Water-based environment-friendly magnetic and heat-conducting slurry and application method thereof

Abstract

The invention discloses water-based environment-friendly magnetic and heat-conducting slurry and an application method thereof. The water-based environment-friendly magnetic and heat-conducting slurry is prepared from the following raw materials in percentage by weight: 1 to 75 weight percent of silver elementary substance, 1 to 75 weight percent of titanium elementary substance, 0.5 to 1.5 weight percent of sulfur elementary substance, 0.1 to 0.3 weight percent of magnesium carbonate, 0.2 to 0.5 weight percent of boric acid, 0.5 to 1 weight percent of quartz, 0.1 to 0.3 weight percent of titanium dioxide, 0.1 to 0.2 weight percent of aluminum hydroxide, 0.3 to 0.5 weight percent of bismuth oxide, 1 to 2 weight percent of vanadium pentoxide, 0.05 to 0.1 weight percent of niobium oxide, 4 to 8 weight percent of acrylic resin, 12 to 17 weight percent of triethylene glycol monobutyl ether and 0.5 to 1 weight percent of cetyl alcohol polyoxyethylene ether. The slurry is coated on the surface of the bottom of glass or chinaware at high temperature to form a magnetic and heat conducting film coating, the heating efficiency of the ceramic or glass can be effectively improved, and therefore, the slurry has a wide market prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of glass or ceramics, and particularly relates to an aqueous environmentally friendly magnetic and heat conductive paste and an application method thereof. Background Art

[0002] An induction cooker heats food based on the physical principle of generating heat through electromagnetic induction. When the electromagnetic induction coil is powered on, a strong magnetic field is generated. When the magnetic field passes through a cookware that can sense magnetic lines of force placed on the induction cooker, eddy currents are generated in the cookware. These eddy currents generate heat, thereby heating the cookware and transferring the heat to the food. Induction cookers have the characteristics of fast heating speed and high efficiency, and are widely used in modern kitchens. Since the magnetic induction heating material of an induction cooker can only be made of iron or graphite materials, ceramics and glass materials cannot generate eddy current heating. Therefore, if ceramic or glass utensils are to be used, it is necessary to process and coat the bottom of the ceramic or glass cookware with metal or other magnetic and heat conductive pastes so that they can be used on an induction cooker. There is an invention that coats an iron metal layer on the bottom of glass or ceramics. Due to its large thermal expansion coefficient, it is not suitable for glass or ceramics, and it is easy to peel off after being used for a period of time. There is an invention that directly coats silver metal on the bottom of glass or ceramics to achieve electromagnetic induction heating. One of its major disadvantages is that it is easy to oxidize after being used for a long time, resulting in a significant attenuation of the power of the electromagnetic induction heating film until the operation is interrupted. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an aqueous environmentally friendly magnetic and heat conductive paste with a low melting temperature, a low thermal expansion coefficient, and strong antioxidant ability, and an application method thereof.

[0004] The present invention is achieved through the following technical solutions: An aqueous environmentally friendly magnetic and heat conductive paste, characterized in that the weight percentage composition of the raw material formula is: silver element 1 - 75wt%, titanium element 1 - 75wt%, sulfur element 0.5 - 1.5wt%, magnesium carbonate 0.1 - 0.3wt%, boric acid 0.2 - 0.5wt%, quartz 0.5 - 1wt%, titanium dioxide 0.1 - 0.3wt%, aluminum hydroxide 0.1 - 0.2wt%, bismuth oxide 0.3 - 0.5wt%, vanadium pentoxide 1 - 2wt%, niobium oxide 0.05 - 0.1wt%, acrylic resin 4 - 8wt%, triethylene glycol monobutyl ether 12 - 17wt%, cetyl alcohol polyoxyethylene ether 0.5 - 1wt%.

[0005] The application method of the above-mentioned aqueous environmentally friendly magnetic and heat conductive paste is characterized by including the following steps: Step 1: Weigh magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide according to the weight percentage of the raw material formula, perform dry ball milling and mixing, sieving, melting, air cooling, classification ball milling, drying, and airflow powdering to obtain a glass binder; Step 2: Weigh acrylic resin, triethylene glycol monobutyl ether, and cetyl alcohol polyoxyethylene ether according to the weight percentages in the raw material formula and mix them evenly to obtain a binder. Step 3: Weigh silver, titanium, and sulfur according to the weight percentages in the raw material formula, mix them with the glass binder prepared in Step 1 and the binder prepared in Step 2, and then through stirring dispersion, sanding dispersion, and sieving to obtain a water-based environmentally friendly magnetic and heat conductive slurry. Step 4: Coating the slurry prepared in Step 3 onto the bottom surface of glass or ceramics by screen printing, brushing, or spraying processes and baking, or directly coating onto the bottom surface of glass or ceramics by the thermal spraying process, to obtain a magnetic and heat conductive film coating on the bottom surface of glass or ceramics.

