Lead-free forward dielectric adjustable antiferroelectric ceramic capacitor and preparation system

Abstract

The invention relates to the technical field of capacitors and preparation systems, and provides a lead-free positive dielectric adjustable antiferroelectric ceramic capacitor and a preparation system, a ceramic body adopts a lead-free raw material, harm is reduced, elements with smaller ion radiuses are doped into bismuth ferrite, a tolerance factor is reduced, the antiferroelectricity of the bismuth ferrite is stabilized, and the anti-ferroelectric performance of the capacitor is improved. The anti-ferroelectric stability of bismuth ferrite is improved, hysteresis is reduced, the anti-ferroelectric stability is improved, the corresponding preparation system of the lead-free forward dielectric adjustable anti-ferroelectric ceramic capacitor can improve the production continuity while forming adaptive production with a ceramic body, and the practicability is further enhanced. The ceramic body comprises a first component, a second component and a third component, the first component is a + 3 valence antiferroelectric stabilizer A, the second component is a paraelectric solid solution component, the third component is Mn3O4 and MnO2, the A is selected from rare earth elements such as Sm, La and Dy, the radius of the rare earth elements is smaller than that of Bi < 3 + >, and the paraelectric solid solution component comprises LnScO3, LnAlO3 and LnGaO3.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitors and preparation systems, and in particular to a lead-free forward dielectric adjustable antiferroelectric ceramic capacitor and a preparation system. Background Art

[0002] It is well known that lead-containing materials can cause harm to the ecological environment and the sustainable development of human society during the preparation, use, recycling and disposal processes. With the increasing demand for environmentally friendly electronic materials, traditional lead-containing antiferroelectric materials are gradually being replaced by lead-free materials. Therefore, lead-free antiferroelectric ceramics have been one of the research hotspots in the field of functional materials in recent years.

[0003] After searching, we found that the patent application number CN202210742998.7 discloses a device for preparing ceramic capacitor slurry, which roughly includes an equipment frame, several batching boxes arranged on the equipment frame, a collection box connected to the output end of the batching box, and a mixing box installed at the output end of the collection box. A stirring component is independently provided in the batching box, and a pumping component is provided in the collection box. The batching boxes are independently connected to the collection box through a feeding conduit. Several driving frames for installing stirring components are provided on the equipment frame, and a linkage component is provided on the driving frame. The driving end of the pumping component drives the stirring component to move synchronously through the linkage component. A mixing conveying component is provided in the mixing box to drive the slurry output. When it is in operation, the various materials are first mixed and prepared, and then mixed uniformly in the mixing box, and the mixed materials are intermittently output to the mixing box in waves in a certain ratio to achieve continuous proportional output.

[0004] It is understood that the current mainstream commercial antiferroelectric capacitors are mainly based on modified lead zirconate (PbZrO3). Although they have good antiferroelectric properties, they contain lead, which is not good for the environment. Mainstream commercial antiferroelectric capacitors contain lead, which causes great pollution to the environment. Although the preparation device of the above-mentioned ceramic capacitor slurry can be applied to the preparation process of the lead-free positive dielectric adjustable antiferroelectric ceramic capacitor, its mixing form is intermittent, so the intermittent production has obviously poor continuity and its practicality needs to be further strengthened. Summary of the Invention

[0005] In response to the deficiencies in the prior art, the present invention provides a lead-free forward dielectric adjustable antiferroelectric ceramic capacitor and a preparation system. The ceramic body thereof adopts lead-free raw materials, which reduces hazards, and elements with smaller ionic radius are doped into bismuth ferrite to reduce the tolerance factor, further dissolve paraelectric materials, stabilize the antiferroelectricity of bismuth ferrite, improve the antiferroelectric stability of bismuth ferrite, reduce hysteresis, and improve the antiferroelectric stability. The corresponding preparation system of the lead-free forward dielectric adjustable antiferroelectric ceramic capacitor can improve production continuity while forming adaptive production with the ceramic body, and its practicality is further enhanced.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a lead-free forward dielectric adjustable antiferroelectric ceramic capacitor, comprising a ceramic body, wherein the ceramic body comprises a first component, a second component and a third component, wherein the first component is a +3 valence antiferroelectric stabilizer A, the second component is a paraelectric solid solution component, and the third component is Mn3O4 and MnO2.

