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JP3121497B2 - Ceramic structure - Google Patents

Ceramic structure

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Publication number
JP3121497B2
JP3121497B2 JP16193894A JP16193894A JP3121497B2 JP 3121497 B2 JP3121497 B2 JP 3121497B2 JP 16193894 A JP16193894 A JP 16193894A JP 16193894 A JP16193894 A JP 16193894A JP 3121497 B2 JP3121497 B2 JP 3121497B2
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JP
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Grant
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Expired - Lifetime
Application number
JP16193894A
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Japanese (ja)
Other versions
JPH0828246A (en )
Inventor
哲史 大野
弘 岡添
政器 岩広
幸二 島戸
和也 成瀬
Original Assignee
イビデン株式会社
日産ディーゼル工業株式会社
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    • B01J27/00Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
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    • B01J27/22Carbides
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    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/02Solids
    • B01J35/04Foraminous structures, sieves, grids, honeycombs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B18/00Laminated products composed mainly of ceramics, e.g. refractory materials
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    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】この発明は、セラミック構造体に関し、特に、セラミック製のハニカム構造体、モノリス構造体、その他部材の長手方向に沿って複数の貫通孔を並列して穿孔してなるセラミック構造体の新規な構造について提案する。 BACKGROUND OF THE INVENTION This invention relates to ceramic structures, in particular, a honeycomb structure made of ceramics, a ceramic monolith structure, along the longitudinal direction of the other member formed by perforations in parallel a plurality of through-holes We propose a novel structure of the structure.

【0002】 [0002]

【従来の技術】一般に、長手方向に沿って複数の貫通孔を並列して設けてなるセラミック製ハニカム構造体などは、車両用排気ガスや工場からの排気ガスなどを浄化処理するためのフィルタとして使われている。 In general, the like along the longitudinal direction with a plurality of through-holes parallel formed by providing with ceramic honeycomb structure as a filter for purification treatment such as exhaust gas from the exhaust gas and factories for vehicles It is used. このセラミック構造体は、その端面における貫通孔の開−封状態が市松模様状(隣接する貫通孔どうしが互いに他と異なるように開−封状態となっている状態)を呈するようになっている。 The ceramic structure, open through holes in the end face thereof - is adapted to exhibit - (state in which a sealing state open to each other adjacent through-holes are different other mutually) sealing state of checkered pattern . 即ち、これらの貫通孔はいずれか一方の端面のみが目封じされており、しかも隣接する貫通孔どうしは、互いに異なる開成状態か閉止状態となっていて市松模様状の目封じとなっている。 That is, these through-holes is only the end face of one of which is sealed, yet adjacent through-holes each other has a different opening have a state or a closed state checkered pattern of the plugging. 従って、1つの貫通孔は一方の端面が開なら他端面は閉となり、これに隣接する貫通孔は逆に一方の端面は閉で他端面は開となる。 Thus, the other end face if one of the through hole is one end face opening becomes closed, one end face through hole in the opposite adjacent thereto at the other end surface in the closed is opened. そして、このセラミック構造体は、上記各貫通孔のいずれか一方の端面から被処理ガスを流入させると、他端に向かう途中において多孔質な隔壁を抜けて、隣接する貫通孔に入って他端面から処理済ガスを流出させるようになっている。 Then, the ceramic structure, when flowing a gas to be treated from one end face any of the above through holes, exits the porous partition walls in the way to the other end, the other end surface enters the adjacent through-holes and it is adapted to flow out the processed gas from. なお、このセラミック構造体は、多孔質体であり、それ故に各貫通孔を隔てる隔壁を通じて互いに通気が可能で、該構造体の中で容易に他の貫通孔へ入る。 Incidentally, the ceramic structure is a porous body, capable of venting each other through hence partition wall separating the through holes, readily enters the other through-holes in the structure. このことのために、ガスの入側と出側とでは、異なる貫通孔を流通していくことになる。 To this end, in the outlet side and the inlet side of the gas, thus continue to flow through the different holes. このようなセラミック構造体に排気ガスを通気すると、上記のようにして一方の端面から流入した排気ガスは、隔壁を通過して流出口に向かう間に、排気ガス中の粒子状物質(パティキュレート)がこの隔壁部分に捕促され浄化される。 When venting exhaust gases to such a ceramic structure, exhaust gas flowing from one end face in the manner described above, while towards the outlet through the partition wall, the particulate matter (particulates in exhaust gas ) is purified prompted catching in the partition wall portion. なお、この排気ガスの上記浄化作用に伴い、とくに流入口側の隔壁には前記パティキュレートが捕集され堆積するため、次第に目詰まりを起こして通気を妨げるようになる。 In line with the above purifying action of the exhaust gas, especially for the inlet side of the partition wall is the particulates are trapped deposited, so restrict airflow causing a gradual clogging. そのため、このセラミック構造体は、定期的に、バーナーやヒーターといった加熱手段によって目詰まりの原因となる隔壁に堆積したパティキュレートを燃焼除去する処理(以下、単に「再生」という)が必要となる。 Therefore, the ceramic structural body, periodically, the process of burning and removing the particulates accumulated on the partition walls that cause clogging by the heating means such as a burner or a heater (hereinafter, simply referred to as "regeneration") is required.

