JPS6140550B2 - - Google Patents
Info
- Publication number
- JPS6140550B2 JPS6140550B2 JP57033575A JP3357582A JPS6140550B2 JP S6140550 B2 JPS6140550 B2 JP S6140550B2 JP 57033575 A JP57033575 A JP 57033575A JP 3357582 A JP3357582 A JP 3357582A JP S6140550 B2 JPS6140550 B2 JP S6140550B2
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- porous ceramic
- reinforcing wall
- ceramic body
- skeleton
- 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.)
- Expired
Links
- 239000000919 ceramic Substances 0.000 claims description 46
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 description 9
- 230000035939 shock Effects 0.000 description 8
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 7
- 239000002002 slurry Substances 0.000 description 7
- 229910052878 cordierite Inorganic materials 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 229910010293 ceramic material Inorganic materials 0.000 description 4
- 238000010304 firing Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
- Laminated Bodies (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
【発明の詳細な説明】
本発明はデイーゼルエンジンから排出されるパ
テイキユレート（カーボン系微粒子）の補集用担
体、高温濾材、触媒担体、熱交換器などに用いら
れる多孔セラミツク構造体に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a porous ceramic structure used for a carrier for collecting particulate (carbon-based fine particles) discharged from a diesel engine, a high-temperature filter medium, a catalyst carrier, a heat exchanger, and the like.
従来この種のものとしては、三次元網状構造の
セラミツク骨格により形成された内部連通空間を
もつ多孔セラミツク構造体が知られている。 As a conventional example of this type, a porous ceramic structure having an internal communication space formed by a ceramic skeleton having a three-dimensional network structure is known.
かかる従来の構造体はその構造から強度的に弱
く、このためその外周をセラミツク製補強壁で補
強する必要があり、この点の発明、考案も種々提
案されているようである。 Such a conventional structure has a weak strength because of its structure, and therefore, it is necessary to reinforce its outer periphery with a ceramic reinforcing wall, and various inventions and ideas have been proposed in this regard.
本発明は上記のごとき構造の多孔セラミツク体
の外周を、新規構造のセラミツク補強壁で補強す
ることにより、多孔セラミツク構造体の強度を向
上し、かつ熱衝撃強度も向上しようとするもので
ある。 The present invention aims to improve the strength and thermal shock strength of the porous ceramic structure by reinforcing the outer periphery of the porous ceramic structure as described above with a ceramic reinforcing wall of a new structure.
以下本発明を具体的実施例により詳細に説明す
る。第１図Ａ，Ｂにおいて、１は円柱形状の多孔
セラミツク体であり、排気ガスのパテイキユレー
ト捕集用として使用する場合にはこの多孔セラミ
ツク体１が捕集部となる。この多孔セラミツク体
１は複雑に入り組んだ三次元網状構造のセラミツ
ク骨格１ａをもつとともに、それらの間に形成さ
れた内部連通空間１ｂをもつている。 The present invention will be explained in detail below using specific examples. In FIGS. 1A and 1B, reference numeral 1 denotes a cylindrical porous ceramic body, and when used for collecting particulate matter of exhaust gas, this porous ceramic body 1 becomes a collection part. This porous ceramic body 1 has a ceramic skeleton 1a having a complicated three-dimensional network structure, and an internal communication space 1b formed between them.
２は補強壁である。この補強壁２は上記多孔セ
ラミツク体１の外周囲全域に亘つて設けてあり、
その多孔セラミツク体の外周囲のセラミツク骨格
１ａを利用した構造である。即ち、このセラミツ
ク骨格１ａの内部連通空間１ｂの一部が、内部に
微小空隙３をもつたセラミツク体４で充填された
構造となつている。この空隙３は10〜2000μ程度
の大きさをもつている。なお、第２図は第１図Ｂ
のＸ−Ｘ断面を示している。 2 is a reinforcing wall. This reinforcing wall 2 is provided over the entire outer periphery of the porous ceramic body 1,
This structure utilizes the ceramic skeleton 1a surrounding the porous ceramic body. That is, a part of the internal communication space 1b of the ceramic skeleton 1a is filled with a ceramic body 4 having micro voids 3 therein. This void 3 has a size of about 10 to 2000μ. In addition, Figure 2 is Figure 1B.
XX cross section is shown.