[0006] The mesh number of the sieve in the sieving process in Step 1 is 80 meshes, and the mesh number of the sieve in the sieving process in Step 3 is 250 meshes.

[0007] The temperature of the melting process in Step 1 is 1000 - 1050 °C.

[0008] In the classification ball milling process in Step 1, first dry mill to a particle size ≤ 20 μm, and then wet mill to a particle size of 1 - 3 μm.

[0009] The temperature of baking or thermal spraying in Step 4 is 600 - 800 °C, and the time is 4.5 - 5.5 h.

[0010] The thickness of the magnetic and heat conductive film coating prepared in Step 4 is 40 - 70 μm.

[0011] The heating power of the magnetic and heat conductive film coating prepared in Step 4 is 1785 - 2000 W, the heating efficiency ≥ 85%, and the thermal expansion coefficient is 4.6 - 5.8×10 -6 / °C.

[0012] The slurry can firmly bond the metal powder layer to the bottom surface of ceramics or glass through the glass binder at high temperatures, playing a role in electromagnetic induction heating of ceramic or glass utensils. By introducing the reducing agent sulfur to prevent the oxidation of metals, it will not increase the resistance of the metal layer, effectively improving and maintaining the heating power and efficiency, thus contributing to the technological progress and development of the electromagnetic induction furnace magnetic conductive heating material industry.

[0013] The present invention has the following beneficial effects: (1) The water-based environmentally friendly magnetic and heat conductive slurry of the present invention is water-soluble and belongs to the environmentally friendly type.

[0014] (2) The thermal expansion coefficient of the water-based environmentally friendly magnetic and heat conductive slurry after sintering of the present invention is adapted to the matrix, and the thermal expansion coefficient ≤ 5.8×10 -6 / °C, can be firmly combined with ceramics or glass, has good adhesion performance, and is not easy to scratch.

[0015] (3) The water-based environment-friendly magnetic and heat-conducting paste of the present invention can maintain stable heating power and efficiency.

[0016] (4) The application method of the present invention has simple process, low production cost, high production efficiency, low production energy consumption, economic and environmental protection, can well meet the actual production and application needs of enterprises, and has broad market prospects. Description of the Drawings

[0017] Figure 1 is the SEM detection result of the magnetic and heat-conducting film coating prepared in Example 3; Figure 2 is the Mapping detection result of the magnetic and heat-conducting film coating prepared in Example 3. Detailed Embodiments

[0018] To further illustrate the present invention, the technical means and effects adopted to achieve the predetermined invention purpose are described in detail below in combination with preferred embodiments.

[0019] Example 1

[0020] A water-based environment-friendly magnetic and heat-conducting paste, characterized in that the weight percentage composition of the raw material formula is: silver element 1wt%, titanium element 74.3wt%, sulfur element 0.5wt%, magnesium carbonate 0.2wt%, boric acid 0.2wt%, quartz 0.5wt%, titanium dioxide 0.1wt%, aluminum hydroxide 0.1wt%, bismuth oxide 0.5wt%, vanadium pentoxide 1wt%, niobium oxide 0.1wt%, acrylic resin 4wt%, triethylene glycol monobutyl ether 17wt%, cetyl alcohol polyoxyethylene ether 0.5wt%.

[0021] The application method of the above water-based environment-friendly magnetic and heat-conducting paste is characterized by including the following steps: Step 1: Weigh magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide according to the weight percentage of the raw material formula, and obtain a glass binder through dry ball milling, sieving, melting, air cooling, classification ball milling, drying, and air jet pulverization; Step 2: Weigh and mix acrylic resin, triethylene glycol monobutyl ether, and cetyl alcohol polyoxyethylene ether according to the weight percentage of the raw material formula to obtain a coupling agent; Step 3: Weigh silver element, titanium element, and sulfur element according to the weight percentage of the raw material formula, mix them with the glass binder prepared in Step 1 and the coupling agent prepared in Step 2, and obtain a water-based environment-friendly magnetic and heat-conducting paste through stirring dispersion, sanding dispersion, and sieving; Step 4: Directly coat the paste prepared in Step 3 on the bottom surface of the ceramic through the thermal spraying process to obtain a magnetic and heat-conducting film coating on the bottom surface of the ceramic.

