KR20110120088A - Ecofriendly sound-absorbing ceramic board and method for manufacturing the same - Google Patents
Ecofriendly sound-absorbing ceramic board and method for manufacturing the same Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 22
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- 239000011449 brick Substances 0.000 claims abstract description 156
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- 239000011358 absorbing material Substances 0.000 claims abstract description 103
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1324—Recycled material, e.g. tile dust, stone waste, spent refractory material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
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- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
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- C04B33/30—Drying methods
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
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- C04B38/0675—Vegetable refuse; Cellulosic materials, e.g. wood chips, cork, peat, paper
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
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Abstract
Description
본 발명은 세라믹 흡음재 및 그 제조방법에 관한 것으로, 더욱 상세하게는 점토 벽돌 생산시 부산물로 발생하여 매립 폐기되어지는 무해한 폐점토벽돌을 이용하고, 저주파 영역의 흡음특성이 우수하며, 친환경적이고, 강도가 뛰어나며, 유기 휘발물질을 발생시키지 않으면서 불연성인 세라믹 흡음재 및 그 제조방법에 관한 것이다.
The present invention relates to a ceramic sound absorbing material and a method of manufacturing the same, and more particularly, to use a harmless waste clay brick which is generated as a by-product when clay brick is produced and disposed of, and has excellent sound absorption characteristics in a low frequency region, and is environmentally friendly and strong. The invention relates to a ceramic sound absorbing material which is excellent in nonflammability and does not generate organic volatiles, and a method of manufacturing the same.
현재 이용되고 있는 대부분의 세라믹 흡음재는 다공질의 소재로써, 사용하는 입자의 크기에 따라 그 흡음 성능이 구분되어지나 비교적 2000Hz 이상의 고주파 영역에서는 흡음 특성이 양호하지만, 1000Hz 미만의 저주파 영역에서는 흡음 특성이 아주 낮게 나타난다. 이것은 일반적으로 공명형 다공판의 흡음 특성과 유사하게 나타난다.Most of the ceramic sound absorbers currently used are porous materials, and their sound absorption performance is classified according to the size of the particles used. However, the sound absorption characteristics are good in the high frequency region of 2000Hz or higher, but the sound absorption characteristics are very low in the low frequency region of less than 1000Hz. Appears low. This generally appears similar to the sound absorption properties of resonant porous plates.
현재 사용되고 있는 대부분의 세라믹 흡음재는 항공소음, 기계소음 등의 고주파를 발산하는 소음 영역에서는 사용 가능하지만 인간생활과 밀접한 관련이 있는 실내용으로 적용하기에는 그 용도가 부적합하다.Most of the ceramic sound absorbing materials currently used can be used in the noise area such as aviation noise and mechanical noise, but they are not suitable for indoor use which is closely related to human life.
대한민국 공개특허 특2001-0070597호 '경질의 다공성 세라믹 흡음재 및 그 제조방법'은 백토, 황토 등 세라믹 소재를 활용하지만 폴리우레탄을 이용하여 발포 효과를 내어 소재 내 기공을 형성시키는 것으로, 이는 폴리우레탄이 소성과정에서 타서 없어지면서 여러가지 환경 오염 물질을 배출하게 되어 최종 제품은 친환경 소재일지 모르지만 그 과정에서 다량의 유해물질이 배출되어 공기를 오염시키게 되며, 제조 과정이 13단계로서 매우 복잡하여 생산성이 떨어지는 문제점이 있다. Republic of Korea Patent Publication No. 2001-0070597 'hard porous ceramic sound-absorbing material and its manufacturing method' uses a ceramic material, such as clay, ocher, but using a polyurethane to form a pore in the material by producing a foaming effect, which is a polyurethane The final product may be an environmentally friendly material as it is burned out and disappeared during the firing process, but in the process, a large amount of harmful substances are discharged to contaminate the air. There is this.
대한민국 공개특허 제10-2004-0076402호 '흡음재료용 다공질 세라믹 및 그 제조방법'은 하수슬러지 소각 슬래그 90∼95중량%, 점토 5∼10중량%를 혼합하여 물유리를 외삽으로 5∼10중량% 첨가하여 제조한 다공질 세라믹을 제공한다. 여기서는 1100℃에서 용융되므로 소성 온도 범위가 매우 좁아 생산성이 떨어지는 문제가 있으며, 이로 인해 소재의 균질성이 떨어져 흡음 특성 변화에 영향을 주는 문제가 있다. Republic of Korea Patent Publication No. 10-2004-0076402 'porous ceramic for sound-absorbing material and its manufacturing method' is 90 to 95% by weight of sewage sludge incineration slag, 5 to 10% by weight of clay to extrapolate the water glass 5 to 10% by weight Provided is a porous ceramic prepared by addition. In this case, since melting at 1100 ° C., the firing temperature range is very narrow, which leads to a problem in that productivity is lowered, and thus, homogeneity of the material is reduced, thereby affecting sound absorption characteristics.
한편, 점토벽돌 및 타일 등을 생산하는 공정에서 폐기물로 발생하여 매립되어지는 폐벽돌, 폐타일이 연간 10만톤 이상으로 추정되는 바, 이를 재활용하여 사용함으로써 천연자원을 대체하여 자원 고갈을 방지하고, 매립에 사용되는 비용을 절감할 필요가 있다. Meanwhile, in the process of producing clay bricks and tiles, waste bricks and waste tiles, which are generated as landfills and landfills, are estimated to be more than 100,000 tons per year, and by recycling them, natural resources are replaced to prevent resource depletion. There is a need to reduce the costs used for landfilling.
이에 본 발명의 연구자들은 폐기물로 매립되는 폐벽돌을 이용하여 실내 환경에 적합한 친환경적인 세라믹 흡음재를 개발하였다.
Accordingly, the researchers of the present invention have developed an eco-friendly ceramic sound absorbing material suitable for indoor environment using the waste brick embedded in the waste.
본 발명이 해결하려는 과제는 점토 벽돌 생산시 부산물로 발생하여 매립 폐기되어지는 무해한 폐점토벽돌을 이용하고, 저주파 영역의 흡음특성이 우수하며, 친환경적이고, 강도가 뛰어나며, 유기 휘발물질을 발생시키지 않으면서 불연성인 세라믹 흡음재 및 그 제조방법을 제공함에 있다.
The problem to be solved by the present invention is to use a harmless waste clay brick that is generated as a by-product in the production of clay bricks and disposed of landfill, excellent sound absorption characteristics in the low-frequency region, environmentally friendly, excellent strength, do not generate organic volatiles To provide a non-combustible ceramic sound absorbing material and a method of manufacturing the same.
본 발명은, 세라믹 흡음재의 골격을 이루는 폐점토벽돌, 상기 폐점토벽돌 사이의 공간을 연결하는 점토 및 상기 폐점토벽돌과 상기 점토를 서로 연결하여 강도를 유지시켜 주는 프릿을 포함하며, 상기 점토는 상기 폐점토벽돌 100중량부에 대하여 5∼15중량부 함유되고, 상기 프릿은 상기 폐점토벽돌 100중량부에 대하여 5∼15중량부를 함유되는 친환경적인 세라믹 흡음재를 제공한다.The present invention includes a waste clay brick constituting the skeleton of the ceramic sound absorbing material, clay connecting the space between the waste clay brick and a frit connecting the waste clay brick and the clay to each other to maintain strength, the clay is 5 to 15 parts by weight based on 100 parts by weight of the closed clay brick, and the frit provides an environmentally friendly ceramic sound absorbing material containing 5 to 15 parts by weight based on 100 parts by weight of the waste clay brick.
상기 폐점토벽돌은 0.3∼5mm의 입자 크기를 갖는 것이 바람직하다. The closed clay brick preferably has a particle size of 0.3 to 5mm.
상기 세라믹 흡음재는 10∼100mm의 두께를 갖고, 벽체로부터 10∼50mm의 간격이 이격되게 설치되어 상기 세라믹 흡음재와 상기 벽체 사이에 공기층이 형성되게 구비될 수 있다. The ceramic sound absorbing material may have a thickness of 10 to 100 mm, and is spaced apart from the wall by 10 to 50 mm so that an air layer is formed between the ceramic sound absorbing material and the wall.
상기 세라믹 흡음재는, 소성 온도를 저감시키기 위한 플라이애쉬를 더 포함할 수 있으며, 상기 플라이애쉬는 상기 폐점토벽돌 100중량부에 대하여 0.1∼5중량부 함유되는 것이 바람직하다.The ceramic sound absorbing material may further include a fly ash for reducing the firing temperature, the fly ash is preferably contained 0.1 to 5 parts by weight based on 100 parts by weight of the waste clay brick.
