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CN-118754637-B - Manganese zinc ferrite material and preparation method and application thereof

CN118754637BCN 118754637 BCN118754637 BCN 118754637BCN-118754637-B

Abstract

The invention provides a manganese-zinc ferrite material, a preparation method and application thereof, wherein the manganese-zinc ferrite material can enable initial magnetic permeability mu i to be more than 1837H/m, saturated magnetic induction strength Bs at 25 ℃ to be more than 572mT and saturated magnetic induction strength Bs at 100 ℃ to be more than 487mT through specific arrangement of a formula, so that the power conversion efficiency of an electronic element is improved.

Inventors

  • GE WEIKANG
  • CHEN XIAOFEI
  • ZHU XIAOLI
  • LI KAIXUAN

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
20240723

Claims (20)

  1. 1. A manganese-zinc-ferrite material, characterized in that the manganese-zinc-ferrite material comprises a main component and an auxiliary component; The main component comprises 63.64-66mol% of Fe 2 O 3 , 16.51-17mol% of ZnO and the balance of Mn 3 O 4 , and the auxiliary component comprises 8000-9000ppm of NiO, 200-800ppm of CaCO 3 , 300-400ppm of MoO 3 , 100-300ppm of ZrO 2 , 200-500ppm of Nb 2 O 5 and 100-500ppm of V 2 O 5 based on the mass of the main component.
  2. 2. A method of preparing the manganese-zinc-ferrite material of claim 1, comprising the steps of: (1) Mixing the preparation raw materials of the main components according to the formula amount, and then performing presintering treatment to obtain a presintering material; (2) Mixing auxiliary components and the presintered material obtained in the step (1) according to the formula amount, and crushing to obtain powder; (3) And (3) granulating, forming and sintering the powder obtained in the step (2) to obtain the manganese zinc ferrite material.
  3. 3. The method according to claim 2, wherein the burn-in treatment in step (1) has a temperature rise rate of 2 to 5 ℃.
  4. 4. The method according to claim 2, wherein the temperature of the pre-firing treatment in step (1) is 800 to 850 ℃.
  5. 5. The method according to claim 2, wherein the pre-firing treatment in step (1) is performed for a period of 2 to 4 hours.
  6. 6. The method of claim 2, wherein the pre-firing treatment in step (1) is followed by air cooling.
  7. 7. The method according to claim 2, wherein the oxygen content is controlled to be 1 to 21vol% at the time of sintering in the step (3).
  8. 8. The method of claim 2, wherein the sintering temperature in step (3) is 1350-1450 ℃.
  9. 9. The method of claim 2, wherein the sintering in step (3) comprises a first sintering and a second sintering performed sequentially.
  10. 10. The method according to claim 9, wherein the oxygen content is controlled to be 19 to 21vol% at the time of the first sintering.
  11. 11. The method of claim 9, wherein the first sintering temperature is 1350-1400 ℃.
  12. 12. The method of claim 9, wherein the first sintering is for a period of time ranging from 5 to 8 hours.
  13. 13. The method according to claim 9, wherein the oxygen content is controlled to be 1 to 5vol% at the time of the second sintering.
  14. 14. The method of claim 9, wherein the second sintering temperature is 1350-1400 ℃.
  15. 15. The method of claim 9, wherein the second sintering is performed for a period of 1-2 hours.
  16. 16. The method of claim 2, wherein the method of mixing in step (1) comprises wet ball milling.
  17. 17. The method of claim 2, wherein the method of mixing of step (2) comprises wet sanding.
  18. 18. The process according to claim 2, wherein the powder in step (2) has a particle size X50 of 1.3 to 1.55. Mu.m.
  19. 19. The preparation method according to claim 2, characterized in that the preparation method comprises the steps of: (1) The preparation raw materials of the main components are mixed by wet ball milling according to the formula amount for 20-60min, then the temperature is raised to 800-850 ℃ at the temperature rising rate of 2-5 ℃ per min for presintering treatment for 2-4h, and air cooling is carried out to obtain the presintering material; the wet ball milling is carried out in a planetary ball mill, the frequency of the planetary ball mill is 40-60Hz, and the rotating speed is 200-300r/min; (2) Mixing auxiliary components and the pre-sintered material obtained in the step (1) according to the formula amount by wet sand grinding, and crushing to obtain powder with the particle size X50 of 1.3-1.55 mu m; the wet sand milling is carried out in a planetary ball mill, the frequency of the planetary ball mill is 40-60Hz, and the rotating speed is 200-300r/min; (3) Granulating, forming and sintering the powder obtained in the step (2) to obtain the manganese zinc ferrite material; The sintering comprises a first sintering and a second sintering which are sequentially carried out; Controlling the oxygen content to be 19-21vol% during the first sintering, controlling the temperature to be 1350-1400 ℃ and controlling the time to be 5-8h; And controlling the oxygen content to be 1-5vol% during the second sintering, wherein the temperature is 1350-1400 ℃ and the time is 1-2h.
  20. 20. Use of the manganese-zinc-ferrite material according to claim 1, characterized in that the manganese-zinc-ferrite material is used in electronic components.

