High-porosity porous ceramic and preparation method thereof

A technology of porous ceramics and high porosity, which is applied to ceramic products, other household utensils, household utensils, etc., and can solve the problems of separate preparation process and complexity, and achieve the effect of increasing pore content, simplifying manufacturing process, and easy operation
CN102584329AInactive Publication Date: 2012-07-18ANHUI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANHUI UNIV OF SCI & TECH
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides high-porosity porous ceramic and a preparation method thereof, relates to porous ceramic and a preparation method thereof, and aims to solve the problems that when the high-porosity porous ceramic is prepared by adopting the prior direct foaming technology, a slurry foaming process is separated from a foam solidification process, and the preparation process is complex. The high-porosity porous ceramic is provided with even spherical honeycomb pore structure units, wherein the pore walls are mutually communicated via porous windows; and the porosity can reach above 90 percent. The preparation method comprises the steps that: I, raw materials are weighed and ball-milled to obtain slurry; II, the slurry is placed in a vacuum chamber to be degassed; III, a supercooling point of the slurry is tested; IV, the slurry is cooled to obtain supercooling slurry; V, the supercooling slurry is decompressed, foamed and solidified with foam; VI, the solidified and foamed material is dried to obtain ceramic bisque; and VII, the ceramic bisque is sintered to obtain the high-porosity porous ceramic. The preparation method has the advantages that the slurry foaming process is organically combined with the foam solidification process, the technology is simple and the porosity of the prepared ceramic reaches above 90 percent. The preparation method is used for preparing the high-porosity porous ceramic.
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Description

technical field

[0001] The present invention relates to porous ceramics and its preparation method. Background technique

[0002] Porous ceramics have the advantages of low density, large specific surface area, and low thermal conductivity, and are widely used in many fields such as the treatment of automobile exhaust and industrial wastewater, molten metal filtration, catalyst carriers, heat insulation materials, sound insulation materials, and biological materials. The preparation methods of porous ceramics are mainly divided into replica technology, sacrificial template method and direct foaming technology. Different processing methods determine the different microstructures and properties of porous ceramics. Therefore, which preparation route to use strongly depends on the structure of the final product, the cost and operability of the process.

[0003] Compared with replica technology and sacrificial template method, direct foaming technology avoids the process of tem...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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