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NiCuZn ferrite material and manufacturing method thereof

A technology of ferrite materials and main components, applied in NiCuZn series ferrite materials with high magnetic permeability and low loss and its manufacturing field, can solve the problem of large material loss, unfavorable use of NFC antenna modules, small, thin and Lighten the problems of development and achieve the effect of high magnetic permeability and small magnetic loss

Active Publication Date: 2015-12-30
东莞成电创新电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But generally speaking, materials with high magnetic permeability also have large losses, which is not conducive to the use in NFC antenna modules
[0003] At present, in the existing technology, the magnetic permeability is mostly controlled at about 100. Although it can meet the requirements of use, it is still low, which hinders the development of devices in the direction of small, thin and light.

Method used

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  • NiCuZn ferrite material and manufacturing method thereof
  • NiCuZn ferrite material and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0022] Embodiment 1-5, see table 1:

[0023] Using the sol-gel method, the raw material H 3 BO 3 , Bi(NO 3 ) 3 ·5H 2 O, Si(OC 2 h 5 ) 4 , Zn(CH 3 COO) 2 follow B 2 o 3 : Bi 2 o 3 :SiO2:ZnO molar ratio of 27:35:6:32 Synthetic glass powder A (BBSZ).

[0024] Take by weighing the initial raw material Fe according to the mole percentage of each component in Table 1 2 o 3 , ZnO, CuO, NiO and Co 2 o 3 , placed in a vibrating mill for dry mixing and vibrating for 1 hour.

[0025] The mixed dry powder is pre-fired in a sintering furnace at 900°C for 2 hours to obtain a preliminary reacted pre-fired powder.

[0026] Add 0.5wt% powder A and 0.2wt% SnO to the pre-fired powder 2 , and 0.2wt% Ta 2 o 5 , and mix and grind the mixture with deionized water until the average particle size of the powder is 1.0um, sieve after drying, and then add PVA solution to granulate.

[0027] Put the granulated powder in a designated mold, and press it into a magnetic ring under a pre...

Embodiment 6-12

[0034] Embodiment 6-12, see table 2:

[0035] Using the sol-gel method, the raw material H 3 BO 3 , Bi(NO 3 ) 3 ·5H 2 O, Si(OC 2 h 5 ) 4 , Zn(CH 3 COO) 2 follow B 2 o 3 : Bi 2 o 3 : SiO 2 : ZnO molar ratio of 18:30:12:40 synthetic glass powder A (BBSZ).

[0036] Weigh the initial raw material Fe by mole percentage 2 o 3 : 49.0mol%, ZnO: 27.0mol%, CuO: 5.0mol%, NiO: 18.7mol% and Co 2 o 3 : 0.3mol%, put into a vibration mill for dry mixing and vibration grinding for 1h.

[0037]The mixed dry powder is pre-fired in a sintering furnace at 900°C for 2 hours to obtain a preliminary reacted pre-fired powder.

[0038] Add different amounts of glass powder A and powder B to the pre-fired powder, see Table 2, where B is Ta 2 o 5 , SiO 2 , SnO 2 One or two of them, and then mix and grind the mixture with deionized water until the average particle size of the powder is 1.0um, sieve after drying, and then add PVA solution to granulate.

[0039] Put the granulated po...

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Abstract

The invention discloses a NiCuZn ferrite material and a preparation method thereof. The ferrite material comprises a main component and an additive. The main component is composed of 47-49 mol% of Fe2O3, 15-22 mol% of NiO, 25-30 mol% of ZnO, 4-7 mol% of CuO and 0.1-0.5 mol% of Co2O3. The additive is composed of A and B, wherein A accounts for 0.1-0.5 wt% of the whole material, and B accounts for 0.1-0.5 wt% of the whole material. A is BBSZ glass; and B is one or two of Ta2O5, SiO2 and SnO2. The nickel-zinc ferrite soft magnetic material disclosed by the invention has the characteristics of high initial permeability and low loss; under the frequency of 13.56 MHz, mu' is greater than 150, and mu' is less than 2; and the nickel-zinc ferrite soft magnetic material is very suitable for producing NFC (near field communication) ferrite magnetic sheets by an LTCC (low temperature co-fired ceramic) running technique.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic ferrites, in particular to a NiCuZn series ferrite material with high magnetic permeability and low loss for NFC antennas and a manufacturing method thereof. Background technique [0002] In the application of 13.56MHz RFID electronic tags, the electronic tags need to be attached to the metal surface or near the position, so that during the identification process, the signal strength is greatly weakened by the attenuation of the metal eddy current, resulting in the failure of the reading process. Therefore, a thin magnetic sheet needs to be added In order to reduce the eddy current effect, the higher the magnetic permeability of the magnetic sheet, the better the conduction effect. But generally speaking, materials with high magnetic permeability also have large losses, which is not conducive to the use in NFC antenna modules. [0003] At present, in the existing technology, the magnetic pe...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/63
Inventor 陈鲁国康建宏李广新
Owner 东莞成电创新电子科技有限公司
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