상기 세라믹 흡음재는, 경량화시키고 흡음 성능을 향상시키기 위하여 바텀애쉬를 더 포함할 수 있으며, 상기 바텀애쉬는 상기 폐점토벽돌 100중량부에 대하여 0.1∼20중량부 함유되는 것이 바람직하다.The ceramic sound absorbing material may further include a bottom ash in order to reduce weight and improve sound absorption performance, and the bottom ash is preferably contained in an amount of 0.1 to 20 parts by weight based on 100 parts by weight of the closed clay brick.
상기 세라믹 흡음재는, 기공을 형성하여 기공율 및 흡음 성능을 향상시키기 위하여 흑연을 더 포함할 수 있으며, 상기 흑연은 상기 폐점토벽돌 100중량부에 대하여 0.1∼5중량부 함유되는 것이 바람직하다.The ceramic sound absorbing material may further include graphite in order to form pores to improve porosity and sound absorption performance, and the graphite is preferably contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the waste clay brick.
상기 세라믹 흡음재는, 원적외선 방사율을 향상시키기 위하여 질석을 더 포함하며, 상기 질석은 상기 폐점토벽돌 100중량부에 대하여 0.1∼5중량부 함유되는 것이 바람직하다.The ceramic sound absorbing material further includes vermiculite in order to improve far-infrared emissivity, and the vermiculite is preferably contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the waste clay brick.
또한, 본 발명은, 폐점토벽돌을 분쇄하여 폐점토벽돌 분말을 일정 크기로 체가름하여 균일한 입도의 폐점토벽돌 분말을 준비하는 단계와, 상기 폐점토벽돌 분말 100중량부에 대하여 점토 5∼20중량부, 프릿 5∼20중량부 및 카르복시메틸셀룰로오스 1∼8중량부를 건식 혼합하는 단계와, 세라믹 흡음재 100중량부에 대하여 상기 폐점토벽돌 분말과 상기 폐점토벽돌 분말 100중량부에 대하여 수분 10∼20중량부를 믹서기에 첨가하고, 건식 혼합된 원료를 혼합하여 건식 혼합된 원료가 폐점토벽돌 분말의 표면에 코팅되게 하는 단계와, 믹서기에서 혼합된 결과물을 압축프레스를 이용하여 성형하는 단계와, 성형물을 60∼100℃의 온도에서 1∼24시간 동안 건조하는 단계 및 건조물을 900∼1200℃의 온도에서 30분∼12시간 동안 소성하여 세라믹 흡음재를 얻는 단계를 포함하는 친환경적인 세라믹 흡음재의 제조방법을 제공한다. In addition, the present invention, by pulverizing the waste clay brick sifted waste clay powder to a predetermined size to prepare a waste clay brick powder of a uniform particle size, the clay 5 to 100 parts by weight of the clay clay powder Dry mixing of 20 parts by weight, 5 to 20 parts by weight of frit and 1 to 8 parts by weight of carboxymethyl cellulose, and 10 parts by weight of the clay clay powder and 100 parts by weight of the clay clay powder with respect to 100 parts by weight of the ceramic sound absorbing material Adding -20 parts by weight to a blender, mixing the dry mixed raw material to coat the dry mixed raw material on the surface of the waste clay brick powder, and molding the resultant mixed in the blender using a compression press, Drying the molded product at a temperature of 60 to 100 ° C. for 1 to 24 hours, and baking the dried product at a temperature of 900 to 1200 ° C. for 30 minutes to 12 hours to obtain a ceramic sound absorbing material. Hahm provides an environmentally friendly method for producing a ceramic sound absorbing material.
상기 폐점토벽돌 분말이 0.3∼5mm의 입자 크기를 갖도록 상기 폐점토벽돌을 분쇄하는 것이 바람직하다. It is preferable to grind the waste clay brick so that the waste clay brick has a particle size of 0.3 to 5 mm.
소성된 세라믹 흡음재가 10∼100mm의 두께를 갖도록 성형하고, 상기 세라믹 흡음재와 벽체 사이에 공기층이 형성되게 상기 세라믹 흡음재를 벽체로부터 10∼50mm의 간격이 이격되게 형성할 수 있다. The fired ceramic sound absorbing material may be molded to have a thickness of 10 to 100 mm, and the ceramic sound absorbing material may be spaced apart from the wall by 10 to 50 mm so that an air layer is formed between the ceramic sound absorbing material and the wall.
상기 건식 혼합하는 단계에서, 소성 온도를 저감시키기 위하여 플라이애쉬를 상기 폐점토벽돌 분말 100중량부에 대하여 0.1∼5중량부 첨가하여 함께 혼합할 수 있다. In the dry mixing step, in order to reduce the firing temperature, fly ash may be added together with 0.1 to 5 parts by weight based on 100 parts by weight of the waste clay brick powder.
상기 건식 혼합하는 단계에서, 상기 세라믹 흡음재를 경량화시키고 흡음 성능을 향상시키기 위하여 바텀애쉬를 상기 폐점토벽돌 분말 100중량부에 대하여 0.1∼20중량부 첨가하여 함께 혼합할 수 있다.In the dry mixing step, in order to reduce the weight of the ceramic sound absorbing material and improve sound absorption performance, the bottom ash may be mixed with 0.1-20 parts by weight based on 100 parts by weight of the waste clay brick powder.
상기 건식 혼합하는 단계에서, 기공을 형성하여 기공율 및 흡음 성능을 향상시키기 위하여 흑연을 상기 폐점토벽돌 분말 100중량부에 대하여 0.1∼5중량부 첨가하여 함께 혼합할 수 있다.In the dry mixing step, in order to form pores to improve porosity and sound absorption performance, the graphite may be mixed with 0.1 to 5 parts by weight based on 100 parts by weight of the waste clay brick powder.
상기 건식 혼합하는 단계에서, 원적외선 방사율을 향상시키기 위하여 질석을 상기 폐점토벽돌 분말 100중량부에 대하여 0.1∼5중량부 첨가하여 함께 혼합할 수 있다.
In the dry mixing step, in order to improve far-infrared emissivity, vermiculite may be mixed together by adding 0.1 to 5 parts by weight based on 100 parts by weight of the waste clay brick powder.
본 발명에 의하면, 점토 벽돌 생산시 부산물로 발생하여 매립 폐기되어지는 무해한 폐점토벽돌을 이용하므로 고갈되어지는 천연 자원을 대체하는 환경적인 효과는 물론, 점토벽돌 업계의 연간 폐기물 처리비용 절감 등의 경제적인 효과를 얻을 수 있다.According to the present invention, since the use of harmless waste clay that is generated as a by-product and is disposed of as a by-product in the production of clay brick, the environmental effect of replacing the depleted natural resources, as well as economical reduction of annual waste disposal cost of the clay brick industry Phosphorus effect can be obtained.
본 발명에 의해 제조된 세라믹 흡음재는, 친환경적이고, 유기 휘발물질을 발생시키지 않으면서 불연성이고, 저주파 영역의 흡음특성이 우수하며, 강도가 뛰어난 특성을 갖는다.
The ceramic sound absorbing material produced by the present invention is environmentally friendly, non-flammable without generating organic volatiles, has excellent sound absorption characteristics in the low frequency region, and has excellent strength.
도 1a 내지 도 1e는 입자 크기에 따라 체거름된 폐점토벽돌의 모습을 보여주는 사진이다.
도 2는 실시예 1 내지 실시예 5에 따라 제조된 세라믹 흡음재에 대하여 주파수(frequency)에 따른 흡음계수(absorption coefficient) 특성을 보여주는 그래프로서, 폐점토벽돌의 입자 크기에 따른 흡음 성능을 비교하기 위하여 도시한 그래프이다.
도 3a 내지 도 3e는 실시예 1 내지 실시예 5에 따라 제조된 세라믹 흡음재에 대하여 주파수에 따른 흡음계수 특성을 보여주는 그래프로서, 세라믹 흡음재의 두께에 따른 흡음 성능을 비교하기 위하여 도시한 그래프이다.
도 4a 내지 도 4c는 실시예에 따라 제조된 세라믹 흡음재에 대하여 주파수에 따른 흡음계수 특성을 보여주는 그래프로서, 폐점토벽돌의 함량에 따른 흡음 특성을 비교하기 위하여 도시한 그래프이다.
도 5a 내지 도 5k는 실시예에 따라 제조된 세라믹 흡음재에 대하여 주파수에 따른 흡음계수 특성을 보여주는 그래프로서, 25mm 두께의 세라믹 흡음재를 단독으로 사용한 경우와 25mm 두께의 세라믹 흡음재를 벽체에서 25mm 간격을 두어 설치하여 25mm의 공기층(빈 공간)을 형성한 경우에 대한 흡음 성능을 비교하기 위하여 도시한 그래프이다.
도 6은 실시예에 따라 제조된 세라믹 흡음재에 대하여 압축강도를 측정하여 그 결과를 보여주는 그래프이다.
도 7은 실시예에 따라 제조된 세라믹 흡음재 샘플 사진이다.
