粒，这样可有效降低烤架的热传递速率，从而使得烤架具有较好的隔热效果，从而可有效避免烤架上的食物因过热而导致焦化。
在一个实施方式中，所述涂层包括纳米级的半导体氧化物颗粒。
在一个实施方式中，所述涂层包括第一涂层及第二涂层，所述第一涂层及所述第二涂层依次包覆所述本体，所述第一涂层隔开所述第二涂层及所述本体，所述多个二氧化硅颗粒包括第一二氧化硅颗粒及第二二氧化硅颗粒，所述第一涂层包括所述第一二氧化硅颗粒，所述第二涂层包括所述第二二氧化硅颗粒。
在一个实施方式中，所述第一涂层的厚度的范围为20μm～25μm，所述第二涂层的厚度的范围为8μm～10μm。
在一个实施方式中，所述第一涂层由第一涂料试剂喷涂在所述本体的外表面上而形成，所述第一涂料试剂包括第一硅溶胶、第一硅烷及第一助剂，所述第二涂层由第二涂 料试剂喷涂在所述第一涂层的外表面上而形成，所述第二涂料试剂包括第二硅溶胶、第二硅烷及第二助剂，所述第一硅溶胶包括所述第一二氧化硅颗粒，所述第二硅溶胶包括所述第二二氧化硅颗粒，所述第一助剂及所述第二助剂由流平剂、消泡剂、杀菌剂、增稠剂、分散剂、pH调节剂、消光剂、分散剂中的一种或多种构成。
在一个实施方式中，所述第一硅溶胶占所述第一涂料试剂的质量百分数的范围为30％～50％，所述第一硅烷占所述第一涂料试剂的质量百分数的范围为20％～50％，所述第一助剂占所述第一涂料试剂的质量百分数的范围为0％～40％，所述第一硅溶胶与所述第一硅烷的质量总和占所述第一涂料试剂的质量百分数大于或等于60％。
在一个实施方式中，所述第一硅溶胶占所述第一涂料试剂的质量百分数为33％，所述第一硅烷占所述第一涂料试剂的质量百分数为27％，所述第一助剂占所述第一涂料试剂的质量百分数为40％。
在一个实施方式中，所述第二硅溶胶占所述第二涂料试剂的质量百分数的范围为40％～55％，所述第二硅烷占所述第二涂料试剂的质量百分数的范围为35％～45％，所述第二助剂占所述第二涂料试剂的质量百分数的范围为0％～20％，所述第二硅溶胶与所述第二硅烷的质量总和占所述第二涂料试剂的质量百分数大于或等于80％。
在一个实施方式中，所述第二硅溶胶占所述第二涂料试剂的质量百分数为49.5％，所述第二硅烷占所述第二涂料试剂的质量百分数为40.5％，所述第二助剂占所述第二涂料试剂的质量百分数为10％。
在一个实施方式中，所述多个二氧化硅颗粒形成有纳米级的至少一层二氧化硅层。
在一个实施方式中，所述涂层包括第一涂层及第二涂层，所述第一涂层及所述第二涂层依次包覆所述本体，所述第一涂层隔开所述第二涂层及所述本体，所述至少一层二氧化硅层包括第一二氧化硅层及第二二氧化硅层，所述第一涂层包括所述第一二氧化硅层，所述第二涂层包括所述第二二氧化硅层。
在一个实施方式中，所述本体包括闭合的框体及网格层，所述框体围绕所述网格层，所述框体与所述网格层固定连接，所述网格层包括多个第一支撑条及与所述多个第一支撑条交叉的多个第二支撑条，所述多个第一支撑条沿所述框体的长度方向间隔分布，所述多个第二支撑条沿所述框体的宽度方向间隔分布，相邻的两个所述第一支撑条之间的间距大于或等于40mm，相邻的两个所述第二支撑条之间的间距大于或等于40mm。
在一个实施方式中，相邻的两个所述第一支撑条之间的间距等于65mm，相邻的两个所述第二支撑条之间的间距等于100mm。
本发明实施方式的烤架的喷涂方法包括：
步骤一：将第一硅溶胶及第一硅烷混合并进行滚动熟化，并将第一助剂进行滚动熟 化，然后将滚动熟化后的所述第一硅溶胶及所述第一硅烷与所述第一助剂混合并进行搅拌以形成第一涂料试剂，所述第一硅溶胶包括纳米级的第一二氧化硅颗粒；
步骤二：将第二硅溶胶及第二硅烷混合并进行滚动熟化，并将第二助剂进行滚动熟化，然后将滚动熟化后的所述第二硅溶胶及所述第二硅烷与所述第二助剂混合并进行搅拌以形成第二涂料试剂，所述第二硅溶胶包括纳米级的第二二氧化硅颗粒；
步骤三：将烤架的本体进行喷砂处理，并对喷砂处理后的所述烤架的本体进行清洗；
步骤四：将经由所述步骤三处理后的所述烤架的本体进行预热，再将所述第一涂料试剂喷涂在所述烤架的本体的表面上以形成完全覆盖所述烤架的本体的第一预涂层，然后对所述第一预涂层进行预干燥；
步骤五：在经由所述步骤四处理后的所述烤架的本体的温度大于或等于在所述步骤四中对所述烤架的本体进行预热时的温度时，再将所述第二涂料试剂喷涂在所述第一预涂层的表面上以形成完全覆盖所述第一预涂层的第二预涂层，然后对所述第二预涂层进行预干燥；