[0007] Preferably, A is selected from rare earth elements such as Sm, La and Dy, which have a radius smaller than Bi3+.

[0008] Preferably, the paraelectric solid solution components include LnScO3, LnAlO3 and LnGaO3.

[0009] The preparation system of lead-free forward dielectric adjustable antiferroelectric ceramic capacitor includes a mixing box and a component feeding structure. The top of the mixing box is connected to a central feeding cylinder. The component feeding structure includes a first rotating frame, a second rotating frame, a third rotating frame, a first fixed frame, a second fixed frame and a third fixed frame. The first rotating frame, the second rotating frame and the third rotating frame are all rotatably connected to the central feeding cylinder. The first rotating frame, the second rotating frame and the third rotating frame are all equipped with servo motors. The three servo motors are respectively used for the rotation control of the first rotating frame, the rotation control of the second rotating frame, and the rotation control of the second rotating frame. Rotation control and rotation control of the third rotating frame, the first fixed frame, the second fixed frame and the third fixed frame are all equipped with magnetic stirring components and magnetic discharge components, the central feeding cylinder is provided with a first feeding port, a second feeding port and a third feeding port, a plurality of first stirring chambers are provided in the first rotating frame, and the plurality of first stirring chambers are matched with the first feeding port, a plurality of second stirring chambers are provided in the second rotating frame, and the plurality of second stirring chambers are matched with the second feeding port, a plurality of third stirring chambers are provided in the third rotating frame, and the plurality of third stirring chambers are matched with the third feeding port.

[0010] Furthermore, the three magnetic stirring assemblies each include a stirring plate, and a plurality of stirring holes are provided on the three stirring plates. Stirring springs are fixedly connected in the first fixed frame, the second fixed frame and the third fixed frame, and the three stirring springs are respectively fixedly connected to the three stirring plates. Stirring permanent magnets are fixedly connected on the three stirring plates, and stirring electromagnets are installed in the first fixed frame, the second fixed frame and the third fixed frame, and the three stirring electromagnets are respectively matched with the three stirring permanent magnets.

[0011] Furthermore, the three magnetic discharge assemblies include a piston body, a piston spring is fixedly connected in the first fixed frame, the second fixed frame and the third fixed frame, the three piston springs are respectively fixedly connected to the three piston bodies, the three piston bodies are respectively fixedly connected to a piston permanent magnet, a piston electromagnet is installed in the first fixed frame, the second fixed frame and the third fixed frame, and the three piston electromagnets are respectively matched with the three piston permanent magnets.

[0012] Furthermore, the first fixing frame, the second fixing frame and the third fixing frame are all provided with a stirring mounting cavity and a piston mounting cavity, the three stirring springs are respectively fixedly connected in the three stirring mounting cavities, the three stirring electromagnets are respectively installed in the three stirring mounting cavities, the three piston springs are respectively fixedly connected in the three piston mounting cavities, and the three piston electromagnets are respectively installed in the three piston mounting cavities.

[0013] Furthermore, the three stirring electromagnets each include a stirring mounting shell, and the three stirring mounting shells are respectively fixedly connected in the three stirring mounting cavities; the three piston electromagnets each include a piston mounting shell, and the three piston mounting shells are respectively fixedly connected in the three piston mounting cavities; conductor columns are fixedly connected in the three stirring mounting shells and the three piston mounting shells, and spiral wires are wound around the six conductor columns.

[0014] Furthermore, an auxiliary frame is fixedly connected to the top of the mixing box, and the first fixed frame, the second fixed frame and the third fixed frame are all fixedly connected to the auxiliary frame. Three motor cavities are opened on the auxiliary frame, and the three servo motors are respectively installed in the three motor cavities. Driving bevel gears are installed on the output shafts of the three servo motors, and the three driving bevel gears are all engaged with driven gear rings. The driven gear rings are respectively fixedly connected to the first rotating frame, the second rotating frame and the third rotating frame.

