Sound absorbing material and its manufacturing method
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0362945
(2001-11-28)
|
우선권정보 |
JP-0362242 (2000-11-29) |
국제출원번호 |
PCT//JP01/10406
(2003-02-27)
|
§371/§102 date |
20030227
(20030227)
|
국제공개번호 |
WO02//44105
(2002-06-06)
|
발명자
/ 주소 |
- Oishi, Tsutomu
- Nakamura, Yoshiya
- Tanaka, Yoshizumi
- Sato, Mitsuhiko
|
출원인 / 주소 |
- Ishikawajima-Harima Heavy Industries Co., Ltd
- Ube Industries, Ltd.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
8 |
초록
▼
The porous sound-absorbing material manufactured is light and has excellent heat resistance to be applicable to the exhaust nozzle etc. of a jet engine, can effectively absorb noise as that from a jet engine, over a wide range of frequencies, is free from variations in porosity, and provides stable
The porous sound-absorbing material manufactured is light and has excellent heat resistance to be applicable to the exhaust nozzle etc. of a jet engine, can effectively absorb noise as that from a jet engine, over a wide range of frequencies, is free from variations in porosity, and provides stable performance characteristics. An essential feature thereof is the formation of a skeleton of the material, with aggregates containing voids. Thus, a porous sound-absorbing material having a skeleton of aggregates with first voids is described, wherein diameters of first voids of the aggregates are 50 μm to 100 μm, approximately, and diameters of second voids between the aggregates are 100 μm to 600 μm.
대표청구항
▼
1. A porous sound-absorbing material comprising a skeleton of aggregates with first voids and second voids, wherein diameters of first voids of the aggregates are 50 μm to 100 μm, approximately, and diameters of second voids between the aggregates are 100 μm to 600 μm.2. The porous sound-absorbing m
1. A porous sound-absorbing material comprising a skeleton of aggregates with first voids and second voids, wherein diameters of first voids of the aggregates are 50 μm to 100 μm, approximately, and diameters of second voids between the aggregates are 100 μm to 600 μm.2. The porous sound-absorbing material specified in claim 1, in which the porosity of the porous sound-absorbing material is 75% to 85%.3. The porous sound-absorbing material specified in claim 1, in which voids of said aggregates are smaller than voids between the aggregates.4. A method of manufacturing a sound-absorbing material, comprising:a first process wherein a raw material containing at least ceramic grains and a void-forming material is formed into a predetermined shape, wherein the ceramic grains comprise glass-based ceramics, said void-forming material comprises activated carbon or carbon grains, and an intermediate lid is used to place a load on the ceramic grains; and a second process wherein said void forming material is removed. 5. The porous sound-absorbing material specified in claim 2, in which voids of said aggregates are smaller than voids between the aggregates.6. A method of manufacturing a sound-absorbing material, comprising the steps of:forming a raw material containing at least ceramic grains and a void-forming material into a predetermined shape, wherein the ceramic grains comprise glass-based ceramics, and the void-forming material comprises activated carbon or carbon grains; and removing the void forming material, wherein when the void forming material is removed, first voids form in a skeleton of aggregates of the ceramic grains and second voids form between the aggregates, wherein diameters of first voids of the aggregates are 50 μm to 100 μm, approximately, and diameters of second voids between the aggregates are 100 μm to 600 μm.
이 특허에 인용된 특허 (8)
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Penumella Srinivas, Compositions for and synthesis of improved insulations.
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Kiefer Werner (Mainz DEX) Sura Maria (Ingelheim DEX), Low-density, open-pore molded inorganic body with a homogeneous pore distribution.
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Kiefer Werner (Mainz-Finthen DEX) Sura Maria (Ingelheim DEX), Method of manufacturing porous sintered inorganic bodies with large open pore volume.
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Sterzel Hans-Josef,DEX, Open-celled porous sintered products and their production.
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Pickrell Gary R. ; Butcher Kenneth R., Porous ceramic articles.
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Hsiao Ching-Sung (Hsinchu TWX) Tsai Chen-Wen (Hsinchu TWX), Porous ceramic radiation plate.
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Kobayashi ; Kazuaki ; Takaha ; Noboru ; Katsuragi ; Masao, Porous inorganic product.
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Siebers Friedrich (Mainz DEX) Kiefer Werner (Mainz DEX) Sura Maria (Ingelheim DEX), Process for the manufacture of open porous sintered bodies being prepronderantly composed of glass ceramics.
이 특허를 인용한 특허 (2)
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Jones, Michael G.; Grady, Joseph E.; Kiser, James D.; Miller, Christopher; Heidmann, James D., Acoustic liners for turbine engines.
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Jones, Michael G; Grady, Joseph E; Kiser, James D.; Miller, Christopher; Heidmann, James D., Acoustic liners for turbine engines.
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