次に上記の多孔セラミツク構造体の一般的な製
造方法を具体的な例を挙げて示す。上記多孔セラ
ミツク体１の原料１の原料として、コーデイエラ
イト原料粉末100部（重量部；以下同じ）、水100
〜150部、有機結合剤（例えば、メチルセルロー
ル、ポリビニルアルコール）３〜７部を混練して
コーデイエライト泥漿を調整する。この泥漿に、
単位長さ当たりのセル数８〜13個／inchの円柱状
の形状をもつ三次元網状構造の有機物（例えば、
ポリウレタンフオーム）を浸漬し、浸漬後有機物
内に残留しているコーデイエライト泥漿の余剰分
を遠心分離、圧縮エアなどで除去し、100〜120℃
で２〜３時間乾燥する。上記有機物の骨格表面が
完全に原料微粉末で覆われるまで上記の浸漬−乾
燥工程を繰返す。 Next, a general method for manufacturing the above-mentioned porous ceramic structure will be described by giving a specific example. As raw materials for raw material 1 of the porous ceramic body 1, 100 parts of cordierite raw material powder (parts by weight; the same applies hereinafter), 100 parts of water
~150 parts of cordierite slurry is prepared by kneading 3 to 7 parts of an organic binder (eg, methylcellulose, polyvinyl alcohol). In this mud,
Organic matter with a three-dimensional network structure having a cylindrical shape with 8 to 13 cells/inch per unit length (e.g.
Polyurethane foam) is soaked, and after soaking, excess cordierite slurry remaining in the organic matter is removed by centrifugation, compressed air, etc., and heated to 100 to 120℃.
Dry for 2 to 3 hours. The above immersion-drying process is repeated until the skeletal surface of the organic substance is completely covered with the raw material fine powder.
その後、1300〜1470℃で５〜10時間焼成して第
１図Ａ，Ｂに示す多孔セラミツク体１を得る。 Thereafter, the porous ceramic body 1 shown in FIGS. 1A and 1B is obtained by firing at 1300 DEG to 1470 DEG C. for 5 to 10 hours.
一方、補強壁の原料としてコーデイライト原料
粉末100部、水40〜60部、上記と同様の有機結合
剤３〜７部、先のコーデイエライト原料より低温
度で燃焼飛散する可燃性微粒子（例えばカーボン
粒子）10〜20部を混練し、粘度の高い泥漿を調整
する。 On the other hand, as raw materials for the reinforcing wall, 100 parts of cordierite raw material powder, 40 to 60 parts of water, 3 to 7 parts of the same organic binder as above, and combustible fine particles (e.g. Mix 10 to 20 parts of carbon particles to prepare a highly viscous slurry.
この泥漿を上記多孔セラミツク体１の外周囲の
骨格１ａの表面に例えばヘラなどを用いて塗り込
み、その骨格１ａの間の内部連通空間１ｂを埋め
込む。 This slurry is applied to the surface of the skeletons 1a around the outer periphery of the porous ceramic body 1 using, for example, a spatula, thereby filling the internal communication spaces 1b between the skeletons 1a.
この後に1300〜1470℃で５〜10時間焼成する。 After this, it is fired at 1300-1470°C for 5-10 hours.
これにより、上記泥漿中のカーボン粒子は焼失
し、その焼失跡が微小空隙３となつたセラミツク
体４が多孔セラミツク体１の外周囲に設けられ、
補強壁２となる。 As a result, the carbon particles in the slurry are burnt out, and a ceramic body 4 in which the burnt remains become micro voids 3 is provided around the outer periphery of the porous ceramic body 1.
This becomes the reinforcement wall 2.
上記構成によれば、多孔セラミツク体１は本構
造体がデイーゼルエンジンから排出されるパテイ
キユレートの捕集材として用いられる場合には、
そのパテイキユレートを捕集する。一方、補強壁
２は本構造体の機械的強度を向上させるとともに
多孔セラミツク体１の内部に流入したガスの側面
部からの漏れを防止する役割を果たしている。 According to the above structure, when the porous ceramic body 1 is used as a collection material for particulate matter discharged from a diesel engine,
Collect the particulate matter. On the other hand, the reinforcing wall 2 serves to improve the mechanical strength of the structure and also to prevent gas that has flowed into the porous ceramic body 1 from leaking from the side surfaces.
ところで、補強壁２の内部構造が三次元網状を
呈するセラミツク骨格１ａの内部連通空間１ｂを
セラミツク質４に置き換え、このセラミツク質４
の内部に微小空隙３を設けた構造になつている。 By the way, the internal communication space 1b of the ceramic skeleton 1a in which the internal structure of the reinforcing wall 2 has a three-dimensional network shape is replaced with a ceramic material 4.
It has a structure in which a micro gap 3 is provided inside.
