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A sintering furnace for sintering silicon nitride ceramics and its working method

A technology for silicon nitride ceramics and sintering furnaces, which is applied in the field of sintering furnaces. It can solve the problems of alloy material recrystallization, uneven heating temperature, product hardness, and adverse effects on strength, so as to achieve continuous and uniform heating temperature and improve sintering efficiency. Facilitate the effect of mixing

Active Publication Date: 2022-05-17
宁波银瓷新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above schemes have the following disadvantages: 1) The uniformity of the sintering temperature cannot be ensured; 2) The non-uniform heating temperature may lead to recrystallization of the sintered alloy material, which will have an adverse effect on the hardness and strength of subsequent products.

Method used

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  • A sintering furnace for sintering silicon nitride ceramics and its working method
  • A sintering furnace for sintering silicon nitride ceramics and its working method
  • A sintering furnace for sintering silicon nitride ceramics and its working method

Examples

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Effect test

Embodiment 1

[0057] When the high-pressure gas passed into the pipeline device 4 does not reach the heating temperature;

[0058] Such as Figure 1~8 As shown, a sintering furnace for sintering silicon nitride ceramics is provided. The sintering furnace includes a furnace body 1 and a heating element 2. The heating element 2 is arranged inside the furnace body 1. The heating element 2 is an electric heating element, such as a carbon rod, a carbon tube The heating element 2 is fixedly connected in the furnace body 1 through a support frame, and the crucible 3 carried on the heating element 2 is arranged on the heating element 2 for heating. The sintering furnace for sintering silicon nitride ceramics also includes a A pipeline device 4 for transmitting high-pressure gas, wherein the pipeline device 4 is suitable for transmitting the high-pressure gas that has not reached the heating temperature to the lower part of the heating element 2 . The high-pressure gas that does not reach the heati...

Embodiment 2

[0064] When the high-pressure gas passed into the pipeline device 4 reaches the heating temperature;

[0065] Such as Figure 1~7 and Figure 9 As shown, a sintering furnace for sintering silicon nitride ceramics is provided. The sintering furnace includes a furnace body 1 and a heating element 2. The heating element 2 is arranged inside the furnace body 1. The heating element 2 is an electric heating element, such as a carbon rod, a carbon tube The heating element 2 is fixedly connected in the furnace body 1 through a support frame, and the crucible 3 carried on the heating element 2 is arranged on the heating element 2 for heating. The sintering furnace for sintering silicon nitride ceramics also includes a The pipeline device 4 for transmitting high-pressure gas, wherein the pipeline device 4 is suitable for transmitting the high-pressure gas to the lower part of the heating element 2 . The high-pressure gas is injected into the furnace body 1 through the pipeline device ...

Embodiment 3

[0078] The third embodiment is carried out on the basis of the above embodiments.

[0079] This embodiment provides a working method of a sintering furnace for sintering silicon nitride ceramics.

[0080]A plurality of guide chambers 53 are provided on the adjustment table 51, and each guide chamber 53 is adapted to a plugging vertical passage 5121 of a sealing chamber 512; A 45° inclined platform 5123 is set at the junction of the vertical blocking channel 5121 and the blocking horizontal channel 5122, and the 45° inclined platform 5123 ensures that the incident angle and the reflection angle are consistent, so that the high-pressure gas in the blocking cavity 512 can flow out; and the diversion cavity 53 includes a trapezoidal cavity 531 and a vertical cavity 532 that communicate with each other. The larger bottom surface of the trapezoidal cavity 531 communicates with the vertical cavity 532 , and the smaller bottom surface of the trapezoidal cavity 531 communicates with th...

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Abstract

The invention relates to a sintering furnace for sintering silicon nitride ceramics and a working method thereof, wherein the sintering furnace for sintering silicon nitride ceramics comprises a furnace body, a heating element arranged inside the furnace body and a heating element carried on the heating element. The crucible, the sintering furnace for sintering silicon nitride ceramics also includes a pipeline device for transmitting high-pressure gas, wherein the pipeline device is suitable for transmitting the high-pressure gas to the lower part of the heating element. It ensures continuous and uniform heating temperature and reduces the phenomenon of recrystallization of sintered alloy materials; when adding high-pressure gas to the furnace body through the pipeline device, cooperate with the wind control device to reduce the impact of high-pressure gas on the crucible, and at the same time make the crucible continuously Uniform heating, so that the material in the crucible fully reacts; through the temperature sensor installed on the furnace wall, the temperature inside the furnace body is detected, so that the high-pressure gas with a suitable temperature is selected to pass into the furnace body, and further cooperate with the wind control system.

Description

technical field [0001] The invention relates to a sintering furnace, in particular to a sintering furnace for sintering silicon nitride ceramics and a working method thereof. Background technique [0002] Chinese patent application number: CN202010613549.3 discloses a neodymium-iron-boron vacuum sintering furnace, including a furnace body, a vacuum pump, a cleaning device, a cooling device, a heating device, and a placement device. Divided into two spaces, the sintering chamber and the cooling chamber, the cleaning device and the heating device are arranged in the sintering chamber, the cooling device is arranged in the cooling chamber, the placing device is slidably clamped on the inner wall on the right side of the furnace body, and the placing device is equipped with There is a driving device, a furnace cover is provided on the sintering chamber and the cooling chamber, the furnace cover is pivotally connected to the furnace body, and the vacuum pump is respectively conne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B5/16F27B5/14F27B5/18
CPCF27B5/16F27B5/14F27B5/18F27B2005/161F27M2003/04
Inventor 杨文伍
Owner 宁波银瓷新材料有限公司
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