도 8은 실시예에 따라 제조된 세라믹 흡음재의 표면을 관찰한 광학현미경 사진이다. 1a to 1e is a photograph showing the appearance of the waste clay bricks sifted according to the particle size.
Figure 2 is a graph showing the absorption coefficient (absorption coefficient) characteristics according to the frequency for the ceramic sound absorbing material prepared according to Examples 1 to 5, in order to compare the sound absorption performance according to the particle size of the waste clay brick It is a graph shown.
3A to 3E are graphs showing sound absorption coefficient characteristics according to frequency with respect to ceramic sound absorbers manufactured according to Examples 1 to 5, and are graphs for comparing sound absorption performance according to thicknesses of ceramic sound absorbers.
Figures 4a to 4c is a graph showing the sound absorption coefficient characteristics according to the frequency for the ceramic sound absorbing material prepared according to the embodiment, it is a graph showing to compare the sound absorption characteristics according to the content of the waste clay brick.
5A to 5K are graphs showing the sound absorption coefficient characteristics according to the frequency of the ceramic sound absorbing material manufactured according to the embodiment, when using a 25 mm thick ceramic sound absorbing material alone and a 25 mm thick ceramic sound absorbing material spaced 25 mm apart from the wall. It is a graph shown for comparing the sound absorption performance when the 25 mm air layer (empty space) was formed by installing.
6 is a graph showing the results of measuring the compressive strength for the ceramic sound absorbing material prepared according to the embodiment.
7 is a photograph of a ceramic sound absorbing material sample prepared according to the embodiment.
8 is an optical microscope photograph of the surface of the ceramic sound absorbing material manufactured according to the embodiment.
이하, 첨부된 도면을 참조하여 본 발명에 따른 바람직한 실시예를 상세하게 설명하기로 한다. 그러나, 이하의 실시예는 이 기술분야에서 통상적인 지식을 가진 자에게 본 발명이 충분히 이해되도록 제공되는 것으로서 여러 가지 다른 형태로 변형될 수 있으며, 본 발명의 범위가 다음에 기술되는 실시예에 한정되는 것은 아니다. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the following embodiments are provided to those skilled in the art to fully understand the present invention, and may be modified in various forms, and the scope of the present invention is limited to the embodiments described below. It doesn't happen.
본 발명은, 점토 벽돌 생산시 부산물로 발생하는 폐점토벽돌을 재활용함으로써, 고갈되어지는 천연 자원을 대체하는 환경적인 효과는 물론, 점토벽돌 업계의 연간 폐기물 처리비용 절감 등의 경제적인 효과를 얻을 수 있으며, 유기 휘발성 물질이 발생하지 않고, 불연소재이며, 소음을 방지하여 인간의 정온한 생활환경을 유지시킬 수 있는 친환경적인 세라믹 흡음재 및 그 제조방법을 제시한다. The present invention, by recycling the waste clay bricks generated as by-products in the production of clay bricks, it is possible to obtain economic effects such as reducing the annual waste disposal costs of the clay brick industry, as well as environmental effects to replace the depleted natural resources. The present invention provides an environmentally friendly ceramic sound absorbing material and a method of manufacturing the same, which do not generate organic volatile substances, are non-combustible materials, and prevent noise to maintain a calm living environment for humans.
본 발명의 친환경적인 세라믹 흡음재는 점토벽돌의 생산과정에서 부산물로 발생하여 폐기되어지는 폐점토벽돌을 이용하고, 250∼2,000Hz에 이르는 일반 생활의 소음을 저감할 수 있으며, 친환경적이고, 불연성이며, 강도와 흡음성능이 우수한 특성을 갖는다. The eco-friendly ceramic sound absorbing material of the present invention uses waste clay that is generated and discarded as a by-product in the production process of clay brick, and can reduce the noise of general life up to 250-2,000 Hz, and is eco-friendly and non-flammable. It has excellent strength and sound absorption performance.
본 발명의 바람직한 실시예에 따른 친환경적인 세라믹 흡음재는 폐점토벽돌, 상기 페점토벽돌 100중량부에 대하여 점토 5∼20중량부 및 상기 폐점토벽돌 100중량부에 대하여 프릿(Frit) 5∼20중량부를 포함한다. 또한, 상기 세라믹 흡음재는 소성 온도를 저감시키기 위하여 상기 폐점토벽돌 100중량부에 대하여 플라이애쉬(Fly ash) 0.1∼5중량부를 더 포함할 수 있다. 또한, 상기 세라믹 흡음재는 경량화시키고 흡음 성능을 향상시키기 위하여 상기 폐점토벽돌 100중량부에 대하여 바텀애쉬(bottom ash) 0.1∼20중량부를 더 포함할 수 있다. 또한, 상기 세라믹 흡음재는 미세기공 형성하여 기공율 및 흡음 성능을 향상시키기 위하여 상기 폐점토벽돌 100중량부에 대하여 흑연(graphite) 0.1∼5중량부를 더 포함할 수 있다. 또한, 상기 세라믹 흡음재는 원적외선 방사율을 향상시키기 위하여 상기 폐점토벽돌 100중량부에 대하여 질석 0.1∼5중량부를 더 포함할 수 있다. Eco-friendly ceramic sound absorbing material according to a preferred embodiment of the present invention is a waste clay brick, 5 to 20 parts by weight of clay and 100 to 5 parts by weight of frit bricks based on 100 parts by weight of the clay clay brick Contains wealth. In addition, the ceramic sound absorbing material may further include 0.1 to 5 parts by weight of fly ash based on 100 parts by weight of the closed clay brick in order to reduce the firing temperature. In addition, the ceramic sound absorbing material may further include 0.1 to 20 parts by weight of bottom ash with respect to 100 parts by weight of the closed clay brick in order to reduce the weight and improve sound absorption performance. The ceramic sound absorbing material may further include 0.1 to 5 parts by weight of graphite based on 100 parts by weight of the closed clay brick in order to form fine pores to improve porosity and sound absorption performance. In addition, the ceramic sound absorbing material may further include vermiculite 0.1 to 5 parts by weight based on 100 parts by weight of the closed clay brick to improve far-infrared emissivity.
상기 세라믹 흡음재는 10∼100mm의 두께를 갖고, 벽체로부터 10∼50mm의 간격이 이격되게 설치되어 상기 세라믹 흡음재와 상기 벽체 사이에 공기층이 형성되게 구비될 수 있다. The ceramic sound absorbing material may have a thickness of 10 to 100 mm, and is spaced apart from the wall by 10 to 50 mm so that an air layer is formed between the ceramic sound absorbing material and the wall.
본 발명의 친환경적인 세라믹 흡음재는 폐점토벽돌 분말, 상기 폐점토벽돌 100중량부에 대하여 점토 5∼20중량부, 상기 폐점토벽돌 100중량부에 대하여 프릿(Frit) 5∼20중량부 및 상기 폐점토벽돌 100중량부에 대하여 카르복시메틸셀룰로오스(carboxymethylcelluose; CMC) 1∼8중량부를 1차 건식 혼합하고, 이 혼합물에 수분을 페점토벽돌 분말 100중량부에 대하여 10∼20중량부 첨가하여 2차 혼합을 한 후, 압축프레스를 이용하여 일축 성형한 후, 1,000∼1100℃의 온도에서 소성하여 제조할 수 있다. 상기 1차 건식 혼합 과정에서 상기 폐점토벽돌 100중량부에 대하여 플라이애쉬(Fly ash) 0.1∼5중량부, 바텀애쉬(bottom ash) 0.1∼20중량부, 흑연(graphite) 0.1∼5중량부 또는 질석 0.1∼5중량부를 함께 첨가하여 혼합할 수 있다. Environmentally friendly ceramic sound absorbing material of the present invention is a clay clay powder, 5 to 20 parts by weight of clay based on 100 parts by weight of the waste clay brick, 5 to 20 parts by weight of frit based on 100 parts by weight of the waste clay brick and the closed
점토벽돌 생산 공정에서 발생하는 폐점토벽돌은 5∼4mm, 4∼2mm, 2∼1mm, 1∼0.6mm, 0.6∼0.3mm 등과 같이 입도를 분리하여 사용하며, 폐점토벽돌은 소재를 이루는 골격의 역할을 한다. 폐점토벽돌은 세라믹 흡음재 100중량부에 대하여 60∼90중량부 함유되는 것이 바람직하며, 폐점토벽돌의 함량이 60중량부 미만일 경우에는 골격을 이루는 폐점토벽돌보다 미립분인 점토와 프릿의 양이 많아져 음(音)의 통로가 되는 공극을 막아 흡음 특성을 떨어뜨릴 수 있고, 90중량부를 초과하는 경우에는 가소성과 소결성을 향상시키는 미립분이 부족하여 과다한 성형압력과 1500℃ 이상의 소성 온도를 필요로 하므로 불필요한 에너지를 요구하게 되어 제조비용을 상승시킬 수 있다. The waste clay bricks produced in the clay brick production process are divided into particle sizes such as 5 to 4 mm, 4 to 2 mm, 2 to 1 mm, 1 to 0.6 mm, and 0.6 to 0.3 mm. Play a role. The waste clay brick is preferably contained 60 to 90 parts by weight based on 100 parts by weight of the ceramic sound-absorbing material. When the content of the waste clay brick is less than 60 parts by weight, the amount of fine clay and frit that is finer than the waste clay brick To increase the sound absorbing properties by blocking the voids that become negative passages, and when exceeding 90 parts by weight, there is a shortage of fine particles to improve plasticity and sinterability, requiring excessive molding pressure and firing temperature of 1500 ° C or higher. Therefore, it requires unnecessary energy and can increase the manufacturing cost.