【0003】ところが、上記セラミック構造体では、かかる再生において、不均一な加熱過程やパティキュレートの異常燃焼に伴う局部的な発熱、排気ガスの急激な温度変化が与える熱衝撃などによって、構造体内部に不均一な温度分布が生じ、熱応力が作用する。 [0003] However, in the ceramic structure, in such reproduction, heterogeneous of local accompanying abnormal combustion heat generation of the heating process and particulates, such as by thermal shock given by sudden temperature change of exhaust gas, the internal structure uneven temperature distribution occurs, thermal stress acts on. その結果、上記セラミック構造体は、クラックの発生や溶損を招き、 As a result, the ceramic structural body can lead to generation and melting of cracks,
ひいては破壊に到らしめてパティキュレートの捕集に支障を与えるという問題があった。 Thus tighten lead to destruction there is a problem that give a hindrance to the collection of particulates.

【0004】これに対し従来、上記問題を解決する手段として、例えば、セラミック構造体を、その軸線に垂直な面やその軸線に平行な面で、複数個のセラミック部材に分割することにより、前記セラミック構造体に作用する熱応力を低減させる方法が提案されている(特開昭60 [0004] In contrast Conventionally, as means for solving the above problems, for example, a ceramic structure, in a plane parallel to the vertical surface and its axis to its axis, by dividing into a plurality of ceramic members, the method of reducing thermal stress acting on the ceramic structure has been proposed (JP 60
−65219 号公報参照)。 See JP -65,219). さらに、この分割形のセラミック構造体(以下、「分割セラミック構造体」という)のセラミック部材相互間に生じる隙間に、非接着性のシール材を介挿させることにより、排気ガスのシール性を改善した分割セラミック構造体が提案されている(実開平1−63715 号公報参照)。 Further, the ceramic structure of the segmented (hereinafter, referred to as "divided ceramic structural body") in the gaps formed between the ceramic member mutual, by interposed non-adherent sealant, improved sealing properties of the exhaust gases divided ceramic structure has been proposed that (see Japanese Patent real-Open No. 1-63715).

【0005】上記各提案によれば、分割セラミック構造体は、前記シール材を採用したことによって、一体型のセラミック構造体で見られるような熱応力を開放することができる。 [0005] According to the above proposal, the divided ceramic structural body, by employing the sealing material, it is possible to release the thermal stress, as seen in the ceramic structure integral. しかしながら、上記シール材は非接着性であるため、各セラミック部材を強固に接合できない。 However, since the sealing material is a non-adhesive, it can not be firmly joined to each ceramic member. そのため、上記従来技術にかかる分割セラミック構造体は、セラミック部材を結束させて一構造体としての形態を維持するための拘束力が必要であった。 Therefore, the divided ceramic structural body according to the prior art, binding adapted to maintain the form as an structure by bundling the ceramic member was necessary. この拘束力を付与する手段として、従来、熱膨張性断熱材を最外周部に設けたり、あるいは熱膨張性断熱材を内部シール材として適用している。 As means for applying the restraining force, conventionally, a heat-expandable heat-insulating material is applied or provided in the outermost peripheral portion, or heat-expandable heat-insulating material as an internal sealant.

