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Process for drying biscuit of ceramic, metallic ceramic material

A cermet and china technology, which is applied to clay products, other household appliances, household utensils and other directions, can solve problems such as deformation of china, and achieve the effects of low cost, low cost and reasonable process design.

Inactive Publication Date: 2006-06-28
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When shrinkage is uneven, resulting in deformation of the biscuit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Mix the NiO / YSZ powder according to the mass ratio of 6.5:3.5, knead the mud after kneading, roll 200*200mm, the thickness is 1.2mm, and the water content is 20-25%. Then place the green body at a temperature of 25°C, a relative humidity of 90%, and a pressure of 1 atmosphere in a drying oven for 150 minutes; microwave the dried green body with a heating power of 100 watts. The time is 20 seconds; put the above-mentioned microwave-heated bisque into a drying oven with a temperature of 25°C, a relative humidity of 90%, and a pressure of 1 atmosphere, and let it stand for 150 minutes before microwave heating. This cycle repeats for about Ten times, until the green body in a semi-dry state with a water content of 5-20% in the green body; the above-mentioned half-opened green body is then microwave-heated with a power of 100 watts for 20 seconds; then, the The above-mentioned green body heated by microwave is put into a drying oven for drying at a temperature of 25°C, a rel...

Embodiment 2

[0019] Mix the NiO / YSZ powder according to the mass ratio of 6.5:3.5, knead the mud after kneading, roll 200*200mm, the thickness is 1.2mm, and the water content is 20-25%. Then place the green body at a temperature of 10°C, a relative humidity of 70%, and a pressure of 0.1 atmospheric pressure in a drying oven for 100 minutes; microwave the dried green body with a heating power of 10 watts. The time is 10 seconds; put the above-mentioned microwave-heated bisque into a drying oven with a temperature of 10°C, a relative humidity of 70%, and a pressure of 0.1 atmosphere, and let it stand for 100 minutes before microwave heating. This cycle repeats for about Ten times, until the green body in a semi-dry state with a water content of 5-20% in the green body; the above-mentioned half-opened green body is then microwave-heated with a power of 10 watts and a time of 10 seconds; then, the The above-mentioned green body heated by microwave is put into a drying oven for drying at a temp...

Embodiment 3

[0021] Mix the NiO / YSZ powder according to the mass ratio of 6.5:3.5, knead the mud in vacuum, roll the 200*200mm thickness of 1.2mm, and put the biscuit with a moisture content of 20-25% in humid air and let it dry Then place the green body at a temperature of 40°C, with a relative air humidity of 95%, and a pressure of 2 atmospheres to dry for 300 minutes; microwave the dried green body with a heating power of 400 watts. The time is 100 seconds; put the above microwave-heated bisque into a drying oven with a temperature of 40°C, a relative humidity of 95%, and a pressure of 2 atmospheres, and let it stand for 300 minutes before microwave heating. This cycle repeats for about Ten times, until the green body in a semi-dry state with a water content of 5 to 20% in the green body; the above-mentioned half-opened green body is then microwave-heated with a power of 400 watts and a time of 100 seconds; then, the The above-mentioned green body heated by microwave is put into a dryin...

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Abstract

The invention relates to a ceramics or metal ceramics material biscuit drying method the feature is that repeats the process of drying by wet airí¬microwave heatingí¬drying by wet air for ten times under certain temperature and relative humidity until the semi-drying biscuit containing 5-20% water forming; repeating the process of wet airí¬microwave heatingí¬drying by wet air for thirty times under certain temperature and relative humidity until the semi-drying biscuit containing 5% water. The invention realizes the equally decreasing the water distributing in biscuit. It is easy to operate and low cost.

Description

technical field [0001] The invention relates to a drying method of a green body, in particular to a drying method of a ceramic and cermet green body suitable as a flat anode of a solid oxide fuel cell. technical background [0002] The preparation of flat ceramic thin plates, especially with a series of functional properties, has extremely important application value in high-tech fields. For example, nickel oxide and yttrium oxide doped zirconia (YSZ) materials are used as intermediate temperature solid oxide fuel cells ( The preparation of the SOFC anode is one of the core preparation technologies of the SOFC stack, and its thickness directly affects the power output of the battery. In the preparation of a single cell of a medium-temperature solid oxide fuel cell, the thickness of the anode support is generally 0.5-1.2mm. Reducing the thickness of the anode and increasing its porosity can effectively improve the performance of the battery, but the reduction in thickness , ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/30
Inventor 鲍巍涛范广能丁明胡坤宏
Owner HEFEI UNIV
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