[0015] Furthermore, the first fixing frame, the second fixing frame and the third fixing frame are all connected with feeding pipes, and the three feeding pipes are respectively used for adding materials to the first stirring chamber, the second stirring chamber and the third stirring chamber.

[0016] Compared with the prior art, the present invention provides a lead-free forward dielectric adjustable antiferroelectric ceramic capacitor and a preparation system, which has the following beneficial effects:

[0017] (1) In the present invention, the core material of the lead-free forward dielectric adjustable antiferroelectric ceramic capacitor is formed by preparing a ceramic body. The use of lead-free raw materials reduces the hazards, and elements with smaller ionic radius are added to bismuth ferrite to reduce the tolerance factor, further dissolve the paraelectric material, stabilize the antiferroelectricity of bismuth ferrite, improve the antiferroelectric stability of bismuth ferrite, reduce hysteresis, and improve the antiferroelectric stability.

[0018] (2) In the present invention, by designing a preparation system for lead-free forward dielectric adjustable antiferroelectric ceramic capacitors, a preparation and mixing device for a ceramic body is formed, which can improve production continuity while adapting to the production of the ceramic body, and the practicality is further enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the three-dimensional structure of the preparation system of the lead-free forward dielectric adjustable antiferroelectric ceramic capacitor of the present invention;

[0020] Figure 2 It is a partially cutaway perspective structural diagram of the mixing box, central feeding cylinder and first rotating frame of the present invention;

[0021] Figure 3 For the present invention Figure 2 Schematic diagram of the local enlarged structure at A in the middle;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the mixing box, central feeding cylinder and auxiliary frame of the present invention;

[0023] Figure 5 Schematic diagram of the three-dimensional structure of the preparation system of the lead-free forward dielectric adjustable antiferroelectric ceramic capacitor of the present invention from another angle;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the mixing box, central feeding cylinder and auxiliary frame of the present invention from another angle;

[0025] Figure 7 It is a schematic three-dimensional structural diagram of the mixing box, the central feeding cylinder and the first rotating frame of the present invention, partially cut away from another angle;

[0026] Figure 8 It is a partially cutaway perspective structural diagram of the cooperation of the first fixing frame, the second fixing frame and the third fixing frame of the present invention;

[0027] Figure 9 For the present invention Figure 8 Schematic diagram of the local enlarged structure at B in the middle;

[0028] Figure 10 For the present invention Figure 8 Schematic diagram of the local enlarged structure at C in the middle;

[0029] Figure 11 It is a partially cutaway perspective structural diagram of the first turret, the second turret, and the third turret of the present invention;

[0030] Figure 12 For the present invention Figure 11Schematic diagram of the local enlarged structure at D in the middle;

[0031] Figure 13 For the present invention Figure 11 Schematic diagram of the local enlarged structure at E in the middle;

[0032] Figure 14 This is a schematic diagram of the exploded three-dimensional structure of the stirring plate, stirring spring and stirring permanent magnet of the present invention;

[0033] Figure 15 It is a bottom-view schematic diagram of the three-dimensional structure of the mixing box, central feeding cylinder and first rotating frame of the present invention;

[0034] Figure 16 1 is a graph showing the corresponding relationship between voltage and dielectric constant between the embodiment of the present invention and the comparative example.

[0035] In the figure: 1. mixing box; 2. central feeding cylinder; 3. first rotating frame; 4. second rotating frame; 5. third rotating frame; 6. first fixed frame; 7. second fixed frame; 8. third fixed frame; 9. servo motor; 10. first feeding port; 11. second feeding port; 12. third feeding port; 13. first stirring chamber; 14. second stirring chamber; 15. third stirring chamber; 16. stirring plate; 17. stirring hole; 18. stirring spring; 19. stirring permanent magnet; 20. piston body; 21. piston spring; 22. piston permanent magnet; 23. stirring mounting chamber; 24. piston mounting chamber; 25. stirring mounting shell; 26. piston mounting shell; 27. conductor column; 28. spiral wire; 29. ​​auxiliary frame; 30. driving bevel gear; 31. driven gear ring; 32. feeding pipe. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Example