【0006】しかしながら、上記の非接着性シール材や熱膨張性断熱材は、再生時の熱や、内燃機関から発生する振動の繰り返しに対する耐久性が低く、そのために、 However, non-adhesive sealing member and thermally expansive heat insulator described above, heat and at the time of reproduction, low durability against repetition of oscillation generated from an internal combustion engine, in order that,
シール材は、体積収縮や強度の劣化が進みシール性が低下してしまう一方、熱膨張性断熱材も、体積膨張後の復元力が急激に低下するという問題があった。 Sealing material, while decreases the proceeds sealability deterioration of volume shrinkage and strength, thermally expandable heat insulating material also has a problem that the restoring force after volume expansion is rapidly lowered. 従って、上記分割セラミック構造体は、それを構成する複数個のセラミック部材を支持する力を失い、排気ガスの圧力により分解,飛散してしまうことがあった。 Accordingly, the divided ceramic structural body loses a force for supporting a plurality of ceramic members constituting it, degraded by the pressure of the exhaust gas, there can become scattered. しかも、たとえガスの流出口側端面に補強部材を設けてもシール材の劣化を防止することは難しく、耐久性の改善が望まれていた。 Moreover, it is difficult to even if the reinforcing member is provided on the outlet side end surface of the gas to prevent deterioration of the sealing material, improvement in durability has been desired.

【0007】とくに、大型の分割セラミック構造体を形造るには、さらに大きな拘束力が必要であり、従来の非接着性シール材や熱膨張性断熱材の組合せでは、初期の段階から対応できなくなり、実用に耐え得るものが得られていない。 [0007] In particular, the building form a large split ceramic structure, requires a larger binding force, the combination of conventional non-adhesive sealing member and thermally expansive heat insulator, it can not be supported from the initial stage , it has not been obtained which can withstand practical use.

【0008】このような実情に鑑み、発明者らは、先に、従来技術が抱える上記問題を克服するための手段として、分割セラミック構造体を構成するシール材を改良し、セラミックファイバー,炭化珪素粉末および無機バインダーとからなるシール材を用いた「排気ガス浄化装置およびその構成体」を提案した(特願平5−204242号公報参照)。 [0008] In view of such circumstances, the inventors previously, as a means to overcome the above problems the prior art has faced to improve the sealing material forming the divided ceramic structural body, ceramic fibers, silicon carbide proposed using a sealing material composed of powder and an inorganic binder to "exhaust gas purification apparatus and its structure" (see Japanese Patent Application No. 5-204242). この提案によれば、シール材が複数個のセラミック部材を相互に接合させているので、分割セラミック構造体の耐久性をある程度改善することができる。 According to this proposal, since the sealing material is allowed to join the plurality of ceramic members to each other, the durability of the divided ceramic structural body can be improved to some extent.

【0009】 [0009]

【発明が解決しようとする課題】しかしながら、前記シール材は、セラミック部材相互間に充填され硬化する際に、マイグレーション(溶媒の乾燥除去に伴ってバインダーが移動する現象をいう)を起こし易い傾向があった。 [SUMMARY OF THE INVENTION However, the sealing material, when cured is filled between the ceramic member mutually, tends to cause a migration (with the drying removal of the solvent refers to a phenomenon in which the binder is moving) is there were. そのため、シール材を硬化することにより形成されるシール層が脆弱なものとなる。 Therefore, the sealing layer formed by curing the sealing material is to be brittle. つまり、上記シール材を構成する無機バインダーは、セラミック部材とシール層とを、強固に接合するとともに、前記シール層の応力緩衝機能の発現に重要な要素となる三次元的に交錯したセラミックファイバーの交錯点を接合する作用がある。 That is, the inorganic binder constituting the sealing material, and a ceramic member and a sealing layer, thereby firmly bonding, the ceramic fibers interlaced three-dimensionally, which is an important factor in the expression of the stress buffering function of the seal layer It has the effect of joining the crossing points.
ところが、この無機バインダーは、乾燥硬化の過程で起こるマイグレーションによってシール層内部からセラミック部材との接合面に移動し、前記交錯点の接合力が低下して、ひいてはセラミック構造体自体の強度低下を招くので、所望の耐久性を満足させることができなかった。 However, the inorganic binder moves to the bonding surface of the ceramic member from the internal seal layer by migration occurring in the course of drying and curing, reduced bonding strength of the crossing points, reduced strength of the ceramic structure itself and thus so, it was not possible to satisfy the desired durability. また、上記シール材を構成する炭化珪素粉末も同様に上記マイグレーションに伴って移動し、熱伝導率の低下や不均一を招き、ひいてはセラミック構造体の再生効率低下の原因となった。 Further, the silicon carbide powder constituting the sealing member also moves with the above migration similarly, causes deterioration and nonuniformity of thermal conductivity, causing the regeneration efficiency decreased in turn ceramic structure.

