Prefabricated material device for synthesizing hexagonal boron nitride

Abstract

The material prefabricating device comprises a balance base, a supporting column, an air pump and an arc-shaped electric heating disc, a machine frame is fixedly installed on the balance base, an inclined face is arranged on one side of the upper end of the machine frame, a rotating rod is installed on the inclined face of the machine frame, and the inner end of the machine frame of the rotating rod is fixedly connected with a variable frequency motor. The outer end of the rack of the rotating rod is fixedly connected with a round bowl. The device is used for preparing a synthesized hexagonal boron nitride precursor to obtain a spherical prefabricated material with multiple layers of mutually-wrapped material bodies, the prefabricated material enables raw material wrapping bodies to be fully and tightly contacted, and raw materials sublimate at high temperature, decompose and participate in chemical reaction in the roasting stage of synthesized hexagonal boron nitride, so that the gas-solid reaction is more sufficient and thorough due to the tight wrapping bodies; the raw material utilization rate is high, the boron nitride synthesis yield is higher, and the obtained boron nitride is a high-quality hexagonal boron nitride product with large sheet diameter, more complete sheet structure and high radius-thickness ratio.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated materials for synthesizing hexagonal boron nitride, in particular to a prefabricated material device for synthesizing hexagonal boron nitride. Background Art

[0002] Hexagonal boron nitride has good thermal conductivity, insulation performance, excellent self-lubricity, and non-wetting properties with a variety of metal hot liquids. It is widely used in high-tech fields such as aerospace, new energy, 3C products, and electronics. In the market, hexagonal boron nitride is mostly synthesized by high-temperature roasting method using boric acid-melamine as raw materials. Usually, a simple dry mixing process is used to mix boric acid particles and melamine powder, and then the temperature is raised and roasted to prepare hexagonal boron nitride. This simple material mixing causes uneven dispersion of material components and loose contact between materials, resulting in melamine thermal sublimation and material volatilization waste in the process of preparing boron nitride precursors, and melamine thermal decomposition materials run away without participating in the reaction and waste, which greatly reduces the effective utilization rate of raw materials. Similarly, the simple physical mixing of boric acid particles is free and discontinuous. Because of the uneven and discontinuous distribution, the hexagonal boron nitride product synthesized in the thermal reaction process has a small sheet diameter, irregular sheet structure, and low diameter-to-thickness ratio, which in turn affects the synthesis yield and quality of hexagonal boron nitride. There is currently no effective solution to the problems in related technologies.

[0003] Therefore, a prefabricated material device for synthesizing hexagonal boron nitride is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a prefabricated material device for synthesizing hexagonal boron nitride, so as to solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0006] A prefabricated material device for synthesizing hexagonal boron nitride, comprising:

[0007] A balancing base, a frame is fixedly installed on the balancing base, an inclined surface is arranged on one side of the upper end of the frame, a rotating rod is installed on the inclined surface of the frame, the rotating rod is perpendicular to the inclined surface of the frame, a variable frequency motor is fixedly installed on the inner end of the inclined surface of the frame, a round bowl is fixedly installed on the outer end of the inclined surface of the frame, the rotating rod is fixedly connected to the rotating shaft of the variable frequency motor at the inner end of the inclined surface of the frame, the rotating rod is fixedly connected to the rotating shaft of the round bowl at the outer end of the inclined surface of the frame, and a plurality of guide strips are fixedly installed on the wall of the round bowl;

[0008] A support column, wherein the support column is fixedly connected to the top of the balance base, and the upper end of the support column is fixedly connected to a pressure-resistant storage box for raw material slurry for synthesizing hexagonal boron nitride, and a partition is provided inside the pressure-resistant storage box for raw material slurry for synthesizing hexagonal boron nitride, and the partition divides the interior of the pressure-resistant storage box for raw material slurry for synthesizing hexagonal boron nitride into two storage areas, the two storage areas are respectively a melamine slurry storage area and a boric acid slurry storage area, and the bottoms of the storage areas are connected to slurry connecting pipes, and valves are installed on the slurry connecting pipes;

[0009] An air pump, the air pump is fixedly installed inside the frame, the air outlet of the air pump is connected to the Y-shaped tube, the two air outlets of the Y-shaped tube are connected to the gas connecting tube, and the air outlet of the gas connecting tube extends into the top of the raw material slurry pressure-resistant storage box for synthesizing hexagonal boron nitride;

[0010] An arc-shaped electric heating plate is installed at the lower end of the round bowl through a height adjustment member.

