An ai intelligent chip soft magnetic ferrite material for inductance and a preparation method thereof

Abstract

This invention relates to the field of soft magnetic ferrite materials technology, and discloses a soft magnetic ferrite material for AI smart chip inductors, comprising a main component, auxiliary component A, auxiliary component B, high-entropy dopant, and carbon powder. The main component composition and weight percentage are: Fe₂O₃ 70.07%-70.77%; MnO₂ 9.20%-29.85%; ZnO 0.03%-0.08%; Auxiliary component A: CaCO₃ 0.01%-0.25%; Nb₂O₅ 0.01%-0.10%; NiO The composition comprises three or more of the following: 0.01%–0.10% SiO2, 0.01%–0.05% SnO2, and 0.05%–0.40% Co3O4; auxiliary component B: 0.01%–0.02% SiO2, 0.01%–0.02% Y2O3, 0.01%–0.02% K2CO3, 0.01% Al2O3, 0.01%–0.04% CuO, 0.01%–0.05% MoO, and 0.05% Bi2O3, with a high entropy dopant mass percentage of 0.01%–0.015%; and carbon powder, with a mass percentage of 1%–1.3%. This product exhibits multiple excellent characteristics, including meeting wide-bandwidth, low-loss requirements while also satisfying high saturation flux density and high anti-saturation capability.

Description

Technical Field

[0001] This invention relates to the field of soft magnetic ferrite materials technology, and in particular to a soft magnetic ferrite material for AI smart chip inductors and its preparation method. Background Technology

[0002] With the development of high-computing applications and technologies such as AI and autonomous driving, GPUs and CPUs play a crucial role. Inductors, which supply power to the chips from the front end, are required to be highly efficient, small in size, and able to respond to large current changes, making them more suitable for high-power chip operation.

[0003] This necessitates that the ferrite materials used in chip inductors possess wide bandwidth, high loss (Bs), and low loss characteristics. However, as the operating frequency increases, core losses rise rapidly, and the loss mechanism also changes. This material is positioned to overcome these technical challenges and is a key material for high-frequency applications. Within the industry, to reduce high-frequency losses, engineers have conducted extensive research, including on main formulations, auxiliary components, and processing methods. For example, publication CN200910133729.5 discloses a high-frequency, low-loss ferrite material. By limiting the amount of iron oxide (Fe2O3) to 53-56 mol%, manganese carbonate (MnCO3) to 34-41 mol%, and zinc oxide (ZnO) to 6-10 mol%, a high-frequency, low-loss material was achieved. However, the material described in this literature only achieved a loss of <70 mW / cm³ at 500 kHz, 50 mT, and 100 °C, with a minimum loss >59 mW / cm³. 3 It is evident that there is no high-frequency material that can be used in the 0.5MHz-3MHz range, or rather, the loss is relatively high. Summary of the Invention

[0004] This invention provides a soft magnetic ferrite material for AI smart chip inductors and its preparation method, which has multiple excellent properties that meet the requirements of wide bandwidth and low loss, as well as high saturation magnetic flux density and high anti-saturation capability.

[0005] The above-mentioned technical objective of this invention is achieved through the following technical solution: a soft magnetic ferrite material for AI smart chip inductors, comprising a main component, auxiliary component A, auxiliary component B, high-entropy dopant, and carbon powder, wherein the main component composition and weight percentage are as follows:

[0006] Fe2O3 70.07%-70.77%

[0007] MnO 29.20%-29.85%

[0008] ZnO 0.03%-0.08%

[0009] The total proportion of all main components is 100%;

[0010] Relative to the weight of the main formulation, the components and weight percentages in auxiliary ingredient A are as follows: three or more of the following: CaCO3 0.01%-0.25%; Nb2O5 0.01%-0.10%; NiO 0.01%-0.10%; SnO2 0.01%-0.05%; Co3O4 0.05%-0.40%.

