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Sound-absorbing ceramic material and preparation method thereof

A ceramic material and sound-absorbing technology, applied in the field of sound-absorbing ceramic materials and their preparation, can solve the problems of limited use environment, poor sound absorption effect, poor fire resistance, etc., and achieve strong protection ability, good moisture resistance and frost resistance, Good sound absorption system

Inactive Publication Date: 2019-04-26
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic porous sound-absorbing materials such as polyester fiber sound-absorbing panels and polyurethane foam sound-absorbing panels also have good sound absorption effects and can be used directly without facing, but their fire resistance is poor and the use environment is limited.
Therefore, porous inorganic sound-absorbing materials such as foam glass and foam ceramics have received more and more attention. However, the foam glass and foam ceramics produced by the conventional foaming method cannot form a suitable effective through-hole structure, so the sound absorption effect is not good.

Method used

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  • Sound-absorbing ceramic material and preparation method thereof
  • Sound-absorbing ceramic material and preparation method thereof

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preparation example Construction

[0045] Such as figure 1 and 2 Shown, a kind of preparation method of sound-absorbing ceramic material of the present invention comprises the following steps:

[0046] S1. After mixing alumina ceramics, silicon carbide, talc and silicate evenly, adding a solvent to obtain a ceramic slurry;

[0047] S2, the polyurethane organic foam is sequentially pretreated with sodium hydroxide solution and carboxymethyl cellulose solution to obtain pretreated polyurethane organic foam;

[0048] S3, immersing the pretreated polyurethane organic foam obtained in step S2 into the ceramic slurry obtained in step S1 to carry out a slurrying step, and drying to obtain a green body;

[0049] S4. Sintering the body obtained in step S3 to obtain a sound-absorbing ceramic material after the sintering is completed.

[0050] The present invention utilizes the polyurethane organic foam which has an open-pore three-dimensional network skeleton and is decomposable at high temperature as a porous carrier...

Embodiment 1

[0052] A preparation method of the sound-absorbing ceramic material of this embodiment, comprising the following steps:

[0053] (1) Mix 30 parts of high-content alumina ceramic powder with 15 parts of dispersant carboxymethyl cellulose and 5 parts of polyethylene oxide, and then mix with 25 parts of silicon carbide powder, 35 parts of talc powder and 15 parts of magnesium silicate powder Fully grind and mix by ball milling to obtain ceramic materials; add 40 parts of water to the ceramic materials and stir for 15 minutes with a constant temperature magnetic stirrer to obtain ceramic slurry. At this time, the ceramic slurry has good fluidity and stability, and water can promote mixing. Material, mixing and other processes are carried out smoothly.

[0054](2) Take 1 part of polyurethane organic foam for pretreatment, first soak it in 2 parts of NaOH solution with a concentration of 25% at 30°C for 18 hours, take it out, rinse it with clean water, dry it naturally in the air, a...

Embodiment 2

[0061] A preparation method of the sound-absorbing ceramic material of this embodiment, comprising the following steps:

[0062] (1) Mix 25 parts of high-content alumina ceramic powder, 10 parts of dispersant carboxymethyl cellulose, and 2 parts of polyethylene oxide, and then mix with 25 parts of silicon carbide powder, 25 parts of talc powder and 10 parts of potassium silicate powder Fully grind and mix by ball milling to obtain ceramic materials; add 30 parts of water to the ceramic materials, and stir with a constant temperature magnetic stirrer for 15 minutes to obtain ceramic slurry. At this time, the ceramic slurry has good fluidity and stability, and water can promote mixing. Material, mixing and other processes are carried out smoothly.

[0063] (2) Take 1 part of polyurethane organic foam for pretreatment, first soak it in 3 parts of 20% NaOH solution at 30°C for 12 hours, take it out, rinse it with clean water, dry it naturally in the air, and then put it in 4 parts...

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Abstract

The invention discloses a sound-absorbing ceramic material which is prepared from the following raw materials in parts by weight: 25-35 parts of aluminum oxide ceramics, 25-35 parts of silicon carbide, 25-35 parts of talcum, 10-15 parts of silicate, 1-2 parts of polyurethane organic foams and 30-40 parts of a solvent. The invention also provides a preparation method of the sound-absorbing ceramicmaterial. The preparation method comprises the following steps: uniformly mixing the aluminum oxide ceramics, the silicon carbide, the talcum and the silicate and adding the solvent into the mixture,so as to obtain ceramic slurry; pretreating the polyurethane organic foams with sodium hydroxide solution and carboxymethyl cellulose solution in sequence, soaking the pretreated polyurethane organicfoams into the ceramic slurry for slurry coating, and drying, so as to obtain a green body; sintering the green body, so as to obtain the sound-absorbing ceramic material after sintering is completed.The sound-absorbing ceramic material has the advantage of being good in sound absorption.

Description

technical field [0001] The invention relates to the technical field of sound-absorbing functional materials, in particular to a sound-absorbing ceramic material and a preparation method thereof. Background technique [0002] Generally, materials with an average sound absorption coefficient greater than 0.2 are called sound-absorbing materials. At present, inorganic fiber porous materials such as glass wool and rock wool are the most commonly used sound-absorbing materials. Their sound-absorbing effect is good, but they are irritating to the human body. And it has no strength by itself, so it needs to be used in combination with decorative materials such as metal perforated plates. Organic porous sound-absorbing materials such as polyester fiber sound-absorbing panels and polyurethane foam sound-absorbing panels also have good sound absorption effects and can be used directly without facings, but their fire resistance is poor and the use environment is limited. Therefore, po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B35/10C04B35/565C04B35/622C04B38/06
CPCC04B33/13C04B35/10C04B35/565C04B35/622C04B38/0615C04B2235/3427C04B2235/3445C04B2235/3826C04B2235/349C04B2235/3201C04B2235/3217C04B2235/6567C04B2235/6562
Inventor 胡胜彭继文卢铃吴晓文曹浩陈炜吕建红曾惠芳欧阳玲黄韬
Owner STATE GRID HUNAN ELECTRIC POWER
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