세라믹 흡음재의 골격을 이루는 폐점토벽돌을 연결하기 위해 점토를 사용한다. 상기 점토는 천연상태의 점토를 물속에 넣어 불순물을 걸러낸 후 미세하고 부드러운 입자를 걷어서 건조하여 얻은 것(수비점토)으로, 상기 점토는 상기 폐점토벽돌 100중량부에 대하여 5∼20중량부 첨가되는 것이 바람직한데, 점토의 함량이 상기 폐점토벽돌 100중량부에 대하여 5중량부 미만일 경우에는 가소성이 떨어져 성형의 어려움이 생길 수 있고, 20중량부를 초과하는 경우에는 미립분이 많아져 음(音)의 통로가 되는 공극을 막아 흡음 특성을 떨어뜨릴 수 있다.Clay is used to connect the waste clay bricks that form the skeleton of the ceramic sound absorbing material. The clay is obtained by putting natural clay in water to filter out impurities and then drying by drying fine and soft particles (defense clay). The clay is added in an amount of 5 to 20 parts by weight based on 100 parts by weight of the waste clay brick. If the content of clay is less than 5 parts by weight with respect to 100 parts by weight of the waste clay brick, plasticity may be difficult to form, and if it exceeds 20 parts by weight, the fines are increased. The sound absorption characteristics can be reduced by blocking the voids that become the passages.
상기 프릿(Frit)은 유약제조 시 사용되는 미분 유리로, 소결시 점토와 반응하여 폐점토벽돌을 서로 연결시켜 강도를 유지시켜주는 역할을 한다. 상기 프릿은 상기 폐점토벽돌 100중량부에 대하여 5∼20중량부 첨가되는 것이 바람직하며, 프릿의 함량이 상기 폐점토벽돌 100중량부에 대하여 5중량부 미만일 경우에는 유리화 온도가 높아져 소결시 고온이 요구되어 에너지 소비가 심해질 수 있고, 20중량부를 초과하는 경우에는 유리상이 많이 형성되어 골격을 이루는 폐점토벽돌과 폐점토벽돌 사이의 공극을 메워 흡음 성능을 떨어뜨리거나 소결 온도 범위를 좁혀 생산의 어려움을 가져올 수 있다.The frit is a fine glass used in glazing, and reacts with clay during sintering to connect waste clay bricks to each other to maintain strength. The frit is preferably added in an amount of 5 to 20 parts by weight based on 100 parts by weight of the waste clay brick, and when the content of the frit is less than 5 parts by weight based on 100 parts by weight of the waste clay brick, the vitrification temperature is increased to increase the high temperature during sintering. The energy consumption can be increased, and if it exceeds 20 parts by weight, a lot of glass phase is formed to fill the voids between the closed clay bricks and the waste clay bricks, which reduces the sound absorption performance or narrows the sintering temperature range. Can bring
카르복시메틸셀룰로오스(carboxymethylcelluose; CMC)는 유기바인더로서 흡음재의 모형을 형성하는 성형단계에서 물과 혼합되어 성형을 용이하게 한다. 상기 카르복시메틸셀룰로오스는 상기 폐점토벽돌 100중량부에 대하여 1∼8중량부 첨가하는 것이 바람직하며, 카르복시메틸셀룰로오스의 함량이 상기 폐점토벽돌 100중량부에 대하여 1중량부 미만일 경우에는 소량으로 성형성 향상에 도움이 되지 못하며, 8중량부를 초과하는 경우에는 폐점토벽돌을 코팅시킬 미립분인 점토와 프릿을 엉겨붙게 하여 균질한 코팅이 이루어지지 못하여 소성 완제품의 균질성을 떨어뜨릴 수 있으며 또한, 성형시 금형몰드를 오염시켜 작업성이 떨어질 수 있다.Carboxymethyl cellulose (CMC) is an organic binder that is mixed with water in the forming step of forming a model of the sound absorbing material to facilitate molding. The carboxymethyl cellulose is preferably added 1 to 8 parts by weight based on 100 parts by weight of the waste clay brick, and when the content of the carboxymethyl cellulose is less than 1 part by weight based on 100 parts by weight of the waste clay brick, If it is more than 8 parts by weight, it does not help to improve the homogeneity of the plastic finished product by crushing the clay and frit, which are the fine particles to coat the waste clay bricks, to prevent the homogeneous coating. Contamination of the mold mold may reduce workability.
상기 플라이애쉬를 첨가하게 되면 소성 온도를 저감시킬 수 있는 효과가 있다. 상기 플라이애쉬는 상기 폐점토벽돌 100중량부에 대하여 0.1∼5중량부 첨가하는 것이 바람직하며, 플라이애쉬의 함량이 상기 폐점토벽돌 100중량부에 대하여 0.1중량부 미만이면 소성 온도 저감 효과가 미약하고, 5중량부를 초과하는 경우에는 탁한 색상이 발현되고 소성 온도 범위 축소로 작업성이 어려워질 수 있다.Adding the fly ash has an effect of reducing the firing temperature. Preferably, the fly ash is added in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the waste clay brick, and when the content of the fly ash is less than 0.1 parts by weight based on 100 parts by weight of the waste clay brick, the effect of reducing the firing temperature is weak. In the case of exceeding 5 parts by weight, a turbid color may be expressed and workability may be difficult due to a reduction in the firing temperature range.
상기 바텀애쉬는 가벼운 소재이므로 폐점토벽돌을 일부 대신하여 첨가하게 되면 세라믹 흡음재를 경량화시킬 수 있고 흡음 성능을 향상시킬 수 있다. 상기 바텀애쉬는 상기 폐점토벽돌 100중량부에 대하여 0.1∼20중량부 첨가하는 것이 바람직하며, 바텀애쉬의 함량이 상기 폐점토벽돌 100중량부에 대하여 0.1중량부 미만이면 경량화 효과가 미약하고 흡음 성능 개선 효과도 미약하며, 20중량부를 초과하는 경우에는 온도에 민감해져 소성 과정에서 쉽게 변형될 수 있다. Since the bottom ash is a light material, if the waste clay brick is added in place of a part of the bottom ash, the ceramic sound absorbing material can be reduced in weight and the sound absorbing performance can be improved. The bottom ash is preferably added in an amount of 0.1 to 20 parts by weight based on 100 parts by weight of the waste clay brick. When the content of the bottom ash is less than 0.1 part by weight based on 100 parts by weight of the waste clay brick, the weight reduction effect is weak and the sound absorption performance is weak. The improvement effect is also weak and, if it exceeds 20 parts by weight, it is sensitive to temperature and can be easily deformed during firing.
상기 흑연은 추가적인 미세 기공을 형성시켜 기공율 및 흡음 성능을 향상시키기 위하여 첨가한다. 상기 흑연은 상기 폐점토벽돌 100중량부에 대하여 0.1∼5중량부 첨가하는 것이 바람직하며, 흑연의 함량이 상기 폐점토벽돌 100중량부에 대하여 0.1중량부 미만이면 흡음 성능 개선 효과가 미약하고, 5중량부를 초과하는 경우에는 과다 발열과 과다 기공 형성으로 소성 후 강도 저하를 유발할 수 있다. The graphite is added to form additional fine pores to improve porosity and sound absorption performance. Preferably, the graphite is added in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the waste clay brick. When it exceeds the weight part, excessive heat generation and excessive pore formation may cause a decrease in strength after firing.
상기 질석은 원적외선 방사율을 향상시키기 위하여 첨가한다. 상기 질석은 상기 폐점토벽돌 100중량부에 대하여 0.1∼5중량부 첨가하는 것이 바람직하며, 질석의 함량이 상기 폐점토벽돌 100중량부에 대하여 0.1중량부 미만이면 원적외선 방사율 향상 효과가 미약하고, 5중량부를 초과하는 경우에는 팽창하는 성질로 인하여 소성 시 세라믹 흡음재를 변형시킬 수 있고 고가의 원료이므로 제조 원가를 상승시킬 수 있다.