【0010】これに対して、上記マイグレーションを抑制することによって、構造体の耐久性を改善する方法も考えられる。 [0010] In contrast, by suppressing the migration is considered a method of improving the durability of the structure. しかし、この方法は、シール材の乾燥硬化に長時間を要して生産性を悪くするため好ましくない。 However, this method is not preferable because the productivity is worsened it takes a long time to dry curing of the sealant.
以上説明したように、上記従来の分割セラミック構造体は、セラミック構造体としての耐久性等に関し、依然として改善の余地が残されていた。 As described above, the conventional divided ceramic structural body, relates to durability of the ceramic structural body still room for improvement has been left.

【0011】この発明は、従来技術が抱えている上述した種々の問題を解消するためになされたものであり、その主たる目的は、セラミック構造体の耐久性を向上させることにある。 [0011] The present invention has been made to solve various problems described above prior art is having its main object is to improve the durability of the ceramic structure.

【0012】この発明の他の目的は、常温時および高温時におけるシール材の接着性等の材料特性を改善することにある。 Another object is of the present invention is to improve the material properties of the adhesive such as a sealant at normal temperature and high temperature.

【0013】この発明のさらに他の目的は、弾性と耐熱性を維持しつつ、常温時および高温時におけるシール材の接着性ならびに熱伝導性を改善することにより、分割セラミック構造体の耐久性と再生効率の両方を同時に向上させることにある。 Still another object of the present invention, while maintaining elasticity and heat resistance, by improving the adhesion and thermal conductivity of the sealing material at normal temperature and high temperature, and durability of the divided ceramic structural body It is to improve both the regeneration efficiency at the same time.

【0014】 [0014]

【課題を解決するための手段】上記目的の実現に向け、 In order to achieve the above object, for the realization of the above-mentioned purpose,
はらは鋭意研究を続けた結果、以下に示す内容を要旨構成とする発明を見だした。 Results Hara was continued extensive studies, the heading of the invention that the contents shown below the summary and construction. すなわち、この発明は、長手方向に沿って並列する複数の貫通孔を有し、かつ、これらの貫通孔の各端面は、それぞれ市松模様状に目封じされていると共に、ガスの入側と出側とでは開閉が逆の関係にあり、そして、これらの貫通孔の隣接するものどうしは、多孔質な隔壁を通じて互いに通気可能にしたセラミック部材を、複数個結束させて集合体としたセラミック構造体において、前記各セラミック部材の相互間に、 That is, this invention has a plurality of through-holes arranged in parallel along the longitudinal direction, and the end faces of the through holes, along with being sealed to each checkered pattern, incoming and outgoing side of the gas have a relationship closing the opposite in the side and the adjacent ones with each other in the through holes, porous ceramic member that enables venting each other through partition walls, the ceramic structure was an aggregate by a plurality bundling in, therebetween of each ceramic member,
少なくとも無機繊維、無機バインダー、有機バインダーおよび無機粒子からなるものを充填し、乾燥し、硬化して、前記無機繊維と、無機粒子と、無機バインダーの加熱焼成によって生成するセラミックスとが、三次元的に交錯する構造の弾性質シール材を形造り、そのシール材を介して前記各セラミック部材一体に接着されてお Filling at least inorganic fibers, an inorganic binder, one made of an organic binder and inorganic particles, dried and cured, and the inorganic fibers, inorganic particles, a ceramic produced by heating and firing the inorganic binder, three-dimensional shape building the elastic membrane sealing material structure crossing to, contact each ceramic member through the sealing member is bonded together
り、とくに前記無機粒子として、炭化珪素、窒化珪素、 Ri, as particularly the inorganic particles, silicon carbide, silicon nitride,
および窒化硼素から選ばれる少なくとも1種以上の無機 And at least one or more inorganic selected from boron nitride
粉末またはウィスカーを用いることを特徴とするセラミック構造体である。 The use of a powder or whisker is a ceramic structure characterized.

