Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of low-temperature sintered Ni-Zn-Cu soft magnetic ferrite material

A soft ferrite, low-temperature sintering technology is applied in the field of preparation of soft ferrite materials, which can solve the problems of reduced sintering stability, segregation of main components, reduced magnetic permeability, etc., and achieves increased production cycle, cost, and stability. Good, dense effect

Inactive Publication Date: 2012-07-11
SHENZHEN SUNLORD ELECTRONICS
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But CuO, Bi 2 o 3 , V 2 o 5 The addition of sintering aids such as sintering aids will lead to the following disadvantages: the chemical composition of the sintering aids is different from that of Ni Zn ferrite; increasing the composition of the material formula will easily cause the segregation of the main components; the liquid phase formed during the sintering process will aggravate the migration of Ag, which will The sintering stability of the material is reduced, and the magnetic permeability is reduced
Through this preparation method, the magnetic permeability and quality factor of the material can be improved, and the amount of sintering aid can be reduced under the condition of obtaining the same density, but this method may aggravate component segregation, reduce the sintering stability of the material, and the rapid cooling The process has higher requirements on the equipment, which increases the production cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of low-temperature sintered Ni-Zn-Cu soft magnetic ferrite material
  • Preparation method of low-temperature sintered Ni-Zn-Cu soft magnetic ferrite material
  • Preparation method of low-temperature sintered Ni-Zn-Cu soft magnetic ferrite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The present embodiment provides a method for preparing a low-temperature sintered NiZnCu soft ferrite material, comprising the following steps:

[0030] A. The raw material Fe 2 O 3 , NiO, ZnO, CuO and Bi 2 O 3 Pulverized to an average particle size of 1.0±0.1 μm.

[0031] B. Fe pulverized in step A 2 O 3 , NiO, ZnO and CuO are mixed according to the following mole percentages:

[0032]

[0033] The mixture a was obtained, and the initial ball milling was carried out, the ball mill rotating speed was 45 rev / min, and the ball milling time was 24 hours.

[0034] C. Dry the mixture a after the primary ball milling, the drying temperature is 150° C., and the drying time is 48 hours, and the powder after the drying is sieved with 80 meshes for the first time.

[0035] D. Pre-fire the powder after the initial sieving at 850 ° C for 2 hours to obtain a ferrite mixed powder with a normal spinel structure, and pulverize the obtained ferrite mixed powder with a normal s...

Embodiment 2

[0040] The present embodiment provides a method for preparing a low-temperature sintered NiZnCu soft ferrite material, comprising the following steps:

[0041] A. The raw material Fe 2 O 3 , NiO, ZnO, CuO and Bi 2 O 3 Pulverized to an average particle size of 1.0±0.1 μm.

[0042] B. Fe pulverized in step A 2 O 3 , NiO, ZnO and CuO are mixed according to the following mole percentages:

[0043]

[0044] The mixture a was obtained, and the initial ball milling was carried out, the ball mill rotating speed was 45 rev / min, and the ball milling time was 24 hours.

[0045] C. Dry the mixture a after the primary ball milling, the drying temperature is 150°C, the drying time is 48 hours, and the powder after the drying is 80 mesh sieved for the first time.

[0046] D. Pre-fire the powder after the initial sieving at 850 ° C for 2 hours to obtain a ferrite mixed powder with a normal spinel structure, and pulverize the obtained ferrite mixed powder with a normal spinel structu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a preparation method of low-temperature sintered Ni-Zn-Cu soft magnetic ferrite material, and the method comprises the following steps of: grinding raw materials, namely Fe2O3, NiO, ZnO, CuO and Bi2O3; carrying out primary ball milling on Fe2O3, NiO, ZnO and CuO; drying and carrying out primary sieving; presintering and then grinding; adding CuO and Bi2O3 for secondary ball milling; and finally, drying and carrying out secondary sieving, thus obtaining the low-temperature sintering Ni-Zn-Cu soft magnetic ferrite material. The preparation method of the low-temperature sintered Ni-Zn-Cu soft magnetic ferrite material has the technical advantages that the low-temperature sintered Ni-Zn-Cu soft magnetic ferrite material which is better in stability, higher in density and higher in magnetic conductivity can be provided for a multilayer chip inductor, and the production cycle and the cost are not increased, so that the preparation method is suitable for industrialized popularization.

Description

technical field [0001] The invention relates to a preparation method of a soft ferrite material, in particular to a preparation method of a low temperature sintered NiZnCu soft ferrite material. Background technique [0002] The key process technology for the fabrication of laminated chip inductors is the co-firing of the magnetic dielectric material and the inner conductor material. Since almost all of the inner electrode conductors used in industrial production use Ag (961.93°C) with a lower melting point, the magnetic medium material is required to be sintered at a temperature lower than the melting point of Ag. At present, in order to reduce the sintering temperature of the material, the soft ferrite material with NiZnCu as the matrix is ​​used as the magnetic medium material of this type of laminated chip inductor at home and abroad. Adding a certain amount of CuO can form a solid solution to reduce NiZn ferrite. The sintering temperature of the bulk material. In addi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 胡斐王其艮戴春雷
Owner SHENZHEN SUNLORD ELECTRONICS