The vermiculite is added to improve far-infrared emissivity. The vermiculite is preferably added in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the waste clay brick, and when the content of vermiculite is less than 0.1 part by weight based on 100 parts by weight of the waste clay brick, the effect of improving far-infrared emissivity is weak. In the case of exceeding the weight part, the ceramic sound-absorbing material may be deformed during firing due to the property of expansion, and the manufacturing cost may be increased because it is an expensive raw material.
이하에서 본 발명의 바람직한 실시예에 따른 친환경적인 세라믹 흡음재 제조방법을 설명한다. Hereinafter will be described an environmentally friendly ceramic sound absorbing material manufacturing method according to a preferred embodiment of the present invention.
먼저, 폐점토벽돌을 크러셔로 분쇄하여 폐점토벽돌 분말을 일정 크기로 체가름하여 균일한 입도의 폐점토벽돌 분말을 준비한다. 상기 폐점토벽돌 분말이 0.3∼5mm의 입자 크기를 갖도록 상기 폐점토벽돌을 분쇄하는 것이 바람직하다. First, the waste clay brick is crushed with a crusher to sift the waste clay brick to a predetermined size to prepare a waste clay brick powder of uniform particle size. It is preferable to grind the waste clay brick so that the waste clay brick has a particle size of 0.3 to 5 mm.
상기 폐점토벽돌 분말 100중량부에 대하여 점토 5∼20중량부, 프릿(frit) 5∼20중량부 및 카르복시메틸셀룰로오스(CMC) 1∼8중량부를 건식 혼합기로 건식 혼합한다. 이때, 상기 폐점토벽돌 분말 100중량부에 대하여 플라이애쉬(Fly ash) 0.1∼5중량부, 바텀애쉬(bottom ash) 0.1∼20중량부, 흑연(graphite) 0.1∼5중량부 또는 질석 0.1∼5중량부를 함께 첨가하여 혼합할 수 있다. 5 to 20 parts by weight of clay, 5 to 20 parts by weight of frit and 1 to 8 parts by weight of carboxymethyl cellulose (CMC) are dry-mixed with a dry mixer based on 100 parts by weight of the waste clay brick powder. In this case, 0.1 to 5 parts by weight of fly ash, 0.1 to 20 parts by weight of bottom ash, 0.1 to 5 parts by weight of graphite or 0.1 to 5 parts of vermiculite, based on 100 parts by weight of the waste clay brick powder. The parts by weight may be added together and mixed.
믹서기(예컨대, 리본 믹서기)에 체가름된 폐점토벽돌 분말과 상기 폐점토벽돌 분말 100중량부에 대하여 수분(물) 10∼20중량부를 첨가하고, 건식혼합된 원료를 믹서기에 혼합하여 폐점토벽돌 분말의 표면에 코팅되게 한다. 10-20 parts by weight of water (water) is added to 100 parts by weight of the waste clay brick powder sifted to a blender (for example, a ribbon mixer), and the dry mixed raw materials are mixed in a blender to close the waste clay brick. Allow to be coated on the surface of the powder.
믹서기에서 혼합된 원료를 압축프레스를 이용하여 요구되는 모형대로 성형한다. 압축프레스에 의해 인가되는 압력은 폐점토벽돌 분말이 부서지지 않을 정도의 압력을 가한다. 소성되어 형성된 세라믹 흡음재가 10∼100mm의 두께를 갖도록 성형하는 것이 바람직하다.The raw materials mixed in the blender are molded into the required model using a compression press. The pressure applied by the compression press exerts a pressure such that the waste clay brick is not broken. It is preferable to shape | mold so that the ceramic sound absorption material formed by baking may have thickness of 10-100 mm.
성형물을 60∼100℃의 온도에서 1∼24시간 동안 소정 함수분 미만(예컨대, 함수분 1중량% 미만)이 되도록 건조한다. The molded article is dried to a predetermined moisture content (e.g., less than 1% by weight of water content) for 1 to 24 hours at a temperature of 60 to 100 ° C.
건조물을 900∼1200℃, 바람직하게는 1000∼1100℃의 온도에서 30분∼12시간 동안 소성한다. 상기 소성 공정은 카르복시메틸셀룰로오스의 타는 온도보다 높고 프릿(frit)의 녹는점보다 낮으며 프릿(frit)의 유리전이점보다 높은 온도에서 실시하는데, 예컨대 900∼1200℃의 온도에서 소성시킨다. 상기 소성은 연결식 가마(예컨대, 터널가마 또는 롤러식 가마)에서 30분∼12시간 실시하는 것이 바람직하다. 카르복시메틸셀룰로오스는 승온 과정 및 소성 과정에서 태워져서 없어지게 된다. 소성 공정을 수행한 후, 퍼니스(furnace) 온도를 하강시켜 소성된 결과물을 언로딩한다. 상기 퍼니스 냉각은 퍼니스 전원을 차단하여 자연적인 상태로 냉각되게 하거나, 임의적으로 온도 하강률(예컨대, 10∼15℃/min)을 설정하여 냉각되게 할 수도 있다. The dried product is fired at a temperature of 900 to 1200 ° C, preferably 1000 to 1100 ° C for 30 minutes to 12 hours. The firing process is carried out at a temperature higher than the burning temperature of the carboxymethyl cellulose, lower than the melting point of the frit and higher than the glass transition point of the frit, for example, firing at a temperature of 900 to 1200 ℃. The firing is preferably carried out in a connected kiln (for example, a tunnel kiln or a roller kiln) for 30 minutes to 12 hours. The carboxymethyl cellulose is burned away during the temperature raising process and the firing process. After carrying out the firing process, the furnace temperature is lowered to unload the fired product. The furnace cooling may be cooled to a natural state by shutting off the furnace power source, or may be cooled by arbitrarily setting a temperature drop rate (for example, 10 to 15 ° C./min).
소성이 완료되면, 수분 및 카르복시메틸셀룰로오스 성분은 모두 없어지고, 세라믹 흡음재의 조성을 이루는 성분만이 남아있는 세라믹 흡음재가 얻어진다. 이렇게 형성된 세라믹 흡음재는 세라믹 흡음재와 벽체 사이에 공기층이 형성되게 상기 벽체로부터 10∼50mm의 간격이 이격되게 형성할 수 있다.
When the firing is completed, both the moisture and the carboxymethyl cellulose components are lost, and a ceramic sound absorbing material is obtained in which only components constituting the ceramic sound absorbing material remain. The ceramic sound absorbing material thus formed may be formed to be spaced apart from the wall by 10 to 50 mm so that an air layer is formed between the ceramic sound absorbing material and the wall.
이하에서, 본 발명에 따른 세라믹 흡음재의 실시예들을 더욱 구체적으로 제시하며, 다음에 제시하는 실시예들에 의하여 본 발명이 한정되는 것은 아니다. Hereinafter, the embodiments of the ceramic sound absorbing material according to the present invention will be described in more detail, and the present invention is not limited to the following examples.
폐점토벽돌을 크러셔로 분쇄하여 폐점토벽돌 분말을 5∼4mm, 4∼2mm, 2∼1mm, 1∼0.6mm, 0.6∼0.3mm 크기로 체가름하여 폐점토벽돌 분말을 준비하였다. 도 1a 내지 도 1e는 입자 크기에 따라 체거름된 폐점토벽돌의 모습을 보여주는 사진으로서, 도 1a는 5∼4mm의 크기로 체거름된 폐점토벽돌의 모습을 보여주고, 도 1b는 4∼2mm의 크기로 체거름된 폐점토벽돌의 모습을 보여주며, 도 1c는 2∼1mm의 크기로 체거름된 폐점토벽돌의 모습을 보여주고, 도 1d는 1∼0.6mm의 크기로 체거름된 폐점토벽돌의 모습을 보여주며, 도 1e는 0.6∼0.3mm의 크기로 체거름된 폐점토벽돌의 모습을 보여주고 있다. The waste clay bricks were crushed with a crusher to sift the waste clay bricks into sizes of 4 to 4 mm, 4 to 2 mm, 2 to 1 mm, 1 to 0.6 mm, and 0.6 to 0.3 mm to prepare waste clay bricks. Figure 1a to 1e is a photograph showing the appearance of the crushed clay brick sifted according to the particle size, Figure 1a shows the appearance of the crushed clay brick sieved to a size of 5 ~ 4mm,
점토, 프릿(frit) 및 카르복시메틸셀룰로오스(CMC)를 건식 혼합기로 건식 혼합하고, 리본 믹서기에 체가름된 폐점토벽돌 분말과 물을 첨가하고, 건식혼합된 원료를 믹서기에 혼합하여 폐점토벽돌 분말의 표면에 코팅되게 하였다. Dry mix clay, frit and carboxymethyl cellulose (CMC) with a dry mixer, add waste clay brick and water sifted to a ribbon mixer and mix the dry mixed raw materials with a blender On the surface of the substrate.
