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CN-121990820-A - High-temperature low-loss material and preparation method and application thereof

CN121990820ACN 121990820 ACN121990820 ACN 121990820ACN-121990820-A

Abstract

The invention discloses a high-temperature low-loss material, a preparation method and application thereof. The high-temperature low-loss material comprises a main formula and an additive, wherein the main formula comprises Fe 2 O 3 52.55-52.7 mol%, mnO 38.4-40.45 mol%, and ZnO 7-8.9 mol%, and the additive comprises ：CaCO 3 0.12％～0.18％,ZrO 2 0.04％～0.055％,Nb 2 O 5 0.02％～0.04％,Co 2 O 3 0.46％～0.52％. the high-temperature low-loss material according to the invention, wherein the high-temperature low-loss material is tested under the condition of 100kHz 200mT, the 130 ℃ loss is less than 330kW/m 3 , the 150 ℃ loss is less than 350kW/m 3 , and the 160 ℃ loss is less than 385kW/m 3 based on the total weight of the main formula.

Inventors

  • LV DONGHUA
  • ZHANG LIKANG
  • JIN JIJUN

Assignees

  • 横店集团东磁股份有限公司

Dates

Publication Date
20260508
Application Date
20241108

Claims (10)

  1. 1. The high-temperature low-loss material is characterized by comprising a main formula and additives, wherein the main formula comprises the following components: Fe 2 O 3 52.55mol%~52.7mol% MnO 38.4mol%~40.45mol% ZnO 7mol%~8.9mol%; Based on the total weight of the main formula, the additive comprises the following components:
  2. 2. the high temperature low loss material according to claim 1, wherein said additive is added after said main formulation is mixed and presintered to produce a presintered material.
  3. 3. A method for producing the high-temperature low-loss material according to claim 1 or 2, characterized in that the method comprises the steps of: (1) Mixing the components in the main formula and then performing primary sanding to obtain first slurry; (2) Adding glue solution into the first slurry, and then performing spray granulation to obtain a precursor; (3) Presintering the precursor to obtain presintering materials; (4) Mixing the presintered material with each component in the additive, and performing secondary sanding to obtain second slurry; (5) And adding the glue solution into the first slurry, and then performing spray granulation and sintering to obtain the high-temperature low-loss material.
  4. 4. The method for preparing the high-temperature low-loss material according to claim 3, wherein in the primary sanding process in the step (1), the mass ratio of the material to the ball to the water is 1 (6-8): (0.4-0.7); preferably, the time of the primary sanding in the step (1) is 75 minutes to 100 minutes.
  5. 5. The method for preparing the high-temperature low-loss material according to claim 3 or 4, wherein the mass concentration of the glue added in the step (2) is 7% -9%; Preferably, in the step (2), the adding amount of the glue is 8% -12% of the mass of the main formula.
  6. 6. The method for producing a high-temperature low-loss material according to any one of claims 3 to 5, wherein the temperature of the pre-firing treatment in step (3) is 800 ℃ to 880 ℃; Preferably, the time of the pre-sintering treatment in the step (3) is 1-3 h.
  7. 7. The method for preparing the high-temperature low-loss material according to any one of claims 3 to 6, wherein in the secondary sanding process in the step (4), the mass ratio of the material to the ball to the water is 1 (5 to 7): (0.3 to 0.6); preferably, the mass concentration of the glue added in the step (5) is 7% -9%; preferably, in the step (5), the adding amount of the glue is 8% -12% of the mass of the main formula.
  8. 8. The method for producing a high-temperature low-loss material according to any one of claims 3 to 7, wherein the sintering temperature in step (5) is 1250 ℃ to 1300 ℃; preferably, the sintering time in the step (5) is 5-7 h.
  9. 9. A ferrite prepared by the method of any one of claims 3-8, wherein powder is pressed into a standard ring after spray drying in step (5), and the standard ring is sintered to obtain the ferrite; Preferably, the pressure adopted by the pressing is 4-8 MPa.
  10. 10. Use of the ferrite according to claim 9 for a vehicle-mounted charger, a vehicle-mounted DC/DC converter, an AC/DC converter, solar power generation or an outdoor power supply for a new energy vehicle.

