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

Method for sintering Mn-Zn ferrite with high density and high saturation induction density

A technology of magnetic induction intensity and sintering method, which is applied in the direction of magnetism of inorganic materials to achieve the effect of reducing consumption, reflecting economy and saving energy

Inactive Publication Date: 2012-09-12
CHANGSHU XINLI MAGNETIC IND
View PDF7 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The industry is making unremitting research and exploration on this, but the successful application is limited to the experimental muffle furnace and bell furnace with periodic work, and there has not been any successful or even reference report in the tunnel furnace so far.

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
  • Method for sintering Mn-Zn ferrite with high density and high saturation induction density
  • Method for sintering Mn-Zn ferrite with high density and high saturation induction density
  • Method for sintering Mn-Zn ferrite with high density and high saturation induction density

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The outer diameter is 29.25mm, the inner diameter is 17.5mm and the thickness is 10mm, and the pressing density is 3-3.05g / cm 3 The ring-shaped Mn-Zn ferrite blank is sintered in a continuous tunnel kiln as an example.

[0023] please see figure 1 , which shows the temperature and oxygen partial pressure curves of the continuous tunnel kiln for the aforementioned Mn-Zn ferrite blank during the heating and sintering process. The whole sintering method includes a heating stage, a heat preservation stage and a cooling stage, as follows:

[0024] The heating and sintering stage includes that the Mn-Zn ferrite blank passes through the first zone, the second zone and the third zone of the kiln hearth in sequence, and in the first zone, the heating rate is 85 ° C / hour (also called the heating rate, the same below). ) from room temperature to 1050°C, the sintering atmosphere in the first zone is air, and the oxygen partial pressure is 21%; in the second zone, the temperatur...

Embodiment 2

[0027] sketches.

[0028] The heating stage includes that the Mn-Zn ferrite blank passes through the first zone, the second zone and the third zone of the kiln furnace in sequence. The sintering atmosphere is air, and the oxygen partial pressure is 22%. 3 The flow rate of / h introduces nitrogen into this second district, makes the oxygen partial pressure of this second district at 0.3%, and the length of this second district is 1.8m, and the speed of Mn-Zn ferrite blank passing through this district is 1.62m / h; In the third zone, the temperature is raised from 1150°C to 1330°C at a rate of 170°C / h, and the oxygen partial pressure in the third zone is controlled by 1%. Keep warm at 1330°C for 5 hours to form a heat preservation stage. The oxygen partial pressure in the heat preservation stage is controlled at 2%. After the heat preservation is over, it enters the cooling stage. The partial pressure control is reduced from 2% to 0.01%, and then the temperature is reduced from...

Embodiment 3

[0031] sketches.

[0032] The heating stage includes that the Mn-Zn ferrite blank passes through the first zone, the second zone and the third zone of the kiln furnace in turn, and the temperature is raised from room temperature to 1050 ℃ at a heating rate of 110 ℃ / h in the first zone, and the sintering in the first zone The atmosphere is air, and the oxygen partial pressure is 20%. 3 The flow rate of / h introduces nitrogen into this second district, makes the oxygen partial pressure of this second district at 0.1%, and the length of this second district is 1.9m, and the speed of Mn-Zn ferrite blank passing through this district is 1.52m / h; in the third area, the temperature is raised from 1150 °C to 1345 °C at a heating rate of 125 °C / h, the oxygen partial pressure in the third area is controlled at 2.5%, and the temperature is maintained at 1345 °C for 3 hours to form a heat preservation stage, and the oxygen partial pressure in the heat preservation stage is controlled a...

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

PropertyMeasurementUnit
Outer diameteraaaaaaaaaa
The inside diameter ofaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for sintering an Mn-Zn ferrite with high density and high saturation induction density, belonging to the technical field of preparing soft-magnetic ferrites, comprising a heating stage, a heat preservation stage, and a cooling stage, wherein the heating stage is characterized by letting a ferrite blank pass through Zone One, Zone Two and Zone Three of a kiln successively, heating up to 1050 DEG C with the heating rate of 80-150 DEG C / h in the Zone One, heating up to 1150 DEG C with the heating rate of 70-100 DEG C and simultaneously letting in nitrogen in the Zone Two, and heating up to 1300-1350 DEG C with the heating rate of 120-180 DEG C / h and controlling the oxygen partial pressure; the heat preservation stage is characterized by preserving heat at 1300-1350 DEG C; and the cooling stage is characterized by cooling from 1300-1350 DEG C to 1000 DEG C with the cooling rate of 80-120 DEG C / h, and then cooling from 1000 DEG C to 150 DEG C with the cooling rate of 120-200 DEG C / h, and then discharging. The method has the advantages of raising the density, initial magnetic permeability and saturation magnetic flux density, saving energy, and reducingthe nitrogen consumption.

Description

technical field [0001] The invention belongs to the technical field of soft ferrite preparation, and in particular relates to a sintering method of Mn-Zn ferrite with high density and high saturation magnetic induction. Background technique [0002] The concepts of high density and high saturation magnetic induction mentioned above are relative to the density and saturation magnetic induction of the Mn-Zn series power ferrite in the prior art. The Mn-Zn series power ferrite in the prior art The density of oxygen body is usually 4.7-4.8×10 3 kg / m 3 , and the saturation magnetic induction is usually 500-506mT, and the initial permeability is usually 2200-2500, so the Mn-Zn series ferrite that can significantly improve these technical indicators is called high-density high saturation magnetic induction Mn-Zn series power ferrite. [0003] With the rapid development of network communications, household appliances and IT products, the requirements for electronic components are...

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
IPC IPC(8): C04B35/64C04B35/26H01F1/34
Inventor 王荣杰付龙龙
Owner CHANGSHU XINLI MAGNETIC IND