A nano-material magnetic field induced growth device with adjustable magnetic field intensity

Abstract

This invention provides a magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength, characterized by having a furnace frame; a magnetic field unit located in the middle of the furnace frame for providing a magnetic field; a heating furnace located on the furnace frame for holding and heating the nanomaterials; and a cooling unit for cooling the upper and lower permanent magnets.

Description

Technical Field

[0001] This invention relates to the field of materials heat treatment technology, specifically to a magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength. Background Technology

[0002] Research has found that magnetically induced orientation of nanomaterials exhibits a stronger magnetic coupling effect. Magnetic field-induced orientation can transfer energy to microscopic matter without contact, causing a series of changes in the orientation, migration, and arrangement of molecules, atoms, colloids, and micro / nanoparticles, leading to their spontaneous aggregation at the microscopic scale to form regular and ordered structures. The process of magnetic field-induced orientation is essentially the result of competition between various interaction forces acting on magnetic particles. One-dimensional, two-dimensional, three-dimensional, and composite ordered structural materials prepared through magnetic field-induced orientation exhibit unique and superior properties in optics, mechanics, and magnetism, showing broad application prospects. Summary of the Invention

[0003] This invention was made to solve the above-mentioned problems. The purpose of this invention is to provide a magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength.

[0004] This invention provides a magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength, characterized by having a furnace frame; a magnetic field unit located in the middle of the furnace frame for providing a magnetic field; a heating furnace located on the furnace frame for holding and heating the nanomaterials; and a cooling unit for cooling the upper and lower permanent magnets.

[0005] The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength provided by the present invention may also have the following features: the magnetic field unit includes an upper permanent magnet, a lower permanent magnet, a magnet fixing assembly, and a moving assembly. The upper and lower permanent magnets each contain multiple small cubic neodymium iron boron permanent magnets, which are separated by baffles made of non-ferromagnetic material. The magnet fixing assembly includes an upper connecting plate, a lower connecting plate, and a vertical connecting plate. The upper connecting plate is fixedly connected to the upper permanent magnet, and the lower connecting plate is fixedly connected to the lower permanent magnet. The vertical connecting plate is detachably connected to the upper connecting plate and the lower connecting plate, respectively. The moving assembly is used to drive the magnet fixing assembly to move, so that the magnetic field unit moves to a predetermined position. At this predetermined position, the nanomaterials in the heating furnace are located within the magnetic field formed by the magnetic field unit.

[0006] The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength provided by the present invention may also have the following features: the moving component includes a lead screw, a moving part, and a driving part. The length direction of the lead screw is perpendicular to the length direction of the heating furnace. The moving part is movably disposed on the lead screw. The driving part is used to drive the moving part to move along the lead screw.

[0007] The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength provided by the present invention may also have the following features: wherein the heating furnace includes a furnace shell, a furnace door, a furnace plug, a vent, and a heating unit, the heating unit is used to heat the heating furnace, the furnace shell has openings on both sides, the furnace shell surrounds to form a furnace chamber, the furnace door is located at the opening and is used to open or close the opening, the furnace plug is located inside the furnace chamber, and the vent is located on the furnace door and is used to introduce protective gas into the furnace chamber.

[0008] The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength provided by the present invention may also have the following features: wherein the heating unit includes a resistance wire and a thermocouple, the resistance wire is set on the upper, lower, front and rear stainless steel plates of the furnace shell, the resistance wire is used to uniformly heat the furnace chamber, and the thermocouple is set on the lower stainless steel plate of the furnace shell, and is used to measure the temperature of the heating furnace.

[0009] The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength provided by the present invention may also include the following features: a material rack, wherein the material rack is used to be placed inside the furnace and includes an upper stainless steel plate and a lower stainless steel plate, the upper stainless steel plate is used to hold nanomaterials, and multiple reinforcing bars are provided in the middle of the upper stainless steel plate and the lower stainless steel plate.

[0010] The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength provided by the present invention may also include: a stainless steel reaction vessel, which is placed inside the furnace to hold the nanomaterials.

[0011] The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength provided by the present invention may also have the following features: wherein the reinforcing rod is fixedly connected to the lower stainless steel plate, and the reinforcing rod is detachably connected to the upper stainless steel plate.