【0015】ここで、前記シール材において 、無機繊維として 、シリカ−アルミナ、ムライト、アルミナおよびシリカから選ばれる少なくとも1種以上のセラミックファイバーを用い、無機バインダーとしては、シリカゾルおよびアルミナゾルから選ばれる少なくとも1種以上のコロイダルゾルを用い、 そして有機バインダーとしては、ポリビニルアルコール、メチルセルロース、エチルセルロースおよびカルボメトキシセルロースから選ばれる少なくとも1種以上の多糖類を用いることが望ましい。 [0015] Here, in the sealing material, the inorganic fibers, silica - using alumina, mullite, at least one or more ceramic fibers selected from alumina and silica, the inorganic binder, at least selected from silica sol and alumina sol using one or more colloidal sol, and as the organic binder, polyvinyl alcohol, methyl cellulose, that are use of at least one or more kinds of polysaccharides selected from cellulose and carbomethoxy cellulose desirable.

【0016】具体的には、上記シール材は、下記に述べる構成を具えることがより好ましい。 [0016] Specifically, the sealing material is more preferably comprising a structure described below. . セラミックファイバーのうち、シリカ−アルミナセラミックファイバーの含有量は、固形分で、10〜70wt Among the ceramic fibers, silica - alumina content ceramic fiber is a solid, 10 to 70 weight
%,好ましくは10〜40wt%,より好ましくは20〜30wt% %, Preferably 10~40wt%, more preferably 20~30wt%
であることが望ましい。 It is desirable that. この理由は、含有量が10wt%未満では弾性体としての効果が低下し、一方、70wt%を超えると熱伝導率の低下を招くと共に、弾性体としての効果が低下するからである。 The reason for this reduced the effect as an elastic body is less than 10 wt% content, while when it exceeds 70 wt% with lowering the thermal conductivity, since the effect as an elastic body lowers.

【0017】. [0017]. コロイダルゾルのうち、シリカゾルの含有量は、固形分で、1〜30wt%,好ましくは1〜15wt Of colloidal sol, the content of silica sol is a solid, 1-30 wt%, preferably 1~15wt
%,より好ましくは5〜9wt%であることが望ましい。 %, And more preferably a 5~9Wt%.
この理由は、含有量が1wt%未満では接着強度の低下を招き、一方、30wt%を超えると熱伝導率の低下を招くからである。 The reason for this can lead to deterioration of the adhesive strength is less than 1 wt% content, whereas, because lowering the thermal conductivity exceeds 30 wt%.

【0018】. [0018]. 多糖類のうち、カルボキシメチルセルロースの含有量は、固形分で、0.1〜5.0 wt%,好ましくは 0.2〜1.0 wt%,より好ましくは0.4 〜0.6 wt%であることが望ましい。 Among polysaccharides, the content of carboxymethyl cellulose is a solid, 0.1 to 5.0 wt%, preferably 0.2 to 1.0 wt%, and particularly preferably in the range of 0.4 to 0.6 wt%. この理由は、含有量が0.1 wt%未満ではマイグレーションを抑制できず、一方、5.0 wt% The reason for this can not suppress the migration in a content of less than 0.1 wt%, whereas, 5.0 wt%
を超えると高温の熱履歴により有機バインダーが焼失し、強度が低下するからである。 The organic binder is burned off by more than the high-temperature heat history, the strength is lowered.

【0019】. [0019]. 無機粉末またはウィスカーのうち、炭化珪素粉末の含有量は、固形分で、3〜80wt%,好ましくは10〜60wt%,より好ましくは20〜40wt%であることが望ましい。 Among the inorganic powder or whisker, content of silicon carbide powder, a solid content, 3~80Wt%, preferably 10 to 60 wt%, and particularly preferably in the range of 20 to 40 wt%. この理由は、含有量が3wt%未満では、熱伝導率の低下を招き、一方、80wt%を超えると高温時での接着強度の低下を招くからである。 The reason for this is less than 3 wt% content leads to reduction in the thermal conductivity, whereas, because lowering the adhesive strength at high temperatures exceeding 80 wt%.