[0022] In step one, the mesh number of the sieve in the sieving process is 80 meshes, and in step three, the mesh number of the sieve in the sieving process is 250 meshes.

[0023] In step one, the temperature of the melting process is 1000 °C.

[0024] In step one, the classification ball milling process is to first dry mill to a particle size of 16 μm and then wet mill to a particle size of 3 μm.

[0025] In step four, the temperature of the thermal spraying is 800 °C and the time is 4.5 h.

[0026] The thickness of the magnetic and heat conductive film coating obtained in step four is 40 μm.

[0027] The heating power of the magnetic and heat conductive film coating obtained in step four is 1785 W, the heating efficiency is 85%, the thermal expansion coefficient is 4.6×10 -6 / °C, and the adhesion is grade 0.

[0028] Example 2

[0029] An aqueous environmentally friendly magnetic and heat conductive slurry, characterized in that the weight percentage composition of the raw material formula is: silver element 1 wt%, titanium element 73.6 wt%, sulfur element 1.5 wt%, magnesium carbonate 0.2 wt%, boric acid 0.4 wt%, quartz 0.5 wt%, titanium dioxide 0.1 wt%, aluminum hydroxide 0.15 wt%, bismuth oxide 0.4 wt%, vanadium pentoxide 1.5 wt%, niobium oxide 0.05 wt%, acrylic resin 5 wt%, triethylene glycol monobutyl ether 15 wt%, cetyl alcohol polyoxyethylene ether 0.6 wt%.

[0030] The application method of the above aqueous environmentally friendly magnetic and heat conductive slurry is characterized by including the following steps: Step one: Weigh magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide according to the weight percentage of the raw material formula, and obtain a glass binder through dry ball milling, sieving, melting, air cooling, classification ball milling, drying, and air jet pulverization; Step two: Weigh acrylic resin, triethylene glycol monobutyl ether, and cetyl alcohol polyoxyethylene ether according to the weight percentage of the raw material formula and mix them evenly to obtain a coupling agent; Step three: Weigh silver element, titanium element, and sulfur element according to the weight percentage of the raw material formula, mix them with the glass binder obtained in step one and the coupling agent obtained in step two, and obtain an aqueous environmentally friendly magnetic and heat conductive slurry through stirring and dispersion, sanding and dispersion, and sieving; Step four: Directly coat the slurry obtained in step three onto the bottom surface of the glass through a thermal spraying process to obtain a magnetic and heat conductive film coating on the bottom surface of the glass.

[0031] In step one, the mesh number of the sieve in the sieving process is 80 meshes, and in step three, the mesh number of the sieve in the sieving process is 250 meshes.

[0032] In step one, the temperature of the melting process is 1050 °C.

[0033] In step one, the classification ball milling process is to first dry mill to a particle size of 12 μm and then wet mill to a particle size of 2 μm.

[0034] In step four, the temperature of the thermal spraying is 720 °C and the time is 4.5 h.

[0035] The thickness of the magnetic and heat conductive film coating obtained in step four is 70 μm.

[0036] The heating power of the magnetic and heat conductive film coating obtained in step four is 1900 W, the heating efficiency is 90.5%, the thermal expansion coefficient is 5.2×10 -6 / °C, and the adhesion is grade 0.

[0037] Example 3

[0038] An aqueous environmentally friendly magnetic and heat conductive slurry, characterized in that the weight percentage composition of the raw material formula is: silver element 72.75 wt%, titanium element 1 wt%, sulfur element 1 wt%, magnesium carbonate 0.3 wt%, boric acid 0.4 wt%, quartz 1 wt%, titanium dioxide 0.3 wt%, aluminum hydroxide 0.1 wt%, bismuth oxide 0.3 wt%, vanadium pentoxide 2 wt%, niobium oxide 0.05 wt%, acrylic resin 6 wt%, triethylene glycol monobutyl ether 14 wt%, cetyl alcohol polyoxyethylene ether 0.8 wt%.