[0011] Relative to the weight of the main formulation, the components and weight percentages in auxiliary ingredient B are as follows: three or more of the following: SiO2 0.01%-0.02%, Y2O3 0.02%, K2CO3 0.01%-0.02%, Al2O3 0.01%, CuO 0.01%-0.04%, MoO 0.01%-0.05%, and Bi2O3 0.05%.

[0012] The mass percentage of high-entropy dopants is 0.01%-0.015%;

[0013] The toner content is 1%-1.3% by mass.

[0014] A further embodiment of the present invention is that the high-entropy dopant is MFe2O4, wherein M = (Mg, Fe, Co, Ni, Mn).

[0015] A further provision of the present invention is as follows: The preparation method of the high-entropy dopant is as follows: 1. Weigh MgO, FeO, CoO, NiO and MnO powders with a molar ratio of 1:1:1:1:1, place them in a polytetrafluoroethylene ball mill jar and ball mill them evenly. The ball milling media are agate balls and anhydrous ethanol. The rotation speed is 300 ppm and the ball milling time is 4 h; 2. Place the ball-milled slurry in an oven at 60°C and dry it. Then, sieve it through a 120-mesh sieve to obtain a uniformly mixed high-entropy dopant raw material powder.

[0016] A method for preparing a soft magnetic ferrite material for an AI smart chip inductor according to any one of claims 1-3, comprising the following steps:

[0017] Step S1: Initial ingredient preparation: Weigh the main raw materials Fe2O3, MnO, and ZnO powders and auxiliary ingredient A according to the required proportions, and mix them evenly in the initial stage;

[0018] Step S2: First ball milling: The main component and auxiliary component A prepared in step S1 are put into a sand mill for first ball milling according to the weight ratio of material:ball:water = 1:5-7:0.4-0.8. At the same time, dispersant is added according to the total weight of the sand milled slurry. The sand milling time is 1h-5h. After the first sand milling, the average particle size of the slurry is controlled at 0.5μm-1.0μm.

[0019] Step S3: Pre-firing: After the slurry from the first sand milling in step S2 is granulated by high-pressure spray drying, it is pre-firing in a rotary kiln at a temperature of 800℃-880℃ for 1-2 hours.

[0020] Step S4: Weigh the material after pre-calcination in step S3, and add auxiliary component B, high-entropy dopant and carbon powder according to the weight ratio to form powder.

[0021] Step S5: The material prepared in step S4 is fed into a ball mill for secondary sand milling at a weight ratio of material:ball:water = 1:5-6:0.4-0.6. At the same time, a dispersant is added according to the total weight of the sand milled slurry, and a polyvinyl alcohol solution is added. The ball milling time is 1h-4h. After secondary sand milling, the average particle size of the slurry is controlled at 0.3μm-0.8μm.

[0022] Step S6: Granulation: The mixture that has undergone secondary ball milling is added to a binder to form small particles, which are then sieved.

[0023] Step S7: Press molding: After mixing the small particles from step S6 with lubricant until uniform, the mixture is molded to obtain a blank.

[0024] Step S8: Secondary sintering: The blank obtained in step S7 is placed into a sintering furnace for sintering and shaping to obtain the soft magnetic ferrite material for AI smart chip inductors.

[0025] A further provision of the present invention is that the mass ratio of the dispersant added in step S2 according to the total weight of the sand-milled slurry is 0.01wt%-0.1wt%.

[0026] A further provision of the present invention is that the mass ratio of the dispersant added in step S5 according to the total weight of the sand-milled slurry is 0.11wt%-0.2wt%.

[0027] A further provision of the present invention is that the dispersant is selected from one of ammonium citrate, sodium polyacrylate, and gum arabic.

[0028] A further provision of the present invention is that the lubricant in step S7 is one or more of zinc stearate, paraffin wax, and oleic acid.

[0029] A further feature of the present invention is that air needs to be introduced into the high-temperature discharge port of the rotary kiln in step S3 for pre-firing, and an exhaust fan needs to be installed on the exhaust pipe to clean up the flue gas generated during the pre-firing process. At the same time, by adjusting the air intake and the feed rate, the magnetization of the pre-firing powder is made to be between 10μH / g and 15μH / g.

[0030] A further provision of the present invention is that the specific sintering process in step S8 is controlled as follows:

[0031] 1. Heating stage: Heating from 25℃ to 500℃ at a heating rate of 0.5℃ / min-1.5℃ / min in air atmosphere; heating from 500℃ to 800℃ at a heating rate of 5℃ / min in air atmosphere; heating from 800℃ to 1150℃ at a heating rate of 0.5℃ / min under an oxygen content of 0.01%-0.02% by volume.

[0032] 2. Insulation stage: Insulate at 1150℃ with an oxygen content of 0.06%-1.2% by volume for 5-9 hours;

[0033] 3. Cooling stage: Under the condition of oxygen content volume ratio of 0.01%-1.0%, the temperature is reduced from 1150℃ to 900℃ at a cooling rate of 0.5℃ / min; finally, under the condition of oxygen content volume ratio of 0.001%-0.01%, the temperature is reduced from 900℃ to 200℃ at a cooling rate of 0.5℃ / min-3℃ / min; after being taken out of the furnace at 200℃, it is allowed to cool naturally.

[0034] The beneficial effects of this invention are:

[0035] 1. In the preparation method of the present invention, by controlling the particle size of the first and second sand milling, the activity of the material is guaranteed, and the uniformity and refinement of the grain growth are ensured, laying the foundation for high frequency and low loss; at the same time, by introducing nitrogen gas into the pre-calcination cooling section for protection, the oxidation and lattice degradation of the spinel structure initially generated in the pre-calcination are prevented.

[0036] 2. This invention significantly reduces the dielectric loss of the soft magnetic ferrite by adding high-entropy dopants, wherein Fe... 2+ Co 2+ Ni 2+ This ensures the ferrimagnetism of ferrites. Mg 2+ Although it is not magnetic itself, it tends to occupy the interstices of octahedrons, thus making Fe... 3+ Simultaneously located in the interstices between tetrahedrons and octahedrons, the sample as a whole exhibits good subferrimagnetism. 2+ The ions belong to the iron group, which increases the saturation magnetization and coercivity of the ferrite. Appropriate amounts of Mn... 2+ The addition of ions increases the crystallinity of ferrite, improves the cation disorder inside the crystal, and greatly enhances the saturation magnetization and natural resonance and natural exchange resonance of ferrite. This reduces dielectric loss while further strengthening magnetic loss and improving impedance matching.

[0037] 3. In the process of preparing ferrite powder, the present invention adds carbon powder. On the one hand, the addition of carbon powder promotes the solid-phase reaction of ferrite powder, realizing the reaction at a lower temperature to generate spinelized ferrite powder with better microstructure and good magnetic properties. This is because the addition of carbon powder consumes oxygen in the reaction and promotes the spinelization reaction at this temperature. On the other hand, the addition of carbon powder can prevent the adhesion between ferrite powder grains, avoid agglomeration during the growth of manganese zinc ferrite powder grains, and reduce the energy consumption during powder dispersion. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] Example 1:

[0040] A soft magnetic ferrite material for inductors in AI smart chips includes a main component, auxiliary component A, auxiliary component B, high-entropy dopant, and carbon powder, wherein the main component composition and weight percentage are as follows:

[0041] Fe2O3 70.41%

[0042] MnO 29.54%

[0043] ZnO 0.05%

[0044] Relative to the weight of the main formulation, the components and weight percentages of auxiliary ingredient A are as follows: CaCO3 0.12%; Nb2O5 0.06%; NiO 0.04%;

[0045] Relative to the weight of the main formulation, the components and weight percentages of auxiliary ingredient B are as follows: SiO2 0.01%, Y2O3 0.01%, K2CO3 0.02%;

[0046] High entropy dopant (Mg 0.2 Fe 0.2 Co 0.2 Ni 0.2 Mn 0.2 The mass percentage of Fe2O4 is 0.01%;

[0047] The toner content is 1% by mass.

