Method for sintering manganese zinc ferrite magnetic material in combination of microwave and electric heating

A technology of manganese-zinc ferrite and magnetic materials, which is applied in the field of microwave electric heating combined sintered manganese-zinc ferrite magnetic materials, can solve the problems of high production cost, uneven heating, product cracking, etc., and achieve shortened drainage Glue time, shorten heating time, and ensure the effect of qualified rate

Active Publication Date: 2014-02-12
无锡富爱特磁电科技有限公司
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common disadvantages of the above two sintering methods are: first, they all use the traditional silicon carbon rod or silicon molybdenum rod heating method. The heat transfer direction of this heating method is from outside to inside, which has nothing to do with the heated material It is well used to heat the special magnetic material of manganese zinc ferrite. In addition, when the energy is transferred in this heating method, the surface of the heated material is heated first, which not only does not heat uniformly, but also leads to a large amount of energy loss. In the heating environment, that is, the heat treatment of the substance completely depends on the thermal effect; the second is that the temperature control curve of the existing heating method is very unreasonable, so that the substance cannot be well drained and degummed during the early heating process, resulting in cracking of the product and distortion are serious, and the substance cannot be well crystallized and formed during the mid-term heating and post-cooling process, which will also make it difficult to guarantee and improve the final pass rate of the product. In addition, the existing heating method has a long heating time, Higher energy consumption and higher production costs

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 manganese zinc ferrite magnetic material in combination of microwave and electric heating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Depend on figure 1 As shown, the method of sintering manganese-zinc-ferrite magnetic materials by microwave electric heating combination is as follows: firstly, use microwave heating method for 0.4 hours to raise the temperature from room temperature to 180 ℃, and then keep the temperature for 1.8 hours. No pressure, pump air to realize the drainage process of the substance; then use microwave heating method to raise the temperature to 380°C for 0.4 hours, and then keep the temperature for 1.8 hours, there is no pressure in the furnace during this process, pump air to realize the drainage and debinding of the substance process; then use the traditional silicon carbon rod heating method to raise the temperature to 780°C in 3.8 hours, the oxygen content in the furnace is controlled at 1800PPM during this process, and then use the traditional silicon molybdenum rod heating method to raise the temperature to 1180°C in 1.8 hours. In this process, the oxygen content in the fu...

Embodiment 2

[0018] Depend on figure 1 As shown, the method of sintering manganese-zinc-ferrite magnetic materials by microwave electric heating combination is as follows: firstly, use microwave heating method to raise the temperature from room temperature to 210°C for 0.6 hours, and then keep the temperature for 2.1 hours. No pressure, pump air to realize the drainage process of the substance; then use microwave heating method to raise the temperature to 410°C for 0.6 hours, and then keep the temperature for 2.1 hours, there is no pressure in the furnace during this process, pump air to realize the drainage and debinding of the substance process; then use the traditional silicon carbon rod heating method to raise the temperature to 810°C in 4.2 hours, the oxygen content in the furnace is controlled at 2200PPM during this process, and then use the traditional silicon molybdenum rod heating method to raise the temperature to 1210°C in 2.1 hours. In this process, the oxygen content in the fu...

Embodiment 3

[0020] Depend on figure 1 As shown, the method of sintering manganese-zinc-ferrite magnetic materials by microwave electric heating combined method is as follows: firstly, use microwave heating method for 0.5 hours to raise the temperature from room temperature to 200°C, and then keep the temperature for 2 hours. No pressure, pump air to realize the drainage process of the substance; then use microwave heating for 0.5 hours to raise the temperature to 400°C, and then keep the temperature for 2 hours, there is no pressure in the furnace during this process, pump air to realize the drainage and debinding of the substance process; then use the traditional silicon carbide rod heating method to raise the temperature to 800°C for 4 hours, the oxygen content in the furnace is controlled at 2000PPM during this process, and then use the traditional silicon molybdenum rod heating method to raise the temperature to 1200°C for 2 hours. In this process, the oxygen content in the furnace is...

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 discloses a method for sintering a manganese zinc ferrite magnetic material in combination of microwave and electric heating. The sintering method comprises the following steps: firstly, raising the temperature from room temperature to 180-210 DEG C by adopting a microwave heating mode, keeping the temperature, heating to 380-410 DEG C by adopting the microwave heating mode, then keeping the temperature, heating to 780-810 DEG C by adopting a traditional silicon carbide rod heating mode, heating to 1180-1210 DEG C by adopting a traditional silicon molybdenum rod heating mode, then raising the temperature to 1330-1380 DEG C by adopting the microwave heating mode, keeping the temperature, cooling to below 150 DEG C, and then discharging. The method has the advantages that the heating time is greatly shortened, the aim of saving energy and reducing consumption is achieved, and the high pass percent of the product is effectively guaranteed; the method is suitable for sintering of the manganese zinc ferrite magnetic material.

Description

technical field [0001] The present invention relates to the technical field of sintering methods, more specifically to the technical field of sintering manganese zinc ferrite magnetic materials. Background technique [0002] At present, the production process of manganese zinc ferrite magnetic materials mainly includes batching, pressing, sintering and dimension processing, among which the sintering process is an important part of the whole process. There are two main sintering methods generally used now: one is The ladle furnace is used for sintering by traditional silicon carbide rod or silicon molybdenum rod intermittent heating method, and the other is to use the tunnel pusher kiln for sintering by traditional silicon carbon rod or silicon molybdenum rod continuous heating method. The common disadvantages of the above two sintering methods are: first, they all use the traditional silicon carbon rod or silicon molybdenum rod heating method. The heat transfer direction of ...

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): C04B35/622C04B35/26C04B35/38
Inventor 何东福
Owner 无锡富爱特磁电科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap