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Nickel-copper-zinc ferrite material with high surface resistance for panel display

A nickel-copper-zinc ferrite, flat-panel display technology, applied in the direction of inorganic material magnetism, etc., can solve the problem of high surface resistance of inverter magnetic core materials, and achieve the effect of low cost and simple process

Inactive Publication Date: 2013-03-20
NANJING JINNING SANHUAN FDK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the unconventional development of large-screen flat-panel displays, under the dual promotion of cost reduction and energy-saving requirements, the design technology of LCD backlight inverters has broken through the traditional mode of one lamp with one transformer, and has rapidly developed two lamps. A new mode of transformer, and this new mode requires the surface resistance of the inverter core material to be higher. The MnZn ferrite material usually used in the past can no longer meet this requirement because the surface resistance is usually around 100kΩ.

Method used

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  • Nickel-copper-zinc ferrite material with high surface resistance for panel display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Ingredients: Fe with a purity of 99.5% was weighed respectively 2 o 3 , NiO with a purity of 99.8%, ZnO with a purity of 99.8% and CuO with a purity of 99.7%, the molar ratio of the four is 49.00:18.05:28.10:4.85;

[0021] (2) Primary ball milling: put the powder into a ball mill jar according to the mass ratio of ball:material:water=2:1:1, and then wet mill in a ball mill. The ball milling time is 35 minutes, and the rotation speed is 400r / min;

[0022] (3) Pre-burning: put the ball-milled powder into a resistance furnace for pre-burning, the pre-burning temperature is 900°C, and the holding time is 1 hour;

[0023] (4) Secondary ball milling and mixing of auxiliary components: weigh the pre-burned powder (100% by mass) and auxiliary components: chemically pure TiO 2 (0.01wt%), SnO 2 (0.04wt%), V 2 o 5 (0.01wt%), ZrO 2 (0.1wt%), SiO 2 (0.01wt%), CaO (0.04wt%) and MnO 2 (0.1wt%) is put into ball mill jar, and the mass percent of secondary component is the m...

Embodiment 2

[0028] (1) Ingredients: Fe with a purity of 99.6% was weighed respectively 2 o 3, NiO with a purity of 99.7%, ZnO with a purity of 99.8% and CuO with a purity of 99.8%, the molar ratio of the four is 49.50:17.75:27.85:4.90;

[0029] (2) Primary ball milling: the main components are loaded into a ball mill jar according to the mass ratio of ball:material:water=2:1:1, and then wet milled in a ball mill. The ball milling time is 30 minutes, and the rotation speed is 500r / min;

[0030] (3) Pre-burning: put the ball-milled powder into a resistance furnace for pre-burning, the pre-burning temperature is 800°C, and the holding time is 4h;

[0031] (4) Secondary ball milling and mixing of auxiliary components: weigh the pre-burned powder (according to 100%) and auxiliary components: chemically pure TiO 2 (0.03wt%), SnO 2 (0.02wt%), V 2 o 5 (0.04wt%), ZrO 2 (0.4wt%), SiO 2 (0.02wt%), CaO (0.02wt%) and MnO 2 (0.35wt%) is put into ball mill jar, and the mass percent of secondary...

Embodiment 3

[0036] (1) Ingredients: Fe with a purity of 99.3% was weighed respectively 2 o 3 , NiO with a purity of 99.6%, ZnO with a purity of 99.7% and CuO with a purity of 99.8%, the molar ratio of the four is 50.00:17.55:27.50:4.95;

[0037] (2) Primary ball milling: put the powder into a ball mill jar according to the mass ratio of ball:material:water=2:1:1, and then wet mill in a ball mill. The ball milling time is 40 minutes, and the rotation speed is 600r / min;

[0038] (3) Pre-burning: Put the ball-milled powder into a resistance furnace for pre-burning, the pre-burning temperature is 850°C, and the holding time is 3h;

[0039] (4) Secondary ball milling and mixing of auxiliary components: weigh the pre-burned powder (according to 100%) and auxiliary components: chemically pure TiO 2 (0.02wt%), SnO 2 (0.01wt%), V 2 o 5 (0.03wt%), ZrO 2 (0.5wt%), SiO 2 (0.03wt%), CaO (0.01wt%) and MnO 2 (0.65wt%) is put into ball mill jar, and the mass percent of minor component is the mas...

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Abstract

The invention discloses a nickel-copper-zinc ferrite material with high surface resistance for panel display, which is made of primary components and auxiliary components. The primary components consist of the following substances: 49.00-50.00 mol% of Fe2O3 (ferric oxide), 27.50-28.10 mol% of ZnO (zinc oxide), 4.85-4.95 mol% of CuO (cupric oxide) and NiO (nickel oxide) as the rest, and by using the sum of the masses of all the primary components, the auxiliary components comprise 0.01-0.03 wt% of TiO2 (titanium dioxide), 0.01-0.04 wt% of SnO2 (stannic oxide), 0.01-0.04 wt% of V2O5 (vanadium pentoxide) and 0.1-0.5 wt% of ZrO2 (zirconium dioxide). The nickel-copper-zinc ferrite material has the surface resistance which is not less than 320000 megohms, the room-temperature power consumption which is lower than 250 kw / m3, the high-temperature power consumption which is lower than 180 kw / m3 and the room-temperature saturated magnetic flux density which is more than 400 mT.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic ferrite materials in electronic materials, and in particular relates to a nickel-copper-zinc ferrite material with high surface resistance for flat panel display. Background technique [0002] The development of flat panel display technology represented by liquid crystal display puts forward many new requirements for power ferrite materials and their magnetic cores. Not only the material is required to have the low power consumption characteristics required by common power ferrite materials, but also the ferrite material is required to have high voltage resistance performance. Currently, MnZn power ferrite materials are generally used. With the unconventional development of large-screen flat-panel displays, under the dual promotion of cost reduction and energy-saving requirements, the design technology of LCD backlight inverters has broken through the traditional mode of one lamp with one tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/34C04B35/26
Inventor 何秀桥仲崇玉傅红卫杨锭
Owner NANJING JINNING SANHUAN FDK