[0048] A method for preparing a soft magnetic ferrite material for an inductor in an AI smart chip includes the following steps:

[0049] Step S1: Initial ingredient preparation: Weigh the main raw materials Fe2O3, MnO, and ZnO powders and auxiliary ingredient A according to the required proportions, and mix them evenly in the initial stage;

[0050] Step S2: First ball milling: The main component and auxiliary component A prepared in step S1 are put into a sand mill for first ball milling according to the weight ratio of material:ball:water = 1:5-7:0.4-0.8. At the same time, dispersant is added according to the total weight of the sand milled slurry. The sand milling time is 1h-5h. After the first sand milling, the average particle size of the slurry is controlled at 0.5μm-1.0μm.

[0051] Step S3: Pre-firing: After the slurry from the first sand milling in step S2 is granulated by high-pressure spray drying, it is pre-firing in a rotary kiln at a temperature of 800℃-880℃ for 1-2 hours.

[0052] Step S4: Weigh the material after pre-calcination in step S3, and add auxiliary component B, high-entropy dopant and carbon powder according to the weight ratio to form powder.

[0053] Step S5: The material prepared in step S4 is fed into a ball mill for secondary sand milling at a weight ratio of material:ball:water = 1:5-6:0.4-0.6. At the same time, a dispersant is added according to the total weight of the sand milled slurry, and a polyvinyl alcohol solution is added. The ball milling time is 1h-4h. After secondary sand milling, the average particle size of the slurry is controlled at 0.3μm-0.8μm.

[0054] Step S6: Granulation: The mixture that has undergone secondary ball milling is added to a binder to form small particles, which are then sieved.

[0055] Step S7: Press molding: After mixing the small particles from step S6 with lubricant until uniform, the mixture is molded to obtain a blank.

[0056] Step S8: Secondary sintering: The blank obtained in step S7 is placed into a sintering furnace for sintering and shaping to obtain the soft magnetic ferrite material for AI smart chip inductors.

[0057] Example 2:

[0058] A soft magnetic ferrite material for inductors in AI smart chips includes a main component, auxiliary component A, auxiliary component B, high-entropy dopant, and carbon powder, wherein the main component composition and weight percentage are as follows:

[0059] Fe2O3 70.41%

[0060] MnO 29.54%

[0061] ZnO 0.05%

[0062] Relative to the weight of the main formulation, the components and weight percentages of auxiliary ingredient A are as follows: CaCO3 0.12%; Nb2O5 0.06%; NiO 0.04%;

[0063] Relative to the weight of the main formulation, the components and weight percentages of auxiliary ingredient B are as follows: SiO2 0.01%, Y2O3 0.01%, K2CO3 0.02%;

[0064] High entropy dopant (Mg 0.2 Fe 0.2 Co 0.2 Ni 0.2 Mn 0.2 The mass percentage of Fe2O4 is 0.01%;

[0065] A method for preparing a soft magnetic ferrite material for an inductor in an AI smart chip includes the following steps:

[0066] Step S1: Initial ingredient preparation: Weigh the main raw materials Fe2O3, MnO, and ZnO powders and auxiliary ingredient A according to the required proportions, and mix them evenly in the initial stage;

[0067] Step S2: First ball milling: The main component and auxiliary component A prepared in step S1 are put into a sand mill for first ball milling according to the weight ratio of material:ball:water = 1:5-7:0.4-0.8. At the same time, dispersant is added according to the total weight of the sand milled slurry. The sand milling time is 1h-5h. After the first sand milling, the average particle size of the slurry is controlled at 0.5μm-1.0μm.

[0068] Step S3: Pre-firing: After the slurry from the first sand milling in step S2 is granulated by high-pressure spray drying, it is pre-firing in a rotary kiln at a temperature of 800℃-880℃ for 1-2 hours.

