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Manganese-zinc ferrite with high saturation flux density, wide temperature range and low magnetic core loss, preparation method of manganese-zinc ferrite and application of potassium tetrafluoroaluminate

A technology of magnetic induction and manganese-zinc ferrite, which is applied in the manufacture of inductors/transformers/magnets, magnetic objects, magnetic materials, etc., can solve the problems that manganese-zinc ferrite cannot be applied and the power loss is large

Active Publication Date: 2021-07-09
CHONGQING SHANGJIA ELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The magnetic induction (Bs) of MnZn ferrite in the prior art can also reach about 600mT (1000A / m, 100°C at 50Hz), but there is a huge power loss (≥1200mW / cm 3 ) defects, so that these manganese zinc ferrites cannot be applied in industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A manganese-zinc ferrite with high saturation magnetic induction and wide temperature low core loss, made of Fe 2 o 3 : 60.5mol; Mn 3 o 4 : 22.5mol; ZnO: 20.5mol and doping ingredients.

[0026] The percentages of each doping component and their addition to the sum of the weight of all main raw materials are: CaCO 3 0.01wt%, TiO 2 0.01%, NiO 0.01wt%, Nb 2 o 5 0.10wt%, Li 2 CO 3 0.08wt%, Bi 2 o 3 0.01wt%, Co 2 o 3 0.01wt%, KAlF 4 1 wt%.

[0027] Lubricant zinc stearate 0.5wt% and binder polyvinyl alcohol solution 8wt%.

[0028] Prepare as follows:

[0029] (1) One-time sanding: Weigh the required Fe 2 o 3 , Mn 3 o 4 , ZnO, Fe 2 o 3 , Mn 3 o 4 1. The particle size of the ZnO powder is 0.84-1.36 μm. Put it into a sand mill and stir it thoroughly, add distilled water, carry out wet sand grinding, and then dry it. The sanding time for one time is 120 minutes.

[0030] (2) Calcination: precalcine the powder after primary sanding at 750°C to 950°C for 1 h...

Embodiment 2

[0035] A manganese-zinc ferrite with high saturation magnetic induction and wide temperature low core loss, made of Fe 2 o 3 : 70.5mol; Mn 3 o 4 : 15.5mol; ZnO: 10.5mol and doping ingredients.

[0036] The percentages of each doping component and their addition to the sum of the weight of all main raw materials are: CaCO 3 0.09wt%, TiO 2 0.09%, NiO 0.09wt%, Nb 2 o 5 0.03wt%, Li 2 CO 3 0.01wt%, Bi 2 o 3 0.06wt%, Co 2 o 3 0.07wt%, KAlF 4 5wt%.

[0037] Lubricant zinc stearate 0.1wt% and binder polyvinyl alcohol solution 12wt%.

[0038] Prepare as follows:

[0039] (1) One-time sanding: Weigh the required Fe 2 o 3 , Mn 3 o 4 , ZnO, Fe 2 o 3 , Mn 3 o 4 1. The particle size of the ZnO powder is 0.84-1.36 μm. Put it into a sand mill and stir it thoroughly, add distilled water, perform wet sand grinding and then dry it. The time for one sand grinding is 50 minutes.

[0040] (2) Calcination: Precalcining the powder after primary sanding at 750°C to 950°C for 6 ...

Embodiment 3

[0045] A manganese-zinc ferrite with high saturation magnetic induction and wide temperature low core loss, made of Fe 2 o 3 : 65.5mol; Mn 3 o 4 : 15mol; ZnO: 15mol and doping ingredients.

[0046] The percentages of each doping component and their addition to the sum of the weight of all main raw materials are: CaCO 3 0.05wt%, TiO 2 0.04%, NiO 0.04wt%, Nb 2 o 5 0.06wt%, Li 2 CO 3 0.05wt%, Bi 2 o 3 0.02wt%, Co 2 o 3 0.03wt%, KAlF 4 3 wt%.

[0047] Lubricant zinc stearate 0.2wt% and binder polyvinyl alcohol solution 10wt%.

[0048] Prepare as follows:

[0049] (1) One-time sanding: Weigh the required Fe 2 o 3 , Mn 3 o 4 , ZnO, Fe 2 o 3 , Mn 3 o 4 1. The particle size of the ZnO powder is 0.84-1.36 μm. Put it into a sand mill and stir it thoroughly, add distilled water, carry out wet sand grinding, and then dry it. The sanding time for one time is 80 minutes.

[0050] (2) Calcination: Precalcining the powder after primary sanding at 750°C to 950°C for 4 h...

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Abstract

The invention discloses a manganese-zinc ferrite with high saturation flux density, wide temperature range and low magnetic core loss, a preparation method of the manganese-zinc ferrite and application of potassium tetrafluoroaluminate. The manganese-zinc ferrite is prepared from the following main raw materials in parts by mole: 60.5-70.5 mol parts of Fe2O3, 15.5-22.5 mol parts of Mn3O4, 10.5-20.5 mol parts of ZnO and doping components. The percentages of the doping components and their addition amount to the total weight of all main raw materials are respectively: CaCO3 0.01-0.09 wt%, TiO2 0.01-0.09 wt%, NiO 0.01-0.09 wt%, Nb2O5 0.03-0.10 wt%, Li2CO3 0.01-0.08 wt%, Bi2O3 0.01-0.06 wt%, Co2O3 0.01-0.07 wt% and KAlF4 1-5 wt%. The sintering compactness of the manganese-zinc ferrite is improved, and the Bs of the material is improved; through doping modification, the Curie temperature of the manganese-zinc ferrite is improved, and the Pcv of the manganese-zinc ferrite is reduced.

Description

technical field [0001] The invention relates to a manganese-zinc ferrite with high saturation magnetic induction intensity, wide temperature and low magnetic core loss, a preparation method thereof and application of potassium tetrafluoroaluminate, belonging to the field of soft magnetic ferrite materials. Background technique [0002] Manganese zinc ferrite, as the soft magnetic ferrite material with the largest output and the most widely used in the middle and low frequency band, is made of aMnFe with spinel structure 2 o 4 ·bZnFe 2 o 4 Cubic system with a small amount of Fe 3 o 4 A single-phase solid solution composed of mixed crystals. The symmetry of the crystal structure of manganese zinc ferrite is very high, and it has many excellent magnetic properties and power loss, such as low coercive force, small magnetic crystal anisotropy constant, high initial permeability, high saturation magnetic induction, and high cut-off frequency. Low temperature, good temperatur...

Claims

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Application Information

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IPC IPC(8): C04B35/38C04B35/622C04B35/64H01F1/34H01F41/02
CPCC04B35/2616C04B35/2633C04B35/265C04B35/622C04B35/64H01F1/344H01F41/02C04B2235/445C04B2235/3263C04B2235/3284C04B2235/3208C04B2235/3232C04B2235/3251C04B2235/3279C04B2235/3203C04B2235/3298C04B2235/3275C04B2235/5445C04B2235/5436C04B2235/6583C04B2235/656C04B2235/6567C04B2235/763
Inventor 符靓黎树春谢华林廖新仁马俊才赵飞张伟鹏
Owner CHONGQING SHANGJIA ELECTRONICS