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Hybrid fiber reinforced light ceramic material and preparation method thereof

A technology of hybrid fiber and lightweight ceramics, applied in the field of ceramic materials, can solve the problems of increased material cost, easy cracking, high brittleness, etc., and achieve the effects of improving mechanical properties and durability, wide sources, and low density

Inactive Publication Date: 2011-05-04
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.
The toughness of the material can be improved through the method of single fiber reinforcement, but the degree of improvement is limited, and the cost of the material is increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Select 54% of waste ceramic fragments with 19% alumina content and 62% silica content, 12% dolomite, 6% limestone, and 28% pottery clay, add 0.5% silica powder, crush and mix, ball mill for 24 hours, add 0.5% After mixing the mixed fibers, continue to stir for 5 minutes, press filter, dry, granulate, centrifuge and rotate into balls, and after drying, burn at 1170°C to make ceramic material products with a bulk density of 0.5g / cm3. The flexural strength is 10MPa, and there is no damage after freezing and thawing in water at -20°C to 20°C for 9 hours and 15 cycles, which proves that it has excellent frost resistance. The hybrid fibers are alumina fibers and basalt fibers in a mixing ratio of 1:1.

Embodiment 2

[0023] Select 20% of waste slag with 14% alumina content and 71% silica content, 20% sludge, 10% fly ash, 20% dolomite, 4% limestone, 26% pottery clay, crush and mix, ball mill for 20 hours, add 2 % mixed fiber and then continue to stir for 8 minutes, dry granulation, dry press molding, firing at 1160 ° C, and then cold processing to make 800 * 800 * 30mm flat ceramic material products. The bulk density of the product is 0.6g / cm3, and the flexural strength is 9MPa. It has been frozen and thawed in water at -20°C to 20°C for 9 hours, 15 cycles, and there is no damage, which proves that it has excellent frost resistance. The hybrid fibers are mullite fibers and basalt fibers in a mixing ratio of 1:1.

Embodiment 3

[0025] Select waste ceramic fragments (glazed) with 22% alumina content and 68% silica content (glazed) 18%, (unglazed) 36%, limestone 17%, dolomite 6%, pottery clay 23%, add 0.5% di Silica micropowder, crushed and mixed, ball milled for 20 hours, added 5% mixed fibers and continued to stir for 10 minutes, dried and granulated, and then fired at 1220°C after dry pressing. The bulk density of the ceramic material product after cold processing is 0.6g / cm3, The flexural strength is 13MPa. Freeze-thaw in -20℃~20℃ water for 6 hours and 10 cycles without damage, which proves that it has excellent frost resistance. The hybrid fibers are mullite fibers and alumina fibers in a mixing ratio of 1:1.

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Abstract

The invention discloses a hybrid fiber reinforced light ceramic material, which comprises the following components in percentage by weight: 50 to 75 percent of solid waste, 20 to 49 percent of pore-forming agent, 0.1 to 2 percent of curing modifier and 0.1 to 5 percent of hybrid fiber. A method for preparing the material comprises the following steps of: crushing and mixing the solid waste, the pore-forming agent and the curing modifier, and performing wet milling; adding two kinds of high temperature resistant fibers in a mixing ratio of (0.2-1):(0.2-1) into the mixture, and continuously stirring; and performing drying granulation, dry press molding, firing, cold working to obtain the light fiber reinforced ceramic material product containing uniformly enclosed micropores. The raw materials are wide in sources, a large amount of solid waste is used, and the hybrid fiber reinforced light ceramic material has the characteristics of low cost, low density, high temperature resistance, corrosion resistance, high cracking resistance, impact resistance, eco-friendliness and the like.

Description

technical field [0001] The invention relates to a ceramic material, in particular to a hybrid fiber reinforced lightweight ceramic material and a preparation method thereof. Background technique [0002] Patent No. CN200410026753.6 discloses a method for preparing light-weight ceramic plates, adding puffed stone powder with an ignition loss of 10% to 15% to the mineral raw materials to form pores inside the adobe, and the density is 0.7-15%. 0.9g / cm3 porous ceramic 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. The toughness of the material can be improved by the method of single fiber reinforcement, but the degree of improvement is limited, and the cost of the material is increased. How to prepare low-cost, high-performance lightweight porous ceramic materials is a current technical difficulty. Contents of the invention [0003] The ...

Claims

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Application Information

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