【0020】. [0020]. 上記シール材を構成するセラミックファイバーのうち、シリカ−アルミナセラミックファイバーは、そのショット含有量が1〜10wt%,好ましくは1 Of the ceramic fiber constituting the sealing material, silica - alumina ceramic fibers, 110 wt.% Is the shot content, preferably 1
〜5wt%,より好ましくは1〜3wt%で、繊維長が1〜 To 5 wt%, more preferably 1 to 3 wt%, fiber length 1
100mm,好ましくは1〜50mm,より好ましくは1〜20mm 100mm, preferably 1~50mm, more preferably 1~20mm
であることが望ましい。 It is desirable that. この理由は、ショット含有量を1wt%未満にするのは製造上困難であり、ショット含有量が50wt%を超えると、被シール材(セラミック部材) The reason for this is, to the shot content to less than 1 wt% is difficult in manufacturing, when the shot content exceeds 50 wt%, the sealing material (ceramic member)
の壁を傷つけるからである。 This is because damage to the wall. 一方、繊維長は、1mm未満では弾性構造体を形成することができず、 100mmを超えると、毛玉のようになって無機微粒子の分散を悪くすると共に、シール材の厚みを薄くできないために被シール材間の熱伝導性の低下を招くからである。 On the other hand, the fiber length is less than 1mm can not form a resilient structure, exceeds 100 mm, as well as poor dispersion of the inorganic fine particles is as pills, because it can not reduce the thickness of the sealing material This is because lowering the heat conductivity between the sealing member.

【0021】. [0021]. 上記シール材を構成する無機粉末またはウィスカーのうち、炭化珪素粉末は、その粒径が0.01 Among the inorganic powder or whisker constituting the sealing material, silicon carbide powder, whose particle diameter 0.01
〜100 μm,好ましくは0.1 〜15μm,より好ましくは To 100 [mu] m, preferably 0.1 15 m, more preferably
0.1〜10μmであることが望ましい。 It is desirable that the 0.1~10μm. この理由は、粒径が 100μmを超えると、接着力(強度)および熱伝導性の低下を招き、一方、0.01μm未満ではコスト高になるからである。 The reason is that when the particle size exceeds 100 [mu] m, cause a decrease in adhesive strength (strength) and thermal conductivity, while it is less than 0.01μm is because high cost.

【0022】 [0022]

【作用】この発明にかかるセラミック構造体の特徴は、 [Action], wherein the ceramic structure according to the invention,
複数個のセラミック部材を一体に接合して結束できるシール材の構成にある。 There a plurality of ceramic members on the configuration of the sealing member that can be bundled and joined together. 具体的には、まず第1に、シール材を構成する無機繊維と有機バインダーが相互に絡み合うことにより、組織の均一性と低温領域での接合性を改善し、セラミック構造体の耐久性を向上させた点にある。 More specifically, first of all, by the inorganic fibers and organic binder constituting the sealing material entangled with each other to improve the uniformity and bondability in a low temperature range of tissues, improving the durability of the ceramic structural body there is the point that was. つまり、早期に乾燥硬化する有機バインダーを採用することによって、従来のシール材で見られるようなマイグレーションの発生を抑制し、無機繊維どうしの三次元的な結合の維持と、無機繊維への無機粒子の固定化を可能とした点に特徴がある。 In other words, by adopting an organic binder to dry cure prematurely, suppressing the occurrence of migration as seen in the conventional sealing member, and maintenance of the three-dimensional binding of each other inorganic fibers, inorganic particles to inorganic fibers it is characterized in that to enable the immobilization. これにより、シール材を、 As a result, the sealing material,
組織的に均一で、かつ接着性,弾性および強度に優れる弾性質素材とすることができ、その結果、このようなシール材によって複数個のセラミック部材を一体に結束したセラミック構造体は、外部からの拘束力を与えなくても十分な接着強度を有し、同時に熱応力を開放することができる。 Systematic uniform and adhesive may be an elastic membrane material having excellent elasticity and strength, as a result, the ceramic structure united a plurality of ceramic members together by such sealing material from outside without giving the binding has a sufficient adhesive strength, it is possible to simultaneously release the thermal stress.