かかる構造により、有機物骨格の表面にセラミ
ツク原料を付着させ、焼成した、有機物骨格と類
似の構造を有する補強壁をもつもの（以下比較例
という）に比較して、外周部から均一な荷重を加
えてその抵抗力を測定するアイソスタテツク強度
において、比較例の強度10〜15Kg／cm2に対して本
発明では強度20〜30Kg／cm2と優れている。これ
は、比較例の補強壁のそれぞれのセラミツク骨格
の内部に必ず芯材となつた有機物骨格跡の空洞が
残り、あたかも中空パイプのようであり、補強壁
の内、セラミツク質が占める割合が５体積％前後
と非常にわずかであるのに対して、本発明の構造
体の補強壁２は三次元網状のセラミツク骨格１ａ
の間に形成される空間１ｂ内に空隙（ポア）３を
もつセラミツク体４が充填された構造であつて、
補強壁２の内に占めるセラミツク質は略90体積％
と多く、このため本発明における補強壁２の強度
が向上し、ひいては構造体全体の強度が向上す
る。 With this structure, a uniform load can be applied from the outer periphery compared to a reinforced wall with a similar structure to the organic skeleton (hereinafter referred to as a comparative example), which is made by attaching a ceramic raw material to the surface of the organic skeleton and firing it. In terms of isostatic strength, which measures the resistance force, the strength of the present invention is 20 to 30 Kg/cm 2 , which is superior to that of the comparative example, which is 10 to 15 Kg/cm 2 . This is because inside each ceramic skeleton of the reinforcing wall in the comparative example, a cavity remains as a trace of the organic skeleton that became the core material, making it look like a hollow pipe, and the proportion of the ceramic material in the reinforcing wall is 5. In contrast, the reinforcing wall 2 of the structure of the present invention has a three-dimensional network ceramic skeleton 1a.
A structure in which a ceramic body 4 having voids (pores) 3 is filled in a space 1b formed between the
The ceramic material in the reinforcing wall 2 accounts for approximately 90% by volume.
Therefore, the strength of the reinforcing wall 2 in the present invention is improved, and the strength of the entire structure is improved.
また一方、耐熱衝撃性においても、この特性が
主に空隙率と強度により決定され、空隙率が高い
と同時に強度の優れたものが耐熱衝撃性に優れる
ことが知られている。比較例では空隙率の点では
非常に優れているが、補強壁のそれぞれの骨格の
強度が弱いため、熱衝撃試験時に、600〜650℃で
その補強壁に大きなクラツクが発生するのに対し
て、本発明の構造体では、見かけの空隙率の点で
は低下の傾向にあるが、強度の向上により耐熱衝
撃温度700〜750℃と比較例を上まわつている。ま
た本実施例に示したようなコーデイエライト製構
造体においては、公知の事実となつている原料の
MgO（マグネシア）供給成分の粒径が生成した
コーデイエライトセラミツク質自体の多孔質化に
大きく影響を与えることを利用すると、セラミツ
ク質自体の多孔質化が可能となり、耐熱衝に対す
る抗力がより高まる。更に、補強壁２の原料のセ
ラミツク泥漿に添加した可燃性微粒子の量が任意
に選択できるため、構造体の用途に合わせた強度
と耐熱衝撃性の両立が可能となる長所もある。 On the other hand, with regard to thermal shock resistance, it is known that this property is mainly determined by porosity and strength, and materials with high porosity and excellent strength have excellent thermal shock resistance. Although the comparative example is very good in terms of porosity, the strength of each skeleton of the reinforced wall is weak, so large cracks occur in the reinforced wall at 600 to 650℃ during the thermal shock test. In the structure of the present invention, although the apparent porosity tends to decrease, due to the improvement in strength, the thermal shock resistance temperature is 700 to 750°C, which is higher than that of the comparative example. In addition, in the cordierite structure shown in this example, the raw material is
By utilizing the fact that the particle size of the MgO (magnesia) supply component has a large effect on the porosity of the produced cordierite ceramic itself, it is possible to make the ceramic itself porous, further increasing its resistance to heat shock. . Furthermore, since the amount of combustible fine particles added to the ceramic slurry that is the raw material for the reinforcing wall 2 can be arbitrarily selected, there is also the advantage that both strength and thermal shock resistance can be achieved in accordance with the purpose of the structure.
第３図Ａ，Ｂは変形例を示す。これはセラミツ
ク焼成温度より低温で燃焼飛散する可燃物微粉末
を添加した泥漿を用いて、ドクターブレード法、
押し出し法、ローラ法、乾式プレス法の内から適
宜に選択した製法によりグリーンシートを作製
し、これを第２図Ａの多孔セラミツク体１に巻き
付け溶剤により接着した後、焼成を行なうことに
より、第２図Ｂに示すようにセラミツク骨格１ａ
の外周部に、４の可燃性微粒子の飛散跡の空隙３
を有するセラミツク体４で補強壁２を構成しても
よい。 FIGS. 3A and 3B show modified examples. This method uses a slurry containing fine combustible powder that burns and scatters at a temperature lower than the firing temperature of ceramics, using the doctor blade method.
A green sheet is produced by a manufacturing method appropriately selected from among extrusion method, roller method, and dry press method, and this is wrapped around the porous ceramic body 1 shown in FIG. 2A and bonded with a solvent, followed by firing. As shown in Figure 2B, the ceramic skeleton 1a
On the outer periphery of 4, there is a gap 3 where the combustible particles are scattered.