[0038] See also Figures 1-16The lead-free forward dielectric adjustable antiferroelectric ceramic capacitor includes a ceramic body, which includes a first component, a second component and a third component. The first component is a +3 valence antiferroelectric stabilizer A, and A is selected from rare earth elements such as Sm, La and Dy, whose radius is smaller than Bi3+. The second component is a paraelectric solid solution component, and the paraelectric solid solution components include LnScO3, LnAlO3 and LnGaO3. The third component is Mn3O4 and MnO2. The core material of the lead-free forward dielectric adjustable antiferroelectric ceramic capacitor is formed through the preparation of the ceramic body. The use of lead-free raw materials reduces the harm, and elements with smaller ionic radius are doped into bismuth ferrite to reduce the tolerance factor, further dissolve the paraelectric material, stabilize the antiferroelectricity of bismuth ferrite, improve the antiferroelectric stability of bismuth ferrite, reduce hysteresis, and improve the antiferroelectric stability.

[0039] The preparation system of the lead-free forward dielectric adjustable antiferroelectric ceramic capacitor includes a mixing box 1 and a component feeding structure. The top of the mixing box 1 is connected to a central feeding cylinder 2. The component feeding structure includes a first rotating frame 3, a second rotating frame 4, a third rotating frame 5, a first fixed frame 6, a second fixed frame 7 and a third fixed frame 8. The first rotating frame 3, the second rotating frame 4 and the third rotating frame 5 are all rotatably connected to the central feeding cylinder 2. The first rotating frame 3, the second rotating frame 4 and the third rotating frame 5 are all equipped with servo motors 9. The three servo motors 9 are respectively used for the rotation control of the first rotating frame 3, the rotation control of the second rotating frame 4 and the rotation control of the third rotating frame 5. The first fixed frame 6, the second fixed frame 7 and the third fixed frame 8 are all rotatably connected to the central feeding cylinder 2. The fixed frames 8 are all equipped with magnetic stirring components and magnetic discharge components. The three magnetic stirring components all include a stirring disk 16. A plurality of stirring holes 17 are provided on the three stirring disks 16. A stirring spring 18 is fixedly connected in the first fixed frame 6, the second fixed frame 7 and the third fixed frame 8. The three stirring springs 18 are respectively fixedly connected to the three stirring disks 16. The three stirring disks 16 are all fixedly connected with a stirring permanent magnet 19. A stirring electromagnet is installed in the first fixed frame 6, the second fixed frame 7 and the third fixed frame 8. The three stirring electromagnets are respectively matched with the three stirring permanent magnets 19 to form a lifting drive of the stirring disk 16 to facilitate stirring. The three magnetic discharge components include a piston body 20. The first fixed frame 6, the second fixed frame 7 and the third fixed frame 8 are all fixedly connected with a stirring spring 18. The three stirring springs 18 are respectively fixedly connected to the three stirring disks 16. The three stirring permanent magnets 19 are respectively matched with the three stirring permanent magnets 19 to form a lifting drive of the stirring disk 16 to facilitate stirring. The fixed frame 6, the second fixed frame 7 and the third fixed frame 8 are all fixedly connected with a piston spring 21, the three piston springs 21 are respectively fixedly connected to the three piston bodies 20, and the three piston bodies 20 are all fixedly connected with a piston permanent magnet 22. The first fixed frame 6, the second fixed frame 7 and the third fixed frame 8 are all installed with a piston electromagnet, and the three piston electromagnets are matched with the three piston permanent magnets 22 to form a lifting drive of the piston body 20 to facilitate the discharge of the materials in the first stirring chamber 13, the second stirring chamber 14 and the third stirring chamber 15. The first fixed frame 6, the second fixed frame 7 and the third fixed frame 8 are all provided with a stirring installation chamber 23 and a piston installation chamber 24. The three stirring springs 18 are respectively fixedly connected to the three In the stirring mounting chamber 23, three stirring electromagnets are respectively installed in the three stirring mounting chambers 23, three piston springs 21 are respectively fixedly connected in the three piston mounting chambers 24, three piston electromagnets are respectively installed in the three piston mounting chambers 24, three stirring electromagnets each include a stirring mounting shell 25, three stirring mounting shells 25 are respectively fixedly connected in the three stirring mounting chambers 23, three piston electromagnets each include a piston mounting shell 26, three piston mounting shells 26 are respectively fixedly connected in the three piston mounting chambers 24, conductor columns 27 are fixedly connected in the three stirring mounting shells 25 and the three piston mounting shells 26, and spiral wires 28 are wound around the six conductor columns 27, using the electromagnetic principle to form a driving force.