[0069] Step S4: Weigh the material after pre-calcination in step S3, and add auxiliary component B and high-entropy dopant according to the weight ratio to form powder;

[0070] Step S5: The material prepared in step S4 is fed into a ball mill for secondary sand milling at a weight ratio of material:ball:water = 1:5-6:0.4-0.6. At the same time, a dispersant is added according to the total weight of the sand milled slurry, and a polyvinyl alcohol solution is added. The ball milling time is 1h-4h. After secondary sand milling, the average particle size of the slurry is controlled at 0.3μm-0.8μm.

[0071] Step S6: Granulation: The mixture that has undergone secondary ball milling is added to a binder to form small particles, which are then sieved.

[0072] Step S7: Pressing and molding: After mixing the small particles from step S6 with lubricant evenly, the mixture is molded to obtain a blank; Step S8: Secondary sintering: The blank obtained in step S7 is placed into a sintering furnace for sintering and molding to obtain the soft magnetic ferrite material for AI smart chip inductors.

[0073] Example 3:

[0074] A soft magnetic ferrite material for inductors in AI smart chips includes a main component, auxiliary component A, auxiliary component B, high-entropy dopant, and carbon powder, wherein the main component composition and weight percentage are as follows:

[0075] Fe2O3 70.41%

[0076] MnO 29.54%

[0077] ZnO 0.05%

[0078] Relative to the weight of the main formulation, the components and weight percentages of auxiliary ingredient A are as follows: CaCO3 0.12%; Nb2O5 0.06%; NiO 0.04%;

[0079] Relative to the weight of the main formulation, the components and weight percentages of auxiliary ingredient B are as follows: SiO2 0.01%, Y2O3 0.01%, K2CO3 0.02%;

[0080] The toner content is 1.1% by mass.

[0081] A method for preparing a soft magnetic ferrite material for an inductor in an AI smart chip includes the following steps:

[0082] Step S1: Initial ingredient preparation: Weigh the main raw materials Fe2O3, MnO, and ZnO powders and auxiliary ingredient A according to the required proportions, and mix them evenly in the initial stage;

[0083] Step S2: First ball milling: The main component and auxiliary component A prepared in step S1 are put into a sand mill for first ball milling according to the weight ratio of material:ball:water = 1:5-7:0.4-0.8. At the same time, dispersant is added according to the total weight of the sand milled slurry. The sand milling time is 1h-5h. After the first sand milling, the average particle size of the slurry is controlled at 0.5μm-1.0μm.

[0084] Step S3: Pre-firing: After the slurry from the first sand milling in step S2 is granulated by high-pressure spray drying, it is pre-firing in a rotary kiln at a temperature of 800℃-880℃ for 1-2 hours.

[0085] Step S4: Weigh the material after pre-calcination in step S3, and add auxiliary component B and carbon powder according to the weight ratio to form powder;

[0086] Step S5: The material prepared in step S4 is fed into a ball mill for secondary sand milling at a weight ratio of material:ball:water = 1:5-6:0.4-0.6. At the same time, a dispersant is added according to the total weight of the sand milled slurry, and a polyvinyl alcohol solution is added. The ball milling time is 1h-4h. After secondary sand milling, the average particle size of the slurry is controlled at 0.3μm-0.8μm.

[0087] Step S6: Granulation: The mixture that has undergone secondary ball milling is added to a binder to form small particles, which are then sieved.

[0088] Step S7: Press molding: After mixing the small particles from step S6 with lubricant until uniform, the mixture is molded to obtain a blank.

[0089] Step S8: Secondary sintering: The blank obtained in step S7 is placed into a sintering furnace for sintering and shaping to obtain the soft magnetic ferrite material for AI smart chip inductors.

