A water-based environmentally friendly magnetic and thermal conductive slurry and its application method

Abstract

The present invention discloses a water-based, environmentally friendly, magnetically conductive and thermally conductive slurry and an application method thereof. The raw material formula comprises, by weight percentage, 1-75wt% of silver, 1-75wt% of titanium, 0.5-1.5wt% of sulfur, 0.1-0.3wt% of magnesium carbonate, 0.2-0.5wt% of boric acid, 0.5-1wt% of quartz, 0.1-0.3wt% of titanium dioxide, 0.1-0.2wt% of aluminum hydroxide, 0.3-0.5wt% of bismuth oxide, 1-2wt% of vanadium pentoxide, 0.05-0.1wt% of niobium oxide, 4-8wt% of acrylic resin, 12-17wt% of triethylene glycol monobutyl ether, and 0.5-1wt% of hexadecanol polyoxyethylene ether. The slurry is applied to the bottom surface of glass or ceramic at high temperature to form a magnetically conductive and thermally conductive film coating, which can effectively improve the heating efficiency of the ceramic or glass, and therefore has broad market prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of glass or ceramics, and in particular to an aqueous environment-friendly magnetic and thermal conductive slurry and an application method thereof. Background Art

[0002] Induction cookers heat food using the physical principle of electromagnetic induction. When the electromagnetic induction coil is energized, it generates a strong magnetic field. When this magnetic field passes through a pot placed on the induction cooker, which is sensitive to the magnetic field lines, eddy currents are generated in the pot. These eddy currents generate heat, heating the pot and transferring the heat to the food. Induction cookers are widely used in modern kitchens due to their fast heating speed and high efficiency. However, since the magnetic heating materials used in induction cookers can only be iron or graphite, ceramic and glass materials cannot generate eddy currents. Therefore, if ceramic or glassware is used, the bottom of the ceramic or glass cooker must be coated with a metal or other magnetic and thermally conductive slurry to make it suitable for use on an induction cooker. Some methods coat the bottom of glass or ceramic with an iron layer, but due to its high thermal expansion coefficient, it is incompatible with glass or ceramic and easily peels off after a period of use. Other methods directly coat the bottom of glass or ceramic with silver to achieve induction heating. However, a major drawback of this method is that it easily oxidizes over time, causing the electromagnetic induction heating film to significantly lose power and eventually cease functioning. 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 thermally conductive slurry having 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 solution: a water-based environmentally friendly magnetic and thermal conductive slurry, characterized in that the weight percentage of the raw material formula is: 1-75wt% of silver element, 1-75wt% of titanium element, 0.5-1.5wt% of sulfur element, 0.1-0.3wt% of magnesium carbonate, 0.2-0.5wt% of boric acid, 0.5-1wt% of quartz, 0.1-0.3wt% of titanium dioxide, 0.1-0.2wt% of aluminum hydroxide, 0.3-0.5wt% of bismuth oxide, 1-2wt% of vanadium pentoxide, 0.05-0.1wt% of niobium oxide, 4-8wt% of acrylic resin, 12-17wt% of triethylene glycol monobutyl ether, and 0.5-1wt% of hexadecanol polyoxyethylene ether.

[0005] The method for applying the above-mentioned water-based environmentally friendly magnetic and thermal conductive slurry is characterized by comprising the following steps:

[0006] Step 1: Magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide are weighed according to the weight percentage of the raw material formula, and the mixture is dry-milled, sieved, melted, air-cooled, graded ball-milled, dried, and air-powdered to obtain a glass binder;

[0007] Step 2: Weigh acrylic resin, triethylene glycol monobutyl ether, and hexadecanol polyoxyethylene ether according to the weight percentage of the raw material formula and mix them evenly to obtain a linker;

[0008] Step 3: Weighing silver, titanium, and sulfur according to the weight percentage of the raw material formula, mixing with the glass binder prepared in step 1 and the connector prepared in step 2, stirring and dispersing, sand milling, and sieving to obtain a water-based environmentally friendly magnetic and thermal conductive slurry;

[0009] Step 4: Apply the slurry obtained in step 3 to the bottom surface of the glass or ceramic by screen printing, brushing, or spraying and then bake it, or directly apply it to the bottom surface of the glass or ceramic by spraying to obtain a magnetic and thermal conductive film coating on the bottom surface of the glass or ceramic.

[0010] The mesh number of the sieve in the sieving process in step 1 is 80 mesh, and the mesh number of the sieve in the sieving process in step 3 is 250 mesh.