믹서기에서 혼합된 원료를 지름 70mm인 원형몰드에 넣고, 일축 압축프레스를 이용하여 25mm와 50mm의 두께로 성형하였다. The raw materials mixed in the blender were placed in a circular mold having a diameter of 70 mm, and formed into a thickness of 25 mm and 50 mm by using a uniaxial compression press.
성형물을 60∼100℃의 온도에서 12∼24시간 동안 소정 함수분 미만(예컨대, 함수분 1중량% 미만)이 되도록 건조하였다. The moldings were dried to a predetermined moisture content (e.g., less than 1% by weight of water content) for 12 to 24 hours at a temperature of 60 to 100 ° C.
건조물을 1100∼1160℃에서 2시간 동안 소성하고, 자연 냉각하여 세라믹 흡음재를 얻었다.The dried product was calcined at 1100 to 1160 ° C. for 2 hours, and naturally cooled to obtain a ceramic sound absorbing material.
실시예들에 따른 폐점토벽돌 입자의 크기, 성분의 함량 등을 아래의 표 1에 나타내었다. The size of the waste clay brick particles according to the embodiments, the content of the components and the like are shown in Table 1 below.
clay
(frit)
Frit
(frit)
아래의 표 2에 각 실시예들에 따른 특성을 나타내었다.Table 2 below shows the characteristics according to the embodiments.
샘플명
Sample name
기공률
(%)
Porosity
(%)
NRC
(Hz)Low frequency range
(Hz)
NRC
(Hz)Low frequency range
(Hz)
NRC
(Hz)Low frequency range
(Hz)
위의 표 2에서 'NRC'는 감음계수(Noise Reduction Coefficient)를 의미한다. 또한, 표 2에서 '25mm 단독소재'는 25mm 두께의 세라믹 흡음재에 대하여 실험한 결과를 나타낸 것이고, '50mm 단독소재'는 50mm 두께의 세라믹 흡음재에 대하여 실험한 결과를 나타낸 것이며, '5mm 단독소재+공기층 25mm'는 25mm 두께의 세라믹 흡음재를 벽체에서 25mm 간격을 두어 설치하여 25mm의 빈 공간(공기층)을 형성한 것에 대하여 실험한 결과이다.
In Table 2 above, 'NRC' means Noise Reduction Coefficient. In addition, in Table 2, '25mm single material' shows the results of experiments on the 25mm thick ceramic sound absorbing material, '50mm single material' shows the results of the experiment on the 50mm thick ceramic sound absorbing material, '5mm single material + The air layer 25mm 'is a result of experiments in which a 25mm-thick ceramic sound absorbing material was installed 25mm apart from the wall to form a 25mm empty space (air layer).
도 2는 실시예 1 내지 실시예 5에 따라 제조된 세라믹 흡음재에 대하여 주파수(frequency)에 따른 흡음계수(absorption coefficient) 특성을 보여주는 그래프로서, 폐점토벽돌의 입자 크기에 따른 흡음 성능을 비교할 수 있다. 실시예 1은 5∼4mm 입자 크기의 폐점토벽돌을 사용한 경우이고, 실시예 2는 4∼2mm 입자 크기의 폐점토벽돌을 사용한 경우이며, 실시예 3은 2∼1mm 입자 크기의 폐점토벽돌을 사용한 경우이고, 실시예 4는 1∼0.6mm 입자 크기의 폐점토벽돌을 사용한 경우이며, 실시예 5는 0.6∼0.3mm 입자 크기의 폐점토벽돌을 사용한 경우이다. Figure 2 is a graph showing the absorption coefficient (absorption coefficient) characteristics according to the frequency (frequency) for the ceramic sound absorbing material prepared according to Examples 1 to 5, it can compare the sound absorption performance according to the particle size of the waste clay brick. . Example 1 is a case of using a waste clay brick of 5 ~ 4mm particle size, Example 2 is a case of using a waste clay brick of 4 ~ 2mm particle size, Example 3 is a waste clay brick of 2 ~ 1mm particle size Example 4 is a case where waste clay bricks of 1 to 0.6 mm particle size are used, and Example 5 is a case of waste clay bricks of 0.6 to 0.3 mm particle size.
도 2를 참조하면, 실시예 1 내지 실시예 3에 해당하는 주파수(frequency)에 따른 흡음계수(absorption coefficient) 그래프를 보면 폐점토벽돌의 입자 크기가 작아질수록 고주파 쪽으로 피크(peak)가 이동하는 것을 볼 수 있다. 또한, 실시예 3 내지 실시예 5에 해당하는 주파수에 따른 흡음계수 그래프를 보면 폐점토벽돌의 입자 크기가 작아질수록 흡음률은 감소하지만 전체 영역은 넓어지는 것을 볼 수 있다.
2, when the absorption coefficient (absorption coefficient) graph according to the frequency (frequency) corresponding to Examples 1 to 3, the peak (peak) is moved toward the high frequency as the particle size of the closed clay brick is smaller You can see that. In addition, when looking at the sound absorption coefficient graph according to the frequency corresponding to Examples 3 to 5, it can be seen that as the particle size of the closed clay brick decreases, the sound absorption rate decreases but the entire area becomes wider.
도 3a 내지 도 3e는 실시예 1 내지 실시예 5에 따라 제조된 세라믹 흡음재에 대하여 주파수(frequency)에 따른 흡음계수(absorption coefficient) 특성을 보여주는 그래프로서, 세라믹 흡음재의 두께에 따른 흡음 성능을 비교할 수 있다. 도 3a 내지 도 3e에서 실선으로 표시된 그래프는 25mm 두께의 세라믹 흡음재에 대한 것이고, 점선으로 표신된 그래프는 50mm 두께의 세라믹 흡음재에 대한 것이다. 3A to 3E are graphs showing the absorption coefficient characteristics according to frequency with respect to the ceramic sound absorbing materials manufactured according to Examples 1 to 5, and the sound absorption performance according to the thickness of the ceramic sound absorbing materials may be compared. have. 3A to 3E are graphs represented by solid lines for the ceramic sound absorbers having a thickness of 25 mm, and graphs represented by dotted lines are for ceramic sound absorbers having a thickness of 50 mm.
도 3a 내지 도 3e를 참조하면, 입자 크기가 큰 폐점토벽돌을 사용한 경우(실시예 1 및 실시예 2에 따라 제조된 세라믹 흡음재)에는 두께가 25mm에서 50mm로 증가함에 따라 흡음률이 증가하는 것을 볼 수 있다. 입자 크기가 작은 폐점토벽돌을 사용한 경우(실시예 3 및 실시예 4에 따라 제조된 세라믹 흡음재)에는 두께가 25mm에서 50mm로 증가함에 따라 저주파 대역으로 흡음대역폭이 확장되는 것을 볼 수 있다. 입자 크기가 아주 작은 폐점토벽돌을 사용한 경우(실시예 5에 따라 제조된 세라믹 흡음재)에는 시료(세라믹 흡음재) 두께에 따른 영향은 크지 않음을 볼 수 있다.
3a to 3e, when the waste clay brick having a large particle size (ceramic sound absorbing material prepared according to Examples 1 and 2) is used, the sound absorption rate increases as the thickness increases from 25 mm to 50 mm. Can be. In the case of using a closed clay brick having a small particle size (ceramic sound absorbing material prepared according to Examples 3 and 4), it can be seen that the sound absorption bandwidth is extended to the low frequency band as the thickness increases from 25 mm to 50 mm. In the case of using a closed clay brick having a very small particle size (ceramic sound absorbing material prepared according to Example 5), it can be seen that the effect of the thickness of the sample (ceramic sound absorbing material) is not large.