步骤六：将所述第一预涂层及所述第二预涂层进行烧结以分别形成第一涂层及第二涂层。
在本发明实施方式的烤架的喷涂方法中，由于涂层包覆本体，并且涂层包括多个纳米级的二氧化硅颗粒，这样可有效降低烤架的热传递速率，从而使得烤架具有较好的隔热效果，从而可有效避免烤架上的食物因过热而导致焦化。
在一个实施方式中，在所述步骤六中，将所述第一预涂层及所述第二预涂层进行烧结的烧结温度的范围在270℃～300℃。
在一个实施方式中，所述烧结温度为280℃，在所述烧结温度恒温烧结的时间的范围在10min～20min。
本发明实施方式的微波炉包括上述任一实施方式所述的烤架。
在本发明实施方式的微波炉中，由于涂层包覆本体，并且涂层包括多个纳米级的二氧化硅颗粒，这样可有效降低烤架的热传递速率，从而使得烤架具有较好的隔热效果，从而可有效避免烤架上的食物因过热而导致焦化。
本发明实施方式的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施方式的描述中将变得明显和容易理解，其中：
图1是本发明实施方式的烤架的平面示意图。
图2是本发明实施方式的烤架的本体与涂层的剖面示意图。
图3是本发明实施方式的烤架的本体与涂层的另一剖面示意图。
图4是本发明实施方式的烤架的涂层的温度变化曲线示意图。
主要元件符号说明：
烤架10；
本体11、框体111、网格层112、第一支撑条113、第二支撑条114、本体11a、涂层12、涂层12a、第一涂层121、第二涂层122、二氧化硅层123a、第一二氧化硅层1231a、第二二氧化硅层1232a。
具体实施方式
下面详细描述本发明的实施方式，所述实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接。可以是机械连接，也可以是电连接。可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
请一并参阅图1及图2，本发明实施方式的烤架10用于微波炉。烤架10包括本体11及包覆本体11的涂层12。涂层12包括纳米级的多个二氧化硅颗粒(图未示出)。
在本发明实施方式的烤架10中，由于涂层12包覆本体11，并且涂层12包括多个 纳米级的二氧化硅颗粒，这样可有效降低烤架10的热传递速率，从而使得烤架10具有较好的隔热效果，从而可有效避免烤架10上的食物因过热而导致焦化。
可以理解，涂层12可不完全包裹本体11，也可完全包裹本体11。例如在一个例子中，本体11基本呈矩形状，本体11的四个边角位置处可不喷涂涂层12，这样不影响烤架10的正常使用。优选的，本体11可由金属材料构成，涂层12为完全包裹本体11。这样涂层12可完全避免油污及水等物质与本体11直接接触，同时完全包裹本体11的涂层可有效避免本体11过热，并可避免本体11与微波炉的加热腔室的内壁而产生微波打火现象。
需要说明的是，纳米级的二氧化硅颗粒的尺寸范围在1nm～100nm。纳米级的二氧化硅颗粒还可提高涂层12的抗老化性能及强度，并可降低涂层12的表面粗糙度，使得油污或水等物质不易于粘结在涂层12上，从而提高烤架10的自清洁能力。
在一些例子中，二氧化硅颗粒的尺寸为20nm、30nm、40nm、60nm、70nm或90nm。二氧化硅颗粒的尺寸并不仅限于上述例子中列举的值。
在一个实施方式中，涂层12包括纳米级的半导体氧化物颗粒。如此，纳米级的半导体氧化物颗粒可进一步提高涂层12的静电屏蔽性能，从而可防止烤架10因静电而产生打火现象。
在一些例子中，半导体氧化物颗粒包括氧化钛、氧化铬、氧化锌等。需要说明的是，半导体氧化物颗粒并不仅限于上述例子中所列举的氧化物。半导体氧化物颗粒和二氧化硅颗粒可按需进行比例混合。
在一个实施方式中，涂层12包括第一涂层121及第二涂层122。第一涂层121及第二涂层122依次包覆本体11。第一涂层121隔开第二涂层122及本体11。多个二氧化硅颗粒包括第一二氧化硅颗粒(图未示出)及第二二氧化硅颗粒(图未示出)。第一涂层121包括第一二氧化硅颗粒。第二涂层122包括第二二氧化硅颗粒。
如此，多个涂层依次包覆本体11的设置方式可进一步提高涂层12的强度及稳定性，从而增强对本体11的保护效果，从而延长了烤架10的使用寿命。
