Magnetic dielectric resin composition and application thereof

Abstract

The invention provides a magnetic dielectric resin composition and application thereof. The magnetic dielectric resin composition comprises a combination of resin and a modified Y-shaped hexagonal magnetic filler, the modified Y-shaped hexagonal magnetic filler is prepared by adopting a method comprising the following steps: co-firing a Y-shaped hexagonal magnetic filler, a potassium-containing substance and calcium carbonate to obtain the modified Y-shaped hexagonal magnetic filler, the chemical formula of the Y-shaped hexagonal magnetic filler is BaMeFe6O11, and Me comprises any one or a combination of at least two of Co, Ca or Sr; the potassium-containing substance comprises potassium feldspar and / or potassium carbonate; the total mass of the Y-shaped hexagonal magnetic filler, the potassium-containing substance and the calcium carbonate is 100%, the mass fraction of the potassium-containing substance is 10-25%, and the mass fraction of the calcium carbonate is 5-20%. The magnetic dielectric resin composition has the characteristics of high magnetic conductivity and low high-frequency magnetic loss at the same time.

Description

Technical Field

[0001] The present invention belongs to the technical field of laminates, and relates to a magnetodielectric resin composition and its application. Background Art

[0002] With the development of high-density mounting technology and emerging microfabrication technologies such as microelectronics and micromachinery, capacitors, integrated circuits, circuit modules, and antenna radio frequency modules are continuously developing towards miniaturization. As a key component in radar and modern wireless communication systems, the antenna encounters bottlenecks in its miniaturization process, and how to reduce the antenna size has attracted great attention.

[0003] Currently, one of the methods to reduce the antenna size is to use high-dielectric materials. High-dielectric constant sheets are disclosed in CN103101252A and CN103351578A. However, for the sheets made of high-dielectric materials, although the antenna size can be reduced, the antenna gain will be reduced and the overall antenna performance will be degraded.

[0004] Another method to reduce the antenna size is to use magnetodielectric materials as substrates. Magnetodielectric sheets can be used as buried inductors, which can reduce the antenna size, thereby reducing the size of electronic products and optimizing the performance of electronic products. The characteristic parameters of the antenna are shown in Equation 1 below, where (ε r μ r ) 1 / 2 is the miniaturization factor. The higher the dielectric constant ε r and the larger the magnetic permeability μ r , the higher the miniaturization factor, which is more beneficial to miniaturization. When the dielectric constant cannot be changed, increasing the magnetic permeability can effectively reduce the antenna size while maintaining or increasing the antenna gain and bandwidth.

[0005] λ = c / f(ε r μ r ) 1 / 2 (1)

[0006] The Y-type hexagonal magnetic material barium ferrite has the advantage of high magnetic permeability. When used as a component of magnetodielectric materials, it can reduce the antenna size. However, its high-frequency magnetic loss is relatively high, which will cause a large loss of magnetodielectric materials.

[0007] Therefore, it is urgent to modify the Y-type hexagonal magnetic material so that the corresponding magnetodielectric material has both high magnetic permeability and low high-frequency magnetic loss. Summary of the Invention

[0008] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a magnetodielectric resin composition and its application. By co-firing Y-type hexagonal magnetic fillers with potassium-containing substances and calcium carbonate, the present invention obtains modified Y-type hexagonal magnetic fillers. Under the synergistic effect of the potassium-containing substances and calcium carbonate, the magnetic permeability of the magnetic fillers can be increased, and the high-frequency magnetic loss can be reduced, so that the corresponding magnetodielectric resin composition has the characteristics of both high magnetic permeability and low high-frequency magnetic loss.