도 4a 내지 도 4c는 실시예에 따라 제조된 세라믹 흡음재에 대하여 주파수(frequency)에 따른 흡음계수(absorption coefficient) 특성을 보여주는 그래프로서, 폐점토벽돌의 함량에 따른 흡음 특성을 보여주고 있다. 도 4a는 실시예 3, 실시예 6 및 실시예 7에 따라 제조된 25mm 두께의 세라믹 흡음재에 대한 것으로서, 실시예 3은 폐점토벽돌을 75중량% 함유한 경우이고 실시예 6은 폐점토벽돌을 80중량% 함유한 경우이며 실시예 7은 폐점토벽돌을 85중량% 함유한 경우에 대한 것이다. 도 4b는 실시예 4, 실시예 8 및 실시예 9에 따라 제조된 25mm 두께의 세라믹 흡음재에 대한 것으로서, 실시예 4은 폐점토벽돌을 75중량% 함유한 경우이고 실시예 8은 폐점토벽돌을 80중량% 함유한 경우이며 실시예 9는 폐점토벽돌을 85중량% 함유한 경우에 대한 것이다. 도 4c는 실시예 5, 실시예 10 및 실시예 11에 따라 제조된 25mm 두께의 세라믹 흡음재에 대한 것으로서, 실시예 5는 폐점토벽돌을 75중량% 함유한 경우이고 실시예 10은 폐점토벽돌을 80중량% 함유한 경우이며 실시예 11은 폐점토벽돌을 85중량% 함유한 경우에 대한 것이다. 4A to 4C are graphs showing the absorption coefficient characteristics according to the frequency of the ceramic sound absorbing material manufactured according to the embodiment, and show the sound absorption characteristics according to the content of the waste clay brick. Figure 4a is for a 25 mm thick ceramic sound absorbing material prepared according to Examples 3, 6 and 7, Example 3 is the case containing 75% by weight of the waste clay brick and Example 6 is a waste clay brick 80 wt%, and Example 7 relates to a case containing 85 wt% of the waste clay brick. Figure 4b is for the 25 mm thick ceramic sound absorbing material prepared according to Example 4, Example 8 and Example 9, Example 4 containing 75% by weight of the waste clay brick and Example 8 is a waste clay brick 80 wt%, and Example 9 relates to a case containing 85 wt% of the waste clay brick. Figure 4c is a 25 mm thick ceramic sound absorbing material prepared according to Example 5, Example 10 and Example 11, Example 5 is the case containing 75% by weight of the waste clay brick and Example 10 is a waste clay brick 80 wt%, and Example 11 relates to a case containing 85 wt% of the waste clay brick.
도 4a 내지 도 4c를 참조하면, 폐점토벽돌의 함량이 증가함에 따라 표 2에 나타난 바와 같이 공극(기공률)이 커지고 도 4a 내지 도 4c에 나타난 바와 같이 흡음률도 증가하는 것으로 나타났다. 흡음률은 실시예 3, 실시예 6 및 실시예 7을 비교할 때 폐점토벽돌의 함량이 가장 많은 실시예 7의 경우가 가장 높게 나타났고, 실시예 4, 실시예 8 및 실시예 9를 비교할 때 폐점토벽돌의 함량이 가장 많은 실시예 9의 경우가 가장 높게 나타났으며, 실시예 5, 실시예 10 및 실시예 11을 비교할 때 폐점토벽돌의 함량이 가장 많은 실시예 11의 경우가 가장 높게 나타났다.
4A to 4C, as the content of the closed clay brick is increased, the porosity (porosity) is increased as shown in Table 2, and the sound absorption rate is also increased as shown in FIGS. 4A to 4C. The sound absorption rate was the highest in Example 7, where the content of the closed clay brick was the highest when comparing Example 3, Example 6, and Example 7, and when closing Example 4, Example 8, and Example 9 Example 9 with the highest content of clay bricks was the highest, and Example 11 with the highest content of waste clay bricks was the highest compared to Examples 5, 10 and 11. .
도 5a 내지 도 5k는 실시예에 따라 제조된 세라믹 흡음재에 대하여 주파수(frequency)에 따른 흡음계수(absorption coefficient) 특성을 보여주는 그래프로서, 25mm 두께의 세라믹 흡음재를 단독으로 사용한 경우와 25mm 두께의 세라믹 흡음재를 벽체에서 25mm 간격을 두어 설치하여 25mm의 공기층(빈 공간)을 형성한 경우에 대한 흡음 성능을 보여주고 있다. 도 5a 내지 도 5k에서 실선으로 표시된 그래프는 25mm 두께의 세라믹 흡음재를 단독으로 사용하여 흡음 성능을 측정한 경우이고, 점선으로 표시된 그래프는 25mm 두께의 세라믹 흡음재를 벽체에서 25mm 간격을 두어 설치하여 25mm의 공기층(빈 공간)을 형성하여 흡음 성능을 측정한 경우이다.5A to 5K are graphs showing the absorption coefficient characteristics according to frequency with respect to the ceramic sound absorbing material manufactured according to the embodiment, wherein a 25 mm thick ceramic sound absorbing material is used alone and a 25 mm thick ceramic sound absorbing material. Is installed 25mm apart from the wall, showing the sound absorption performance of the case of forming a 25mm air layer (empty space). 5A to 5K are graphs in which solid sound absorbing materials are measured using a 25 mm thick ceramic sound absorber alone, and a graph shown in dotted lines shows 25 mm thick ceramic sound absorbing materials installed at 25 mm intervals from a wall. This is the case where sound absorption performance was measured by forming an air layer (empty space).
도 5a 내지 도 5k를 참조하면, 모든 실시예에서 25mm의 공기층을 형성한 경우에서 저주파 대역의 흡음 성능이 향상됨을 볼 수 있다.
5A to 5K, it can be seen that the sound absorption performance of the low frequency band is improved in the case of forming an air layer of 25 mm in all embodiments.
도 6은 실시예에 따라 제조된 세라믹 흡음재에 대하여 압축강도를 측정하여 그 결과를 보여주는 그래프이다. 압축강도는 KS L 4201에 따라 측정하였다. 실시예 1은 5∼4mm 입자 크기의 폐점토벽돌을 사용한 경우이고, 실시예 2는 4∼2mm 입자 크기의 폐점토벽돌을 사용한 경우이며, 실시예 3은 2∼1mm 입자 크기의 폐점토벽돌을 사용한 경우이고, 실시예 4, 실시예 8 및 실시예 9는 1∼0.6mm 입자 크기의 폐점토벽돌을 사용한 경우이며, 실시예 5, 실시예 10 및 실시예 11은 0.6∼0.3mm 입자 크기의 폐점토벽돌을 사용한 경우이다. 실시예 4 및 실시예 5는 폐점토벽돌을 75중량% 함유한 경우이고 실시예 8 및 실시예 10은 폐점토벽돌을 80중량% 함유한 경우이며 실시예 9 및 실시예 11은 폐점토벽돌을 85중량% 함유한 경우에 대한 것이다. 6 is a graph showing the results of measuring the compressive strength for the ceramic sound absorbing material prepared according to the embodiment. Compressive strength was measured according to KS L 4201. Example 1 is a case of using a waste clay brick of 5 ~ 4mm particle size, Example 2 is a case of using a waste clay brick of 4 ~ 2mm particle size, Example 3 is a waste clay brick of 2 ~ 1mm particle size Example 4, Example 8 and Example 9 were used when the closed clay brick of 1 ~ 0.6mm particle size, Example 5, Example 10 and Example 11 is 0.6 ~ 0.3mm particle size This is the case when a closed clay brick is used. Example 4 and Example 5 is a case containing 75% by weight of the waste clay bricks and Examples 8 and 10 is a case containing 80% by weight of the waste clay bricks and Examples 9 and 11 It is about the case containing 85 weight%.
도 6을 참조하면, 실시예 1 내지 실시예 4에서 관찰되는 바와 같은 폐점토벽돌의 입자 크기가 작아짐에 따라 압축강도가 증가함을 확인할 수 있다. 또한, 실시예 4, 실시예 8 및 실시예 9를 비교할 때 폐점토벽돌의 함량이 증가함에 따라 압축강도는 감소하는 것을 볼 수 있다. 또한, 실시예 5, 실시예 10 및 실시예 11을 비교할 때 폐점토벽돌의 함량이 증가함에 따라 압축강도가 감소하는 것을 확인할 수 있다. 실시예 4와 실시예 5를 비교할 때 0.6∼0.3mm 입자 크기의 폐점토벽돌을 사용한 실시예 5의 경우가 1∼0.6mm 입자 크기의 폐점토벽돌을 사용한 실시예 4의 경우에 비하여 압축강도가 감소하는 것으로 나타났다.
Referring to Figure 6, it can be seen that the compressive strength increases as the particle size of the closed clay bricks as observed in Examples 1 to 4. In addition, when comparing Examples 4, 8 and 9 it can be seen that the compressive strength decreases as the content of the closed clay brick increases. In addition, when comparing the Example 5, Example 10 and Example 11, it can be seen that the compressive strength decreases as the content of the closed clay brick increases. When comparing Example 4 and Example 5, the compressive strength of Example 5 using the waste clay bricks of 0.6 to 0.3 mm particle size was higher than that of Example 4 using the waste clay bricks of 1 to 0.6 mm particle size. It appeared to decrease.
도 7은 실시예에 따라 제조된 세라믹 흡음재 샘플 사진이다. 도 8은 실시예에 따라 제조된 세라믹 흡음재의 표면을 관찰한 광학현미경 사진이다. 도 7 및 도 8을 참조하면, 실시예 1 내지 실시예 5에서 관찰되는 바와 같은 폐점토벽돌의 입자 크기가 작아짐에 따라 표면이 매끄럽고 공극이 작아짐을 볼 수 있다.
7 is a photograph of a ceramic sound absorbing material sample prepared according to the embodiment. 8 is an optical microscope photograph of the surface of the ceramic sound absorbing material manufactured according to the embodiment. Referring to FIGS. 7 and 8, it can be seen that as the particle size of the closed clay bricks as observed in Examples 1 to 5 decreases, the surface becomes smooth and the voids decrease.