[0011] In a prefabricated material device for synthesizing hexagonal boron nitride according to the utility model, three guide bars are provided, and the angle between two adjacent guide bars is 120°.

[0012] In a prefabricated material device for synthesizing hexagonal boron nitride according to the utility model, the angle between the inclined surface of the frame and the vertical surface of the frame is 30°.

[0013] In a prefabricated material device for synthesizing hexagonal boron nitride according to the utility model, a fan is fixedly installed inside the balancing base, an air outlet of the fan is connected to an air pipe, and the air outlet of the air pipe extends into the interior of the round bowl.

[0014] In a prefabricated material device for synthesizing hexagonal boron nitride according to the utility model, heat dissipation blades are installed on the rotating rod.

[0015] In a preform device for synthesizing hexagonal boron nitride according to the utility model, the height adjustment member includes a sleeve, the sleeve is placed on the top of the balancing base, an adjustment rod is sleeved inside the upper end of the sleeve, the arc-shaped electric heating plate is fixedly mounted on the top of the adjustment rod, and a handle bolt for tightening the adjustment rod is installed on the sleeve.

[0016] In a prefabricated material device for synthesizing hexagonal boron nitride according to the utility model, a discharge port is opened on the side of the round bowl, a sealing plate is hinged on the discharge port, and one end of the sealing plate is fixed to the round bowl by a handle screw.

[0017] In a prefabricated material device for synthesizing hexagonal boron nitride according to the utility model, a spray nozzle is installed at the discharge port of the slurry connecting pipe.

[0018] In a preform device for synthesizing hexagonal boron nitride according to the utility model, a control panel is fixedly installed on the frame, and a speed regulating knob for controlling the speed of the variable frequency motor, a temperature control knob for adjusting the heating temperature of the arc-shaped electric heating plate, an air pump switch for controlling the start and stop of the air pump, a power switch, and a fan switch for controlling the start and stop of the fan are respectively installed on the control panel.

[0019] In a prefabricated material device for synthesizing hexagonal boron nitride according to the utility model, the sizes of the two spray nozzles are different, and the diameters of the two slurry connecting pipes are different.

[0020] The utility model has at least the following beneficial effects:

[0021] The utility model adopts a variable frequency motor to rotate a round bowl for spheroidization coating granulation. First, part of melamine is dosed into the round bowl as a raw material, and a melamine slurry spraying process is used to roll and form balls in a rolling speed-adjustable round bowl, and dry the balls as the core. Then, boric acid slurry is sprayed on the surface of the melamine balls to wrap and dry the balls for coating. Then, a layer of melamine slurry is sprayed for drying and coating, and then a layer of boric acid slurry is sprayed for drying and coating. The spray drying is repeated three to five times in this way to form a spherical body with multiple layers of raw materials mutually coated as a prefabricated material. The above-mentioned technical problems encountered in the roasting heat reaction process of hexagonal boron nitride synthesis can be perfectly solved, and the raw material utilization rate and product yield, as well as the product quality can be improved, with remarkable effects.