[0011] The temperature of the melting process in step 1 is 1000-1050°C.

[0012] The graded ball milling process in step 1 is first dry grinding to a particle size of ≤20 μm, and then wet grinding to a particle size of 1 to 3 μm.

[0013] The temperature of the baking or spraying in the step 4 is 600-800° C. and the time is 4.5-5.5 hours.

[0014] The thickness of the magnetic and thermal conductive film coating obtained in step 4 is 40 to 70 μm.

[0015] The heating power of the magnetic and thermal conductive film coating prepared in step 4 is 1785-2000W, the heating efficiency is ≥85%, and the thermal expansion coefficient is 4.6-5.8×10 -6 / ℃.

[0016] The slurry can firmly bond the metal powder layer to the bottom surface of ceramic or glass through the glass binder at high temperature, thereby playing the role of electromagnetic induction heating ceramic or glassware. By introducing the reducing agent sulfur to prevent the oxidation of the metal, it will not increase the resistance of the metal layer, thereby effectively improving and maintaining the heating power and efficiency, thereby promoting the technological progress and development of the electromagnetic induction furnace magnetic heating material industry.

[0017] The present invention has the following beneficial effects:

[0018] (1) The water-based environmentally friendly magnetic and thermal conductive slurry of the present invention is water-soluble and environmentally friendly.

[0019] (2) The thermal expansion coefficient of the water-based environmentally friendly magnetic and thermal conductive slurry after sintering is adapted to the substrate, and the thermal expansion coefficient is ≤5.8×10 -6 / ℃, can firmly bond with ceramics or glass, has good adhesion performance and is not easy to scratch.

[0020] (3) The water-based environmentally friendly magnetic and thermal conductive slurry of the present invention can maintain stable heating power and efficiency.

[0021] (4) The application method of the present invention has simple process, low production cost, high production efficiency, low production energy consumption, economy and environmental protection, can well meet the actual production and application needs of enterprises, and has broad market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the SEM test result of the magnetic and thermal conductive film coating prepared in Example 3;

[0023] Figure 2 This is the mapping test result of the magnetic and thermal conductive film coating prepared in Example 3. DETAILED DESCRIPTION

[0024] In order to further illustrate the present invention and the technical means and effects adopted to achieve the predetermined purpose of the invention, the present invention is described in detail below in conjunction with preferred embodiments.

[0025] Example 1

[0026] A water-based, environment-friendly, magnetically conductive and thermally conductive slurry, characterized in that the raw material formula comprises the following weight percentages: 1 wt% of silver, 74.3 wt% of titanium, 0.5 wt% of sulfur, 0.2 wt% of magnesium carbonate, 0.2 wt% of boric acid, 0.5 wt% of quartz, 0.1 wt% of titanium dioxide, 0.1 wt% of aluminum hydroxide, 0.5 wt% of bismuth oxide, 1 wt% of vanadium pentoxide, 0.1 wt% of niobium oxide, 4 wt% of acrylic resin, 17 wt% of triethylene glycol monobutyl ether, and 0.5 wt% of hexadecanol polyoxyethylene ether.

[0027] The method for applying the above-mentioned water-based environmentally friendly magnetic and thermal conductive slurry is characterized by comprising the following steps:

[0028] Step 1: Magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide are weighed according to the weight percentage of the raw material formula, and the mixture is dry-milled, sieved, melted, air-cooled, graded ball-milled, dried, and air-powdered to obtain a glass binder;

[0029] Step 2: Weigh acrylic resin, triethylene glycol monobutyl ether, and hexadecanol polyoxyethylene ether according to the weight percentage of the raw material formula and mix them evenly to obtain a linker;

[0030] Step 3: Weighing silver, titanium, and sulfur according to the weight percentage of the raw material formula, mixing with the glass binder prepared in step 1 and the connector prepared in step 2, stirring and dispersing, sand milling, and sieving to obtain a water-based environmentally friendly magnetic and thermal conductive slurry;

[0031] Step 4: directly coating the slurry obtained in step 3 onto the bottom surface of the ceramic by a spraying process to obtain a magnetic and thermal conductive film coating on the bottom surface of the ceramic.

[0032] The mesh number of the sieve in the sieving process in step 1 is 80 mesh, and the mesh number of the sieve in the sieving process in step 3 is 250 mesh.

[0033] The temperature of the melting process in step 1 is 1000°C.