[0009] To achieve this purpose, the present invention adopts the following technical solutions:

[0010] In the first aspect, the present invention provides a magnetodielectric resin composition, which comprises a combination of a resin and modified Y-type hexagonal magnetic fillers;

[0011] The modified Y-type hexagonal magnetic fillers are prepared by the following method, which includes:

[0012] Co-firing Y-type hexagonal magnetic fillers, potassium-containing substances and calcium carbonate to obtain the modified Y-type hexagonal magnetic fillers;

[0013] The chemical formula of the Y-type hexagonal magnetic fillers is BaMeFe6O 11 , where Me includes any one or a combination of at least two of Co, Ca or Sr;

[0014] The potassium-containing substances include potassium feldspar and / or potassium carbonate;

[0015] Based on the total mass of the Y-type hexagonal magnetic fillers, potassium-containing substances and calcium carbonate being 100%, the mass fraction of the potassium-containing substances is 10-25%, for example, it can be 10%, 12%, 14%, 16%, 18%, 20%, 22% or 25%, etc., and the mass fraction of the calcium carbonate is 5-20%, for example, it can be 5%, 6%, 7%, 10%, 12%, 15%, 17% or 20%, etc.

[0016] The present invention provides a magnetodielectric resin composition. By co-firing Y-type hexagonal magnetic fillers with potassium-containing substances and calcium carbonate, modified Y-type hexagonal magnetic fillers are obtained. Among them, the potassium-containing substances with a mass fraction of 10-25% can help increase the magnetic permeability and reduce the high-frequency magnetic loss, and the calcium carbonate with a mass fraction of 5-20% can reduce the high-frequency magnetic loss. When using potassium-containing substances and calcium carbonate to modify Y-type hexagonal magnetic fillers, the synergistic effects of ion substitution and crystal form optimization can occur, and the co-firing method can microscopically optimize the magnetic permeability and reduce the high-frequency magnetic loss. Therefore, under the synergistic effect of potassium-containing substances and calcium carbonate, the magnetic permeability of the magnetic fillers can be increased, and the high-frequency magnetic loss can be reduced, so that the corresponding magnetodielectric resin composition has the characteristics of both high magnetic permeability and low high-frequency magnetic loss.

[0017] In the present invention, when modifying the Y-type hexagonal magnetic filler, if the mass fraction of the potassium-containing substance is too low, the optimization of the high-frequency magnetic loss will not be obvious; if the mass fraction of the potassium-containing substance is too high, since potassium is a non-magnetic substance, the magnetic permeability of the Y-type hexagonal magnetic filler will decrease significantly. If the mass fraction of calcium carbonate is too low, the optimization of the high-frequency magnetic loss will not be obvious; if the mass fraction of calcium carbonate is too high, the magnetic permeability will decrease significantly.

[0018] Preferably, based on the total mass of the magnetodielectric resin composition being 100%, the mass fraction of the modified Y-type hexagonal magnetic filler is 20-90%, for example, it can be 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85% or 90%, etc.

[0019] In the present invention, if the mass fraction of the modified Y-type hexagonal magnetic filler is too low, the magnetic permeability will be too low; if the mass fraction of the modified Y-type hexagonal magnetic filler is too high, the processing process will be difficult.

[0020] Preferably, the average particle size of the modified Y-type hexagonal magnetic filler is 0.1-30 μm, for example, it can be 0.1 μm, 2 μm, 5 μm, 8 μm, 10 μm, 13 μm, 16 μm, 19 μm, 22 μm, 25 μm, 28 μm or 30 μm, etc. The particle size of the filler is measured by the laser diffraction method, and the measuring instrument is the Malvern laser particle size analyzer, model MS3000.

[0021] Preferably, the raw materials for co-firing further include single metal oxides.

[0022] Preferably, based on the total mass of the modified Y-type hexagonal magnetic filler being 100%, the mass fraction of the single metal oxide is 5-10%, for example, it can be 5%, 6%, 7%, 8%, 9% or 10%, etc.

[0023] Preferably, the single metal oxide includes any one or a combination of at least two of manganese oxide, zinc oxide, nickel oxide or copper oxide.

[0024] Preferably, the temperature for co-firing is 700-1300 °C, for example, it can be 700 °C, 800 °C, 900 °C, 910 °C, 920 °C, 930 °C, 940 °C, 950 °C, 960 °C, 970 °C, 980 °C, 990 °C, 1000 °C, 1100 °C, 1200 °C or 1300 °C, etc.

[0025] Preferably, the time for co-firing is 2-8 h, for example, it can be 2 h, 3 h, 4 h, 5 h, 6 h, 7 h or 8 h, etc.