【0023】第2の特徴は、シール材を構成する無機繊維と無機バインダーとの絡み合いの効果で、高温領域での接着強度を維持できる点にある。 The second feature is the entanglement of the effect of the inorganic fibers and the inorganic binder constituting the sealing member, in that it can maintain the adhesive strength at a high temperature region. その理由は、高温領域では、有機バインダーは焼成除去されてしまうが、無機バインダーが加熱によってセラミック化され、このセラミックスが、無機繊維どうしの交錯点に存在し、無機繊維どうしおよびセラミック部材との接合に寄与するものと考えられている。 The reason is that the high temperature region, but the organic binder would be fired removed, the inorganic binder is a ceramic by heating, the ceramic is present in interlacing point of each other inorganic fibers, bonding between the inorganic fibers each other and the ceramic member It is believed to contribute to. 一方で、この無機バインダーは、 On the other hand, the inorganic binder,
乾燥および加熱により低温領域でも接着強度を保持できる。 Drying and heating to hold the adhesive strength even in a low temperature region.

【0024】従って、シリカ−アルミナなどのセラミックファイバーとシリカゾルなどの無機バインダーの絡み合いによる上記の効果と、前記有機バインダーとの相乗効果により、低温域および高温域での接着強度に優れるセラミック構造体とすることができる。 [0024] Thus, silica - the above effect by entanglement of the inorganic binders, such as ceramic fibers and silica sol such as alumina, by the synergistic effect with the organic binder, the ceramic structural body having excellent adhesion strength in the low-temperature region and high temperature region can do.

【0025】第3の特徴は、無機粒子が、無機繊維の表面や無機バインダーの表面及び内部に介在して、セラミック構造体の熱伝導率を改善する点にある。 The third feature, the inorganic particles, interposed surface and the interior surface and an inorganic binder for inorganic fibers, lies in improving the thermal conductivity of the ceramic structure. 特に、窒化物や炭化物の無機粒子は、窒化物もしくは炭化物の持つ高熱伝導特性により、熱伝導率を著しく向上させることができる。 In particular, the inorganic particles of nitrides or carbides may be by high thermal conductivity characteristics of nitrides or carbides, significantly improve the thermal conductivity.

【0026】従って、上記無機粒子を含むシール材は、 [0026] Thus, the sealing material containing the above inorganic particles,
熱伝導率に優れ、例えば、排気ガス浄化装置用フィルタに用いると、複数のセラミック部材を組み合わせたときにできる空隙を埋めると同時に、再生時に温度ピーク現象を招くことなく、セラミック構造体の破損を有効に防止することができる。 Excellent thermal conductivity, for example, using the exhaust gas purifying apparatus filter, at the same time fill the voids formed when a combination of a plurality of ceramic members, without causing the temperature peak phenomenon at the time of reproduction, the breakage of the ceramic structure it can be effectively prevented. しかも、熱サイクルによるクラックの発生が低減され、フィルタ外周のエッジ部の加熱も比較的短時間ででき、再生効率を向上させることができる。 Moreover, occurrence of cracks due to thermal cycles is reduced, the heating of the edge portion of the filter outer periphery can also be a relatively short time, thereby improving the regeneration efficiency.

【0027】以下、この発明のセラミック構造体について詳細に説明する。 [0027] Hereinafter, the ceramic structure of the present invention will be described in detail. セラミック構造体は、排気ガス浄化装置用フィルタとして用いる場合には、それを構成するシール材が、耐熱性のほかに、弾性、熱伝導性、接合性および強度等を備えていることが必要である。 Ceramic structure, when used as a filter for an exhaust gas purifying apparatus, sealing material forming it is, in addition to heat resistance, elasticity, thermal conductivity, must be provided with a joining property and strength such as is there. 弾性に優れていると、加熱によってフィルタに熱応力が加わるようなときでも、その熱応力を確実に開放することができるからである。 When is excellent in elasticity, even when such a thermal stress is applied to the filter by heating, it is because it is possible to reliably release the thermal stress. また、熱伝導性に優れていると、発熱体の熱が構造体全体に速やかにかつムラなく伝導し、排気ガス浄化装置内部の温度差も小さくなるからである。 Also, when excellent in thermal conductivity, heat of the heating element is conducted quickly and evenly throughout the structure, since also small temperature difference between the inner exhaust gas purification device. また、接合性および強度に優れたものであると、隣接して結束されているセラミック部材同士の接着性が優れ、セラミック構造体自体の耐久性も優れるものとなるからである。 Further, when it is excellent in bonding property and strength, the adhesion of the ceramic member to each other that are bound to adjacent superior, because the excellent also durability of the ceramic structural body itself.