[0034] The graded ball milling process in step 1 is first dry grinding to a particle size of 16 μm, and then wet grinding to a particle size of 3 μm.

[0035] The temperature of the spraying in step 4 is 800° C. and the time is 4.5 h.

[0036] The thickness of the magnetic and thermal conductive film coating obtained in step 4 is 40 μm.

[0037] The heating power of the magnetic and thermal conductive film coating prepared in step 4 is 1785W, the heating efficiency is 85%, and the thermal expansion coefficient is 4.6×10 -6 / ℃, adhesion is level 0.

[0038] Example 2

[0039] A water-based, environment-friendly, magnetically conductive and thermally conductive slurry, characterized in that the raw material formula comprises the following weight percentages: 1 wt% silver, 73.6 wt% titanium, 1.5 wt% sulfur, 0.2 wt% magnesium carbonate, 0.4 wt% boric acid, 0.5 wt% quartz, 0.1 wt% titanium dioxide, 0.15 wt% aluminum hydroxide, 0.4 wt% bismuth oxide, 1.5 wt% vanadium pentoxide, 0.05 wt% niobium oxide, 5 wt% acrylic resin, 15 wt% triethylene glycol monobutyl ether, and 0.6 wt% hexadecanol polyoxyethylene ether.

[0040] The method for applying the above-mentioned water-based environmentally friendly magnetic and thermal conductive slurry is characterized by comprising the following steps:

[0041] Step 1: Magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide are weighed according to the weight percentage of the raw material formula, and the mixture is dry-milled, sieved, melted, air-cooled, graded ball-milled, dried, and air-powdered to obtain a glass binder;

[0042] Step 2: Weigh acrylic resin, triethylene glycol monobutyl ether, and hexadecanol polyoxyethylene ether according to the weight percentage of the raw material formula and mix them evenly to obtain a linker;

[0043] Step 3: Weighing silver, titanium, and sulfur according to the weight percentage of the raw material formula, mixing with the glass binder prepared in step 1 and the connector prepared in step 2, stirring and dispersing, sand milling, and sieving to obtain a water-based environmentally friendly magnetic and thermal conductive slurry;

[0044] Step 4: directly coating the slurry obtained in step 3 onto the bottom surface of the glass through a spraying process to obtain a magnetic and thermal conductive film coating on the bottom surface of the glass.

[0045] The mesh number of the sieve in the sieving process in step 1 is 80 mesh, and the mesh number of the sieve in the sieving process in step 3 is 250 mesh.

[0046] The temperature of the melting process in step 1 is 1050°C.

[0047] The graded ball milling process in step 1 is first dry grinding to a particle size of 12 μm, and then wet grinding to a particle size of 2 μm.

[0048] The temperature of the spraying in step 4 is 720° C. and the time is 4.5 h.

[0049] The thickness of the magnetic and thermal conductive film coating obtained in step 4 is 70 μm.

[0050] The heating power of the magnetic and thermal conductive film coating prepared in step 4 is 1900W, the heating efficiency is 90.5%, and the thermal expansion coefficient is 5.2×10 -6 / ℃, adhesion is level 0.

[0051] Example 3

[0052] A water-based, environment-friendly, magnetically conductive and thermally conductive slurry, characterized in that the raw material formula is composed of the following weight percentages: 72.75wt% of silver, 1wt% of titanium, 1wt% of sulfur, 0.3wt% of magnesium carbonate, 0.4wt% of boric acid, 1wt% of quartz, 0.3wt% of titanium dioxide, 0.1wt% of aluminum hydroxide, 0.3wt% of bismuth oxide, 2wt% of vanadium pentoxide, 0.05wt% of niobium oxide, 6wt% of acrylic resin, 14wt% of triethylene glycol monobutyl ether, and 0.8wt% of hexadecanol polyoxyethylene ether.

[0053] The method for applying the above-mentioned water-based environmentally friendly magnetic and thermal conductive slurry is characterized by comprising the following steps:

[0054] Step 1: Magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide are weighed according to the weight percentage of the raw material formula, and the mixture is dry-milled, sieved, melted, air-cooled, graded ball-milled, dried, and air-powdered to obtain a glass binder;

[0055] Step 2: Weigh acrylic resin, triethylene glycol monobutyl ether, and hexadecanol polyoxyethylene ether according to the weight percentage of the raw material formula and mix them evenly to obtain a linker;

[0056] Step 3: Weighing silver, titanium, and sulfur according to the weight percentage of the raw material formula, mixing with the glass binder prepared in step 1 and the connector prepared in step 2, stirring and dispersing, sand milling, and sieving to obtain a water-based environmentally friendly magnetic and thermal conductive slurry;

[0057] Step 4: Apply the slurry obtained in step 3 to the bottom surface of the glass by screen printing, brushing, or spraying, and then bake it to obtain a magnetic and thermal conductive film coating on the bottom surface of the glass.

