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CN-119954506-B - Nickel-zinc ferrite material and preparation method and application thereof

CN119954506BCN 119954506 BCN119954506 BCN 119954506BCN-119954506-B

Abstract

The invention relates to a nickel-zinc ferrite material, a preparation method and application thereof. The nickel zinc ferrite material comprises main components and doping components, wherein the main components comprise Fe 2 O 3 , niO, znO and CuO, the doping components comprise Nd 2 O 3 , the doping components account for 0.001-0.005wt% of the main components, the total mass of the main components is 100wt%, the content of the Fe 2 O 3 is 64.32-66.12wt%, the content of the NiO is 8.89-9.91wt%, the content of the ZnO is 17.12-18.15wt%, and the content of the CuO is 6-10wt%. The invention ensures higher magnetic permeability and saturation magnetic induction intensity by regulating and controlling the composition and content of main components and doping components of the nickel-zinc ferrite material, and simultaneously effectively improves the Curie temperature and high-frequency impedance coefficient of the nickel-zinc ferrite material.

Inventors

  • Yu Haokang
  • LOU KAI
  • WANG XIAOJUN

Assignees

  • 横店集团东磁股份有限公司
  • 金华市磁盟知识产权服务有限公司

Dates

Publication Date
20260512
Application Date
20250217

Claims (20)

  1. 1. The nickel-zinc ferrite material is characterized by comprising a main component and a doping component, wherein the main component comprises Fe 2 O 3 , niO, znO and CuO, the doping component is Nd 2 O 3 , and the doping component accounts for 0.001-0.005wt% of the main component; The total mass of the main components is 100wt%, the content of Fe 2 O 3 is 64.32-66.12wt%, the content of NiO is 8.89-9.91wt%, the content of ZnO is 17.12-18.15wt%, and the content of CuO is 6-10wt%.
  2. 2. The nickel zinc ferrite material of claim 1, wherein the doping component comprises 0.003-0.004wt% of the main component.
  3. 3. The nickel zinc ferrite material of claim 1, wherein the nickel zinc ferrite material has a density of 4.5-5.5g/cm 3 .
  4. 4. The nickel zinc ferrite material of claim 1, wherein the nickel zinc ferrite material has a permeability of 883.9-996.3H/m.
  5. 5. The nickel zinc ferrite material of claim 1, wherein the nickel zinc ferrite material has a saturation induction of 374.8-380.8mT.
  6. 6. The nickel zinc ferrite material of claim 1, wherein the nickel zinc ferrite material has an impedance coefficient of 60.8-62.3 at 30 MHz.
  7. 7. The nickel zinc ferrite material of claim 1, wherein the nickel zinc ferrite material has an impedance coefficient of 74.6-76.6 at 50 MHz.
  8. 8. The nickel zinc ferrite material of claim 1, wherein the nickel zinc ferrite material has a curie temperature of 130-180 ℃.
  9. 9. The nickel zinc ferrite material of claim 8, wherein the nickel zinc ferrite material has a curie temperature of 160-180 ℃.
  10. 10. A method of preparing a nickel zinc ferrite material according to any one of claims 1 to 9, comprising the steps of: (1) Firstly mixing Fe 2 O 3 , niO, znO and CuO according to the formula amount, and then presintering to obtain a presintering mixed material; (2) And (3) carrying out second mixing on the presintered mixture, the Nd 2 O 3 with the formula amount and the binder, and carrying out compression molding and sintering to obtain the nickel-zinc ferrite material.
  11. 11. The method of claim 10, wherein the first mixing in step (2) is performed using a ball milling process.
  12. 12. The method of claim 10, wherein the first mixing in step (1) is for a period of 2-3 hours.
  13. 13. The method of claim 10, wherein the first mixture in step (1) is at a rotational speed of 300-500r/min.
  14. 14. The method of claim 10, wherein the first mixing of step (1) is followed by a first drying.
  15. 15. The method of claim 14, wherein the first dried product is further subjected to a first sieving.
  16. 16. The method of claim 15, wherein the first screen has a mesh size of 20-50 mesh.
  17. 17. The method of claim 10, wherein the pre-firing in step (1) is at a temperature of 800-850 ℃.
  18. 18. The method of claim 10, wherein the burn-in step (1) has a temperature increase rate of 1-3 ℃ per minute.
  19. 19. The method of claim 10, wherein the pre-firing time of step (1) is 1-3 hours.
  20. 20. The method of claim 10, wherein the second mixing step (2) comprises mixing the pre-sintered material with the Nd 2 O 3 , and granulating the mixed product with a binder to obtain a mixture.