[0022] This device has two components of raw materials, adopts two groups of liquid slurry spray nozzle schemes, and intermittent mutual coating process. According to the different viscosity characteristics of the material slurry, the size of the spray nozzle and the size of the pipeline are configured differently, which is more conducive to the realization of the coating process;

[0023] The inclined surface of the frame is set at an angle of 30 degrees to the vertical surface. Driven by the rotation of the variable frequency motor, the material in the inclined round bowl cavity will form a three-dimensional tumbling, and the tumbling efficiency is higher. The three guide strips set on the side of the round bowl make the powder as far as possible The high point of the round bowl and then slide down, the ball-making efficiency is high;

[0024] The material discharging is convenient through the discharging port arranged on the wall of the round bowl;

[0025] By adding heat dissipation blades on the rotating rod, the heat conduction and heat dissipation of the round bowl are facilitated to prevent the variable frequency motor from being damaged or burned due to excessive temperature;

[0026] Through the fan and air pipe, the material in the round bowl is dried and the water vapor is evaporated, making the coating tighter. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0028] Figure 1 This is a schematic diagram of the structure of a prefabricated material device for synthesizing hexagonal boron nitride according to the utility model;

[0029] Figure 2 It is a structural schematic diagram of a round bowl of the utility model;

[0030] Figure 3 It is a schematic diagram of the partial cross-section structure of the utility model.

[0031] Description of Figure Numbers:

[0032] 1. Balancing base; 2. Frame; 3. Round bowl; 4. Guide strip; 5. Frequency conversion motor; 6. Fan; 7. Arc-shaped electric heating plate; 8. Discharge port; 801. Sealing plate; 802. Handle screw; 9. Air pipe; 10. Air pump; 11. Speed ​​knob; 12. Temperature control knob; 13. Power switch; 14. Cooling blade; 15. Slurry connecting pipe; 1501. Valve; 16. Gas connecting pipe; 17. Support column; 18. Pressure-resistant storage box for raw material slurry used for synthesizing hexagonal boron nitride; 19. Sleeve; 20. Adjustment rod; 21. Handle bolt; 22. Rotating rod; 23. Air pump switch. DETAILED DESCRIPTION

[0033] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0034] Please refer to Figures 1 to 3The present embodiment provides a preform device for synthesizing hexagonal boron nitride, comprising a balancing base 1, a support column 17, an air pump 10 and an arc-shaped electric heating plate 7. A frame 2 is fixedly installed on the balancing base 1. An inclined surface is provided on one side of the upper end of the frame 2. The angle between the inclined surface of the frame 2 and the vertical surface of the frame 2 is 30°. A rotating rod 22 is installed on the inclined surface of the frame 2. The rotating rod 22 is perpendicular to the inclined surface of the frame 2. A variable frequency motor 5 is fixedly installed on the inner end of the inclined surface of the frame 2. A round bowl 3 is fixedly installed on the outer end of the inclined surface of the frame 2. The rotating rod 22 is fixedly connected to the rotating shaft of the variable frequency motor 5 at the inner end of the inclined surface of the frame. The rotating rod 22 is fixedly connected to the rotating shaft of the variable frequency motor 5 at the inner end of the inclined surface of the frame. The outer end is fixedly connected to the rotating shaft of the round bowl 3, and a plurality of guide strips 4 are fixedly installed on the wall of the round bowl 3. In this embodiment, three guide strips 4 are provided, and the angle between two adjacent guide strips 4 is 120°. The support column 17 is fixedly connected to the top of the balance base 1, and the upper end of the support column 17 is fixedly connected to a pressure-resistant storage box 18 for raw material slurry for synthesizing hexagonal boron nitride. The interior of the pressure-resistant storage box 18 for raw material slurry for synthesizing hexagonal boron nitride is provided with a partition, and the partition divides the interior of the pressure-resistant storage box 18 for raw material slurry for synthesizing hexagonal boron nitride into two storage areas, and the two storage areas are respectively melamine slurry and The storage area and the boric acid slurry storage area, the bottom of the storage area is connected with a slurry connecting pipe 15, a valve 1501 is installed on the slurry connecting pipe 15, a spray nozzle is installed at the discharge port of the slurry pipe 15, the sizes of the two spray nozzles are different, the diameters of the two slurry pipes 15 are different, the air pump 10 is fixedly installed inside the frame 2, the air outlet of the air pump 10 is connected to the Y-tube, the two air outlets of the Y-tube are connected with a gas connecting pipe 16, the air outlet of the gas connecting pipe 16 extends into the top of the raw material slurry pressure storage box 18 for synthesizing hexagonal boron nitride, the arc-shaped electric heating plate 7 is installed on the round bowl 3 through a height adjustment member At the lower end, a fan 6 is fixedly installed inside the balanced base 1, and the air outlet of the fan 6 is connected to an air pipe 9, and the air outlet of the air pipe 9 extends into the interior of the round bowl 3. A control panel is fixedly installed on the frame 2, and a speed regulating knob 11 for controlling the speed of the frequency conversion motor 5, a temperature control knob 12 for adjusting the heating temperature of the arc-shaped electric heating plate 7, an air pump switch 23 for controlling the start and stop of the air pump 10, and a power switch 13 for the entire equipment are installed on the control panel. In order to facilitate discharging, a discharging port 8 is opened on the side of the round bowl 3, and a sealing plate 801 is hinged on the discharging port 8, and one end of the sealing plate 801 is fixed to the round bowl 3 by a handle screw 802.

