Room temperature ceramic sintering method and ceramic

A sintering method and ceramic technology, which is applied in the field of ceramics sintered by the room temperature ceramic sintering method, can solve problems such as blast furnace temperature, achieve the effects of reducing furnace temperature and energy consumption, the method is simple and easy, and energy consumption is reduced

Active Publication Date: 2020-07-03
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most ceramic flash firing still requires relatively high furnace temperature

Method used

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  • Room temperature ceramic sintering method and ceramic
  • Room temperature ceramic sintering method and ceramic
  • Room temperature ceramic sintering method and ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The first step is to put a zinc oxide ceramic green body in the shape of an I-shape into such figure 2 After standing in the beaker shown for about 20 hours, the water content of the obtained water-containing ceramic green body reached 4.32%. Wherein, the middle part of the I-shaped ceramic green body has a thickness of 1.7mm, a length of 21mm, and a width of 3.3mm.

[0060] In the second step, wires are wound on both ends of the water-containing ceramic green body, and the wires are connected to an AC power source, and the wires are fixed on a fixed support to suspend the water-containing ceramic green body.

[0061] 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 water-containing ceramic green body suddenly drops, and the current flowing through the water-containing ceramic green body suddenly rises, maintaining the voltage and current No change, the power supply was discon...

Embodiment 2

[0063] The difference from Example 1 is that the shape of the ceramic green body in the first step is a cylinder, wherein the diameter is 3 mm and the length is 22 mm, and it is placed in a beaker for about 36 hours, and the moisture content of the obtained hydrous ceramic green body reaches 6.12%. . A DC power supply is used in the second step.

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Abstract

The invention provides a room temperature ceramic sintering method. The room temperature ceramic sintering method comprises the following steps: providing an original ceramic green body; placing the original ceramic green body in a closed container containing water vapor to enable the original ceramic green body to absorb water to obtain a water containing ceramic green body; taking the water containing ceramic green body out of the closed container, connecting two ends of the water containing ceramic green body with a power supply; turning on the power supply to apply a voltage on the water containing ceramic green body; increasing the voltage to a preset voltage value to enable the water containing ceramic green body to generate creeping discharge or internal discharge, and cutting off the power supply after creeping discharge or internal discharge lasts for a preset period of time to obtain the ceramic. The room temperature ceramic sintering method can be used for sintering ceramicat a room temperature. The invention also provides a ceramic sintered by the room temperature ceramic sintering method.

Description

technical field [0001] The invention relates to the technical field of ceramic material preparation, in particular to a room temperature ceramic sintering method and ceramics sintered by using the room temperature ceramic sintering method. Background technique [0002] Human beings have used ceramic materials for thousands of years. From the earliest pottery to the multifunctional ceramic materials and devices, ceramic materials are now widely used in various high-tech industries. Due to their special physical and chemical properties, ceramic materials are generally not manufactured by machining or casting processes, but by powder molding and high-temperature sintering. One of the main disadvantages of sintering is the high energy consumption, since conventional sintering methods require high temperatures and long times. [0003] The flash firing process applies a certain intensity of electric field on the ceramic green body, so as to reduce the furnace temperature required...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/64C04B35/453C04B35/622
CPCC04B35/64C04B35/453C04B35/622C04B2235/606C04B2235/656C04B2235/666C04B2235/6588C04B2235/616C04B2235/786C04B2235/77C04B2235/3284C04B2235/95C04B2235/94
Inventor 王希林刘杰明刘光华贾志东张若兵王黎明
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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