[0012] The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength provided by the present invention may also include the following features: a control cabinet, wherein the control cabinet is provided with a control knob, a voltmeter, an ammeter and a temperature controller, the control knob is used to control the operation of the moving components, the voltmeter is used to display the total voltage of the magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength, the ammeter is used to display the current applied, and the temperature controller includes a display screen and a button, the display screen is used to display the temperature of the heating furnace and the button is used to adjust the power of the resistance wire.

[0013] The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength provided by the present invention may also have the following features: wherein the cooling unit includes a water pump, a water tank and a plastic hose, and the water tank is connected to the upper permanent magnet and the lower permanent magnet respectively through the plastic hose.

[0014] The role and effect of invention

[0015] The magnetic field-induced growth apparatus for nanomaterials with adjustable magnetic field strength according to the present invention includes a furnace frame, a magnetic field unit, a heating furnace, and a cooling unit. The magnetic field unit is located in the middle of the furnace frame and can provide a magnetic field. The heating furnace is located on the furnace frame and can hold and heat the nanomaterials. The cooling unit can cool the upper and lower permanent magnets. Therefore, this apparatus can perform heat treatment on nanomaterials under a magnetic field to induce their growth. Magnetic field-induced orientation can effectively prepare one-dimensional, two-dimensional, three-dimensional, and composite ordered structural materials. Attached Figure Description

[0016] Figure 1 This is a perspective view of the magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength according to the present invention.

[0017] Figure 2 This is a front view of the magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength according to the present invention.

[0018] Figure 3 This is a top view of the magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength according to the present invention. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments, in conjunction with the accompanying drawings, provide a detailed description of the magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength.

[0020] <Example>

[0021] Figure 1 This is a perspective view of the magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength according to the present invention.

[0022] Figure 2 This is a front view of the magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength according to the present invention.

[0023] like Figure 1 , Figure 2 As shown, the magnetic field-induced growth device 100 for nanomaterials with adjustable magnetic field strength is used to heat-treat nanomaterials under a magnetic field and thereby induce their growth. The magnetic field-induced growth device 100 for nanomaterials with adjustable magnetic field strength includes a furnace frame 1, a magnetic field unit 2, a heating furnace 3, a material rack 4, a control cabinet 5, and a cooling unit 6.

[0024] In this embodiment, the furnace frame 1 serves as the overall support, and the magnetic field unit 2 is located in the middle of the furnace frame 1 to provide a magnetic field. The magnetic field unit 2 includes an upper permanent magnet 7, a lower permanent magnet 8, a magnet fixing assembly 9, and a moving assembly 10. Both the upper permanent magnet 7 and the lower permanent magnet 8 contain multiple small cubic neodymium iron boron permanent magnets, which are separated by baffles made of non-ferromagnetic material.

[0025] The magnet fixing assembly 9 includes an upper connecting plate 91, a lower connecting plate 92, and a vertical connecting plate 93. The upper connecting plate 91 is fixedly connected to the upper permanent magnet 7, the lower connecting plate 92 is fixedly connected to the lower permanent magnet 8, and the vertical connecting plate 93 is detachably connected to the upper connecting plate 91 and the lower connecting plate 92 by bolts, thereby allowing the distance between the upper permanent magnet 7 and the lower permanent magnet 8 to be adjusted.

[0026] Figure 3 This is a top view of the magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength according to the present invention.

[0027] like Figure 3 As shown, in this embodiment, the moving component 10 includes a lead screw 101, a moving member, and a driving member (not shown in the figure). The length direction of the lead screw 101 is perpendicular to the length direction of the heating furnace 3. The moving member is movably mounted on the lead screw 101, and the driving member is used to drive the moving member to move along the lead screw. The moving member is connected to the magnet fixing component 9, which can move with the moving member, thereby driving the permanent magnet to move and moving the magnetic field unit 2 to a predetermined position, such as... Figure 3 As shown, at this predetermined position, the nanomaterials in the heating furnace 3 are heated within the magnetic field formed by the magnetic field unit 2.

[0028] like Figure 2 As shown, the heating furnace 3 is mounted on the furnace frame 1 and is used to hold nanomaterials and heat them under the influence of a magnetic field. The heating furnace 3 includes a furnace shell 40, a left furnace door 19, a right furnace door 20, a left furnace plug 17, a right furnace plug 18, a left vent 21, a right vent 22, and a heating unit 50. Openings are provided on both sides of the furnace shell 40, which encloses and forms a furnace chamber 41. The left furnace door 19 and the right furnace door 20 are both located at these openings for opening or closing. The left furnace plug 17 and the right furnace plug 18 are located inside the furnace chamber 41 to improve heat preservation. The left vent 21 is located on the left furnace door 19, and the right vent 22 is located on the right furnace door 20, through which protective gas is introduced into the furnace chamber 41.

[0029] The heating unit 50 includes multiple resistance wires and multiple thermocouples for heating the furnace 3. The resistance wires are respectively arranged on the upper, lower, front, and rear stainless steel plates of the furnace shell 40, allowing for uniform heating of the furnace chamber 41. The thermocouples are arranged on the lower stainless steel plate of the furnace shell 40 for measuring the temperature of the furnace 3. Figure 2 As shown, a first resistance wire 23, a second resistance wire 24, and a third resistance wire 25, as well as a first thermocouple 26, a second thermocouple 27, and a third thermocouple 28 are installed on the lower stainless steel plate of the heating furnace 3. The three sets of resistance wires heat the front, middle, and rear parts of the furnace chamber 41 respectively for heating and heat preservation of the furnace chamber 41. The three sets of thermocouples correspond to the respective resistance wires and are used to measure the real-time temperature inside the furnace chamber 41.

[0030] like Figure 2 As shown, the material rack 4 is placed inside the furnace chamber 41. The material rack 4 includes an upper stainless steel plate 42 and a lower stainless steel plate 43. The upper stainless steel plate 41 is used to hold nanomaterials. Multiple reinforcing rods 44 are provided between the upper stainless steel plate 42 and the lower stainless steel plate 43. The reinforcing rods 44 are fixedly connected to the lower stainless steel plate 43 by welding, and the reinforcing rods 44 are detachably connected to the upper stainless steel plate 42 by nuts, thereby shortening the distance between the upper stainless steel plate 41 and the lower stainless steel plate 42.

[0031] like Figure 2 As shown, the cooling unit 6 is used to cool the magnetic field unit 2. The cooling unit 6 includes a water pump 61, a water tank 62, and a plastic hose 63. The water pump 61 is placed in the water tank 62, with the water level above the water pump 61. The water tank 62 is connected to the upper permanent magnet 7 and the lower permanent magnet 8 respectively through the plastic hose 63. Cooling water flows through the plastic hose 63 into the outer shells of the upper permanent magnet 7 and the lower permanent magnet 8 in sequence, and finally returns to the water tank 62, forming a closed loop.

[0032] In this embodiment, the control cabinet 5 is equipped with a control knob 11, a voltmeter, an ammeter, and a temperature controller. The meters on the control cabinet 5 are arranged in two rows. The first row is equipped with a voltmeter 35, a first ammeter 29, a second ammeter 30, and a third ammeter 31 in sequence. The second row is equipped with a control knob 11, a first temperature controller 32, a second temperature controller 33, and a third temperature controller 34 in sequence.

[0033] The control knob 11 is used to control the operation of the moving component 10, which can enable the permanent magnet to move in a direction perpendicular to the heating furnace 3, so that the magnetic field unit 2 moves to a predetermined position. At the predetermined position, the nanomaterials in the heating furnace 3 are heated in the magnetic field formed by the magnetic field unit 2.

[0034] Voltmeter 35 is used to display the total voltage of the magnetic field-induced growth device 100 for nanomaterials with adjustable magnetic field strength. First ammeter 29 is used to display the current flowing through the front of the furnace 41, second ammeter 30 is used to display the current flowing through the middle of the furnace 41, and third ammeter 31 is used to display the current flowing through the rear of the furnace 41.

[0035] The first temperature controller 32, the second temperature controller 33, and the third temperature controller 34 all include a display screen and buttons. The first temperature controller 32 is used to regulate the temperature difference at the front of the furnace 41, the second temperature controller 33 is used to regulate the temperature difference in the middle of the furnace 41, and the third temperature controller 34 is used to regulate the temperature difference at the rear of the furnace 41. The buttons are used to adjust the power of the corresponding resistance wires.

