JPS6360149A - Manufacture of ceramic sound absorber - Google Patents
Manufacture of ceramic sound absorberInfo
- Publication number
- JPS6360149A JPS6360149A JP61200053A JP20005386A JPS6360149A JP S6360149 A JPS6360149 A JP S6360149A JP 61200053 A JP61200053 A JP 61200053A JP 20005386 A JP20005386 A JP 20005386A JP S6360149 A JPS6360149 A JP S6360149A
- Authority
- JP
- Japan
- Prior art keywords
- particles
- ceramic
- melting point
- sound absorber
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000919 ceramic Substances 0.000 title claims description 20
- 239000006096 absorbing agent Substances 0.000 title claims description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000002245 particle Substances 0.000 claims description 49
- 238000002844 melting Methods 0.000 claims description 24
- 230000008018 melting Effects 0.000 claims description 15
- 239000011521 glass Substances 0.000 claims description 13
- 239000011214 refractory ceramic Substances 0.000 claims description 10
- 239000011358 absorbing material Substances 0.000 description 10
- 238000005452 bending Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000010304 firing Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- -1 chamotte Chemical compound 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 229910052571 earthenware Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はサイレンサーの吸音体に適用されるセラミック
吸音体の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a ceramic sound absorber applied to a sound absorber of a silencer.
従来からサイレンサー用の吸音材としては吸音特性に優
れたガラスウール等の繊維状吸音材が広く使用されてい
る。Conventionally, fibrous sound absorbing materials such as glass wool, which have excellent sound absorbing properties, have been widely used as sound absorbing materials for silencers.
しかしながら繊維状吸音材は水蒸気あるいは降雨などに
より一旦吸水すると完全除水が困難と々シ、吸水によっ
て吸音率が著しく低下する欠点がある。また繊維状吸音
材は高温の高速気流にさらされる環境下では吸音材の飛
散が問題となる。However, once the fibrous sound absorbing material absorbs water due to water vapor or rain, it is difficult to completely remove the water, and the sound absorption coefficient of the fibrous sound absorbing material decreases significantly due to water absorption. Furthermore, in environments where fibrous sound absorbing materials are exposed to high-temperature, high-velocity air currents, scattering of the sound absorbing materials becomes a problem.
以上のように工場等より排出される蒸気、高温度の排ガ
スを排出する排気管から出る騒音を吸音するサイレンサ
ー用の吸音材として繊維状吸音体は多くの欠点がある。As described above, fibrous sound absorbers have many drawbacks as sound absorbing materials for silencers that absorb noise from exhaust pipes that discharge steam and high-temperature exhaust gas from factories.
これらの欠点を改善するためにセラミック吸音材が用い
られるようになりつつある。Ceramic sound absorbing materials are increasingly being used to improve these drawbacks.
本発明は、上記欠点を改善できるセラミック吸音材を、
安価に製造しうる方法全提供しようとするものである。The present invention provides a ceramic sound absorbing material that can improve the above drawbacks.
The aim is to provide all methods that can be manufactured at low cost.
本発明者らは、セラミック吸音体を製造するにあたり使
用原料である耐火セラミック粒子に低融点ガラス質粒子
を添加し、耐火セラミック粒子の粒径及び低融点ガラス
質粒子の添加ｉｔ特定することにより吸音特性【優れ、
かつ、高強度で耐蒸気性に優れたセラミック吸音体が製
造できることを確認し、本発明を完成するに至った。The present inventors added low-melting point vitreous particles to refractory ceramic particles, which are the raw materials used in producing a ceramic sound absorber, and determined the particle size of the refractory ceramic particles and the addition of the low-melting point vitreous particles. Characteristics [Excellent,
Furthermore, it was confirmed that a ceramic sound absorber with high strength and excellent steam resistance could be manufactured, and the present invention was completed.