[0040] It should be further explained that a first feeding port 10, a second feeding port 11 and a third feeding port 12 are provided on the central feeding cylinder 2, a plurality of first stirring chambers 13 are provided in the first rotating frame 3, and the plurality of first stirring chambers 13 are matched with the first feeding port 10, a plurality of second stirring chambers 14 are provided in the second rotating frame 4, and the plurality of second stirring chambers 14 are matched with the second feeding port 11, a plurality of third stirring chambers 15 are provided in the third rotating frame 5, and the plurality of third stirring chambers 15 are matched with the third feeding port 12. Through the design of the preparation system of the lead-free positive dielectric adjustable antiferroelectric ceramic capacitor, a preparation and mixing device for the ceramic body is formed, which can improve the production continuity while forming an adaptive production with the ceramic body, and the practicality is further enhanced. An auxiliary frame 29 is fixedly connected to the top of the mixing box 1, and the first fixed frame 6, the second fixed frame 7 and the third fixed frame 8 are all fixedly connected to the auxiliary frame 29. Three motor cavities are opened on the auxiliary frame 29, and three servo motors 9 are respectively installed in the three motor cavities. Drive bevel gears 30 are installed on the output shafts of the three servo motors 9. The three drive bevel gears 30 are all engaged with driven gear rings 31. The driven gear rings 31 are respectively fixedly connected to the first rotating frame 3, the second rotating frame 4 and the third rotating frame 5. The first fixed frame 6, the second fixed frame 7 and the third fixed frame 8 are all connected to the feeding pipe 32. The three feeding pipes 32 are respectively used for adding materials to the first stirring chamber 13, the second stirring chamber 14 and the third stirring chamber 15.

[0041] The servo motor 9 in this embodiment is a conventional device purchased on the market and known to those skilled in the art. In the present invention, we only use it and do not improve its structure and function. For those skilled in the art, its setting method, installation method and electrical connection method can be debugged and operated according to the requirements of its instruction manual, and will not be described in detail here.

[0042] In summary, the preparation principle of the lead-free forward dielectric adjustable antiferroelectric ceramic capacitor is to add a first component, that is, a +3 valence antiferroelectric stabilizer A to replace part of Bi to obtain Bi1-xAxFeO3, A can be selected from rare earth elements such as Sm, La, Dy, etc., with a radius smaller than Bi3+, and add a second component, that is, a paraelectric solid solution component, including LnScO3, LnAlO3, LnGaO3, Ln is a rare earth element, and add a third component, such as Mn3O4, MnO2, to balance the valence of Fe and improve the insulation resistance and breakdown voltage of the material. Based on the above content, the following comparative examples and embodiments are formed:

[0043] (1) (Comparative Example) Mn:BiFeO3, the dielectric constant at 1 kV is 176, which is 6.6% of that at zero field;

[0044] (2) (Comparative Example) PLZT, the dielectric constant within 1 kV is 1722, which is 262% of that under zero field;

[0045] (3) (Example 1) 0.9Bi0.9Sm0.1FeO3-0.1LaScO3, the dielectric constant within 1kV is 1627, which is 515% of that under zero field;

[0046] (4) (Example 2) 0.75Bi0.85Dy0.15FeO3-0.25SmAlO3, the dielectric constant within 1kV is 732, which is 197% of that under zero field.

