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High-performance soft magnetic ferrite for LED (light-emitting diode) lighting and display screen

A soft magnetic ferrite and LED lighting technology, applied in the field of MnZn ferrite materials and its preparation, can solve the problems of high power consumption and poor DC superposition performance, and achieve low porosity, excellent DC superposition characteristics, density high effect

Active Publication Date: 2014-05-28
SUZHOU GUANDA MAGNET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the commonly used ferrite materials for switching power supply transformers are in the 500KHZ, 50mT, 25-100°C temperature range, the magnetic flux rate drops from the initial 1800±25% to 430, and the power consumption is 80kw / m 3 left and right, that is, there are still common problems of high power consumption and poor DC superposition performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weighing: Accurately weigh 58mol% Fe 2 o 3 , 35mol% MnO (raw material is Mn 3 o 4 ), 7mol% ZnO, 2500ppm CaCO 3 , 2000ppm of Nb 2 o 5 , 1200ppm V 2 o 5 , Bi of 1000ppm 2 o 3 and 500ppm Cr 2 o 3 spare;

[0022] (2) Mixing and grinding: the weighed Fe 2 o 3 , MnO and ZnO were placed in a mixer with a rotation speed of 100 rpm and stirred for 20 minutes, and then the mixed material was placed in a vibration grinder with a vibration frequency of 80 times / min and a vibration amplitude of 3 mm for 30 minutes to obtain Mixed materials with an average particle size of 0.7 μm;

[0023] (3) Preparation of mixed slurry: add weighed CaCO to the above ground mixed material in sequence 3 , Nb 2 o 5 , V 2 o 5 、MoO 3 and Co 2 o 3 , pure water and dispersant 2.5 times the weight of the mixed material, and then grind at a speed of 70 rpm for 45 minutes to obtain a mixed solution with an average particle size of 0.65 μm, and finally add a concentration of 20% that...

Embodiment 2

[0027] (1) Weighing: Accurately weigh 54.3mol% Fe 2 o 3 , 33mol% MnO (raw material is Mn 3 o 4 ), 5.5mol% ZnO, 800ppm CaCO 3 , 500ppm of Nb 2 o 5 , 300ppm V 2 o 5 , Bi of 500ppm 2 o 3 and 300ppm Cr 2 o 3 spare;

[0028] (2) Mixing and grinding: the weighed Fe 2 o 3, MnO and ZnO were placed in a mixer with a rotating speed of 80 rpm and stirred and mixed for 20 minutes, and then the mixed material was placed in a vibration grinder with a vibration frequency of 80 times / min and a vibration amplitude of 3 mm for 30 minutes to obtain Mixed materials with an average particle size of 0.8 μm;

[0029] (3) Preparation of mixed slurry: add weighed CaCO to the above ground mixed material in sequence 3 , Nb 2 o 5 , V 2 o 5 、MoO 3 and Co 2 o 3 , pure water and dispersant 2.5 times the weight of the mixed material, and then grind at a speed of 80 rpm for 45 minutes to obtain a mixed solution with an average particle size of 0.7 μm, and finally add a concentration of 2...

Embodiment 3

[0033] (1) Weighing: Accurately weigh 56mol% Fe 2 o 3 , 34mol% MnO (raw material is Mn 3 o 4 ), 6mol% ZnO, 1500ppm CaCO 3 , 1200ppm Nb 2 o 5 , 900ppm V 2 o 5 , Bi of 800ppm 2 o 3 and 400ppm Cr 2 o 3 spare;

[0034] (2) Mixing and grinding: the weighed Fe 2 o 3 , MnO and ZnO were placed in a mixer with a rotation speed of 100 rpm and stirred and mixed for 10 minutes, and then the mixed material was placed in a vibration grinder with a vibration frequency of 80 times / min and a vibration amplitude of 3 mm for 20 minutes to obtain Mixed materials with an average particle size of 0.7 μm;

[0035] (3) Preparation of mixed slurry: add weighed CaCO to the above ground mixed material in sequence 3 , Nb 2 o 5 , V 2 o 5 、MoO 3 and Co 2 o 3 , pure water and dispersant 2.5 times the weight of the mixed material, and then grind at a speed of 60 rpm for 45 minutes to obtain a mixed solution with an average particle size of 0.6 μm, and finally add a concentration of 0.5 ...

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Abstract

The invention discloses a high-performance soft magnetic ferrite for LED lighting and a display screen. When the soft magnetic ferrite is at 500 KHz and 50 mT, the power loss is 65 to 75 kw / m<3> at the temperature of 100 DEG C, and the magnetic permeability is 600 to 700 at the temperature of 100 DEG C. The soft magnetic ferrite comprises a first component and a second component, wherein the first component comprises Fe2O3 (Ferric Oxide), MnO (manganese oxide) and ZnO (zinc oxide), and the second component comprises CaCO3 (Calcium carbonate), Nb2O5 (Niobium Pentoxide), V2O5 (vanadium pentoxide), Bi2O3 (Bismuth Trioxide) and Cr2O3 (Chromium sesquioxide). The high-performance soft magnetic ferrite disclosed by the invention has uniform microstructure, good consistency, low porosity, high density, and no heterophase, and further has excellent direct current superposition characteristic and low attrition rate, greatly improves device performances of an application magnetic core and provides effective help for adjustment of the LED lighting and display screen industrial structures and energy conservation and emission reduction in China.

Description

technical field [0001] The invention relates to the technical field of MnZn-based ferrite materials and their preparation, in particular to a high-performance soft ferrite for LED lighting and display screens. Background technique [0002] Soft ferrite is based on Fe 2 o 3 There are several types of ferrimagnetic oxides as the main component, such as Mn-Zn, Cu-Zn, Ni-Zn, etc. Among them, the resistivity of Mn-Zn ferrite is low, which is 1-10 ohm / meter, generally below 100kHZ The frequency is used, the output and consumption are the largest; the resistivity of Cu-Zn and Ni-Zn ferrite is 102-104 ohm / meter, and the loss in the radio frequency band of 100kHz-10 MHz is small, and it is mostly used in radio antenna coils, radio IF transformer. [0003] At present, with the development of LED energy-saving lighting, LED display screens, LCD TV display screens, etc. towards miniaturization, lightness, and multi-functionality, soft ferrite has been more and more widely used in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/38C04B35/622
Inventor 柯宇翔张晓明徐良保
Owner SUZHOU GUANDA MAGNET
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