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Ceramic sintering method and ceramic sintering device

A sintering method and a sintering device technology, which are applied in the direction of furnace control devices, electric furnace heating, furnaces, etc., can solve problems such as fracture of flash-fired samples, increase of current, and inability to realize integrated ceramic sintering

Active Publication Date: 2020-07-24
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, low-temperature flashing faces the dilemma of limited conditions: for a fixed green body-electrode structure, if the temperature required for flashing is to be further reduced, the voltage must be continuously increased to increase the pressure, but this also increases the time for flashing to occur. The current passing through the flashed sample, too much current will cause the flashed sample to break
In addition, neither conventional sintering technology nor flash firing technology can achieve integrated ceramic sintering

Method used

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  • Ceramic sintering method and ceramic sintering device
  • Ceramic sintering method and ceramic sintering device
  • Ceramic sintering method and ceramic sintering device

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Embodiment 1

[0070] see image 3 , in this embodiment, the ceramic sintering device 10 includes two second electrodes, which are respectively the second electrode 171 and the second electrode 172, and the first electrode 14, the second electrode 171 and the second electrode 172 are spaced from each other and arranged at equal intervals. The surface of the "dog bone" shaped ceramic green body 30 is insulated from each other, wherein the first electrode 14 and the second electrode 172 are respectively fixed at the two ends of the ceramic green body 30; the ceramic powder forming the ceramic green body 30 is an average particle size Zinc oxide powder with a diameter of 30nm, the cubic size between the electrodes at both ends of the ceramic green body 30 is 13mm×3.3mm×0.8mm, and the power supply 12 adopts a commercial frequency AC power supply.

[0071] During the first sintering period, the switch module 13 controls the first voltage output by the power source 12 to be applied to the first el...

Embodiment 2

[0076] see Figure 6 , in this embodiment, the ceramic sintering device 10 includes two second electrodes, which are respectively the second electrode 181 and the second electrode 182, and the first electrode 14, the second electrode 181 and the second electrode 182 are spaced from each other and arranged at equal intervals. The surface of the ceramic green body 40 is insulated from each other, wherein the ceramic green body 40 is cylindrical, the first electrode 14 and the second electrode 182 are respectively fixed on the two ends of the ceramic green body 30, and the size of the ceramic green body 40 is 10 mm in diameter and 80 mm in height ; The ceramic green body 40 is made of zinc oxide powder with an average particle size of 30nm; the power supply 12 adopts a power frequency AC power supply.

[0077]In the ceramic sintering method of this embodiment, in step S3, during the first sintering period, the power supply 12 outputs the first voltage and the second voltage, and ...

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Abstract

The invention provides a ceramic sintering method. The ceramic sintering method comprises the following steps: obtaining a ceramic green body; arranging a first electrode and at least two second electrodes which are spaced from each other to the ceramic green body; and applying a first voltage to the first electrode, and applying a second voltage to the at least two second electrodes in a time-sharing manner to sinter the ceramic green body. The invention further provides a ceramic sintering device.

Description

technical field [0001] The invention relates to the technical field of ceramic sintering, in particular to a ceramic sintering method and a ceramic sintering device used in the ceramic sintering method. Background technique [0002] Ceramic materials are widely used in various fields, for example, they can be used to manufacture solar cells, piezoelectric devices and so on. The formation of ceramic materials requires the ceramic powder to be transformed into a green body through molding technology, and then sintered to make the crystal grains of the green body migrate and grow, and the green body shrinks. Traditional sintering technologies generally require high temperatures above 1000°C, resulting in high energy consumption and cost. [0003] In recent years, many emerging ceramic sintering technologies have been born. Among them, "Flash Sintering" is a new sintering process that reduces the sintering temperature of ceramics and greatly shortens the time required for sint...

Claims

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Application Information

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IPC IPC(8): C04B35/64F27D19/00F27D11/10
CPCC04B35/64F27D11/10F27D19/00F27D2019/0037C04B2235/666
Inventor 王希林李想张若兵贾志东王黎明
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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