[0047] Furthermore, the method for using the preparation system of the lead-free forward dielectric adjustable antiferroelectric ceramic capacitor is as follows: first, the electrical installation and debugging of the three servo motors 9 are completed, and the three servo motors 9 are operated to realize the rotation drive of the three driving bevel gears 30 respectively, and the rotation of the three driving bevel gears 30 respectively realizes the rotation drive of the three driven gear rings 31, and the rotation of the three driven gear rings 31 respectively realizes the rotation drive of the first rotating frame 3, the rotation drive of the second rotating frame 4 and the rotation drive of the third rotating frame 5. After the debugging is completed, the corresponding material is fed through the feeding pipe 32, as shown in the attached figure. Figure 1As shown, the first component is sequentially fed into the multiple first stirring chambers 13 in the first rotating frame 3, the second component is sequentially fed into the multiple second stirring chambers 14 in the second rotating frame 4, and the third component is sequentially fed into the multiple third stirring chambers 15 in the third rotating frame 5. Taking the first component fed into the first stirring chamber 13 as an example, when the first component is fed into the corresponding first stirring chamber 13, the first rotating frame 3 will be driven to rotate relative to the central feeding cylinder 2, so that the first stirring chamber 13 first rotates to the bottom of the stirring installation chamber 23 and then to the bottom of the piston installation chamber 24. When the first stirring chamber 13 rotates to the bottom of the stirring installation chamber 23, the spiral wire 28 in the stirring electromagnet is energized to connect the stirring electromagnet as a whole with current, so that the stirring electromagnet acts on the stirring permanent magnet 19, so that the stirring disk 16 is pushed downward into the first stirring chamber 13. The stirring body entering the first stirring chamber 13 will stir the first component, and this is accompanied by changes in the current strength and direction of the stirring electromagnet. The change in the relative force between the stirring permanent magnet 19 and the stirring electromagnet is achieved, thereby achieving a change in the depth of the stirring disk 16 entering the first stirring chamber 13, and finally achieving reciprocating stirring of the first component in the first stirring chamber 13. Similarly, when the first stirring chamber 13 rotates to directly below the piston mounting chamber 24, the piston permanent magnet 22 is energized, forming the piston body 20 pressing relative to the first stirring chamber 13, and then the first component in the first stirring chamber 13 is fed into the central feeding barrel 2 through the first feeding port 10, and finally enters the mixing box 1, achieving the addition of the first component relative to the mixing box 1, and accompanied by the staged rotation of the first rotating frame 3, the multiple first stirring chambers 13 are connected in sequence relative to the first feeding port 10, and then the first component is achieved relative to the central feeding barrel 2. Similarly, the multiple second stirring chambers 14 achieve the continuous addition of the second component relative to the central feeding barrel 2, and the multiple third stirring chambers 15 achieve the continuous addition of the third component relative to the central feeding barrel 2.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. Lead-free forward dielectric adjustable antiferroelectric ceramic capacitor, characterized by: The ceramic body comprises a first component, a second component and a third component. The first component is a +3 valence antiferroelectric stabilizer A, the second component is a paraelectric solid solution component, and the third component is Mn3O4 and MnO2.

2. The lead-free forward dielectric adjustable antiferroelectric ceramic capacitor according to claim 1, characterized in that: The A is selected from Sm, La and Dy and is an element whose rare earth radius is smaller than Bi3+.

3. The lead-free forward dielectric adjustable antiferroelectric ceramic capacitor according to claim 2, characterized in that: The paraelectric solid solution components include LnScO3, LnAlO3 and LnGaO3.

4. A preparation system for a lead-free forward dielectric tunable antiferroelectric ceramic capacitor, comprising a mixing box (1), characterized in that: The mixing box (1) further comprises a component feeding structure, wherein the top end of the mixing box (1) is connected to a central feeding cylinder (2), and the component feeding structure comprises a first rotating frame (3), a second rotating frame (4), a third rotating frame (5), a first fixed frame (6), a second fixed frame (7) and a third fixed frame (8), wherein the first rotating frame (3), the second rotating frame (4) and the third rotating frame (5) are all rotatably connected to the central feeding cylinder (2), and the first rotating frame (3), the second rotating frame (4) and the third rotating frame (5) are all equipped with servo motors (9), and the three servo motors (9) are respectively used for the rotation control of the first rotating frame (3), the rotation control of the second rotating frame (4) and the rotation control of the third rotating frame (5). The fixed frame (6), the second fixed frame (7) and the third fixed frame (8) are all equipped with a magnetic stirring assembly and a magnetic discharge assembly. The central feeding cylinder (2) is provided with a first feeding port (10), a second feeding port (11) and a third feeding port (12). The first rotating frame (3) is provided with a plurality of first stirring chambers (13), and the plurality of first stirring chambers (13) are matched with the first feeding port (10). The second rotating frame (4) is provided with a plurality of second stirring chambers (14), and the plurality of second stirring chambers (14) are matched with the second feeding port (11). The third rotating frame (5) is provided with a plurality of third stirring chambers (15), and the plurality of third stirring chambers (15) are matched with the third feeding port (12).