이상, 본 발명의 바람직한 실시예를 들어 상세하게 설명하였으나, 본 발명은 상기 실시예에 한정되는 것은 아니며, 본 발명의 기술적 사상의 범위내에서 당 분야에서 통상의 지식을 가진 자에 의하여 여러 가지 변형이 가능하다.As mentioned above, although preferred embodiment of this invention was described in detail, this invention is not limited to the said embodiment, A various deformation | transformation by a person of ordinary skill in the art within the scope of the technical idea of this invention is carried out. This is possible.
Claims (14)
A waste clay brick forming a skeleton of a ceramic sound absorbing material, a clay connecting the space between the waste clay brick and a frit connecting the waste clay brick and the clay to each other to maintain strength, the clay is the waste clay brick 5 to 15 parts by weight, based on 100 parts by weight, and the frit contains 5 to 15 parts by weight based on 100 parts by weight of the closed clay brick.
The environmentally friendly ceramic sound absorbing material of claim 1, wherein the waste clay brick has a particle size of 0.3 to 5 mm.
The method of claim 1, wherein the ceramic sound absorbing material has a thickness of 10 to 100mm, 10 to 50mm spaced apart from the wall is installed so that the air layer is formed between the ceramic sound absorbing material and the wall is environmentally friendly Ceramic sound absorbing material.
소성 온도를 저감시키기 위한 플라이애쉬를 더 포함하며, 상기 플라이애쉬는 상기 폐점토벽돌 100중량부에 대하여 0.1∼5중량부 함유되는 것을 특징으로 하는 친환경적인 세라믹 흡음재.
The method according to claim 1, wherein the ceramic sound absorbing material,
Further comprising a fly ash for reducing the firing temperature, the fly ash is an environmentally friendly ceramic sound absorbing material, characterized in that containing 0.1 to 5 parts by weight based on 100 parts by weight of the waste clay brick.
경량화시키고 흡음 성능을 향상시키기 위하여 바텀애쉬를 더 포함하며, 상기 바텀애쉬는 상기 폐점토벽돌 100중량부에 대하여 0.1∼20중량부 함유되는 것을 특징으로 하는 친환경적인 세라믹 흡음재.
The method according to claim 1, wherein the ceramic sound absorbing material,
Eco-friendly ceramic sound absorbing material, characterized in that it further comprises a bottom ash to reduce the weight and improve the sound absorption performance, the bottom ash is contained 0.1 to 20 parts by weight based on 100 parts by weight of the closed clay brick.
기공을 형성하여 기공율 및 흡음 성능을 향상시키기 위하여 흑연을 더 포함하며, 상기 흑연은 상기 폐점토벽돌 100중량부에 대하여 0.1∼5중량부 함유되는 것을 특징으로 하는 친환경적인 세라믹 흡음재.
The method according to claim 1, wherein the ceramic sound absorbing material,
Eco-friendly ceramic sound absorbing material, characterized in that it further comprises graphite to form pores to improve porosity and sound absorption performance, the graphite is contained 0.1 to 5 parts by weight based on 100 parts by weight of the closed clay brick.
원적외선 방사율을 향상시키기 위하여 질석을 더 포함하며, 상기 질석은 상기 폐점토벽돌 100중량부에 대하여 0.1∼5중량부 함유되는 것을 특징으로 하는 친환경적인 세라믹 흡음재.
The method according to claim 1, wherein the ceramic sound absorbing material,
Eco-friendly ceramic sound-absorbing material further comprises vermiculite in order to improve the far-infrared emissivity, wherein the vermiculite is contained 0.1 to 5 parts by weight based on 100 parts by weight of the waste clay brick.
상기 폐점토벽돌 분말 100중량부에 대하여 점토 5∼20중량부, 프릿 5∼20중량부 및 카르복시메틸셀룰로오스 1∼8중량부를 건식 혼합하는 단계;
세라믹 흡음재 100중량부에 대하여 상기 폐점토벽돌 분말과 상기 폐점토벽돌 분말 100중량부에 대하여 수분 10∼20중량부를 믹서기에 첨가하고, 건식 혼합된 원료를 혼합하여 건식 혼합된 원료가 폐점토벽돌 분말의 표면에 코팅되게 하는 단계;
믹서기에서 혼합된 결과물을 압축프레스를 이용하여 성형하는 단계;
성형물을 60∼100℃의 온도에서 1∼24시간 동안 건조하는 단계; 및
건조물을 900∼1200℃의 온도에서 30분∼12시간 동안 소성하여 세라믹 흡음재를 얻는 단계를 포함하는 친환경적인 세라믹 흡음재의 제조방법.
Pulverizing the waste clay brick to sift the waste clay brick to a predetermined size to prepare the waste clay brick powder having a uniform particle size;
Dry mixing 5 to 20 parts by weight of clay, 5 to 20 parts by weight of frit and 1 to 8 parts by weight of carboxymethylcellulose, based on 100 parts by weight of the waste clay brick powder;
10 to 20 parts by weight of water is added to a blender with respect to 100 parts by weight of the ceramic sound absorbing material and 100 parts by weight of the waste clay brick powder, and dry mixed raw materials are mixed to dry clay raw material. Allowing the surface of the coating to be coated;
Shaping the mixed result in a blender using a compression press;
Drying the molded product at a temperature of 60 to 100 ° C. for 1 to 24 hours; And
Baking the dried product for 30 minutes to 12 hours at a temperature of 900 ~ 1200 ℃ to obtain a ceramic sound absorbing material.
The method of claim 8, wherein the waste clay brick is pulverized so that the waste clay brick has a particle size of 0.3 to 5 mm.
The method according to claim 8, wherein the fired ceramic sound absorbing material is molded to have a thickness of 10 to 100mm, and the ceramic sound absorbing material is formed to be spaced apart from the wall by 10 to 50mm so that an air layer is formed between the ceramic sound absorbing material and the wall. Environmentally friendly ceramic sound absorbing material manufacturing method.
소성 온도를 저감시키기 위하여 플라이애쉬를 상기 폐점토벽돌 분말 100중량부에 대하여 0.1∼5중량부 첨가하여 함께 혼합하는 것을 특징으로 하는 친환경적인 세라믹 흡음재의 제조방법.
The method of claim 8, wherein in the dry mixing step,
A method for producing an environmentally friendly ceramic sound absorbing material, characterized in that the fly ash is added to 0.1 to 5 parts by weight based on 100 parts by weight of the waste clay brick to reduce the firing temperature.
상기 세라믹 흡음재를 경량화시키고 흡음 성능을 향상시키기 위하여 바텀애쉬를 상기 폐점토벽돌 분말 100중량부에 대하여 0.1∼20중량부 첨가하여 함께 혼합하는 것을 특징으로 하는 친환경적인 세라믹 흡음재의 제조방법.
The method of claim 8, wherein in the dry mixing step,
A method for producing an environmentally friendly ceramic sound absorbing material, characterized in that the bottom ash is added 0.1 to 20 parts by weight based on 100 parts by weight of the waste clay brick powder in order to reduce the weight of the ceramic sound absorbing material and improve sound absorption performance.
기공을 형성하여 기공율 및 흡음 성능을 향상시키기 위하여 흑연을 상기 폐점토벽돌 분말 100중량부에 대하여 0.1∼5중량부 첨가하여 함께 혼합하는 것을 특징으로 하는 친환경적인 세라믹 흡음재의 제조방법.
The method of claim 8, wherein in the dry mixing step,
Method for producing an environmentally friendly ceramic sound absorbing material, characterized in that the mixture is added by mixing 0.1 to 5 parts by weight with respect to 100 parts by weight of the waste clay brick powder to form pores to improve the porosity and sound absorption performance.
원적외선 방사율을 향상시키기 위하여 질석을 상기 폐점토벽돌 분말 100중량부에 대하여 0.1∼5중량부 첨가하여 함께 혼합하는 것을 특징으로 하는 친환경적인 세라믹 흡음재의 제조방법.The method of claim 8, wherein in the dry mixing step,
In order to improve far-infrared emissivity, vermiculite is added in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the waste clay brick powder and mixed together.
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| CN116120012A (en) * | 2023-02-06 | 2023-05-16 | 东北林业大学 | Regenerated waste brick high-temperature modified sound absorption mortar and preparation method thereof |
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| KR100225407B1 (en) | 1997-04-26 | 1999-10-15 | 차두삼 | Continuous porous ceramic sound-absorbing materials and preparation thereof |
| KR100241593B1 (en) * | 1998-10-28 | 2000-02-01 | 박대인 | Manufacture method of ceramic material soundproofing material |
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| CN116120012A (en) * | 2023-02-06 | 2023-05-16 | 东北林业大学 | Regenerated waste brick high-temperature modified sound absorption mortar and preparation method thereof |
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