The reinforcing wall 2 may be constructed of a ceramic body 4 having the following properties.
なお、本発明の実施例において、可燃性微粒子
としてカーボン粒子を用いたが、他の無機物、あ
るいは有機物（例えば木片）でもよく、要は燃焼
により飛散するものであればよい。また、多孔セ
ラミツク構造体の材質としてもコーデイエライト
系に限らず、種々のセラミツク材料を用いること
ができる。 In the examples of the present invention, carbon particles were used as the combustible particles, but other inorganic or organic substances (for example, wood chips) may be used, as long as they are dispersed by combustion. Further, the material of the porous ceramic structure is not limited to cordierite, and various ceramic materials can be used.
以上要するに、本発明においては、多孔セラミ
ツク構造体の機械的強度と耐熱衝撃強度とを向上
できるという効果がある。 In summary, the present invention has the effect of improving the mechanical strength and thermal shock resistance of a porous ceramic structure.
第１図Ａ，Ｂは本発明の一実施例を示す斜視図
および断面図、第２図は第１図ＢのＸ−Ｘ断面
図、第３図Ａ，Ｂは変形例を示す斜視図および断
面図である。
１……多孔セラミツク体、１ａ……骨格、１ｂ
……空間、２……補強壁、３……空隙、４……セ
ラミツク体。
1A and B are a perspective view and a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line XX in FIG. FIG. 1... Porous ceramic body, 1a... Skeleton, 1b
...space, 2...reinforced wall, 3...void, 4...ceramic body.
Claims (1)
された内部連通空間をもつ多孔セラミツク体の外
周に補強壁を設けたセラミツク構造体であつて、
三次元網状構造のセラミツク骨格間の空間に微小
空隙をもつたセラミツク体が充填された構造によ
り前記補強壁を構成した多孔セラミツク構造体。1. A ceramic structure in which a reinforcing wall is provided around the outer periphery of a porous ceramic body having an internal communication space formed by a ceramic skeleton with a three-dimensional network structure,
A porous ceramic structure in which the reinforcing wall is constituted by a structure in which spaces between ceramic skeletons of a three-dimensional network structure are filled with ceramic bodies having minute voids.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57033575A JPS58151381A (en) | 1982-03-03 | 1982-03-03 | Porous ceramic structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57033575A JPS58151381A (en) | 1982-03-03 | 1982-03-03 | Porous ceramic structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58151381A JPS58151381A (en) | 1983-09-08 |
| JPS6140550B2 true JPS6140550B2 (en) | 1986-09-10 |
Family
ID=12390325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57033575A Granted JPS58151381A (en) | 1982-03-03 | 1982-03-03 | Porous ceramic structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58151381A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144778A (en) * | 1984-08-03 | 1986-03-04 | 株式会社デンソー | Manufacture of porous ceramic body |
-
1982
- 1982-03-03 JP JP57033575A patent/JPS58151381A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58151381A (en) | 1983-09-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5281733B2 (en) | Honeycomb structure | |
| JP4937116B2 (en) | Honeycomb structure | |
| JP4267947B2 (en) | Honeycomb structure | |
| KR101066503B1 (en) | Bonding body, bonding material composition, honeycomb segment bonding body, and honeycomb structure using the same | |
| EP2944366B1 (en) | Honeycomb structure | |
| US9138674B2 (en) | Honeycomb structure | |
| US8153073B2 (en) | Honeycomb filter, exhaust gas purifying apparatus and method for manufacturing honeycomb filter | |
| JP6622134B2 (en) | Honeycomb structure and method for manufacturing honeycomb structure | |
| EP1698388A1 (en) | Method of producing honeycomb structure body | |
| EP2123617A1 (en) | Joining material composition, method for production of the joining material composition, jointed article, and method for production of the jointed article | |
| KR20080073792A (en) | Bonding material, manufacturing method thereof, and honeycomb structure using the same | |
| KR20090004935A (en) | Honeycomb Structure | |
| JP2004142978A (en) | Method for producing porous honeycomb structure, and honeycomb formed body | |
| JP2006326574A (en) | Honeycomb structure | |
| KR20070041687A (en) | Honeycomb Structure | |
| JP4434076B2 (en) | Honeycomb structure | |
| JPH08281036A (en) | Honeycomb structure and manufacture therefor | |
| JPS6140550B2 (en) | ||
| US12552723B2 (en) | Ceramic honeycomb structure and its production method | |
| JPS6161978B2 (en) | ||
| JP4616752B2 (en) | Honeycomb structure | |
| JP7022715B2 (en) | Bonding material and silicon carbide honeycomb structure | |
| JPS6323156B2 (en) | ||
| KR100841509B1 (en) | Honeycomb structure | |
| JP2020152594A (en) | Manufacturing method of honeycomb structure |