すなわち、本発明は粒径が０．５ｗ＊以上２頗以下の耐
火セラミック粒子と、セラミック粒子よりも融点の低い
低融点ガラス質粒子を全体の７〜２０重量憾重量るよう
に添加し、混合、プレス後、焼成することを特徴とする
高強度、耐蒸気性セラミック吸音体の製造方法である。That is, in the present invention, refractory ceramic particles having a particle size of 0.5w* or more and 2wt or less and low-melting glass particles having a melting point lower than that of the ceramic particles are added and mixed in an amount that weighs 7 to 20% of the total weight. This is a method for manufacturing a high-strength, steam-resistant ceramic sound absorber, which is characterized by pressing and then firing.
そして、耐火性セラミック粒子の粒径ば１瓢以上２ｕ以
下を好ましい実施態様とするものであり、焼成温度とし
ては、低融点ガラス質粒子の融点の近傍、好ましくは融
点より５０〜１５０℃高い温度を好ましい実施態様とす
るものである。In a preferred embodiment, the refractory ceramic particles have a particle size of 1 μm or more and 2 μm or less, and the firing temperature is near the melting point of the low-melting glass particles, preferably 50 to 150° C. higher than the melting point. is a preferred embodiment.
本発明方法により、低コストで生産性に優れかつ耐蒸気
性を有するセラミック吸音体を製造することが可能とな
る。By the method of the present invention, it is possible to manufacture a ceramic sound absorber having excellent productivity and steam resistance at low cost.
以下本発明の一実施例を説明する。 An embodiment of the present invention will be described below.
耐火セラミック粒子としては珪石、シャモット、ムライ
ト等の粒子の他に磁器、陶器あるいＦｉ耐火物等のセラ
ミックス物質を粉砕して得たものを使用する。高温雰囲
気下での使用を考えるとまた低融点ガラス質粒子の入手
の容易性を考えると耐火度で１０００℃以上の耐火セラ
ミック粒子の使用が好ましい。又、一般的に低融点ガラ
スとしては、Ｎａｎｏ ／ ＭｇＯ： ５０〜５１％、
ＭｇＯ： ３５〜５４％、ＣａＯ；ＩＩＬ５〜α６係、
ムｂｏｘ ： １五２〜１五３俤、８１０鵞 ニアｚ
８〜７７、９４の組成のものが使用される。As the refractory ceramic particles, in addition to particles of silica, chamotte, mullite, etc., particles obtained by crushing ceramic materials such as porcelain, earthenware, and Fi refractories are used. Considering the use in a high-temperature atmosphere and the ease of obtaining low-melting glass particles, it is preferable to use refractory ceramic particles with a refractory degree of 1000° C. or higher. In addition, generally low melting point glasses include Nano/MgO: 50-51%,
MgO: 35-54%, CaO; IIL5-α6,
Mu box: 152 to 153 yen, 810 yen near z
Those having compositions 8 to 77 and 94 are used.
−ｎとしてシャモット粒子を用いた場合の列で本発明の
詳細な説明する。また低融点ガラス質粒子としては上記
組成の融点が１３００℃の釉薬を用いた。The present invention will be described in detail in the column in which chamotte particles are used as -n. Further, as the low melting point glass particles, a glaze having the above composition and a melting point of 1300° C. was used.
シャモット粒子の粒径がｒ：Ｌ５＋ｘ以下、α５ツ〜ｉ
、 Ｏｔｍ、ｉ、 Ｏ〜Ｚ Ｏｍｇ 、 １．０〜五
〇６の４種類を用い、低融点ガラス質である上記の釉薬
粒子を全体の１０重重量上なるように添加し、１３００
℃で焼成して得られたセラミック吸音体の曲げ強さ及び
３００℃の飽和水蒸気圧下で１００時間オートクレーブ
処理？した後の曲げ強さを第１図及び第２図に示す。The particle size of chamotte particles is r: L5 + x or less, α5 ~ i
, Otm, i, O~Z Omg, 1.0~506 were used, and the above-mentioned glaze particles, which are low melting point glass, were added in an amount of 10 weight more than the total, and 1300
Bending strength of ceramic sound absorber obtained by firing at ℃ and autoclave treatment for 100 hours under saturated water vapor pressure at 300℃? The bending strength after bending is shown in Figures 1 and 2.