在本发明实施方式中，第一涂层121包括多个第一二氧化硅颗粒。第二涂层122包括多个第二二氧化硅颗粒。
需要说明的是，第一二氧化硅颗粒的尺寸范围在1nm～100nm。第二二氧化硅颗粒的尺寸范围在1nm～100nm。第一二氧化硅颗粒的尺寸可与第二二氧化硅颗粒的尺寸相同，也可与第二二氧化硅颗粒的尺寸不相同，具体可根据实际应用选择。
在一个实施方式中，第一涂层121的厚度的范围为20μm～25μm。第二涂层122的厚度的范围为8μm～10μm。
如此，第一涂层121可作为涂层12的底涂层，较厚的第一涂层121可保证涂层12与本体11之间能够形成较强的附着力，并利于第二涂层122的包裹，同时第二涂层122可作为涂层12的面涂层，适中厚度的第二涂层122可进一步提高涂层12的强度及稳定性，并可通过改变第二涂层122的配比以进一步降低涂层12的表面粗糙度。
在一些例子中，第一涂层121的厚度为20μm、21μm、22μm、23μm、24μm或25μm。第二涂层122的厚度为8μm、9μm或10μm。需要说明的是，第一涂层121及第二涂层122的厚度并不仅限于上述例子中所列举的值。
在一个实施方式中，第一涂层121由第一涂料试剂喷涂在本体11的外表面上而形成。第一涂料试剂包括第一硅溶胶、第一硅烷及第一助剂。第二涂层122由第二涂料试剂喷涂在第一涂层121的外表面上而形成。第二涂料试剂包括第二硅溶胶、第二硅烷及第二助剂。第一硅溶胶包括第一二氧化硅颗粒。第二硅溶胶包括第二二氧化硅颗粒。第一助剂及第二助剂由流平剂、消泡剂、杀菌剂、增稠剂、分散剂、pH调节剂、消光剂、分散剂中的一种或多种构成。
如此，由第一涂料试剂形成的第一涂层121的附着力较好，并具有较好的耐磨及耐热性能，同时具有较低的热传递速率。由第二涂料试剂形成的第二涂层122的附着力较好，并具有较好的耐磨及耐热性能，同时具有较低的热传递速率。进一步地，第一涂料试剂的组分与第二涂料试剂的组分接近，这样可降低第二涂层122包裹第一涂层121的难度，进一步保证第二涂层122包裹第一涂层121附着力。
在本发明实施方式中，在第一硅溶胶中，第一二氧化硅颗粒均匀地分散在溶胶中。在第二硅溶胶中，第二二氧化硅颗粒均匀地分散在溶胶中。
需要说明的是，第一硅烷可与第二硅烷相同，也可与第二硅烷不同。具体可根据实际应用选择。例如，第一硅烷与第二硅烷可均为有机硅烷。
在一个实施方式中，第一涂料试剂还包括第一色粉。第二涂料试剂还包括第二色粉。
如此，色粉可改变涂层12的颜色，提高烤架10的美观度。
在一些示例中，第一色粉及第二色粉可为无机颜料或有机颜料。
在一个实施方式中，第一硅溶胶占第一涂料试剂的质量百分数的范围为30％～50％。第一硅烷占第一涂料试剂的质量百分数的范围为20％～50％。第一助剂占第一涂料试剂的质量百分数的范围为0％～40％。第一硅溶胶与第一硅烷的质量总和占第一涂料试剂的质量百分数大于或等于60％。
如此，第一涂料试剂的稳定性较好，第一二氧化硅颗粒能够较为稳定且均匀地分散在第一涂料试剂中，并且由第一涂料试剂喷涂而形成的第一涂层121具有较好的耐磨及隔热性能。同时，由于第一硅溶胶与第一硅烷的质量总和占第一涂料试剂的质量百分数 大于或等于60％，第一助剂不会影响第一二氧化硅颗粒及第一硅烷分散在第一涂料试剂中的稳定性。
在一个实施方式中，第一硅溶胶占第一涂料试剂的质量百分数为33％。第一硅烷占第一涂料试剂的质量百分数为27％。第一助剂占第一涂料试剂的质量百分数为40％。
如此，第一硅溶胶的比例适中，第一涂料试剂的稳定性较佳，第一二氧化硅颗粒能够较为稳定且均匀地分散在第一涂料试剂中，即在第一涂料试剂喷涂前，第一二氧化硅颗粒不容易聚集，这样可保证由第一涂料试剂喷涂而形成的第一涂层121的耐磨及隔热性能。
在其他实施方式中，第一硅溶胶占第一涂料试剂的质量百分数还可为30％、31％、32％或35％等。第一硅烷占第一涂料试剂的质量百分数为25％、26％、28％或29％等。第一助剂占第一涂料试剂的质量百分数为35％、36％、37％或38％等。
在一个实施方式中，第二硅溶胶占第二涂料试剂的质量百分数的范围为40％～55％。第二硅烷占第二涂料试剂的质量百分数的范围为35％～45％。第二助剂占第二涂料试剂的质量百分数的范围为0％～20％。第二硅溶胶与第二硅烷的质量总和占第二涂料试剂的质量百分数大于或等于80％。