[0090] Comparative Example 1:

[0091] A soft magnetic ferrite material for AI smart chip inductors includes a main component, auxiliary component A, and auxiliary component B, wherein the main component and its weight percentage are as follows:

[0092] Fe2O3 70.41%

[0093] MnO 29.54%

[0094] ZnO 0.05%

[0095] Relative to the weight of the main formulation, the components and weight percentages of auxiliary ingredient A are as follows: CaCO3 0.12%; Nb2O5 0.06%; NiO 0.04%;

[0096] Relative to the weight of the main formulation, the components and weight percentages of auxiliary ingredient B are as follows: SiO2 0.01%, Y2O3 0.01%, K2CO3 0.02%;

[0097] A method for preparing a soft magnetic ferrite material for an inductor in an AI smart chip includes the following steps:

[0098] Step S1: Initial ingredient preparation: Weigh the main raw materials Fe2O3, MnO, and ZnO powders and auxiliary ingredient A according to the required proportions, and mix them evenly in the initial stage;

[0099] Step S2: First ball milling: The main component and auxiliary component A prepared in step S1 are put into a sand mill for first ball milling according to the weight ratio of material:ball:water = 1:5-7:0.4-0.8. At the same time, dispersant is added according to the total weight of the sand milled slurry. The sand milling time is 1h-5h. After the first sand milling, the average particle size of the slurry is controlled at 0.5μm-1.0μm.

[0100] Step S3: Pre-firing: After the slurry from the first sand milling in step S2 is granulated by high-pressure spray drying, it is pre-firing in a rotary kiln at a temperature of 800℃-880℃ for 1-2 hours.

[0101] Step S4: Weigh the material after pre-calcination in step S3, and add auxiliary component B according to the weight ratio to form powder;

[0102] Step S5: The material prepared in step S4 is fed into a ball mill for secondary sand milling at a weight ratio of material:ball:water = 1:5-6:0.4-0.6. At the same time, a dispersant is added according to the total weight of the sand milled slurry, and a polyvinyl alcohol solution is added. The ball milling time is 1h-4h. After secondary sand milling, the average particle size of the slurry is controlled at 0.3μm-0.8μm.

[0103] Step S6: Granulation: The mixture that has undergone secondary ball milling is added to a binder to form small particles, which are then sieved.

[0104] Step S7: Press molding: After mixing the small particles from step S6 with lubricant until uniform, the mixture is molded to obtain a blank.

[0105] Step S8: Secondary sintering: The blank obtained in step S7 is placed into a sintering furnace for sintering and shaping to obtain the soft magnetic ferrite material for AI smart chip inductors.

[0106] Comparative Example 2:

[0107] A soft magnetic ferrite material for inductors in AI smart chips includes a main component, auxiliary component A, auxiliary component B, high-entropy dopant, and carbon powder, wherein the main component composition and weight percentage are as follows:

[0108] Fe2O3 70.34%

[0109] MnO 29.61%

[0110] ZnO 0.05%

[0111] Relative to the weight of the main formulation, the components and weight percentages of auxiliary ingredient A are as follows: NiO 0.04%; SnO2 0.03%; Co3O4 0.12%;

[0112] Relative to the weight of the main formulation, the components and weight percentages of auxiliary ingredient B are as follows: CuO 0.03%, MoO 0.02%, Bi₂O₃ 0.05%;

[0113] A method for preparing a soft magnetic ferrite material for an inductor in an AI smart chip includes the following steps:

[0114] Step S1: Initial ingredient preparation: Weigh the main raw materials Fe2O3, MnO, and ZnO powders and auxiliary ingredient A according to the required proportions, and mix them evenly in the initial stage;

[0115] Step S2: First ball milling: The main component and auxiliary component A prepared in step S1 are put into a sand mill for first ball milling according to the weight ratio of material:ball:water = 1:5-7:0.4-0.8. At the same time, dispersant is added according to the total weight of the sand milled slurry. The sand milling time is 1h-5h. After the first sand milling, the average particle size of the slurry is controlled at 0.5μm-1.0μm.

[0116] Step S3: Pre-firing: After the slurry from the first sand milling in step S2 is granulated by high-pressure spray drying, it is pre-firing in a rotary kiln at a temperature of 800℃-880℃ for 1-2 hours.