[0058] The mesh number of the sieve in the sieving process in step 1 is 80 mesh, and the mesh number of the sieve in the sieving process in step 3 is 250 mesh.

[0059] The temperature of the melting process in step 1 is 1030°C.

[0060] The graded ball milling process in step 1 is first dry grinding to a particle size of 12 μm, and then wet grinding to a particle size of 1 μm.

[0061] The temperature of the roasting in step 4 is 660° C. and the time is 4.5 hours.

[0062] The thickness of the magnetic and thermal conductive film coating obtained in step 4 is 65 μm.

[0063] The heating power of the magnetic and thermal conductive film coating prepared in step 4 is 2000W, the heating efficiency is 95.2%, and the thermal expansion coefficient is 4.8×10 -6 / ℃, adhesion is level 0.

[0064] like Figure 1 and Figure 2 As shown, the magnetic and thermally conductive film coating produced in this embodiment consists of a metal layer and an adhesive layer. The metal layer is the outer layer, and the adhesive is the inner layer. The adhesive layer penetrates through the metal layer to the glass surface, thereby contacting the glass surface. This not only ensures a strong bond between the metal layer and the glass, but also does not increase the resistance of the metal layer, effectively improving heating efficiency.

[0065] Example 4

[0066] A water-based, environment-friendly, magnetically conductive and thermally conductive slurry, characterized in that the raw material formula is composed of the following weight percentages: 75wt% of silver, 2.74wt% of titanium, 1.5wt% of sulfur, 0.1wt% of magnesium carbonate, 0.3wt% of boric acid, 0.8wt% of quartz, 0.3wt% of titanium dioxide, 0.18wt% of aluminum hydroxide, 0.5wt% of bismuth oxide, 1.5wt% of vanadium pentoxide, 0.08wt% of niobium oxide, 4wt% of acrylic resin, 12wt% of triethylene glycol monobutyl ether, and 1wt% of hexadecanol polyoxyethylene ether.

[0067] The method for applying the above-mentioned water-based environmentally friendly magnetic and thermal conductive slurry is characterized by comprising the following steps:

[0068] Step 1: Magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide are weighed according to the weight percentage of the raw material formula, and the mixture is dry-milled, sieved, melted, air-cooled, graded ball-milled, dried, and air-powdered to obtain a glass binder;

[0069] Step 2: Weigh acrylic resin, triethylene glycol monobutyl ether, and hexadecanol polyoxyethylene ether according to the weight percentage of the raw material formula and mix them evenly to obtain a linker;

[0070] Step 3: Weighing silver, titanium, and sulfur according to the weight percentage of the raw material formula, mixing with the glass binder prepared in step 1 and the connector prepared in step 2, stirring and dispersing, sand milling, and sieving to obtain a water-based environmentally friendly magnetic and thermal conductive slurry;

[0071] Step 4: Apply the slurry obtained in step 3 to the bottom surface of the ceramic by screen printing, brushing, or spraying, and then bake it to obtain a magnetic and thermal conductive film coating on the bottom surface of the ceramic.

[0072] The mesh number of the sieve in the sieving process in step 1 is 80 mesh, and the mesh number of the sieve in the sieving process in step 3 is 250 mesh.

[0073] The temperature of the melting process in step 1 is 1050°C.

[0074] The graded ball milling process in step 1 is first dry grinding to a particle size of 10 μm, and then wet grinding to a particle size of 1 μm.

[0075] The temperature of the roasting in step 4 is 650° C. and the time is 5.5 h.

[0076] The thickness of the magnetic and thermal conductive film coating obtained in step 4 is 60 μm.

[0077] The heating power of the magnetic and thermal conductive film coating prepared in step 4 is 1788W, the heating efficiency is 85.1%, and the thermal expansion coefficient is 5.5×10 -6 / ℃, adhesion is level 0.

