Magnetic ring sintering process and sintering furnace

A sintering furnace and process technology, applied in the direction of furnace, furnace cooling, charge and other directions, can solve the problems of sintering atmosphere that cannot form a cycle, uneven heating of products, and poor utilization of heat energy, etc., to improve the cooling effect and improve the utilization of heat energy. rate, and the effect of inhibiting high temperature volatilization

Inactive Publication Date: 2020-07-03
常德玉峰磁电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the sintering of magnetic rings in the prior art is generally high-temperature sintering, the zinc element is easy to volatilize during high-temperature sintering, and this affects the magnetic permeability and electrical properties of the magnetic rings, especially the manganese-zinc magnetic rings; In the bell jar kiln used for sintering magnetic rings, the product is heated unevenly, the utilization rate of heat energy is not good, and it is impossible to form a circulating sintering atmosphere

Method used

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  • Magnetic ring sintering process and sintering furnace
  • Magnetic ring sintering process and sintering furnace
  • Magnetic ring sintering process and sintering furnace

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Embodiment 1

[0029] The magnetic ring sintering process of the present embodiment adopts such as Figure 1-5 The vacuum high-temperature bell jar kiln shown is used as a sintering furnace. First, the temperature in the sintering furnace is raised from room temperature to 1350-1400°C at a rate of 1.8-2.0°C / min. During the heating period, the sintering atmosphere of the sintering furnace is controlled in a conventional manner. , the sintering atmosphere is a nitrogen atmosphere with an oxygen content of 0.5%, and then keep it warm for 6-7h. During the cooling period, the sintering atmosphere of the sintering furnace is also controlled in a conventional manner. The sintering atmosphere is still a nitrogen atmosphere with an oxygen content of 0.5%. Finally, the temperature in the sintering furnace is lowered to 300°C in stages to complete the cooling. The cooling rate is 1.25-1.35°C / min.

Embodiment 2

[0031] The magnetic ring sintering process of the present embodiment adopts such as Figure 1-5 The vacuum high-temperature bell jar kiln shown is used as a sintering furnace. First, the temperature in the sintering furnace is raised from room temperature to 1350-1400°C at a rate of 2.0-2.5°C / min. During the heating period, the sintering atmosphere of the sintering furnace is controlled in a conventional manner. , the sintering atmosphere is a nitrogen atmosphere with an oxygen content of 35%, and then keep it warm for 6-7h. During the cooling period, the sintering atmosphere of the sintering furnace is also controlled in a conventional manner. The sintering atmosphere is still a nitrogen atmosphere with an oxygen content of 35%. Finally, the temperature in the sintering furnace is lowered to 300°C in stages to complete the cooling. The cooling rate is 1.35-1.65°C / min.

Embodiment 3

[0033] The magnetic ring sintering process of the present embodiment adopts such as Figure 1-5 The vacuum high-temperature bell jar kiln shown is used as a sintering furnace. First, the temperature in the sintering furnace is raised from room temperature to 1350-1400°C at a rate of 2.0-2.5°C / min. During the heating period, the sintering atmosphere of the sintering furnace is controlled in a conventional manner. , the sintering atmosphere is a nitrogen atmosphere with an oxygen content of 0.5%, and then keep it warm for 6-7 hours. During the cooling period, the sintering atmosphere of the sintering furnace is also controlled in a conventional manner. The sintering atmosphere is still a nitrogen atmosphere with an oxygen content of 35%. Finally, the temperature in the sintering furnace is lowered to 300°C in stages to complete the cooling. The cooling rate is 1.35-1.65°C / min.

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Abstract

The invention discloses a magnetic ring sintering process and a sintering furnace. A vacuum high-temperature bell jar kiln is adopted as the sintering furnace, firstly, the sintering furnace is pre-vacuumized, the temperature in the sintering furnace is increased to 1350-1400 DEG C, then heat preservation is conducted for 6-7 h, pure oxygen is introduced into the sintering furnace in the heat preservation period, and the sintering furnace is cooled to the room temperature; then the temperature in the sintering furnace is reduced to 1200 DEG C, and the sintering atmosphere of the sintering furnace is controlled in a conventional mode in the heating period and the cooling period; and finally, the temperature in the sintering furnace is reduced to 300 DEG C, and cooling is completed. According to the magnetic ring sintering process, the magnetic conductivity of the magnetic ring is improved, the formation of crystal grains in the sintering process is facilitated, and the electrical performance of the product is improved.

Description

technical field [0001] The invention relates to the technical field of magnetic ring processing, specifically designing a magnetic ring sintering process and a sintering furnace. Background technique [0002] The magnetic ring is a ring-shaped magnetic conductor. The magnetic ring is an anti-interference component commonly used in electronic circuits. It has a good suppression effect on high-frequency noise. It is generally made of ferrite and is mainly used to manufacture high-frequency transformers, inductors, noise filter etc. With the development of the electronics industry, the requirements for the performance of magnetic materials are also getting higher and higher. Therefore, improving and improving the performance of the magnetic ring to meet market demand has become the focus of research and development personnel. [0003] The main processing flow of the magnetic ring is: feeding→mixing→molding→sintering→grinding→spraying and drying, etc., among which sintering is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B11/00F27D7/06F27D9/00F27D17/00F27D1/12F27D3/00H01F41/02
CPCF27B11/00F27D1/12F27D3/00F27D7/06F27D9/00F27D17/004F27D2003/0086F27D2007/066F27D2009/0005F27D2009/0072F27M2003/04H01F41/02
Inventor 赵波
Owner 常德玉峰磁电科技有限公司
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