[0039] The application method of the above aqueous environmentally friendly magnetic and heat conductive slurry is characterized by including the following steps: Step one: Weigh magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide according to the weight percentage of the raw material formula, and obtain a glass binder through dry ball milling, sieving, melting, air cooling, classification ball milling, drying, and air flow powdering; Step two: Weigh acrylic resin, triethylene glycol monobutyl ether, and cetyl alcohol polyoxyethylene ether according to the weight percentage of the raw material formula and mix them evenly to obtain a coupling agent; Step three: Weigh silver element, titanium element, and sulfur element according to the weight percentage of the raw material formula, mix them with the glass binder obtained in step one and the coupling agent obtained in step two, and obtain an aqueous environmentally friendly magnetic and heat conductive slurry through stirring and dispersion, sand milling dispersion, and sieving; Step four: Coating the slurry obtained in step three onto the bottom surface of the glass through screen printing, brushing, and spraying processes and baking to obtain a magnetic and heat conductive film coating on the bottom surface of the glass.

[0040] In step 1, the mesh number of the sieve in the sieving process is 80 meshes, and in step 3, the mesh number of the sieve in the sieving process is 250 meshes.

[0041] In step 1, the temperature of the melting process is 1030 °C.

[0042] In step 1, the classification ball milling process is to first dry mill to a particle size of 12 μm and then wet mill to a particle size of 1 μm.

[0043] In step 4, the temperature of the baking is 660 °C and the time is 4.5 h.

[0044] The thickness of the magnetic and heat conductive film coating prepared in step 4 is 65 μm.

[0045] The heating power of the magnetic and heat conductive film coating prepared in step 4 is 2000 W, the heating efficiency is 95.2%, the thermal expansion coefficient is 4.8×10 -6 / °C, and the adhesion is grade 0.

[0046] As Figure 1 and Figure 2 shown, the magnetic and heat conductive film coating prepared in this embodiment is composed of a metal layer and a binder layer. The metal layer is on the outer layer and the binder is on the inner layer. The binder layer penetrates through the metal layer to contact the glass surface. In this way, not only the metal layer is firmly bonded to the glass, but also the resistance of the metal layer is not increased, effectively improving the heating efficiency.

[0047] Example 4

[0048] A water-based environmentally friendly magnetic and heat conductive slurry, characterized in that the weight percentage composition of the raw material formula is: 75 wt% silver element, 2.74 wt% titanium element, 1.5 wt% sulfur element, 0.1 wt% magnesium carbonate, 0.3 wt% boric acid, 0.8 wt% quartz, 0.3 wt% titanium dioxide, 0.18 wt% aluminum hydroxide, 0.5 wt% bismuth oxide, 1.5 wt% vanadium pentoxide, 0.08 wt% niobium oxide, 4 wt% acrylic resin, 12 wt% triethylene glycol monobutyl ether, 1 wt% cetyl alcohol polyoxyethylene ether.

[0049] The application method of the above water-based environmentally friendly magnetic and heat conductive slurry is characterized by including the following steps: Step 1: Weigh magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide according to the weight percentage of the raw material formula, and obtain a glass binder through dry ball milling, sieving, melting, air cooling, classification ball milling, drying, and air flow powdering; Step 2: Weigh acrylic resin, triethylene glycol monobutyl ether, and cetyl alcohol polyoxyethylene ether according to the weight percentage of the raw material formula and mix them evenly to obtain a coupling agent; Step 3: Weigh silver, titanium, and sulfur according to the weight percentages in the raw material formula, mix them with the glass binder obtained in Step 1 and the coupling agent obtained in Step 2, and then perform stirring dispersion, sanding dispersion, and sieving to obtain a water-based environmentally friendly magnetic and heat conductive paste. Step 4: Coat the paste obtained in Step 3 onto the bottom surface of the ceramic through screen printing, brushing, or spraying processes, and then bake it to obtain a magnetic and heat conductive film coating on the bottom surface of the ceramic.

[0050] The mesh number of the sieve in the sieving process in Step 1 is 80 meshes, and the mesh number of the sieve in the sieving process in Step 3 is 250 meshes.

[0051] The temperature of the melting process in Step 1 is 1050 °C.

[0052] In the classification ball milling process in Step 1, first dry mill to a particle size of 10 μm, and then wet mill to a particle size of 1 μm.

[0053] The temperature of the baking in Step 4 is 650 °C, and the time is 5.5 h.

[0054] The thickness of the magnetic and heat conductive film coating obtained in Step 4 is 60 μm.

[0055] The heating power of the magnetic and heat conductive film coating obtained in Step 4 is 1788 W, the heating efficiency is 85.1%, the coefficient of thermal expansion is 5.5×10 -6 / °C, and the adhesion is grade 0.

[0056] Example 5

[0057] A water-based environmentally friendly magnetic and heat conductive paste, characterized in that the weight percentage composition of the raw material formula is: silver 2.55 wt%, titanium 75 wt%, sulfur 0.5 wt%, magnesium carbonate 0.2 wt%, boric acid 0.5 wt%, quartz 1 wt%, titanium dioxide 0.2 wt%, aluminum hydroxide 0.2 wt%, bismuth oxide 0.4 wt%, vanadium pentoxide 1.8 wt%, niobium oxide 0.05 wt%, acrylic resin 5 wt%, triethylene glycol monobutyl ether 12 wt%, cetyl alcohol polyoxyethylene ether 0.6 wt%.

[0058] The application method of the above water-based environmentally friendly magnetic and heat conductive paste, characterized by including the following steps: Step 1: Weigh magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide according to the weight percentages in the raw material formula, perform dry ball milling mixing, sieving, melting, air cooling, classification ball milling, drying, and air flow powdering to obtain a glass binder. Step 2: Weigh acrylic resin, triethylene glycol monobutyl ether, and cetyl alcohol polyoxyethylene ether according to the weight percentages in the raw material formula and mix them evenly to obtain a coupling agent. Step 3: Weigh silver, titanium, and sulfur according to the weight percentages in the raw material formula, mix them with the glass binder obtained in Step 1 and the coupling agent obtained in Step 2, and then through stirring dispersion, sand grinding dispersion, and sieving, an environmentally friendly water-based magnetic and heat conductive slurry is obtained. Step 4: Directly coat the slurry obtained in Step 3 onto the bottom surface of the ceramic ware through the thermal spraying process to obtain a magnetic and heat conductive film coating on the bottom surface of the ceramic ware.

[0059] The mesh number of the sieve in the sieving process in Step 1 is 80 meshes, and the mesh number of the sieve in the sieving process in Step 3 is 250 meshes.

[0060] The temperature of the melting process in Step 1 is 1010 °C.

[0061] In the classification ball milling process in Step 1, first dry mill to a particle size of 9 μm, and then wet mill to a particle size of 2 μm.

[0062] The temperature of the thermal spraying in Step 4 is 600 °C, and the time is 5 h.

[0063] The thickness of the magnetic and heat conductive film coating obtained in Step 4 is 68 μm.

[0064] The heating power of the magnetic and heat conductive film coating obtained in Step 4 is 1854 W, the heating efficiency is 88.2%, the thermal expansion coefficient is 5.8×10 -6 / °C, and the adhesion is grade 0.

[0065] Example 6

[0066] An environmentally friendly water-based magnetic and heat conductive slurry, characterized in that the weight percentage composition of the raw material formula is: silver 38.8 wt%, titanium 35.8 wt%, sulfur 1 wt%, magnesium carbonate 0.3 wt%, boric acid 0.5 wt%, quartz 0.7 wt%, titanium dioxide 0.2 wt%, aluminum hydroxide 0.2 wt%, bismuth oxide 0.5 wt%, vanadium pentoxide 1.2 wt%, niobium oxide 0.1 wt%, acrylic resin 8 wt%, triethylene glycol monobutyl ether 12 wt%, cetyl alcohol polyoxyethylene ether 0.7 wt%.

[0067] The application method of the above-mentioned environmentally friendly water-based magnetic and heat conductive slurry, characterized by including the following steps: Step 1: Weigh magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide according to the weight percentages in the raw material formula, and through dry ball milling mixing, sieving, melting, air cooling, classification ball milling, drying, and air flow powdering, a glass binder is obtained. Step 2: Weigh acrylic resin, triethylene glycol monobutyl ether, and cetyl alcohol polyoxyethylene ether according to the weight percentages in the raw material formula and mix them evenly to obtain a coupling agent. Step 3: Weigh silver, titanium, and sulfur according to the weight percentages in the raw material formula, mix them with the glass binder obtained in Step 1 and the connector obtained in Step 2, and then, through stirring dispersion, sand grinding dispersion, and sieving, obtain a water-based environmentally friendly magnetic and heat conductive paste. Step 4: Coat the paste obtained in Step 3 on the bottom surface of the ceramic ware through screen printing, brushing, or spraying processes, and then bake it to obtain a magnetic and heat conductive film coating on the bottom surface of the ceramic ware.