[0036] Using nanomaterials as the core of an amorphous nanocrystalline soft magnetic alloy, the core is heat-treated using a magnetic field-induced growth device 100 with adjustable magnetic field strength. The operation process is as follows:

[0037] Step 1: Place the amorphous nanocrystalline soft magnetic alloy core onto the reinforcing rod 44, so that both the upper stainless steel rod 42 and the lower stainless steel rod 43 are in contact with the core. Place the material rack 4 in the center of the furnace chamber 41, place the left furnace plug 17 and the right furnace plug 18, close the left furnace door 19 and the right furnace door 20, and introduce inert gas into the furnace chamber 41 for protection through the left vent 21 and the right vent 22.

[0038] Step 2: Turn on the main power of control cabinet 5, and then turn on the secondary power of the first temperature controller 32, the second temperature controller 33 and the third temperature controller 34 in sequence. Connect the temperature controller to the computer software through the data cable, and set the heating parameters through the computer software, including heating time and holding time. For example, the heating time is 56 minutes and the holding time is 24 hours at 300℃. After setting, run the program and the heating furnace 3 will start heating.

[0039] Step 3: Once the temperature reaches the target temperature, rotate the control knob 11 to control the moving component 10 to move, thereby moving the upper permanent magnet 7 and the lower permanent magnet 8 along a direction perpendicular to the heating furnace 3, so that the magnetic field unit 2 moves to a predetermined position. At this predetermined position, the sample in the heating furnace 3 is heated in the magnetic field formed by the magnetic field unit 2.

[0040] Step 4: After the program finishes running, rotate control knob 11 in the opposite direction. After cooling to room temperature, turn off the power and remove the sample.

[0041] <Variation Example>

[0042] In this modified example, a stainless steel reaction vessel is used to replace the material rack 4 for holding samples. The other structures and functions in this modified example are exactly the same as in the original example, so other structures and functions will not be described in detail.

[0043] The operation process of magnetic field-induced orientation nanocomposite materials is used to illustrate the usage steps of the magnetic field strength adjustable magnetic field-induced growth device 100 for nanomaterials. The usage steps are as follows:

[0044] Step 1: Place the demagnetized stainless steel reactor into the middle of the furnace chamber 41, place the left furnace plug 17 and the right furnace plug 18, and close the left furnace door 19 and the right furnace door 20.

[0045] Step 2: Turn on the main power of control cabinet 5, and then turn on the secondary power of the first temperature controller 32, the second temperature controller 33 and the third temperature controller 34 in sequence. Connect the temperature controller to the computer software through the data cable, and set the heating parameters through the computer software, including heating time and holding time. For example, the heating time is 50 minutes and the holding time is 24 hours at 170℃. After setting, run the program and the heating furnace 3 will start heating.

[0046] Step 3: Once the temperature reaches the target temperature, rotate the control knob 11 to control the moving component 10 to move, thereby moving the upper permanent magnet 7 and the lower permanent magnet 8 along a direction perpendicular to the heating furnace 3, so that the magnetic field unit 2 moves to a predetermined position. At this predetermined position, the sample in the heating furnace 3 is heated in the magnetic field formed by the magnetic field unit 2.

[0047] Step 4: After the program finishes running, remove the magnetic field, wait for it to cool to room temperature, turn off the power, and take out the sample.

[0048] The role and effect of the embodiments

[0049] According to the magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength involved in this embodiment, the device includes a furnace frame, a magnetic field unit, a heating furnace, and a cooling unit. The magnetic field unit is located in the middle of the furnace frame and can provide a magnetic field. The heating furnace is located on the furnace frame and can hold and heat the nanomaterials. The cooling unit can cool the upper and lower permanent magnets. Therefore, this device can perform heat treatment on nanomaterials under a magnetic field to induce their growth. Magnetic field-induced orientation can effectively prepare one-dimensional, two-dimensional, three-dimensional, and composite ordered structural materials.

[0050] In this invention, the distance between the upper and lower permanent magnets can be adjusted by a movable component, thereby achieving adjustable magnetic field strength.

[0051] The furnace door is designed to open or close, and the vent is designed to allow protective gas to be introduced into the furnace.

[0052] The furnace chamber is spacious and can reach a maximum temperature of 600℃, which can meet the heat treatment conditions of most metallic and non-metallic nanomaterials. The bottom plate of the furnace chamber is removable, which facilitates the replacement and maintenance of parts.

