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Ceramic sintering method and ceramic

A sintering method and ceramic technology, applied in the field of ceramic material preparation, can solve the problems of complicated devices and steps, and achieve the effect of simple process and operation

Pending Publication Date: 2021-08-27
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the devices and steps required to achieve flash combustion are relatively complicated

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Step 1: Use a syringe to manually add 50 μL of water to a zinc oxide ceramic green body in the shape of a dog bone. Among them, the thickness of the middle part of the dog-bone shaped ceramic green body is 1.7mm, the length is 21mm, and the width is 3.3mm.

[0052] In the second step, wires are wound on both ends of the zinc ceramic green body, and the wires are connected to an AC power source, and the wires are fixed on a fixing bracket to suspend the ceramic green body.

[0053] The third step is to turn on the power supply, and then rapidly increase the voltage at a rate of 1kV / s until the voltage at both ends of the ceramic green body suddenly drops and the passing current rises suddenly, keep the voltage and current unchanged, and disconnect after 1 minute power supply, complete sintering.

Embodiment 2

[0055] The difference from Example 1 is that in the first step, 100 μL of sodium chloride solution with a mass fraction of 20% is added dropwise at a flow rate of 5 μL / s using an automatic sampling device; the shape of the ceramic green body is a cylinder, and the diameter is 3mm and a length of 22mm. In the second step, connect to the DC power supply.

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Abstract

The invention provides a ceramic sintering method which comprises the following steps: providing a ceramic green body, and dropwise adding liquid drops on the surface of the ceramic green body; connecting two ends of the ceramic green body dropwise added with the liquid drops with a power supply; connecting the power supply to apply voltage to the ceramic green body; and increasing the voltage to a preset voltage value, enabling the ceramic green body to generate creeping discharge or internal discharge, enabling the current flowing through the ceramic green body to reach a preset current value, maintaining for a preset time period, and then cutting off the power supply, thereby obtaining the ceramic. According to the sintering method of the ceramic provided by the invention, flash sintering can be carried out at room temperature, and rapid densification can be realized. The invention also provides the ceramic sintered by using the sintering method of the ceramic.

Description

technical field [0001] The invention relates to the technical field of ceramic material preparation, in particular to a ceramic sintering method and ceramics sintered by using the ceramic sintering method. Background technique [0002] Ceramic materials have important applications in various industries such as daily life and industrial manufacturing. At present, the manufacture of ceramic materials requires long-term high temperature to sinter the originally relatively loose green body to fully dense. This also means that the traditional ceramic manufacturing process requires a lot of energy and a long time. [0003] Flash firing technology can reduce energy consumption in the ceramic sintering process. It is a new type of electric field-assisted sintering process, that is, by applying a suitable electric field at both ends of the ceramic green body, the ceramics can be heated at a lower furnace temperature by using mechanisms such as thermal runaway. rapid densification. ...

Claims

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Application Information

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IPC IPC(8): C04B35/64
CPCC04B35/64
Inventor 王希林刘杰明刘光华贾志东王黎明
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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