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Ultra-microporous ceramic sound-absorbing material and preparation method thereof

A technology of sound-absorbing materials and microporous materials, applied in ceramic products, other household appliances, household appliances, etc., can solve the problem of strength attenuation, difficulty in drilling and other mechanical processing, and comprehensive performance cannot satisfy both sound absorption performance and strength and other problems, to achieve the effect of increasing strength and processing performance, excellent acoustic absorption performance, and high strength

Active Publication Date: 2015-04-15
CHENGDU ZHONGHONG RAIL TRANSIT ENVIRONMENTAL PROTECTION IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, when the existing ceramic sound-absorbing materials meet relatively high sound-absorbing performance, due to the porosity requirements, the strength has a large attenuation, and it is difficult to perform drilling and other mechanical processing, and its comprehensive performance cannot meet the high-speed railway sound barrier at the same time. Various requirements for sound absorption performance and strength

Method used

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  • Ultra-microporous ceramic sound-absorbing material and preparation method thereof
  • Ultra-microporous ceramic sound-absorbing material and preparation method thereof
  • Ultra-microporous ceramic sound-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Prepare according to the following material parts by mass:

[0039] 8.93 parts of water, 22.32 parts of PVA (10%) aqueous solution, 26.79 parts of composite sol, 13.39 parts of alumina fiber (diameter 3 ) 20.09 parts, sodium tripolyphosphate 0.50 parts.

[0040] Glaze layer components: 2.50 parts of cerium oxide, 6.50 parts of lanthanum oxide, 12.0 parts of glass powder, 4.50 parts of calcium carbonate, 29.70 parts of silicon dioxide, 15.60 parts of aluminum oxide, 22.40 parts of boric acid, and 6.80 parts of titanium dioxide.

[0041]Process: 1. Slurry preparation: firstly adjust PVA into 10% aqueous solution, then mix it with water, surfactant and alumina fiber, and disperse at high speed (1500 rpm) for 20-60 minutes to obtain fibers containing a lot of foam Then add composite sol and stir at high speed for about 10 minutes to make it evenly mixed, then add fumed silica and zirconia, stir at high speed for 10-30 minutes, and finally add expanded perlite and mix for 5-...

Embodiment 2

[0047] Prepare according to the following material parts by mass:

[0048] 21.05 parts of PVA (10%) aqueous solution, 31.58 parts of composite sol, 19.39 parts of mullite fiber, 7.66 parts of cerium oxide, and 20.32 parts of molecular sieve.

[0049] Glaze layer components: 2.50 parts of cerium oxide, 6.50 parts of lanthanum oxide, 12.0 parts of glass powder, 4.50 parts of calcium carbonate, 29.70 parts of silicon dioxide, 15.60 parts of aluminum oxide, 22.40 parts of boric acid, and 6.80 parts of titanium dioxide.

[0050] Process: 1. Slurry preparation: firstly adjust PVA into a 10% aqueous solution, then mix it with mullite fiber, disperse at high speed (1500 rpm) for 20-60 minutes, obtain a fiber slurry containing a large amount of foam, add composite sol Stir at high speed for about 10 minutes to make it evenly mixed, then add cerium oxide and molecular sieve, stir at high speed for 10-30 minutes to form a uniform slurry. 2. Injection molding: inject the slurry into the ...

Embodiment 3

[0055] Prepare according to the following material parts by mass:

[0056] 11.46 parts of water, 18.35 parts of PVA (10%) aqueous solution, 28.78 parts of composite sol, 12.25 parts of quartz fiber, 2.32 parts of cerium oxide, 3.30 parts of yttrium oxide, 4.82 parts of fumed silica (R972), expanded perlite (particle size 0.6 -1.3mm, density 80-90kg / m 3 ) 12.32 parts, polylight ball (diameter 0.5-2mm, density 0.03-0.07) 0.60 parts, sawdust 5.80 parts, sodium tripolyphosphate 0.30 parts.

[0057] Glaze layer components: 2.50 parts of cerium oxide, 6.50 parts of lanthanum oxide, 12.0 parts of glass powder, 4.50 parts of calcium carbonate, 29.70 parts of silicon dioxide, 15.60 parts of aluminum oxide, 22.40 parts of boric acid, and 6.80 parts of titanium dioxide.

[0058] Process: 1. Slurry preparation: first make PVA into 10% aqueous solution, then mix it with water, surfactant and quartz fiber, disperse at high speed (1500 rpm) for 20-60 minutes, and obtain fiber slurry contain...

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Abstract

The invention discloses an ultra-microporous ceramic sound-absorbing material and a preparation method thereof. The ultra-microporous ceramic sound-absorbing material comprises water, polyvinyl acetate (PVA), composite sol, inorganic fiber, rare earth oxide or zirconium oxide, a microporous material, a pore-forming material and a surfactant, and ceramic glaze which is soaked in a matrix prepared from the above materials. The preparation method comprises the preparation steps of preparing slurry, performing injection molding, sintering, glazing the matrix, sintering and the like. The ultra-microporous ceramic sound-absorbing material disclosed by the invention has excellent sound-absorbing performance; zirconium oxide or / and rare earth oxide is added into the material, so that the whole material has high strength while maintaining excellent sound-absorbing performance; according to detection, the ultra-microporous ceramic sound-absorbing material disclosed by the invention has higher sound-absorbing coefficient compared with the conventional sound-absorbing material, and wide distributed frequency band, in particular, has high sound-absorbing coefficient in low-frequency band, so the material is particularly suitable for serving as the sound-absorbing material of a sound barrier of a high-speed rail.

Description

technical field [0001] The invention belongs to the technical field of preparation of ceramic materials, in particular to the technical field of preparation of ultramicroporous ceramic materials, in particular to an ultramicroporous ceramic material applied to high-speed railway sound-absorbing materials and a preparation method thereof. Background technique [0002] The sound barrier is a facility inserted between the sound source and the receiver, which can make the sound source transmission have a significant additional attenuation, thereby reducing the noise impact in a certain area where the receiver is located. The sound-absorbing material used in the sound barrier of high-speed railway is firstly that its sound-absorbing performance should meet the structural design requirements of the sound barrier, and its noise reduction coefficient NRC>0.5. At the same time, the sound-absorbing material used outdoors should also have good mechanical properties and weather resist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/06C04B41/86
Inventor 陈松
Owner CHENGDU ZHONGHONG RAIL TRANSIT ENVIRONMENTAL PROTECTION IND
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