[0117] Step S4: Weigh the material after pre-calcination in step S3, and add auxiliary component B according to the weight ratio to form powder;

[0118] Step S5: The material prepared in step S4 is fed into a ball mill for secondary sand milling at a weight ratio of material:ball:water = 1:5-6:0.4-0.6. At the same time, a dispersant is added according to the total weight of the sand milled slurry, and a polyvinyl alcohol solution is added. The ball milling time is 1h-4h. After secondary sand milling, the average particle size of the slurry is controlled at 0.3μm-0.8μm.

[0119] Step S6: Granulation: The mixture that has undergone secondary ball milling is added to a binder to form small particles, which are then sieved.

[0120] Step S7: Press molding: After mixing the small particles from step S6 with lubricant until uniform, the mixture is molded to obtain a blank.

[0121] Step S8: Secondary sintering: The blank obtained in step S7 is placed into a sintering furnace for sintering and shaping to obtain the soft magnetic ferrite material for AI smart chip inductors.

[0122] Table 1. Raw material addition ratio and performance test results of the examples

[0123]

[0124] Table 2. Power loss of the soft magnetic ferrites prepared in Example 1 and Comparative Example 1 over a wide frequency range of 500 kHz to 3 MHz (data based on T14 / 9 / 5 ring test).

[0125]

[0126] This invention provides a soft magnetic ferrite material for AI smart chip inductors, which has multiple excellent properties that meet the requirements of wide bandwidth and low loss, as well as high saturation magnetic flux density and high anti-saturation capability, and realizes a high-frequency material that can be used in the range of 0.5MHz-3MHz.

Claims

1. A soft magnetic ferrite material for inductors in AI smart chips, characterized in that: It includes a main component, auxiliary component A, auxiliary component B, high-entropy dopant, and carbon powder, wherein the main component composition and weight percentage are as follows: Fe2O3 70.07% - 70.77% MnO 29.20%-29.85% ZnO 0.03%-0.08% The total proportion of all main components is 100%; Relative to the weight of the main formulation, the components and weight percentages in auxiliary ingredient A are as follows: three or more of the following: CaCO3 0.01%-0.25%; Nb2O5 0.01%-0.10%; NiO 0.01%-0.10%; SnO2 0.01%-0.05%; Co3O4 0.05%-0.40%; Relative to the weight of the main formulation, the components and weight percentages in auxiliary ingredient B are as follows: three or more of the following: SiO2 0.01%-0.02%, Y2O3 0-0.02%, K2CO3 0.01%-0.02%, Al2O3 0-0.01%, CuO 0.01%-0.04%, MoO 0.01%-0.05%, and Bi2O3 0-0.05%. The mass percentage of high-entropy dopants ranges from 0.01% to 0.015%. The toner's mass percentage is 1%-1.3%; The high-entropy dopant is MFe2O4, where M = (Mg, Fe, Co, Ni, Mn).

2. The soft magnetic ferrite material for AI smart chip inductors according to claim 1, characterized in that: The preparation method of the high-entropy dopant is as follows:

1. Weigh MgO, FeO, CoO, NiO and MnO powders with a molar ratio of 1:1:1:1:1, place them in a polytetrafluoroethylene ball mill jar and ball mill them evenly. The ball milling media are agate balls and anhydrous ethanol. The rotation speed is 300 ppm and the ball milling time is 4 h; 2. Place the ball-milled slurry in an oven at 60℃ and dry it. Then, sieve it through a 120-mesh sieve to obtain a uniformly mixed high-entropy dopant raw material powder.

3. A method for preparing a soft magnetic ferrite material for an AI smart chip inductor according to any one of claims 1-2, characterized in that: Includes the following steps: Step S1: Initial ingredient preparation: Weigh the main raw materials Fe2O3, MnO, and ZnO powders and auxiliary ingredient A according to the required proportions, and mix them evenly in the initial stage; Step S2: First ball milling: The main component and auxiliary component A prepared in step S1 are put into a sand mill for first ball milling at a weight ratio of material:ball:water = 1:5-7:0.4-0.