如此，第二涂料试剂的稳定性较好，第二二氧化硅颗粒能够较为稳定且均匀地分散在第二涂料试剂中，并且由第二涂料试剂喷涂而形成的第二涂层122具有较好的耐磨及隔热性能。同时，由于第二硅溶胶与第二硅烷的质量总和占第二涂料试剂的质量百分数大于或等于80％，这样可保证第二涂层122的致密度，并且使得第二助剂不会影响第二二氧化硅颗粒及第二硅烷分散在第二涂料试剂中的稳定性。
在一个实施方式中，第二硅溶胶占第二涂料试剂的质量百分数为49.5％。第二硅烷占第二涂料试剂的质量百分数为40.5％。第二助剂占第二涂料试剂的质量百分数为10％。
如此，第二涂料试剂的稳定性较佳，第二二氧化硅颗粒能够较为稳定且均匀地分散在第二涂料试剂中，即在第二涂料试剂喷涂前，第二二氧化硅颗粒不容易聚集，这样可保证由第二涂料试剂喷涂而形成的第二涂层122的耐磨及隔热性能。同时，第二硅溶胶占第二涂料试剂的质量百分数相对较大，这样可提高第二涂层122的密度，从而进一步降低涂层12的表面粗糙度。
在其他实施方式中，第二硅溶胶占第二涂料试剂的质量百分数还可为40％、42％、46％或51％等。第二硅烷占第二涂料试剂的质量百分数为36％、38％、40％或42％等。第二助剂占第二涂料试剂的质量百分数为6％、8％、9％或12％等。
请参阅图3，在一个实施方式中，多个二氧化硅颗粒形成纳米级的至少一层二氧化硅层123a。
如此，纳米级的二氧化硅层123a具有较好的热阻性能，可进一步降低涂层12a的热传递效率，并可提高涂层12a的耐磨及耐热性能。
需要说明的是，纳米级的二氧化硅层123a的厚度的范围在1nm～100nm。在一些例子中，二氧化硅层123a的厚度为20nm、30nm、40nm、60nm、70nm或90nm。二氧化硅层123a的厚度并不仅限于上述例子中列举的值。
在一个实施方式中，涂层12a包括第一涂层121a及第二涂层122a。第一涂层121a及第二涂层122a依次包覆本体11a。第一涂层121a隔开第二涂层122a及本体11a。至少一层二氧化硅层123a包括第一二氧化硅层1231a及第二二氧化硅层1232a。第一涂层121a包括第一二氧化硅层1231a。第二涂层122a包括第二二氧化硅层1232a。
如此，多个涂层依次包覆本体11a的设置方式可进一步提高涂层12a的强度及稳定性，从而增强对本体11a的保护效果。同时，多个二氧化硅纳米层进一步提高了涂层12a的硬度及隔热性能。
需要说明的是，第一二氧化硅层1231a的厚度的尺寸范围在1nm～100nm。第二二氧化硅层1232a的厚度的尺寸范围在1nm～100nm。第一二氧化硅层1231a的厚度可与第二二氧化硅层1232a的厚度相同，也可与第二二氧化硅层1232a的厚度不相同，具体可根据实际应用选择。
在一个实施方式中，本体11包括闭合的框体111及网格层112。框体111围绕网格层112。框体111与网格层112固定连接。网格层112包括多个第一支撑条113及与多个第一支撑条113交叉的多个第二支撑条114。多个第一支撑条113沿框体111的长度方向间隔分布(如图1中的Y轴方向所示)。多个第二支撑条114沿框体111的宽度方向间隔分布(如图1中的X轴方向所示)。相邻的两个第一支撑条113之间的间距d1大于或等于40mm。相邻的两个第二支撑条114之间的间距d2大于或等于40mm。
如此，由于网格层112的多个第一支撑条113及多个第二支撑条114的分布较为规整，并且相邻的两个支撑条之间的间距大于或等于40mm，这样保证了相邻的两个支撑条之间具有充分的间距且多个第一支撑条113与多个第二支撑条114交叉形成的开口分布较为规则，从而可有效降低网体层112上微波聚集的概率，并可使得具有烤架10的微波炉不容易出现自身打火及食物着火现象。
在本发明示例中，作为框体111的本体由金属材料制成，作为第一支撑条113及第二支撑条114的本体由金属材料制成，金属材料例如为铁。
在一个实施方式中，相邻的两个第一支撑条113之间的间距d1等于65mm。相邻的两个第二支撑条114之间的间距d2等于100mm。
如此，相邻的两个第一支撑条113之间的间距适中，相邻的两个第二支撑条114之 间的间距适中，这样既可保证烤架10具有较大的实际承载面积，又能够有效降低网体层112上微波聚集的概率。