[0068] The mesh number of the sieve in the sieving process in Step 1 is 80 meshes, and the mesh number of the sieve in the sieving process in Step 3 is 250 meshes.

[0069] The temperature of the melting process in Step 1 is 1040 °C.

[0070] In the classification ball milling process in Step 1, first dry mill to a particle size of 20 μm, and then wet mill to a particle size of 3 μm.

[0071] The temperature of the baking in Step 4 is 780 °C, and the time is 5 h.

[0072] The thickness of the magnetic and heat conductive film coating obtained in Step 4 is 70 μm.

[0073] The heating power of the magnetic and heat conductive film coating obtained in Step 4 is 1902 W, the heating efficiency is 90.6%, the thermal expansion coefficient is 5.1×10 -6 / °C, and the adhesion is grade 0.

[0074] Description of the detection methods for Examples 1-6: 1) The thermal expansion coefficient is tested with a CSI-771 thermal expansion coefficient measuring instrument. 2) The adhesion is measured with a cross cutter. 3) The heating efficiency is the ratio of the output power to the input power × 100%, and the input power is the maximum power of 2100 W on the electromagnetic induction furnace. 4) The heating power is detected through a power meter.

[0075] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the principle and spirit of the present invention are all included in the protection scope of the present invention.

Claims

1. An aqueous environmentally friendly magnetic and heat-conducting paste, characterized in that: The weight percentage composition of the raw material formula is as follows: elemental silver 1-75 wt%, elemental titanium 1-75 wt%, elemental sulfur 0.5-1.5 wt%, magnesium carbonate 0.1-0.3 wt%, boric acid 0.2-0.5 wt%, quartz 0.5-1 wt%, titanium dioxide 0.1-0.3 wt%, aluminum hydroxide 0.1-0.2 wt%, bismuth oxide 0.3-0.5 wt%, vanadium pentoxide 1-2 wt%, niobium oxide 0.05-0.1 wt%, acrylic resin 4-8 wt%, triethylene glycol monobutyl ether 12-17 wt%, cetyl alcohol polyoxyethylene ether 0.5-1 wt%.

2. The application method of the water-based environment-friendly magnetic and heat-conducting paste according to claim 1, characterized in that It includes the following steps: Step 1: Weigh magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide according to the weight percentages in the raw material formula, and obtain a glass binder through dry ball milling, screening, melting, air cooling, classification ball milling, drying, and air jet pulverization. Step 2: Weigh acrylic resin, triethylene glycol monobutyl ether, and cetyl alcohol polyoxyethylene ether according to the weight percentages in the raw material formula and mix them evenly to obtain a binder. Step 3: Weigh elemental silver, elemental titanium, and elemental sulfur according to the weight percentages in the raw material formula, mix them with the glass binder prepared in Step 1 and the binder prepared in Step 2, and obtain a water-based environmentally friendly magnetic and heat conductive slurry through stirring dispersion, sand grinding dispersion, and screening. Step 4: Coat the slurry prepared in Step 3 on the bottom surface of glass or ceramics through screen printing, brushing, or spraying processes and bake it, or directly coat it on the bottom surface of glass or ceramics through the thermal spraying process to obtain a magnetic and heat conductive film coating on the bottom surface of glass or ceramics.

3. The application method according to claim 2, characterized in that: The mesh number of the sieve in the screening process of Step 1 is 80 mesh, and the mesh number of the sieve in the screening process of Step 3 is 250 mesh.

4. The application method according to claim 2, wherein: The temperature of the melting process in Step 1 is 1000-1050 °C.

5. The application method according to claim 2, wherein: In the classification ball milling process of Step 1, first dry mill to a particle size ≤ 20 μm, and then wet mill to a particle size of 1-3 μm.

6. The application method according to claim 2, wherein: The temperature of baking or thermal spraying in Step 4 is 600-800 °C, and the time is 4.5-5.5 h.

7. The application method according to claim 2, wherein: The thickness of the magnetic and heat conductive film coating prepared in Step 4 is 40-70 μm.

8. The application method according to claim 2, characterized in that: The heating power of the magnetic and heat conductive film coating prepared in the fourth step is 1785-2000W, the heating efficiency is ≥85%, and the coefficient of thermal expansion is 4.6-5.8×10 -6 / °C.

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