Description

High-temperature low-loss material and preparation method and application thereof Technical Field The invention relates to the field of MnZn power ferrite, in particular to a high-temperature low-loss material, a preparation method and application thereof. Background In order to meet the requirements of energy conservation and emission reduction, the requirements of miniaturization and high efficiency of devices are better met, a lot of researches are carried out in the field of MnZn power ferrite, materials are updated, and the total main types of the newly developed materials are two, namely, non-wide temperature materials such as PC45, PC44 and PC47 developed by Japanese TDK company, and wide temperature materials such as PC95 developed by Japanese TDK company, 3C95 and 3C96 of Philips company. These materials are relatively high at Wen Sunhao under 100khz 200mt, with 100 ℃ loss for PC95 material at 350kW/m 3 and 140 ℃ loss for 3C96 material at 370kW/m 3. To further increase the efficiency of device operation at high temperatures, it is desirable to develop materials with lower losses from 130 ℃ to 160 ℃. CN112707723B discloses a wide-temperature ultra-low power consumption manganese zinc ferrite material and a preparation method thereof, wherein the ferrite material has 80 ℃ loss of 290kW/m 3, 100 ℃ loss of 300kW/m 3, 120 ℃ loss of 320kW/m 3 and 140 ℃ loss of 370kW/m 3 under the condition of 100khz 200 mt. CN115385677B discloses a wide-temperature low-power consumption manganese zinc ferrite PF-2T material and a preparation process thereof, the ferrite PF-2T material has 120 ℃ loss of 269-295kW/m 3 under the condition of 100khz 200mt, but the manufacturing process is complex, composite particles are generated, the sectional presintering is carried out, the sintering temperature is controlled at 930-1050 ℃, thus being unfavorable for large-area popularization, not suitable for mass production and limited in yield. Therefore, the simple preparation method of the ferrite material is provided, the production cost is saved, mass production is realized, the ferrite material can better improve the working efficiency of the element in a high-temperature environment, and the ferrite material is a technical problem to be solved urgently at present. Disclosure of Invention Aiming at the problems in the prior art, the invention aims to provide a high-temperature low-loss material, and a preparation method and application thereof. In order to achieve the purpose, the technical scheme is as follows: In a first aspect, the present invention provides a high temperature low loss material, the raw materials of the high temperature low loss material include a main formulation and an additive, the main formulation includes the following components: Fe2O3 52.55mol%~52.7mol% MnO 38.4mol%~40.45mol% ZnO 7mol%~8.9mol%; Based on the total weight of the main formula, the additive comprises the following components: In the high-temperature low-loss material, the content of Fe 2O3 in the main formula is 52.55-52.7 mol%, such as 52.55mol%, 52.57mol%, 52.6mol%, 52.62mol%, 52.68mol% or 52.7mol%, and the like. If the content of Fe 2O3 exceeds 52.7mol%, the eddy current loss of the material is increased, the magnetocrystalline anisotropy constant K1 is increased, the hysteresis expansion coefficient lambda s is improved, and if the content of Fe 2O3 is lower than 52.55mol%, the loss valley point is greatly deviated and moves to high temperature, so that the loss is not reduced. In the high-temperature low-loss material, the MnO content in the main formula is 38.4-40.45 mol%, such as 38.4mol％、38.45mol％、38.5mol％、38.55mol％、38.6mol％、38.7mol％、38.8mol％、38.9mol％、39.05mol％、39.1mol％、39.2mol％、39.3mol％、39.4mol％、39.5mol％、39.6mol％、39.7mol％、39.8mol％、39.9mol％、40.0mol％、40.1mol％、40.2mol％、40.3mol％、40.4mol％ or 40.45 mol%. In the high-temperature low-loss material, the content of ZnO in the main formula is 7-8.9 mol%, such as 7.0mol％、7.1mol％、7.2mol％、7.3mol％、7.4mol％、7.5mol％、7.6mol％、7.7mol％、7.8mol％、7.9mol％、8.0mol％、8.1mol％、8.2mol％、8.3mol％、8.4mol％、8.5mol％、8.6mol％、8.7mol％、8.8mol％ or 8.9 mol%. In the high-temperature low-loss material, the content of CaCO 3 in the additive is 0.12% -0.18%, for example 0.12%, 0.13%, 0.14%, 0.15%, 0.16%, 0.17% or 0.18% based on the total weight of the main formula. The content of ZrO 2 in the additive is 0.04% -0.055%, for example 0.04%, 0.045%, 0.05% or 0.055% and the like. The content of Nb 2O5 in the additive is 0.02% -0.04%, for example 0.02%, 0.025%, 0.03%, 0.035% or 0.04%. The content of Co 2O3 in the additive is 0.46% -0.52%, for example 0.46%, 0.47%, 0.48%, 0.49%, 0.5%, 0.51% or 0.52% etc. According to the invention, the grain point is controlled to be more than 130 ℃ by regulating the proportion of Fe 2O3, mnO and ZnO in the raw materials, and meanwhile, the additives with specific types and contents are added, so that the magnetocrystalline anisotropy constant K1 is close to zero when the magnetostriction coefficient lam