この結果より明らかなように粒径が０．５〜２醪、好ま
しくけ１〜２ｍの粒径の耐火セラミック粒子を用いると
耐蒸気性に優れた高強度セラミック吸音体が得られるこ
とがわかる。粒径の細かい粒子では粒子の表面積が多く
なり、均一に粒子表面がガラス質粒子で被われないため
強度が低下し、粒径の粗い粒子では気孔質が高くなり強
度が低下するものである。As is clear from the results, a high-strength ceramic sound absorber with excellent vapor resistance can be obtained by using refractory ceramic particles having a particle size of 0.5 to 2 m, preferably 1 to 2 m. Particles with a fine particle size have a large surface area, and the particle surface is not evenly covered with glassy particles, resulting in a decrease in strength, while particles with a coarse particle size have high porosity, resulting in a decrease in strength.
粒径が１〜２ｆｉの７ヤモツト粒子を用いて、低融点ガ
ラス質粒子の添加量を変えた場合のセラミック吸音体の
曲げ強さ及び３００℃、飽和水蒸気圧下で１００時間オ
ートクレーブ処理した後の曲げ強さを第３図及び第４図
に示す。Bending strength of ceramic sound absorbers using 7Yamoto particles with a particle size of 1 to 2fi and varying the amount of low-melting glass particles added, and bending after autoclaving at 300°C and saturated steam pressure for 100 hours. The strength is shown in Figures 3 and 4.
低融点ガラス質粒子の添加片を７傷以上とすると曲げ強
さは一定となるが、オートクレーブ後の曲げ強さは添加
量が７％以下、２０％以上では低下する。低融点ガラス
質粒子が少ないと耐火セラミック粒子の表面が均質に被
われず、耐火セラミック粒子が水蒸気くより劣化し低融
点ガラス質粒子が過剰にあるとガラス質が水蒸気で劣化
するためである。If the piece to which low melting point glassy particles are added has 7 or more scratches, the bending strength will be constant, but the bending strength after autoclaving will decrease if the addition amount is 7% or less and 20% or more. This is because if there are too few low melting point vitreous particles, the surface of the refractory ceramic particles will not be uniformly covered, and the refractory ceramic particles will deteriorate due to water vapor, and if there are too many low melting point vitreous particles, the vitreous quality will deteriorate due to water vapor.
粒径が１〜２略のシャモット粒子を用いて低融点ガラス
質粒子を１０重［１として焼成温度を変えた場合のセラ
ミック吸音体の曲げ強さ及び３００に：、飽和水蒸気圧
下で１００時間オートクレーブ処理した後の曲げ強さを
第５図及び第６図に示す。The bending strength of a ceramic sound absorber when changing the firing temperature with 10 layers of low-melting glass particles using chamotte particles with a particle size of 1 to 2. The bending strength after treatment is shown in FIGS. 5 and 6.
図より明らかなように低融点ガラスの融点１３００℃の
近傍での焼成が有効であり、特に１３００℃〜１３５０
℃の範囲が好ましい。As is clear from the figure, firing near the melting point of low melting point glass, 1300°C, is effective, especially at temperatures between 1300°C and 1350°C.
A range of 0.degree. C. is preferred.
こうして得られたセラミック吸音板の垂直入射吸音率、
測定結果を第７図に示すが、ピーク吸音率が９５僑以上
の優れたセラミック吸音材が得られた。なお第７図の横
軸のｒ １４００Ｔ Ｆｅｑ Ｊとけ晃オクターブバン
ド中心周波数のことである。The normal incidence sound absorption coefficient of the ceramic sound absorption plate obtained in this way,
The measurement results are shown in FIG. 7, and an excellent ceramic sound absorbing material with a peak sound absorption coefficient of 95 or more was obtained. Note that the horizontal axis in FIG. 7 refers to the center frequency of the octave band.