[0035] Working principle: When in use, the variable frequency motor 5 is controlled by the speed knob 11 to drive the round bowl 3 to rotate, and part of the melamine is dosed into the round bowl 3 as a raw material, and the melamine material body is rotated and rolled in the round bowl 3. The air pump 10 is turned on by the air pump switch 23, and then the valve 1501 on the slurry connecting pipe 15 connected with the melamine slurry is opened to perform melamine spraying and ball making, and the arc-shaped electric heating plate 7 and the fan 6 are started to heat and dry the melamine balls, and then the air pump 10 connected with the melamine slurry is closed. The valve 1501 on the slurry connecting pipe 15 connected to the boric acid slurry is opened, and the valve 1501 on the slurry connecting pipe 15 connected to the boric acid slurry is opened to coat the melamine sphere with boric acid, and then the fan 6 and the arc-shaped electric heating plate 7 are started to dry, and the coating and drying are repeated many times in this way, and finally the discharge port 8 is turned off and opened to take out the coating material. In the process of synthesizing boron nitride, the prefabricated material coated many times is roasted and heated to the sublimation point, because the outer layer is wrapped with boric acid and is not easy to volatilize and lose. It is heated again to the decomposition temperature point of melamine, and the ammonia decomposed by melamine participates in the reaction. Similarly, because the outer layer is wrapped in the glassy state of boron oxide, the ammonia is not easy to volatilize and lose, and most of it participates in the reaction process, thereby improving the utilization rate of raw materials and the yield of boron nitride products. In addition, the continuously distributed boric acid wrapped outside is different from the free and chaotic boric acid of the traditional simple mixing process, so that the synthesized boron nitride sheet structure is complete, the sheet diameter is large, and the diameter-thickness ratio is high.

[0036] Specifically, the rotating rod 22 is provided with heat dissipation blades 14. By adding the heat dissipation blades 14 to the rotating rod 22, the heat conduction and heat dissipation of the round bowl 3 are facilitated to prevent the variable frequency motor 5 from being damaged or burned due to excessive temperature.

[0037] Specifically, the height adjustment member includes a sleeve 19, which is placed on the balancing base 1. An adjusting rod 20 is sleeved inside the upper end of the sleeve 19. The arc-shaped electric heating plate 7 is fixedly installed on the top of the adjusting rod 20. A handle bolt 21 for tightening the adjusting rod 20 is installed on the sleeve 19. Through this arrangement, the height and position of the arc-shaped electric heating plate 7 can be easily adjusted.

[0038] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the attached claims described in the utility model.