[0026] In the present invention, when the co-firing temperature and co-firing time are controlled within the above ranges, the magnetic permeability and magnetic loss of the material can be effectively improved.

[0027] Preferably, the resin includes any one or a combination of at least two of epoxy resin, cyanate resin, polyphenylene ether resin, polybutadiene resin, styrene-butadiene resin, bismaleimide-triazine resin, bismaleimide resin, polytetrafluoroethylene resin, polyimide resin, phenolic resin, acrylic resin, liquid crystal resin, benzoxazine resin, nitrile rubber, carboxyl-terminated nitrile rubber or hydroxyl-terminated nitrile rubber.

[0028] Preferably, based on the total mass of the magnetodielectric resin composition being 100%, the mass fraction of the resin is 10-80%, for example, it can be 10%, 15%, 20%, 30%, 40%, 50%, 60%, 70% or 80%, etc.

[0029] Preferably, the magnetodielectric resin composition further includes non-magnetic fillers and a promoter.

[0030] Preferably, based on the total mass of the magnetodielectric resin composition being 100%, the mass fraction of the non-magnetic filler is 5-20%, for example, it can be 5%, 7%, 10%, 12%, 15% or 20%, etc.

[0031] Preferably, based on the total mass of the magnetodielectric resin composition being 100%, the mass fraction of the promoter is 0.1-8%, for example, it can be 0.1%, 0.2%, 0.5%, 1%, 2%, 3%, 5% or 8%, etc.

[0032] Preferably, the non-magnetic filler includes any one or a combination of at least two of silica, titanium dioxide, barium titanate, strontium titanate, magnesium titanate, calcium titanate, strontium barium titanate, barium calcium titanate, lead titanate, lead zirconate titanate, lead lanthanum zirconate titanate, barium lanthanum titanate, barium zirconate titanate, hafnium dioxide, lead magnesium niobate, barium magnesium niobate, lithium niobate, potassium niobate, strontium aluminum tantalate, potassium tantalum niobate, strontium barium niobate, barium lead niobate, barium titanium niobate, strontium bismuth tantalate, bismuth titanate, rubidium barium titanate, copper titanate or lead titanate-lead magnesium niobate.

[0033] Preferably, the promoter includes any one or a combination of at least two of 2-methylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 2-undecylimidazole, 1-benzyl-2-methylimidazole, 2-heptadecylimidazole, 2-isopropylimidazole, 2-phenyl-4-methylimidazole, 2-dodecylimidazole or 1-cyanoethyl-2-methylimidazole.

[0034] Preferably, the magnetodielectric resin composition further includes an initiator.

[0035] Preferably, based on the total mass of the magnetodielectric resin composition being 100%, the mass fraction of the initiator is 0.1 - 8%, for example, it can be 0.1%, 0.2%, 0.5%, 1%, 2%, 3%, 5% or 8%, etc.

[0036] Preferably, the initiator includes any one or a combination of at least two of a,a'-bis(tert-butylperoxy-m-isopropylbenzene)benzene, dicumyl peroxide, tert-butylcumyl peroxide, 1,1-bis(tert-hexylperoxy)-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hex-3-yne, tert-butyl octanoate, tert-butyl perbenzoate, triethylamine, triethylamine salt compound, quaternary ammonium salt compound, 2,4,6-tris(dimethylaminomethyl)phenol, benzyldimethylamine, imidazoles, tripentylphenol amide, monophenol compound, polyphenol compound, boron trifluoride, complex of boron trifluoride and organic compound, phosphoric acid or triphenyl phosphite.

[0037] Preferably, the magnetodielectric resin composition further includes a crosslinking agent.

[0038] Preferably, based on the total mass of the magnetodielectric resin composition being 100%, the mass fraction of the crosslinking agent is 5 - 20%, for example, it can be 5%, 7%, 10%, 12%, 15% or 20%, etc.

[0039] Preferably, the crosslinking agent includes any one or a combination of at least two of triallyl isocyanurate, poly(triallyl isocyanurate), triallyl cyanurate, trimethacrylic acid, diallyl phthalate, divinylbenzene or polyfunctional acrylate.