以上詳述した如く本発明によれば耐蒸気性に優れたセラ
ミック吸音体？低コストで製造することができる。As described in detail above, according to the present invention, a ceramic sound absorber with excellent steam resistance? Can be manufactured at low cost.
第１図、第２図はセラミック粒子の粒径の影響を示す図
、第３図、第４図は低融点ガラス質粒子の添加量の影響
を示す図、第５図、第６図は焼成温度の影響を示す図、
第７図は垂直入射吸音率の測定結果を示す図である。
復代理人 内 １） 明
復代理人 萩 原 亮 −
復代理人 安 西 篤 夫
曲１丁５ｆさ （Ｋｇ ｆ／ｃｍ２）
血げ引し２ （Ｋｑｆ／ｃｙｎり
第１図
第３図
低融点ガラス貿拉子’ｊ’Ｊ側量（％）馬２図
泊４図
低融点ガラス質粒子摩加マ（勾Figures 1 and 2 are graphs showing the influence of the particle size of ceramic particles, Figures 3 and 4 are graphs showing the influence of the amount of low-melting glass particles added, and Figures 5 and 6 are graphs showing the influence of the particle size of ceramic particles. Diagram showing the effect of temperature,
FIG. 7 is a diagram showing the measurement results of normal incidence sound absorption coefficient. Sub-agents 1) Meifuku agent Ryo Hagiwara - Sub-agent Atsushi Anzai Fukyoku 1cho 5fsa (Kg f/cm2) Blood puller 2 (Kqf/cyn Figure 1 Figure 3 Low melting point Glass trade 'j' J side amount (%) Ma 2 Figure 4 Figure Low melting point glass particle
Claims (1)
子と、セラミック粒子よりも融点の低い低融点ガラス質
粒子を全体の７〜２０重量％になるように添加し、混合
、プレス後、焼成することを特徴とする高強度、耐蒸気
性セラミック吸音体の製造方法。Refractory ceramic particles with a particle size of 0.5 mm or more and 2 mm or less and low-melting glass particles with a lower melting point than the ceramic particles are added in an amount of 7 to 20% by weight of the total, mixed, pressed, and fired. A method for producing a high-strength, steam-resistant ceramic sound absorber characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61200053A JPH068202B2 (en) | 1986-08-28 | 1986-08-28 | Ceramic sound absorbing body manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61200053A JPH068202B2 (en) | 1986-08-28 | 1986-08-28 | Ceramic sound absorbing body manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6360149A true JPS6360149A (en) | 1988-03-16 |
| JPH068202B2 JPH068202B2 (en) | 1994-02-02 |
Family
ID=16418045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61200053A Expired - Lifetime JPH068202B2 (en) | 1986-08-28 | 1986-08-28 | Ceramic sound absorbing body manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH068202B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS531206A (en) * | 1976-06-26 | 1978-01-09 | Ngk Insulators Ltd | Heatt and shockkresisting ceramic sound absorbers |
| JPS5585709A (en) * | 1978-12-22 | 1980-06-28 | Ngk Insulators Ltd | Sound isolating wall |
| US4481124A (en) * | 1983-01-07 | 1984-11-06 | Ngk Insulators, Ltd. | Thermal shock resistant porous sound absorbing body |
-
1986
- 1986-08-28 JP JP61200053A patent/JPH068202B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS531206A (en) * | 1976-06-26 | 1978-01-09 | Ngk Insulators Ltd | Heatt and shockkresisting ceramic sound absorbers |
| JPS5585709A (en) * | 1978-12-22 | 1980-06-28 | Ngk Insulators Ltd | Sound isolating wall |
| US4481124A (en) * | 1983-01-07 | 1984-11-06 | Ngk Insulators, Ltd. | Thermal shock resistant porous sound absorbing body |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH068202B2 (en) | 1994-02-02 |
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