Mullite fiber reinforced porous ceramic product and method for preparing mullite fiber reinforced porous ceramic product from waste ceramics

A technology of mullite fiber and porous ceramics, which is applied in the field of ceramic products, can solve the problems of low toughness of porous ceramic materials, limit the application range of materials, and high brittleness, achieve low density, realize comprehensive utilization of resources, improve mechanical properties and The effect of durability

Inactive Publication Date: 2013-01-02
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, porous ceramic materials generally have the disadvantages of low toughness, high brittleness, and easy cracking, which limits the application range of such materials.

Method used

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  • Mullite fiber reinforced porous ceramic product and method for preparing mullite fiber reinforced porous ceramic product from waste ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Select the waste ceramic fragments (glazed) 16% (glazed), (unglazed) 34%, tremolite 17%, dolomite 6%, pottery clay 23%, add 0.4 % Silicon carbide powder, crush and mix, ball mill for 20 hours, add 0.5% mullite fiber and continue to stir for 8 minutes, after drying and granulation, after aging, pour the mud into a detachable and split-type refractory combined mold, and fire at 1220℃ , The bulk density of the cold-worked ceramic material product is 0.6g / cm3, the flexural strength is 7MPa, and it is frozen and thawed in water at -20℃~20℃ for 3 hours, 5 cycles, without damage, which proves its excellent frost resistance.

Embodiment 2

[0024] Select the waste ceramic fragments (glazed) 16% (glazed), (unglazed) 34%, tremolite 17%, dolomite 6%, pottery clay 23%, add 0.4 % Silicon carbide powder, crush and mix, ball mill for 20 hours, add 5% mullite fiber and continue to stir for 8 minutes, after drying and granulation, after aging, pave the mud into a detachable and split type refractory composite mold, and fire at 1220℃ , The bulk density of the cold-worked ceramic material product is 0.6g / cm3, the flexural strength is 11.5MPa, and it is frozen and thawed in water at -20℃~20℃ for 6 hours, 10 cycles, without damage, which proves its excellent frost resistance.

Embodiment 3

[0026] Select the waste ceramic fragments (glazed) 18% (glazed), (unglazed) 40%, tremolite 16%, dolomite 6%, pottery clay 20%, add 1.4 % Silicon carbide powder, crush and mix, ball mill for 20 hours, add 0.5% mullite fiber and continue to stir for 8 minutes, after drying and granulation, after aging, pour the mud into a detachable and split-type refractory combined mold, and fire at 1220℃ , The bulk density of the cold-worked ceramic material product is 0.65g / cm3, the flexural strength is 7.8MPa, and it is frozen and thawed in water at -20℃~20℃ for 6 hours, 10 cycles, without damage, which proves its excellent frost resistance.

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Abstract

The invention discloses a mullite fiber reinforced porous ceramic product. The mullite fiber reinforced porous ceramic product comprises the following components in percentage by weight: 50 to 58 percent of waste ceramic fragment, 40 to 48 percent of foaming mineral, 0.1 to 2 percent of sintering modifier and 0.1 to 5 percent of mullite fiber. A method for preparing the mullite fiber reinforced porous ceramic product comprises the following steps of: pulverizing and mixing the waste ceramic fragment, the foaming mineral and the sintering modifier to perform ball milling; adding the mullite fiber into the mixture and continuing to stir the mixture; performing spray drying; after the mixture is staled, paving pug into a detachable fire-resistant combined mould; slicking the mould and placing the mould into a kiln; and firing to obtain the light-weight uniform and sealed micropore-containing mullite fiber reinforced ceramic product. The mullite fiber reinforced porous ceramic product andthe preparation method thereof have the advantages of improving the mechanic property and the durability of the porous ceramic material, solving the problem of environmental pollution of waste ceramics and realizing recycling comprehensive utilization, along with great economic and social benefits and the like.

Description

Technical field [0001] The invention relates to a ceramic product, in particular to a mullite fiber reinforced porous ceramic product and a method for preparing the product by using waste ceramics. Background technique [0002] The patent No. CN200410026753.6 discloses a method for preparing lightweight ceramic plates. The mineral raw materials are added with bentonite powder with a loss on ignition of 10%-15% to form pores inside the bricks and the density is 0.7~ 0.9g / cm3 lightweight material. However, porous ceramic materials generally have the disadvantages of low toughness, high brittleness, and easy cracking, which limit the application range of such materials. Approximately 5%-10% of waste ceramics are produced during the production of ceramic products. Only in Yixing, my country, there are more than 30,000 tons of waste ceramics awaiting treatment every year. Summary of the invention [0003] The purpose of the present invention is to provide a mullite fiber reinforced p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C04B38/02C04B35/80C04B35/622C04B35/64
Inventor 赖建中崔崇陈光张士华彭东文石晓琴
Owner NANJING UNIV OF SCI & TECH
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