[0078] Example 5

[0079] A water-based, environment-friendly, magnetically conductive and thermally conductive slurry, characterized in that the raw material formula comprises the following weight percentages: 2.55wt% of silver, 75wt% of titanium, 0.5wt% of sulfur, 0.2wt% of magnesium carbonate, 0.5wt% of boric acid, 1wt% of quartz, 0.2wt% of titanium dioxide, 0.2wt% of aluminum hydroxide, 0.4wt% of bismuth oxide, 1.8wt% of vanadium pentoxide, 0.05wt% of niobium oxide, 5wt% of acrylic resin, 12wt% of triethylene glycol monobutyl ether, and 0.6wt% of hexadecanol polyoxyethylene ether.

[0080] The method for applying the above-mentioned water-based environmentally friendly magnetic and thermal conductive slurry is characterized by comprising the following steps:

[0081] Step 1: Magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide are weighed according to the weight percentage of the raw material formula, and the mixture is dry-milled, sieved, melted, air-cooled, graded ball-milled, dried, and air-powdered to obtain a glass binder;

[0082] Step 2: Weigh acrylic resin, triethylene glycol monobutyl ether, and hexadecanol polyoxyethylene ether according to the weight percentage of the raw material formula and mix them evenly to obtain a linker;

[0083] Step 3: Weighing silver, titanium, and sulfur according to the weight percentage of the raw material formula, mixing with the glass binder prepared in step 1 and the connector prepared in step 2, stirring and dispersing, sand milling, and sieving to obtain a water-based environmentally friendly magnetic and thermal conductive slurry;

[0084] Step 4: directly coating the slurry obtained in step 3 onto the bottom surface of the ceramic by a spraying process to obtain a magnetic and thermal conductive film coating on the bottom surface of the ceramic.

[0085] The mesh number of the sieve in the sieving process in step 1 is 80 mesh, and the mesh number of the sieve in the sieving process in step 3 is 250 mesh.

[0086] The temperature of the melting process in step 1 is 1010°C.

[0087] The graded ball milling process in step 1 is first dry grinding to a particle size of 9 μm, and then wet grinding to a particle size of 2 μm.

[0088] The temperature of the spraying in step 4 is 600° C. and the time is 5 hours.

[0089] The thickness of the magnetic and thermal conductive film coating obtained in step 4 is 68 μm.

[0090] The heating power of the magnetic and thermal conductive film coating prepared in step 4 is 1854W, the heating efficiency is 88.2%, and the thermal expansion coefficient is 5.8×10 -6 / ℃, adhesion is level 0.

[0091] Example 6

[0092] A water-based, environment-friendly, magnetically conductive and thermally conductive slurry, characterized in that the raw material formula is composed of the following weight percentages: 38.8wt% of silver, 35.8wt% of titanium, 1wt% of sulfur, 0.3wt% of magnesium carbonate, 0.5wt% of boric acid, 0.7wt% of quartz, 0.2wt% of titanium dioxide, 0.2wt% of aluminum hydroxide, 0.5wt% of bismuth oxide, 1.2wt% of vanadium pentoxide, 0.1wt% of niobium oxide, 8wt% of acrylic resin, 12wt% of triethylene glycol monobutyl ether, and 0.7wt% of hexadecanol polyoxyethylene ether.

[0093] The method for applying the above-mentioned water-based environmentally friendly magnetic and thermal conductive slurry is characterized by comprising the following steps:

[0094] Step 1: Magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide are weighed according to the weight percentage of the raw material formula, and the mixture is dry-milled, sieved, melted, air-cooled, graded ball-milled, dried, and air-powdered to obtain a glass binder;

[0095] Step 2: Weigh acrylic resin, triethylene glycol monobutyl ether, and hexadecanol polyoxyethylene ether according to the weight percentage of the raw material formula and mix them evenly to obtain a linker;

[0096] Step 3: Weighing silver, titanium, and sulfur according to the weight percentage of the raw material formula, mixing with the glass binder prepared in step 1 and the connector prepared in step 2, stirring and dispersing, sand milling, and sieving to obtain a water-based environmentally friendly magnetic and thermal conductive slurry;

[0097] Step 4: Apply the slurry obtained in step 3 to the bottom surface of the ceramic by screen printing, brushing, or spraying, and then bake it to obtain a magnetic and thermal conductive film coating on the bottom surface of the ceramic.

[0098] The mesh number of the sieve in the sieving process in step 1 is 80 mesh, and the mesh number of the sieve in the sieving process in step 3 is 250 mesh.

[0099] The temperature of the melting process in step 1 is 1040°C.