[0040] In a second aspect, the present invention provides a resin solution, which includes the magnetodielectric resin composition as described in the first aspect and a solvent.

[0041] Preferably, the solvent includes any one or a combination of at least two of ethers, ketones, aromatic hydrocarbons, esters or nitrogen-containing solvents.

[0042] More preferably, the solvent includes ethers such as methanol, ethanol, butanol, ethyl cellosolve, butyl cellosolve, ethylene glycol monomethyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, etc., or any one or a combination of at least two of acetone, butanone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene, xylene, mesitylene, ethoxyethyl acetate, ethyl acetate, N,N-dimethylformamide, N,N-dimethylacetamide or N-methyl-2-pyrrolidone.

[0043] In a third aspect, the present invention provides a prepreg, which includes a reinforcing material and the magnetodielectric resin composition as described in the first aspect attached to the reinforcing material.

[0044] Preferably, the reinforcing material includes fiberglass cloth.

[0045] In a fourth aspect, the present invention provides a magnetic film, which comprises the magnetodielectric resin composition described in the first aspect. The magnetic film is obtained by coating the magnetodielectric resin composition on a release material and drying and / or baking it.

[0046] In a fifth aspect, the present invention provides a magnetic paste, which comprises the magnetodielectric resin composition described in the first aspect.

[0047] In a sixth aspect, the present invention provides a metal-clad laminate, which comprises at least one prepreg as described in the third aspect, and metal foil is coated on at least one side (such as one surface or both surfaces) of the stacked prepregs. The at least one prepreg can be, for example, 1, 2, 3, 4, 5, 7, or 10 sheets, etc.

[0048] In a seventh aspect, the present invention provides a printed circuit board, which comprises at least one of the prepreg as described in the third aspect and the metal-clad laminate as described in the sixth aspect.

[0049] The numerical ranges described in the present invention not only include the above-listed point values, but also include any point values between the above numerical ranges not listed. Due to space limitations and for the sake of brevity, the present invention does not exhaustively list the specific point values included in the ranges.

[0050] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0051] The present invention provides a magnetodielectric resin composition. By co-firing Y-type hexagonal magnetic fillers with potassium-containing substances and calcium carbonate, modified Y-type hexagonal magnetic fillers are obtained. Among them, potassium-containing substances with a mass fraction of 10-25% can help improve the magnetic permeability and reduce the high-frequency magnetic loss, and calcium carbonate with a mass fraction of 5-20% can reduce the high-frequency magnetic loss. When using potassium-containing substances and calcium carbonate to modify Y-type hexagonal magnetic fillers, ion substitution and crystal form optimization can occur synergistically, and the co-firing method can microscopically optimize the magnetic permeability and reduce the high-frequency magnetic loss. Therefore, under the synergistic effect of potassium-containing substances and calcium carbonate, the magnetic permeability of the magnetic fillers can be improved, and the high-frequency magnetic loss can be reduced, so that the corresponding magnetodielectric resin composition has the characteristics of high magnetic permeability and low high-frequency magnetic loss at the same time. Specific Embodiments

[0052] The technical solutions of the present invention will be further described below through specific embodiments.

[0053] Preparation Examples

[0054] The components and properties of the magnetic fillers used in the following examples and comparative examples of the present invention are shown in Table 1; in Table 1, the content of each component is in mass percentage.

[0055] Table 1

[0056]

[0057]

[0058] The preparation methods of the modified Y-type hexagonal magnetic fillers A to F are as follows:

[0059] According to the formula shown in Table 1, weigh each raw material component according to the mass ratio, mix them physically and dryly for 1 h to prepare a ring-shaped green body, and then sinter according to the co-firing temperature and co-firing time described in Table 1; the sintered product obtained is a ring-shaped sample (inner diameter 3.04 mm, outer diameter 6.96 mm and thickness 3 mm); wet ball-mill and crush the sintered product in a ball mill at a rotation speed of 3000 r / min for 1 to 5 h, and the particle size of the zirconium beads is compounded at 1 to 10 mm; dry after ball milling to obtain the modified Y-type hexagonal magnetic filler; different particle sizes are prepared by controlling the ball milling time.

[0060] In Table 1, the average particle size of the magnetic filler is tested by the laser diffraction method, and the testing instrument is the Malvern laser particle size analyzer, model MS3000.

[0061] In Table 1, the testing methods for the relative magnetic permeability and magnetic loss tangent at 2 GHz are as follows:

[0062] Test the above-mentioned ring-shaped sample obtained by sintering, and use the Keysight E5071C network analyzer + N1500 test system as the testing instrument to test the relative magnetic permeability and magnetic loss tangent of the material at 2 GHz.

[0063] The materials used in the following examples and comparative examples are specifically as follows:

[0064] Hydrocarbon resin: Nippon Soda B3000;

[0065] Polyphenylene ether resin: Sabic SA9000;

[0066] Brominated epoxy resin B: Changchun, Taiwan, China BEB531A80P;

[0067] Phenoxy resin C: Nippon Steel YP-50EK35;

[0068] Epoxy resin A: Nippon Steel ZX1059;

[0069] 1,4-Bis(tert-butylperoxy)cumene (BIPB) initiator: Hunan Fangruida Chemical Co., Ltd.;

[0070] 2-Methylimidazole (2-MI): BASF (Germany).

[0071] Example 1

[0072] This example provides a magnetodielectric resin composition, comprising 74 g of polyphenylene ether resin SA9000, 6 g of BIPB initiator, and 20 g of modified Y-type hexagonal magnetic filler A.

[0073] The magnetodielectric resin composition is used for the preparation of a copper clad laminate, and the specific method is as follows:

[0074] (1) Mix the magnetodielectric resin composition with ethylene glycol monomethyl ether and disperse evenly at room temperature to obtain a resin glue solution;

[0075] (2) Impregnate the resin glue solution obtained in step (1) with a reinforcing material (glass fiber cloth), place it in an oven at 155 °C and bake for 5 min to achieve curing to obtain a prepreg; Place 6 sheets of 5-mil-thick prepreg between two copper foils, laminate and cure at 210 °C and 5 MPa pressure in a hot press for 2 h to obtain the copper clad laminate.

[0076] Example 2

[0077] This example provides a magnetodielectric resin composition, comprising 4 g of epoxy resin A, 5 g of brominated epoxy resin B, 0.9 g of phenoxy resin C, 0.1 g of 2-MI, and 90 g of modified Y-type hexagonal magnetic filler B.

[0078] The magnetodielectric resin composition is used for the preparation of a copper clad laminate, and the specific method is the same as that in Example 1 to obtain the copper clad laminate.

[0079] Example 3

[0080] This example provides a magnetodielectric resin composition, comprising 45 g of hydrocarbon resin, 5 g of BIPB initiator, and 50 g of modified Y-type hexagonal magnetic filler C.

[0081] The magnetodielectric resin composition is used for the preparation of a copper clad laminate, and the specific method is the same as that in Example 1 to obtain the copper clad laminate.

[0082] Example 4

[0083] This example provides a magnetodielectric resin composition, which is only different from that in Example 1 in that the mass of the modified Y-type hexagonal magnetic filler A is adjusted to 8 g.

[0084] The magnetodielectric resin composition is used for the preparation of a copper clad laminate, and the specific method is the same as that in Example 1 to obtain the copper clad laminate.

[0085] Example 5

[0086] This embodiment provides a magnetodielectric resin composition, which is only different from that of Example 2 in that the modified Y-type hexagonal magnetic filler B is replaced by the modified Y-type hexagonal magnetic filler D.

[0087] The magnetodielectric resin composition is used for the preparation of a copper clad laminate, and the specific method is the same as that of Example 1 to obtain the copper clad laminate.

[0088] Example 6

[0089] This embodiment provides a magnetodielectric resin composition, which is only different from that of Example 2 in that the mass of the composite hexagonal magnetic filler B is adjusted to 95 g.

[0090] The magnetodielectric resin composition is used for the preparation of a copper clad laminate, and the specific method is the same as that of Example 1 to obtain the copper clad laminate.

