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Electric field-assisted ceramic material sintering furnace and control method thereof

A ceramic material, electric field assisted technology, used in furnace control devices, electric furnace heating, furnaces, etc., can solve the problems of high sintering temperature, high energy consumption, long sintering time, etc., to reduce the sintering temperature of ceramics, achieve densification, and save energy. The effect of loss

Inactive Publication Date: 2019-02-19
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies of the existing technology, the object of the present invention is to provide a ceramic material sintering furnace and its control method assisted by an electric field, which solves the problem of high energy consumption of conventional ceramic sintering furnaces with high sintering temperature and long sintering time

Method used

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  • Electric field-assisted ceramic material sintering furnace and control method thereof
  • Electric field-assisted ceramic material sintering furnace and control method thereof
  • Electric field-assisted ceramic material sintering furnace and control method thereof

Examples

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Effect test

Embodiment 1

[0052] This embodiment provides a ceramic material sintering furnace assisted by an electric field, which includes a tube furnace 1 with a shell on the outside, and a time and furnace temperature control unit on the shell. The tube furnace can be realized through the time and furnace temperature control unit. According to the presetting of the heating program of the body, the prepared PZT ceramic powder is uniaxially pressed into a cylindrical shape, and the two ends are coated with platinum slurry for use. Put the PZT ceramic sample coated with platinum paste on the front end of the alumina ceramic tube 2 on one side, and a platinum sheet 6 is installed at the front end, and lightly stick the sample on the platinum sheet 6, and the platinum wire 7 passes through the ceramic tube 2 and the platinum sheet 6 connected, the other end stretches out the ceramic tube 2, the spring 8 is placed between the ceramic tube 2 and the support frame 51, one end is against the step of the cera...

Embodiment 2

[0055] This embodiment provides a ceramic material sintering furnace assisted by an electric field. The difference between this embodiment and Embodiment 1 is that the sample to be processed is made of Al 2 o 3 For ceramic materials, the applied voltage is set to 1400V through the electric field applying device 3, and the final furnace temperature is 1400°C.

[0056] Figure 5 Al is prepared for sintering under this condition 2 o 3 From the SEM photo of the ceramic, it can be seen that the sample has been completely densified. Compared with the traditional sintering method, adopting the sintering furnace provided by the present invention, Al 2 o 3 The sintering temperature of the ceramic material is reduced by about 300°C, and the sintering time is reduced from several hours to 30s.

Embodiment 3

[0058] This embodiment provides a ceramic material sintering furnace assisted by an electric field. The difference between this embodiment and Embodiment 1 is that the sample to be processed is made of KNN ceramic material, and the applied voltage is set to 1400V by the electric field application device 3, and the final furnace temperature is 750°C.

[0059] Image 6 SEM photos of KNN ceramics prepared by sintering under this condition, it can be seen that the samples are completely densified. Compared with the traditional sintering method, with the sintering furnace provided by the present invention, the sintering temperature of the KNN ceramic material is reduced by about 300°C, and the sintering time is reduced from several hours to 30s.

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Abstract

The invention provides an electric field-assisted ceramic material sintering furnace and a control method thereof. The sintering furnace comprises a tubular furnace, a clamping device, an electric field application module and a data observation and recording module; the clamping device comprises two pipe bodies; the two ends of the two pipe bodies are sealed and are arranged in the two ends of thetubular furnace respectively through corresponding supporting devices; the opposite ends of the two pipe bodies are each provided with an electrode; and one electrode, the data observation and recording module, the electric field application module and the other electrode are sequentially connected in series through wires. The pipe bodies with conducting parts are arranged in the two ends of thetraditional tubular furnace. During the sintering process, an external electric field is applied, so that the sintering densification process of ceramic material can be greatly promoted, then low-temperature flash sintering of the ceramic material, namely, the densification of the ceramic material within dozens of seconds at low temperature is realized; and the sintering temperature of ceramics isfinally reduced, the sintering time of the ceramics is shortened, and the energy loss is greatly saved.

Description

technical field [0001] The invention belongs to the technical field of ceramic sintering preparation, and relates to a sintering furnace, in particular to a ceramic material sintering furnace assisted by an electric field and a control method thereof. Background technique [0002] The sintering furnace is a kind of sintering furnace that makes the solid particles of the ceramic green body bond with each other at high temperature, the grain grows, the pores decrease, the total volume shrinks, the density increases, and finally becomes a dense polycrystalline sintered body with a certain microstructure. stove. [0003] At present, when conventional sintering furnaces are used to sinter ceramic materials, external heat sources, such as resistance wires, are often used to heat through convection. However, these methods require high temperature conditions and long-term heat preservation treatment. This sintering furnace can The consumption is large, and the cost of sintered cera...

Claims

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Application Information

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IPC IPC(8): F27B17/00F27D11/10F27D11/12F27D19/00
CPCF27B17/0075F27D11/10F27D11/12F27D19/00F27D2019/0037
Inventor 苏兴华贾勇杰韩晨曦吴亚娟白鸽王振军胡钰玮
Owner CHANGAN UNIV
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