需要指出的是，由于本体11由涂层12包裹，这样在第一支撑条113与第二支撑条114交叉的连接处也由涂层12保护，这样使得第一支撑条113与第二支撑条114交叉的连接处不容易产生微波打火现象。
本发明实施方式的烤架的喷涂方法包括：
步骤一：将第一硅溶胶及第一硅烷混合并进行滚动熟化，并将第一助剂进行滚动熟化，然后将滚动熟化后的第一硅溶胶及第一硅烷与第一助剂混合并进行搅拌以形成第一涂料试剂，第一硅溶胶包括纳米级的第一二氧化硅颗粒；
步骤二：将第二硅溶胶及第二硅烷混合并进行滚动熟化，并将第二助剂进行滚动熟化，然后将滚动熟化后的第二硅溶胶及第二硅烷与第二助剂混合并进行搅拌以形成第二涂料试剂，第二硅溶胶包括纳米级的第二二氧化硅颗粒；
步骤三：将烤架10的本体11进行喷砂处理，并对喷砂处理后的烤架10的本体11进行清洗；
步骤四：将经由步骤三处理后的烤架10的本体11进行预热，再将第一涂料试剂喷涂在烤架10的本体11的表面上以形成覆盖本体11的第一预涂层，然后对第一预涂层进行预干燥；
步骤五：在经由步骤四处理后的烤架10的本体11的温度大于或等于在步骤四中对烤架10的本体11进行预热时的温度时，再将第二涂料试剂喷涂在第一预涂层的表面上以形成覆盖第一预涂层的第二预涂层，然后对第二预涂层进行预干燥；
步骤六：将第一预涂层及第二预涂层进行烧结以分别形成第一涂层及第二涂层。
在本发明实施方式的烤架10的喷涂方法中，由于涂层12包覆本体11，并且涂层12包括多个纳米级的二氧化硅颗粒，这样可有效降低烤架10的热传递速率，从而使得烤架10具有较好的隔热效果，从而可有效避免烤架10上的食物因过热而导致焦化。
可以理解，涂层12可不完全包裹本体11，也可完全包裹本体11。例如在一个例子中，本体11基本呈矩形状，本体11的四个边角位置处可不喷涂涂层12，这样不影响烤架10的正常使用。优选的，本体11可由金属材料构成，涂层12为完全包裹本体11。这样涂层12可完全避免油污及水等物质与本体11直接接触，同时完全包裹本体11的涂层可有效避免本体11过热，并可避免本体11与微波炉的加热腔室的内壁而产生微波打火现象。
在一个实施方式中，第一助剂及第二助剂由流平剂、消泡剂、杀菌剂、增稠剂、分散剂、pH调节剂、消光剂、分散剂中的一种或多种构成。
在一个实施方式中，在步骤一中，将第一硅溶胶及第一硅烷混合并进行滚动熟化的时间为5小时，并可对第一硅溶胶及第一硅烷进行搅拌，将第一助剂进行滚动熟化的时间为5小时，然后将滚动熟化后的第一硅溶胶及第一硅烷与第一助剂混合并进行混合搅拌的时间为30分钟，进行混合搅拌的转速的范围在60rpm～120rpm。
如此，可保证第一助剂完全分散在第一涂料试剂中且无沉淀物，同时可保证第一涂料试剂的稳定性。
在一个实施方式中，在步骤二中，将第二硅溶胶及第二硅烷混合并进行滚动熟化的时间为5小时，并可对第二硅溶胶及第二硅烷进行搅拌，将第二助剂进行滚动熟化的时间为5小时，然后将滚动熟化后的第二硅溶胶及第二硅烷与第二助剂混合并进行混合搅拌的时间为30分钟，进行混合搅拌的转速的范围在60rpm～120rpm。
如此，可保证第二助剂完全分散在第二涂料试剂中且无沉淀物，同时可保证第二涂料试剂的稳定性。
在本发明示例中，在步骤一中，可将形成的第一涂料试剂再进行过滤。在步骤二中，可将形成的第二涂料试剂再进行。
如此，可去除涂料试剂中的杂质。
在一些示例中，第一涂料试剂通过第一金属网过滤，第一金属网例如为目数为400目的不锈钢制的网。第二涂料试剂通过第二金属网过滤，第二金属网例如为目数为100目～150目的不锈钢制的网。
在一个实施方式中，在步骤三中，烤架10的本体11通过金钢砂进行喷砂处理。如此，可提高在烤架10的本体11的附着力。
在本发明示例中，烤架10的本体11由金属材料构成，例如铝或铝合金。在对烤架10的本体11进行喷砂处理前，可先对烤架10的本体11进行清洗，以提高烤架10的本体11的附着力，并可防止烤架10的本体11受污染。其中，对烤架10的本体11进行清洗时，可先通过溶剂洗净、浸渍(先可通过超音波洗净)或气体洗净中的一种方法将烤架10的本体11洗净，然后再进行碱脱脂。碱脱脂可通过使用烧碱完成。
在一些示例中，金钢砂的目数在60目～80目。
在一个实施方式中，在步骤三中，对喷砂处理后的烤架10的本体11进行清洗的方法包括通过高压空气吹洗或通过水流冲洗。如此，可保证喷砂处理后的烤架10的洁净度。