[0091] Comparative Example 1

[0092] This comparative example provides a magnetodielectric resin composition, which is only different from that of Example 2 in that the modified Y-type hexagonal magnetic filler B is replaced by the modified Y-type hexagonal magnetic filler E.

[0093] The magnetodielectric resin composition is used for the preparation of a copper clad laminate, and the specific method is the same as that of Example 1 to obtain the copper clad laminate.

[0094] Comparative Example 2

[0095] This comparative example provides a magnetodielectric resin composition, which is only different from that of Example 2 in that the modified Y-type hexagonal magnetic filler B is replaced by the modified Y-type hexagonal magnetic filler F.

[0096] The magnetodielectric resin composition is used for the preparation of a copper clad laminate, and the specific method is the same as that of Example 1 to obtain the copper clad laminate.

[0097] Comparative Example 3

[0098] This comparative example provides a magnetodielectric resin composition, which is only different from that of Example 2 in that the modified Y-type hexagonal magnetic filler B is replaced by the unmodified Y-type hexagonal magnetic filler BaCoFe6O 11 。

[0099] The magnetodielectric resin composition is used for the preparation of a copper clad laminate, and the specific method is the same as that of Example 1 to obtain the copper clad laminate.

[0100] Performance Test

[0101] (1) Sample preparation: Use a CNC milling machine to process the copper clad laminate into a circular sample (inner diameter 3.04 mm, outer diameter 6.96 mm, thickness 3 mm);

[0102] (2) The Keysight E5071C network analyzer + N1500 test system was used as the test instrument to measure the relative permeability and magnetic loss tangent of the material at 2 GHz.

[0103] According to the above performance test method, the performance of the copper clad laminates obtained in Examples 1-5 and Comparative Examples 1-3 was tested. The components of the magnetodielectric resin composition and the performance test results of the copper clad laminates containing it were summarized as shown in Table 2.

[0104] Table 2

[0105]

[0106]

[0107] Analysis:

[0108] As can be seen from Table 2, the copper clad laminates prepared in Examples 1-3 and Example 5 have relatively high permeability, low high-frequency loss, and good comprehensive performance.

[0109] From the data results of Example 4 and Example 1, it can be seen that if the addition ratio of the modified Y-type hexagonal filler is too low, the permeability will be small. From the data results of Example 6 and Example 2, it can be seen that if the addition ratio of the modified Y-type hexagonal filler is too high, the processability will be poor and qualified products cannot be prepared.

[0110] From the data results of Comparative Examples 1-2 and Example 2, it can be seen that if E and F modified Y-type hexagonal magnetic fillers with calcium carbonate and potassium feldspar components outside the preferred range are used, the magnetic loss tangent of the material at 2 GHz is high or the permeability is low.

[0111] From the data results of Comparative Example 3 and Example 2, it can be seen that when using unmodified Y-type hexagonal fillers, the relative permeability of the material at 2 GHz is low.

[0112] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A magnetodielectric resin composition, characterized in that, The magnetic dielectric resin composition includes a combination of a resin and modified Y-type hexagonal magnetic filler; The modified Y-type hexagonal magnetic filler is prepared by the following method, which includes: Co-firing the Y-type hexagonal magnetic filler, potassium-containing substance and calcium carbonate to obtain the modified Y-type hexagonal magnetic filler; The chemical formula of the Y-shaped hexagonal magnetic filler is BaMeFe6O 11 , where Me includes any one or a combination of at least two of Co, Ca, or Sr; The potassium-containing substance includes potassium feldspar and / or potassium carbonate; Based on the total mass of the Y-type hexagonal magnetic filler, potassium-containing substance and calcium carbonate being 100%, the mass fraction of the potassium-containing substance is 10-25%, and the mass fraction of the calcium carbonate is 5-20%.

2. The magnetodielectric resin composition according to claim 1, characterized in that, Based on the total mass of the magnetic dielectric resin composition being 100%, the mass fraction of the modified Y-type hexagonal magnetic filler is 20-90%; Preferably, the average particle size of the modified Y-type hexagonal magnetic filler is 0.1-30 μm.