Claims

1. A prefabricated material device for synthesizing hexagonal boron nitride, characterized in that: include: A balancing base (1), a frame (2) is fixedly mounted on the balancing base (1), an inclined surface is arranged on one side of the upper end of the frame (2), a rotating rod (22) is mounted on the inclined surface of the frame (2), the rotating rod (22) is perpendicular to the inclined surface of the frame (2), a variable frequency motor (5) is fixedly mounted on the inner end of the inclined surface of the frame (2), a round bowl (3) is fixedly mounted on the outer end of the inclined surface of the frame (2), the rotating rod (22) is fixedly connected to the rotating shaft of the variable frequency motor (5) at the inner end of the inclined surface of the frame, the rotating rod (22) is fixedly connected to the rotating shaft of the round bowl (3) at the outer end of the inclined surface of the frame, and a plurality of guide strips (4) are fixedly mounted on the wall of the round bowl (3); A support column (17), wherein the support column (17) is fixedly connected to the top of the balancing base (1), and the upper end of the support column (17) is fixedly connected to a pressure-resistant storage box (18) for raw material slurry for synthesizing hexagonal boron nitride, and a partition is provided inside the pressure-resistant storage box (18) for raw material slurry for synthesizing hexagonal boron nitride, and the partition divides the inside of the pressure-resistant storage box (18) for raw material slurry for synthesizing hexagonal boron nitride into two storage areas, the two storage areas are respectively a melamine slurry storage area and a boric acid slurry storage area, and the bottoms of the storage areas are connected to a slurry connecting pipe (15), and a valve (1501) is installed on the slurry connecting pipe (15); An air pump (10), the air pump (10) is fixedly installed inside the frame (2), the air outlet of the air pump (10) is connected to a Y-shaped pipe, the two air outlets of the Y-shaped pipe are both connected to a gas connecting pipe (16), and the air outlet of the gas connecting pipe (16) extends into the top of the raw material slurry pressure-resistant storage box (18) for synthesizing hexagonal boron nitride; An arc-shaped electric heating plate (7) is installed at the lower end of the round bowl (3) through a height adjustment member.

2. The prefabricated material device for synthesizing hexagonal boron nitride according to claim 1, characterized in that: Three guide bars (4) are provided, and the angle between two adjacent guide bars (4) is 120°.

3. The prefabricated material device for synthesizing hexagonal boron nitride according to claim 2, characterized in that: The included angle between the inclined surface of the frame (2) and the vertical surface of the frame (2) is 30°.

4. The prefabricated material device for synthesizing hexagonal boron nitride according to claim 3, characterized in that: A fan (6) is fixedly installed inside the balancing base (1), and the air outlet of the fan (6) is connected to an air pipe (9), and the air outlet of the air pipe (9) extends into the interior of the round bowl (3).

5. The prefabricated material device for synthesizing hexagonal boron nitride according to claim 1, characterized in that: The rotating rod (22) is provided with heat dissipation blades (14).

6. A prefabricated material device for synthesizing hexagonal boron nitride according to claim 4, characterized in that: The height adjustment member comprises a sleeve (19), the sleeve (19) is placed on the top of the balancing base (1), an adjustment rod (20) is sleeved inside the upper end of the sleeve (19), the arc-shaped electric heating plate (7) is fixedly mounted on the top of the adjustment rod (20), and a handle bolt (21) for tightening the adjustment rod (20) is mounted on the sleeve (19).

7. The prefabricated material device for synthesizing hexagonal boron nitride according to claim 1, characterized in that: A discharge port (8) is provided on the side of the round bowl (3), a sealing plate (801) is hingedly connected to the discharge port (8), and one end of the sealing plate (801) is fixed to the round bowl (3) by a handle screw (802).

8. The prefabricated material device for synthesizing hexagonal boron nitride according to claim 1, characterized in that: A spray nozzle is installed at the outlet of the slurry connecting pipe (15).

9. The prefabricated material device for synthesizing hexagonal boron nitride according to claim 6, characterized in that: A control panel is fixedly mounted on the frame (2), and the control panel is respectively equipped with a speed regulating knob (11) for controlling the rotation speed of the variable frequency motor (5), a temperature control knob (12) for adjusting the heating temperature of the arc-shaped electric heating plate (7), an air pump switch (23) for controlling the start and stop of the air pump (10), a power switch (13), and a fan switch for controlling the start and stop of the fan (6).

10. The prefabricated material device for synthesizing hexagonal boron nitride according to claim 8, characterized in that: The sizes of the two spray nozzles are different, and the diameters of the two slurry connecting pipes (15) are different.

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