8. At the same time, dispersant is added according to the total weight of the sand milled slurry. The sand milling time is 1h-5h. After the first sand milling, the average particle size of the slurry is controlled at 0.5μm-1.0μm. Step S3: Pre-firing: After the slurry from the first sand milling in step S2 is granulated by high-pressure spray drying, it is pre-firing in a rotary kiln at a temperature of 800℃-880℃ for 1-2 hours. Step S4: Weigh the material after pre-calcination in step S3, and add auxiliary component B, high-entropy dopant and carbon powder according to the weight ratio to form powder. Step S5: Add the materials prepared in step S4 to the ball mill for secondary sand milling at a weight ratio of material:ball:water = 1:5-6:0.4-0.

6. At the same time, add dispersant according to the total weight of the sand milled slurry and add polyvinyl alcohol solution. The ball milling time is 1h-4h. After secondary sand milling, the average particle size of the slurry is controlled at 0.3μm-0.8μm. Step S6: Granulation: The mixture that has undergone secondary ball milling is added to a binder to form small particles, which are then sieved. Step S7: Press molding: After mixing the small particles from step S6 with lubricant until uniform, the mixture is molded to obtain a blank. Step S8: Secondary sintering: The blank obtained in step S7 is placed into a sintering furnace for sintering and shaping to obtain the soft magnetic ferrite material for AI smart chip inductors.

4. The method for preparing a soft magnetic ferrite material for an AI smart chip inductor according to claim 3, characterized in that: In step S2, the mass ratio of dispersant added according to the total weight of the sand-milled slurry is 0.01 wt%-0.1 wt%.

5. The method for preparing a soft magnetic ferrite material for an AI smart chip inductor according to claim 3, characterized in that: In step S5, the mass ratio of dispersant added according to the total weight of the sand-milled slurry is 0.11 wt%-0.2 wt%.

6. The method for preparing a soft magnetic ferrite material for an AI smart chip inductor according to claim 3, characterized in that: The dispersant is selected from one or more of ammonium citrate, sodium polyacrylate, and gum arabic.

7. The method for preparing a soft magnetic ferrite material for an AI smart chip inductor according to claim 3, characterized in that: The lubricant mentioned in step S7 is one or more of zinc stearate, paraffin wax, and oleic acid.

8. The method for preparing a soft magnetic ferrite material for an AI smart chip inductor according to claim 3, characterized in that: In step S3, air needs to be introduced into the high-temperature discharge port of the rotary kiln for pre-firing, and an exhaust fan needs to be installed on the exhaust pipe to completely remove the flue gas generated during the pre-firing process. At the same time, by adjusting the air intake and the feed rate, the magnetization of the pre-firing powder is kept between 10μH / g and 15μH / g.

9. The method for preparing a soft magnetic ferrite material for an AI smart chip inductor according to claim 3, characterized in that: The specific sintering process control in step S8 is as follows:

1. Heating stage: In air atmosphere, the temperature is increased from 25℃ to 500℃ at a heating rate of 0.5℃ / min-1.5℃ / min; in air atmosphere, the temperature is increased from 500℃ to 800℃ at a heating rate of 5℃ / min; and in air atmosphere, the temperature is increased from 800℃ to 1150℃ at a heating rate of 0.5℃ / min under conditions of oxygen content of 0.01%-0.02% by volume.

2. Insulation stage: Insulate at 1150℃ for 5-9 hours with an oxygen content of 0.06%-1.2% by volume.

3. Cooling stage: Under the condition of oxygen content volume ratio of 0.01%-1.0%, the temperature is reduced from 1150℃ to 900℃ at a cooling rate of 0.5℃ / min; finally, under the condition of oxygen content volume ratio of 0.001%-0.01%, the temperature is reduced from 900℃ to 200℃ at a cooling rate of 0.5℃ / min-3℃ / min; after being removed from the furnace at 200℃, it is allowed to cool naturally.

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