Description

Nickel-zinc ferrite material and preparation method and application thereof Technical Field The invention relates to the technical field of magnetic materials, in particular to a nickel-zinc ferrite material and a preparation method and application thereof. Background With the development of electronic power technology, the development of electronic devices is a necessary trend toward miniaturization, high frequency and large current, and therefore, the performance requirements for soft magnetic materials in electronic devices are also increasing. The NiZn soft magnetic ferrite has the advantages of excellent high-frequency characteristic, good temperature stability, various formulas, large nonlinearity, simple preparation process and the like, and is widely applied to the fields of televisions, communications, instruments, automatic control, electronic countermeasure and the like. The NiZn ferrite material is classified into three major categories of high frequency, high saturation induction and high initial permeability according to the purpose and characteristics, but there are unavoidable drawbacks, for example, in order to make the high-impedance NiZn ferrite material have higher permeability, the content of ZnO in the material must be increased, which results in a great reduction in curie temperature, and the high permeability can reduce the cut-off frequency, and the impedance reduction is obvious at a frequency of tens of mhz. The prior art CN115925405A discloses a high permeability Gao Juli temperature NiCuZn soft magnetic ferrite material, the main component of which comprises Fe 2O3:66.22-68.65 wt%, znO 18.30-22.15 wt%, niO 7.75-9.85 wt%, and the balance CuO, the doping component comprises Y 2O3、MoO3、V2O5 and MnCO 3, wherein Y 2O3 is 0.05-0.1 wt% of the main component, moO 3 is 0.06-0.18 wt% of the main component, V 2O5 is 0.05-0.15 wt% of the main component, mnCO 3 is 0.55wt% of the main component, the initial permeability is 2011, the specific loss coefficient is 28.78X10 -6, the Curie temperature is 145 ℃, the saturation magnetic induction strength Bs=mTmTsMt10A/m, the ferrite material disclosed in the prior art has extremely high initial permeability, and if the ferrite material is used for vehicle-mounted articles with the vehicle-mounted temperature of which is required to reach the higher Curie temperature of 160 ℃ but cannot reach the higher Curie temperature of 400 ℃ at the vehicle-mounted temperature. CN109320227 discloses a NiCuZn ferrite material, its preparation method and application. The NiCuZn ferrite material mainly comprises Fe 2O3, znO, niO and CuO, wherein the total molar quantity of the NiCuZn ferrite material is 100%, the molar percentage of Fe 2O3 is 48.8-50 mol%, the molar percentage of ZnO is 32-34 mol%, the molar percentage of NiO is 6.5-8 mol%, the molar percentage of CuO is 8.5-12.7 mol%, the initial permeability of the prepared NiCuZn ferrite material is 1600-2000 within the range of 100-300 kHz, the saturated magnetic induction intensity Bs is more than or equal to 240mT at 25 ℃, the Curie temperature is 95-110 ℃, and the ferrite material disclosed in the prior art also has higher initial permeability, but the saturated magnetic induction intensity is low, is not applicable to common mode circuits, and the Curie temperature is only 110 ℃ and can be applied to the field. Therefore, how to provide a nickel-zinc ferrite material with high magnetic permeability, saturation induction, curie temperature and impedance coefficient at the same time has become a problem to be solved. Disclosure of Invention In order to solve the technical problems, the invention aims to provide a nickel-zinc ferrite material and a preparation method and application thereof. The invention ensures higher magnetic permeability and saturation induction intensity and simultaneously effectively improves the Curie temperature and high-frequency impedance coefficient of the nickel-zinc ferrite material by regulating and controlling the composition and content of main components and doping components in the nickel-zinc ferrite material. To achieve the purpose, the invention adopts the following technical scheme: In a first aspect, the present invention provides a nickel zinc ferrite material, the nickel zinc ferrite material comprising a main component and a doping component, the main component comprising Fe 2O3, niO, znO and CuO, the doping component comprising Nd 2O3, the doping component accounting for 0.001-0.005wt% of the main component; The total mass of the main components is 100wt%, the content of Fe 2O3 is 64.32-66.12wt%, the content of NiO is 8.89-9.91wt%, the content of ZnO is 17.12-18.15wt%, and the content of CuO is 6-10wt%. In the present invention, the doping component accounts for "0.001-0.005wt%" of the main component, for example, 0.001wt%, 0.0015wt%, 0.002wt%, 0.0025wt%, 0.003wt%, 0.0035wt%, 0.004wt%, 0.0045wt%, or 0.005wt%, etc.; the Fe 2O3 is selected from the range of "64.32-66.12