5. The preparation system of the lead-free forward dielectric adjustable antiferroelectric ceramic capacitor according to claim 4, characterized in that: The three magnetic stirring assemblies each include a stirring disk (16), a plurality of stirring holes (17) are provided on the three stirring disks (16), a stirring spring (18) is fixedly connected in the first fixing frame (6), the second fixing frame (7) and the third fixing frame (8), the three stirring springs (18) are respectively fixedly connected to the three stirring disks (16), a stirring permanent magnet (19) is fixedly connected to the three stirring disks (16), a stirring electromagnet is installed in the first fixing frame (6), the second fixing frame (7) and the third fixing frame (8), and the three stirring electromagnets are matched with the three stirring permanent magnets (19) respectively.

6. The preparation system of the lead-free forward dielectric adjustable antiferroelectric ceramic capacitor according to claim 5, characterized in that: The three magnetic discharge assemblies include a piston body (20), a piston spring (21) is fixedly connected in the first fixing frame (6), the second fixing frame (7) and the third fixing frame (8), the three piston springs (21) are fixedly connected to the three piston bodies (20), and the three piston bodies (20) are fixedly connected with a piston permanent magnet (22). The first fixing frame (6), the second fixing frame (7) and the third fixing frame (8) are all installed with a piston electromagnet, and the three piston electromagnets are matched with the three piston permanent magnets (22) respectively.

7. The preparation system of the lead-free forward dielectric adjustable antiferroelectric ceramic capacitor according to claim 6, characterized in that: The first fixing frame (6), the second fixing frame (7) and the third fixing frame (8) are all provided with a stirring installation cavity (23) and a piston installation cavity (24); the three stirring springs (18) are respectively fixedly connected in the three stirring installation cavities (23); the three stirring electromagnets are respectively installed in the three stirring installation cavities (23); the three piston springs (21) are respectively fixedly connected in the three piston installation cavities (24); and the three piston electromagnets are respectively installed in the three piston installation cavities (24).

8. The preparation system of the lead-free forward dielectric tunable antiferroelectric ceramic capacitor according to claim 7, characterized in that: The three stirring electromagnets each include a stirring mounting shell (25), and the three stirring mounting shells (25) are respectively fixedly connected in the three stirring mounting chambers (23); the three piston electromagnets each include a piston mounting shell (26), and the three piston mounting shells (26) are respectively fixedly connected in the three piston mounting chambers (24); the three stirring mounting shells (25) and the three piston mounting shells (26) are each fixedly connected with a conductor column (27), and the six conductor columns (27) are each wound with a spiral wire (28).

9. The preparation system of the lead-free forward dielectric adjustable antiferroelectric ceramic capacitor according to claim 8, characterized in that: The top of the mixing box (1) is fixedly connected to an auxiliary frame (29), the first fixed frame (6), the second fixed frame (7) and the third fixed frame (8) are all fixedly connected to the auxiliary frame (29), the auxiliary frame (29) is provided with three motor cavities, the three servo motors (9) are respectively installed in the three motor cavities, the output shafts of the three servo motors (9) are all installed with driving bevel gears (30), the three driving bevel gears (30) are all engaged with driven gear rings (31), and the driven gear rings (31) are respectively fixedly connected to the first rotating frame (3), the second rotating frame (4) and the third rotating frame (5).

10. The preparation system of the lead-free forward dielectric adjustable antiferroelectric ceramic capacitor according to claim 9, characterized in that: The first fixing frame (6), the second fixing frame (7) and the third fixing frame (8) are all connected to a feeding pipe (32), and the three feeding pipes (32) are respectively used for feeding materials into the first stirring chamber (13), the second stirring chamber (14) and the third stirring chamber (15).

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