在一个实施方式中，在步骤四中，将经由步骤三处理后的烤架10的本体11进行预热的温度的范围在45℃～55℃。如此，可保证烤架10的本体11在进行喷涂前处于干燥状态。
在步骤四的一个例子中，通过使用喷枪将第一涂料试剂喷涂在烤架10的本体11的表面上以形成第一预涂层。其中，喷枪的口呈圆形，喷枪的口的尺寸范围在0.8mm～1.2mm。喷枪喷涂的压力范围在0.15MPa～0.2Mpa。喷涂时喷枪与烤架10的本体11之间的距离的范围在20cm～30cm。
在步骤五的一个例子中，通过使用喷枪将第二涂料试剂喷涂在第一预涂层表面上以形成第二预涂层。其中，喷枪的口呈圆形，喷枪的口的尺寸范围在1.0mm～1.5mm。喷枪喷涂的压力范围在0.25MPa～0.35Mpa。喷涂时喷枪与第一预涂层之间的距离的范围在20cm～30cm。
如此，可保证形成的第一预涂层及第二预涂层的均匀性，并使得第一预涂层及第二预涂层具有较好的附着力。
在一个实施方式中，在步骤四中，对第一预涂层进行预干燥的温度的范围在60℃～80℃，预干燥的时间为10min。在步骤五中，对第二预涂层进行预干燥的温度的范围在60℃～80℃，预干燥的时间为10min。
如此，可防止第一预涂层及第二预涂层产生裂缝或起泡，并可保证第一预涂层及第二预涂层的光泽度较好。
请参阅图4，在本发明实施方式中，在烤架10的本体11的表面上形成第一预涂层后，烤架10的本体11的温度较高，然后再对第一预涂层进行预干燥(如预干燥恒温线1所示)，在预干燥完后，烤架10的本体11的温度会降低，这时需要在烤架10的本体11的温度不低于45℃～55℃的状态下进行第二涂料试剂的喷涂。一般情况下，在对第一预涂层预干燥完后，烤架10的本体11的温度接近60℃～80℃，所以不需要对烤架10的本体11再进行预热，便可再直接将第二涂料试剂喷涂在第一预涂层的表面上以形成第二预涂层。然后再对第二预涂层进行预干燥(如预干燥恒温线2所示)。
在一个实施方式中，在步骤六中，将第一预涂层及第二预涂层进行烧结的烧结温度的范围在270℃～300℃。
如此，能够保证由第一预涂层及第二预涂层形成的第一涂层及第二涂层具有较强的附着力，从而形成较佳的涂膜特性。同时烧结温度对第一二氧化硅颗粒及第二二氧化硅颗粒的影响较小，第一二氧化硅颗粒及第二二氧化硅颗粒不容易受烧结温度影响而聚集长大。
需要说明的是，对第一预涂层及第二预涂层进行烧结的过程中温度是变化的，“烧结温度”指的是对第一预涂层及第二预涂层进行烧结时的最高温度。可通过在一定时间范围内保持在烧结温度下进行烧结以提高第一预涂层及第二预涂层的成型效果。
在一个实施方式中，烧结温度为280℃，在烧结温度恒温烧结的时间的范围在 10min～20min。
如此，第一预涂层及第二预涂层具有较强的附着力，同时也使得烧结温度对涂层内的第一二氧化硅颗粒及第二二氧化硅颗粒的影响较小，使得第一二氧化硅颗粒及第二二氧化硅颗粒不容易受烧结温度及时间的影响而聚集长大，从而能够保证形成的第一涂层及第二涂层内具有足够量的纳米级的第一二氧化硅颗粒及第二二氧化硅颗粒。
在其他实施方式中，将第一预涂层及第二预涂层进行烧结的温度可为270℃、290℃或300℃等。
在本发明的一个例子中，涂层12可由烤架的喷涂方法制得，其中使用的第一涂料试剂及第二涂料试剂的物性如列表1所示：
列表1
参数 第一涂料试剂 第二涂料试剂
比重 1.23kg/L 0.96kg/L
粘度 9±1S 8.5±1S
理论涂布量 6.5㎡ 13㎡
固体份 48％±2 33％±2
其中，粘度通过使用岩田2号粘度杯测试所得，固体份在180℃的温度下干燥10分钟得到。
通过烤架的喷涂方法得到第一预涂层及第二预涂层，并对第一预涂层及第二预涂层进行烧结的温度变化曲线如图4所示，其中横坐标表示时间(t/min)，纵坐标表示温度(T/℃)。
其中，对第一预涂层进行预干燥如预干燥恒温线1所示，对第二预涂层进行预干燥如预干燥恒温线2所示。在图4的示例中，对第一预涂层及第二预涂层进行预干燥的温度均为60℃、预干燥的时间均为10min。需要说明的是，对第一预涂层及第二预涂层进行预干燥的温度不能够超过120℃，以防止涂层劣化。