3. The magnetodielectric resin composition according to claim 1 or 2, characterized in that, The raw materials for the co-firing further include a single metal oxide; Preferably, the single metal oxide includes any one or a combination of at least two of manganese oxide, zinc oxide, nickel oxide or copper oxide; Preferably, the temperature of the co-firing is 700-1300 °C; Preferably, the time of the co-firing is 2-8 h.

4. The magnetodielectric resin composition according to any one of claims 1 to 3, characterized in that, The resin includes any one or a combination of at least two of epoxy resin, cyanate resin, polyphenylene ether resin, polybutadiene resin, styrene-butadiene resin, bismaleimide-triazine resin, bismaleimide resin, polytetrafluoroethylene resin, polyimide resin, phenolic resin, acrylic resin, liquid crystal resin, benzoxazine resin, nitrile rubber, carboxyl-terminated nitrile rubber or hydroxyl-terminated nitrile rubber; Preferably, based on the total mass of the magnetic dielectric resin composition being 100%, the mass fraction of the resin is 10-80%; Preferably, the magnetic dielectric resin composition further includes a non-magnetic filler and a promoter; Preferably, the non-magnetic filler includes any one or a combination of at least two of silica, titanium dioxide, barium titanate, strontium titanate, magnesium titanate, calcium titanate, strontium barium titanate, barium calcium titanate, lead titanate, lead zirconate titanate, lanthanum lead zirconate titanate, barium lanthanum titanate, barium zirconium titanate, hafnium dioxide, lead magnesium niobate, barium magnesium niobate, lithium niobate, potassium niobate, strontium aluminum tantalate, potassium tantalum niobate, strontium barium niobate, barium lead niobate, barium titanium niobate, bismuth strontium tantalate, bismuth titanate, rubidium barium titanate, copper titanate or lead titanate-lead magnesium niobate; Preferably, the promoter includes any one or a combination of at least two of 2-methylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 2-undecylimidazole, 1-benzyl-2-methylimidazole, 2-heptadecylimidazole, 2-isopropylimidazole, 2-phenyl-4-methylimidazole, 2-dodecylimidazole or 1-cyanoethyl-2-methylimidazole; Preferably, the magnetic dielectric resin composition further includes an initiator; Preferably, the initiator includes any one or a combination of at least two of a,a'-bis(tert-butylperoxy-m-isopropylbenzene)benzene, dicumyl peroxide, tert-butylcumyl peroxide, 1,1-bis(tert-hexylperoxy)-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-di(tert-butylperoxy)hex-3-yne, tert-butyl octoate, tert-butyl peroxybenzoate, triethylamine, triethylamine salt compound, quaternary ammonium salt compound, 2,4,6-tris(dimethylaminomethyl)phenol, benzyldimethylamine, imidazoles, tripentylphenol amide, monophenol compound, polyphenol compound, boron trifluoride, complex of boron trifluoride and organic compound, phosphoric acid or triphenyl phosphite; Preferably, the magnetodielectric resin composition further includes a crosslinking agent; Preferably, the crosslinking agent includes any one or a combination of at least two of triallyl isocyanurate, poly(triallyl isocyanurate), triallyl cyanurate, trimethacrylic acid, diallyl phthalate, divinylbenzene or polyfunctional acrylate.

5. A resin glue solution, characterized in that, The resin glue solution includes the magnetodielectric resin composition according to any one of claims 1-4 and a solvent.

6. A prepreg, characterized in that, The prepreg includes a reinforcing material and the magnetodielectric resin composition according to any one of claims 1-4 attached to the reinforcing material; Preferably, the reinforcing material includes a glass fiber cloth.

7. A magnetic film, characterized in that, The magnetic film includes the magnetodielectric resin composition according to any one of claims 1-4.

8. A magnetic paste, characterized in that, The magnetic paste includes the magnetodielectric resin composition according to any one of claims 1-4.

9. A metal-clad laminate, characterized in that, The metal-clad laminate includes at least one prepreg according to claim 4, and at least one side surface of the stacked prepregs is coated with a metal foil.

10. A printed circuit board, characterized in that, The printed circuit board includes at least one of the prepreg according to claim 6 and the metal-clad laminate according to claim 9.

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