Description

Manganese zinc ferrite material and preparation method and application thereof Technical Field The invention belongs to the technical field of soft magnetic ferrite materials, relates to a soft magnetic ferrite material and a preparation method and application thereof, and in particular relates to a manganese zinc ferrite material and a preparation method and application thereof. Background To meet the development requirements of power electronics, the characteristics of ferrite materials need to be further improved. Firstly, in order to meet the miniaturization requirement of electronic products, the ferrite material must have a higher saturation magnetic flux density Bs, secondly, in order to effectively reduce the loss introduced by the coil, the ferrite material must have a higher magnetic permeability mu i, and thirdly, in order to reduce the influence caused by the temperature change of the working environment, the electromagnetic performance of the device can be stably exerted, and the ferrite material must have good temperature stability. Therefore, it is required to make the manganese-zinc-ferrite material have high magnetic permeability, high saturation magnetic flux density and good stability, but it is difficult to make the three reach a good balance. CN101620908a discloses a manganese-zinc ferrite material with ultra-high saturation magnetic flux density and a preparation method thereof, which realizes ultra-high Bs with over 500mT at high temperature of 100 ℃ by limiting the content of ferric oxide to 63mol% -67mol%, the content of zinc oxide to 11mol% -16mol% and auxiliary components CaCO 3、SiO2、Nb2O5、ZrO2 and NiO, but the overall permeability of the manganese-zinc ferrite material under the formula system is only 800H/m. CN117024158a discloses a high Bs ferrite material and a preparation method, by limiting the content of ferric oxide to 65mol% -66mol%, the content of nickel oxide to 15.5mol% -16.5mol% and the content of copper oxide to 4mol% -5mol%, 25 ℃ saturation magnetic flux density of 488mT is realized, but the addition amount of NiO in the formula is larger, and the production cost of the ferrite material is increased. CN110171964a discloses a high Bs high strength manganese zinc ferrite material and a preparation method thereof, by limiting the content of ferric oxide to 57.5mol% -62.5mol%, the content of zinc oxide to 11mol% -14mol%, auxiliary components CaCO 3、SiO2、MoO3、ZrO2、V2O5 and SnO, bs at 25 ℃ is 596mT, bs at 100 ℃ is 490mT, but there is a further rising space for Bs and temperature stability. Therefore, in order to obtain a manganese-zinc ferrite material with high initial permeability, high saturation induction and low cost, a manganese-zinc ferrite material, a preparation method and application thereof are needed. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide a manganese-zinc ferrite material, a preparation method and application thereof, wherein the manganese-zinc ferrite material can enable initial magnetic permeability mu i to be more than 1837H/m, saturated magnetic induction strength Bs to be more than 572mT at 25 ℃ and saturated magnetic induction strength Bs to be more than 487mT at 100 ℃ through specific arrangement of a formula, so that the power conversion efficiency of an electronic element is improved. To achieve the purpose, the invention adopts the following technical scheme: in a first aspect, the present invention provides a manganese zinc ferrite material comprising a main component and an auxiliary component; The preparation raw materials of the main component comprise 62-66mol% of Fe 2O3, 14-17mol% of ZnO and the balance of Mn 3O4; The auxiliary components comprise 8000-9000ppm of NiO, 200-800ppm of CaCO 3, 300-900ppm of MoO 3, 100-300ppm of ZrO 2, 200-500ppm of Nb 2O5 and 100-500ppm of V 2O5 by mass of the main components. The manganese-zinc ferrite material provided by the invention can enable the initial magnetic permeability mu i to be more than 2000H/m, the saturated magnetic induction strength Bs at 25 ℃ to be more than 610mT and the saturated magnetic induction strength Bs at 100 ℃ to be more than 500mT through the specific arrangement of the formula, so that the power conversion efficiency of the electronic element is improved. The proper amount of Fe 2O3 can make proper amount of Fe 3O4 generated by the device play a positive λs compensation role, and proper amount of Zn ions can dilute the coupling effect of magnetic ions, so that the mu i value is effectively improved. In the present invention, the molar percentage of Fe 2O3 in the raw material for the production of the main component is 62 to 66mol%, for example, 62mol%, 63mol%, 64mol%, 65mol% or 66mol%, but not limited to the values listed, and the other values not listed in the numerical range are applicable as well, preferably 63 to 64mol%, while in the raw material for the production of the main component, the molar percentage of Zn