在对第二预涂层预干燥完后，再进行逐步升温，并使得烧结温度达到280℃，以对第一预涂层及第二预涂层进行烧结，在280℃进行恒温烧结的时间为15min(如图4烧结恒温线所示)。然后，再进行逐步降温以保证形成的第一涂层121及第二涂层122的结构稳定性。
由上述第一涂料试剂及第二涂料试剂分别形成的第一涂层121及第二涂层122具有如列表2所示的特性：
列表2
参数 检测仪器或方法 检测结果
光泽 55°-60°光泽计 65±5°
硬度 三菱铅笔 大于6H
附着性 100/100方格 通过100方格5次测试
耐溶剂 酒精擦拭/无伤痕 大于或等于1000次
耐磨性 3M菜瓜布及1.5kg压力 5000次
不粘性 煮饭 300次
耐热性 300℃/30MIN 无变化
膜厚 膜厚仪 25～35um
耐热性 -- 500℃
其中，附着性使用3M胶带测试。
由测试结果可知，烤架的喷涂方法得到的涂层12的表面光泽度较佳，并具有较大的硬度，并具有500℃的耐热性和较低的热传递速率，同时具有较佳的耐油性、耐水性、不粘性和易洁性。
本发明实施方式的微波炉包括上述任一实施方式所述的烤架10。
在本发明实施方式的微波炉中，由于涂层12包覆本体11，并且涂层12包括多个纳米级的二氧化硅颗粒，这样可有效降低烤架10的热传递速率，从而使得烤架10具有较好的隔热效果，从而可有效避免烤架10上的食物因过热而导致焦化。
具体地，烤架10可放置在微波炉的加热腔室中。微波炉的加热腔室由金属材料构成。由于烤架10的本体11由涂层12包裹，这样可避免本体11与微波炉的加热腔室的内壁接触而产生微波打火现象。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下文的公开提供了许多不同的实施方式或例子用来实现本发明的不同结构。为了简化本发明的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本发明。此外，本发明可以在不同例子中重复参考数字和/或参考字 母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本发明提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
在本说明书的描述中，参考术语“一个实施方式”、“一些实施方式”、“示意性实施方式”、“示例”、“具体示例”、或“一些示例”等的描述意指结合实施方式或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施方式或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施方式或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施方式或示例中以合适的方式结合。
尽管已经示出和描述了本发明的实施方式，本领域的普通技术人员可以理解：在不脱离本发明的原理和宗旨的情况下可以对这些实施方式进行多种变化、修改、替换和变型，本发明的范围由权利要求及其等同物限定。

Claims (17)

  1. 一种烤架，用于微波炉，其特征在于，所述烤架包括本体及包覆所述本体的涂层，所述涂层包括纳米级的多个二氧化硅颗粒。
  2. 如权利要求1所述的烤架，其特征在于，所述涂层包括纳米级的半导体氧化物颗粒。
  3. 如权利要求1所述的烤架，其特征在于，所述涂层包括第一涂层及第二涂层，所述第一涂层及所述第二涂层依次包覆所述本体，所述第一涂层隔开所述第二涂层及所述本体；
    所述多个二氧化硅颗粒包括第一二氧化硅颗粒及第二二氧化硅颗粒，所述第一涂层包括所述第一二氧化硅颗粒，所述第二涂层包括所述第二二氧化硅颗粒。
  4. 如权利要求3所述的烤架，其特征在于，所述第一涂层的厚度的范围为20μm～25μm，所述第二涂层的厚度的范围为8μm～10μm。
  5. 如权利要求3所述的烤架，其特征在于，所述第一涂层由第一涂料试剂喷涂在所述本体的外表面上而形成，所述第一涂料试剂包括第一硅溶胶、第一硅烷及第一助剂，所述第二涂层由第二涂料试剂喷涂在所述第一涂层的外表面上而形成，所述第二涂料试剂包括第二硅溶胶、第二硅烷及第二助剂；
    所述第一硅溶胶包括所述第一二氧化硅颗粒，所述第二硅溶胶包括所述第二二氧化硅颗粒；
    所述第一助剂及所述第二助剂由流平剂、消泡剂、杀菌剂、增稠剂、分散剂、pH调节剂、消光剂、分散剂中的一种或多种构成。