[0100] The graded ball milling process in step 1 is first dry grinding to a particle size of 20 μm, and then wet grinding to a particle size of 3 μm.

[0101] The temperature of the roasting in step 4 is 780° C. and the time is 5 hours.

[0102] The thickness of the magnetic and thermal conductive film coating obtained in step 4 is 70 μm.

[0103] The heating power of the magnetic and thermal conductive film coating prepared in step 4 is 1902W, the heating efficiency is 90.6%, and the thermal expansion coefficient is 5.1×10 -6 / ℃, adhesion is level 0.

[0104] Example 1-6 Detection Method Description:

[0105] 1) The thermal expansion coefficient is tested using a CSI-771 thermal expansion coefficient tester;

[0106] 2) Adhesion is measured with a grid knife;

[0107] 3) Heating efficiency is the ratio of output power to input power × 100%, where the maximum input power on an electromagnetic induction furnace is 2100W;

[0108] 4) The heating power is tested by a power meter.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the principles and spirit of the present invention are included in the scope of protection of the present invention.

Claims

1. A water-based environmentally friendly magnetic and thermal conductive slurry, characterized by: The weight percentage composition of the raw material formula is: 1-75wt% of silver element, 1-75wt% of titanium element, 0.5-1.5wt% of sulfur element, 0.1-0.3wt% of magnesium carbonate, 0.2-0.5wt% of boric acid, 0.5-1wt% of quartz, 0.1-0.3wt% of titanium dioxide, 0.1-0.2wt% of aluminum hydroxide, 0.3-0.5wt% of bismuth oxide, 1-2wt% of vanadium pentoxide, 0.05-0.1wt% of niobium oxide, 4-8wt% of acrylic resin, 12-17wt% of triethylene glycol monobutyl ether, and 0.5-1wt% of hexadecanol polyoxyethylene ether. The application method of the water-based environmentally friendly magnetic and thermal conductive slurry comprises the following steps: Step 1: Magnesium carbonate, boric acid, quartz, titanium dioxide, aluminum hydroxide, bismuth oxide, vanadium pentoxide, and niobium oxide are weighed according to the weight percentage of the raw material formula, and the mixture is dry-milled, sieved, melted, air-cooled, graded ball-milled, dried, and air-powdered to obtain a glass binder; Step 2: Weigh acrylic resin, triethylene glycol monobutyl ether, and hexadecanol polyoxyethylene ether according to the weight percentage of the raw material formula and mix them evenly to obtain a linker; Step 3: Weighing silver, titanium, and sulfur according to the weight percentage of the raw material formula, mixing with the glass binder prepared in step 1 and the connector prepared in step 2, stirring and dispersing, sand milling, and sieving to obtain a water-based environmentally friendly magnetic and thermal conductive slurry; Step 4: Apply the slurry obtained in step 3 to the bottom surface of the glass or ceramic by screen printing, brushing, or spraying and then bake it, or directly apply it to the bottom surface of the glass or ceramic by spraying to obtain a magnetic and thermal conductive film coating on the bottom surface of the glass or ceramic.

2. The water-based environmentally friendly magnetic and thermal conductive slurry according to claim 1, characterized in that: The mesh number of the sieve in the sieving process in step 1 is 80 mesh, and the mesh number of the sieve in the sieving process in step 3 is 250 mesh.

3. The water-based environmentally friendly magnetic and thermal conductive slurry according to claim 1, characterized in that: The temperature of the melting process in step 1 is 1000-1050°C.

4. The water-based environmentally friendly magnetic and thermal conductive slurry according to claim 1, characterized in that: The graded ball milling process in step 1 is first dry grinding to a particle size of ≤20 μm, and then wet grinding to a particle size of 1 to 3 μm.

5. The water-based environmentally friendly magnetic and thermal conductive slurry according to claim 1, characterized in that: The temperature of the baking or spraying in the step 4 is 600-800° C. and the time is 4.5-5.5 hours.

6. The water-based environmentally friendly magnetic and thermal conductive slurry according to claim 1, characterized in that: The thickness of the magnetic and thermal conductive film coating obtained in step 4 is 40 to 70 μm.

7. The water-based environmentally friendly magnetic and thermal conductive slurry according to claim 1, characterized in that: The heating power of the magnetic and thermal conductive film coating prepared in step 4 is 1785-2000W, the heating efficiency is ≥85%, and the thermal expansion coefficient is 4.6-5.8×10 -6 / ℃.

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