[0053] The temperature controller and heating unit comprises three independent subsystems, each controlling and heating the front, middle, and rear sections of the furnace independently. Each subsystem includes a temperature controller, a resistance wire, and a thermocouple. During heating and heat preservation, the three temperature controllers can adjust the heating current in real time based on the temperature difference between the front, middle, and rear sections of the furnace, ensuring that the temperature of the entire furnace remains stable within the predetermined range. This minimizes the impact of ambient temperature on the heat treatment process.

[0054] The material rack is composed of two stainless steel plates placed parallel to each other, connected by longitudinal ribs. When the material rack is located between the upper permanent magnet and the lower permanent magnet, a gap field is generated, which increases the magnetic flux and significantly increases the magnetic field strength.

[0055] Three temperature controllers are installed in parallel in the control cabinet and connected to a computer via a data cable. Heating parameters can be set directly through software, and heating curves, heating time, real-time current, etc. can be displayed, improving the visibility and convenience of the experimental process.

[0056] The cooling unit can cool both the upper and lower permanent magnets.

[0057] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength, used to induce the growth of nanomaterials by heat treatment under a magnetic field, characterized in that, include: Stove frame; A magnetic field unit, located at the middle position of the furnace frame, is used to provide a magnetic field; A heating furnace, mounted on the furnace rack, is used to hold the nanomaterials and to heat the nanomaterials under the influence of the magnetic field; and A cooling unit is used to cool the magnetic field unit. The magnetic field unit includes an upper permanent magnet, a lower permanent magnet, a magnet fixing assembly, and a moving assembly. Both the upper and lower permanent magnets comprise multiple small cubic neodymium iron boron permanent magnets, separated by baffles made of non-ferromagnetic material. The magnet fixing assembly includes an upper connecting plate, a lower connecting plate, and a vertical connecting plate. The upper connecting plate is fixedly connected to the upper permanent magnet, the lower connecting plate is fixedly connected to the lower permanent magnet, and the vertical connecting plate is detachably connected to both the upper and lower connecting plates. The movable component is used to move the magnet fixing component, causing the magnetic field unit to move to a predetermined position. At this predetermined position, the nanomaterials inside the heating furnace are located within the magnetic field formed by the magnetic field unit. The cooling unit includes a water pump, a water tank, and a plastic hose. The water tank is connected to the upper permanent magnet and the lower permanent magnet respectively through the plastic hose.

2. The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength according to claim 1, characterized in that: in, The moving component includes a lead screw, a moving part, and a driving part. The length direction of the lead screw is perpendicular to the length direction of the heating furnace. The moving part is movably mounted on the lead screw. The driving part is used to drive the moving part to move along the lead screw.

3. The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength according to claim 1, characterized in that: in, The heating furnace includes a furnace shell, a furnace door, a furnace plug, a vent, and a heating unit, the heating unit being used to heat the heating furnace. The furnace shell has openings on both sides, and the furnace shell surrounds and forms the furnace chamber. The furnace door is located at the opening and is used to open or close the opening. The furnace plug is installed inside the furnace chamber. The vent is located on the furnace door and is used to introduce protective gas into the furnace chamber.

4. The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength according to claim 3, characterized in that: in, The heating unit includes a resistance wire and a thermocouple. The resistance wire is disposed on the upper, lower, front, and rear stainless steel plates of the furnace shell, and the resistance wire is used to uniformly heat the furnace chamber. The thermocouple is mounted on the lower stainless steel plate of the furnace shell. Used to measure the temperature of the heating furnace.

5. The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength according to claim 3, characterized in that, Also includes: A material rack, used to be placed inside the furnace, comprises an upper stainless steel plate and a lower stainless steel plate. The upper stainless steel plate is used to hold the nanomaterials, and multiple reinforcing bars are provided between the upper and lower stainless steel plates.

6. The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength according to claim 3, characterized in that, Also includes: A stainless steel reactor is used to place the nanomaterials inside the furnace.

7. The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength according to claim 5, characterized in that: in, The reinforcing rod is fixedly connected to the lower stainless steel plate, and the reinforcing rod is detachably connected to the upper stainless steel plate.

8. The magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength according to claim 4, characterized in that, Also includes: The control cabinet is equipped with control knobs, a voltmeter, an ammeter, and a temperature controller. The control knob is used to control the operation of the moving component. The voltmeter is used to display the total voltage of the magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength. The ammeter is used to display the current flowing through it. The temperature controller includes a display screen and buttons. The display screen is used to display the temperature of the heating furnace, and the buttons are used to adjust the power of the resistance wire.

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