  6. 如权利要求5所述的烤架，其特征在于，所述第一硅溶胶占所述第一涂料试剂的质量百分数的范围为30％～50％，所述第一硅烷占所述第一涂料试剂的质量百分数的范围为20％～50％，所述第一助剂占所述第一涂料试剂的质量百分数的范围为0％～40％，所述第一硅溶胶与所述第一硅烷的质量总和占所述第一涂料试剂的质量百分数大于或等于60％。
  7. 如权利要求6所述的烤架，其特征在于，所述第一硅溶胶占所述第一涂料试剂的 质量百分数为33％，所述第一硅烷占所述第一涂料试剂的质量百分数为27％，所述第一助剂占所述第一涂料试剂的质量百分数为40％。
  8. 如权利要求5所述的烤架，其特征在于，所述第二硅溶胶占所述第二涂料试剂的质量百分数的范围为40％～55％，所述第二硅烷占所述第二涂料试剂的质量百分数的范围为35％～45％，所述第二助剂占所述第二涂料试剂的质量百分数的范围为0％～20％，所述第二硅溶胶与所述第二硅烷的质量总和占所述第二涂料试剂的质量百分数大于或等于80％。
  9. 如权利要求8所述的烤架，其特征在于，所述第二硅溶胶占所述第二涂料试剂的质量百分数为49.5％，所述第二硅烷占所述第二涂料试剂的质量百分数为40.5％，所述第二助剂占所述第二涂料试剂的质量百分数为10％。
  10. 如权利要求1所述的烤架，其特征在于，所述多个二氧化硅颗粒形成至少一层二氧化硅层。
  11. 如权利要求10所述的烤架，其特征在于，所述涂层包括第一涂层及第二涂层，所述第一涂层及所述第二涂层依次包覆所述本体，所述第一涂层隔开所述第二涂层及所述本体，所述至少一层二氧化硅层包括第一二氧化硅层及第二二氧化硅层，所述第一涂层包括所述第一二氧化硅层，所述第二涂层包括所述第二二氧化硅层。
  12. 如权利要求1所述的烤架，其特征在于，所述本体包括闭合的框体及网格层，所述框体围绕所述网格层，所述框体与所述网格层固定连接，所述网格层包括多个第一支撑条及与所述多个第一支撑条交叉的多个第二支撑条，所述多个第一支撑条沿所述框体的长度方向间隔分布，所述多个第二支撑条沿所述框体的宽度方向间隔分布，相邻的两个所述第一支撑条之间的间距大于或等于40mm，相邻的两个所述第二支撑条之间的间距大于或等于40mm。
  13. 如权利要求12所述的烤架，其特征在于，相邻的两个所述第一支撑条之间的间距等于65mm，相邻的两个所述第二支撑条之间的间距等于100mm。
  14. 一种烤架的喷涂方法，其特征在于，包括：
    步骤一：将第一硅溶胶及第一硅烷混合并进行滚动熟化，并将第一助剂进行滚动熟化，然后将滚动熟化后的所述第一硅溶胶及所述第一硅烷与所述第一助剂混合并进行搅拌以形成第一涂料试剂，所述第一硅溶胶包括纳米级的第一二氧化硅颗粒；
    步骤二：将第二硅溶胶及第二硅烷混合并进行滚动熟化，并将第二助剂进行滚动熟化，然后将滚动熟化后的所述第二硅溶胶及所述第二硅烷与所述第二助剂混合并进行搅拌以形成第二涂料试剂，所述第二硅溶胶包括纳米级的第二二氧化硅颗粒；
    步骤三：将烤架的本体进行喷砂处理，并对喷砂处理后的所述烤架的本体进行清洗；
    步骤四：将经由所述步骤三处理后的所述烤架的本体进行预热，再将所述第一涂料试剂喷涂在所述烤架的本体的表面上以形成完全覆盖所述烤架的本体的第一预涂层，然后对所述第一预涂层进行预干燥；
    步骤五：在经由所述步骤四处理后的所述烤架的本体的温度大于或等于在所述步骤四中对所述烤架的本体进行预热时的温度时，再将所述第二涂料试剂喷涂在所述第一预涂层的表面上以形成完全覆盖所述第一预涂层的第二预涂层，然后对所述第二预涂层进行预干燥；
    步骤六：将所述第一预涂层及所述第二预涂层进行烧结以分别形成第一涂层及第二涂层。
  15. 如权利要求14所述的烤架的喷涂方法，其特征在于，在所述步骤六中，将所述第一预涂层及所述第二预涂层进行烧结的烧结温度的范围在270℃～300℃。
  16. 如权利要求15所述的烤架的喷涂方法，其特征在于，所述烧结温度为280℃，在所述烧结温度恒温烧结的时间的范围在10min～20min。
  17. 一种微波炉，其特征在于，包括权利要求1-13任一项所述的烤架。
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