【0028】この発明は、上記物性を示すシール材の構成として、無機繊維,無機バインダー,有機バインダーおよび無機粒子を用い、かつ、三次元的に交錯する前記無機繊維と無機粒子とを、前記の無機バインダーおよび有機バインダーを介して互いに結合して弾性構造体としたことを特徴とする。 [0028] The present invention, as a constituent of the sealing member exhibiting the above properties, inorganic fibers, an inorganic binder, an organic binder and inorganic particles, and, and said inorganic fibers and inorganic particles intermingled three-dimensionally, of the through the inorganic binder and organic binder, characterized in that bonded to the elastic structure with each other.

【0029】ここで、無機繊維としては、シリカ−アルミナセラミックファイバー、ムライトファイバー、アルミナファイバーおよびシリカファイバーがあるが、特にシリカ−アルミナセラミックファイバーが望ましく、弾性に優れると共に熱応力を吸収する作用を示す。 [0029] As the inorganic fibers, silica - alumina ceramic fiber, mullite fiber, there are alumina fibers and silica fibers, in particular silica - shows alumina ceramic fiber is desirable, the function of absorbing thermal stress is excellent in elasticity .

【0030】無機バインダーとしては、コロイダルゾルが望ましく、例えば、アルミナゾル、シリカゾルがあるが、特にシリカゾルが望ましく、接着剤(無機バインダー)として作用する。 [0030] As the inorganic binder, colloidal sol is desirable, for example, alumina sol, there is a silica sol, in particular silica sol is desirable, which acts as an adhesive (inorganic binder). このシリカゾルは、入手しやすく、焼成により容易にSiO 2となるため高温領域での接着剤として好適であり、しかも、絶縁性に優れている。 This silica sol is easily available, is suitable as an adhesive at high temperature region because easily become SiO 2 by firing, moreover, has excellent insulating properties.

【0031】有機バインダーとしては、親水性有機高分子が望ましく、特に多糖類がより好ましい。 [0031] As the organic binder, a hydrophilic organic polymer is preferable, and more preferably, especially polysaccharides. 具体的には、ポリビニルアルコールやメチルセルロース、エチルセルロース、カルボキシメチルセルロースなどがあるが、特にカルボキシメチルセルロースが望ましく、組立時の流動性を確保し(作業性向上に寄与し)、常温領域での優れた接着性を示す。 Specifically, polyvinyl alcohol, methyl cellulose, ethyl cellulose, and the like carboxymethyl cellulose, (contributing to workability improvement) in particular carboxymethylcellulose is desirable to ensure the fluidity during assembly, excellent adhesion at a normal temperature region It is shown.

【0032】無機粒子としては、炭化物および/または窒化物の無機粒子が望ましく、例えば炭化珪素、窒化珪素および窒化硼素がある。 [0032] As the inorganic particles, inorganic particles are preferably of the carbide and / or nitride, for example silicon carbide, there is a silicon nitride, and boron nitride. これらの炭化物や窒化物は、 These carbides and nitrides,
熱伝導率が非常に大きく、セラミックファイバー表面やコロイダルゾルの表面および内部に介在して熱伝導性の向上に寄与する。 Thermal conductivity is very large, which contributes to the improvement of thermal conductivity is interposed surface and inside of the ceramic fiber surface and colloidal sol. 例えば、炭化珪素の熱伝導率は0.19ca For example, the thermal conductivity of silicon carbide is 0.19ca
l/cm・sec ・℃、窒化硼素の熱伝導率は 0.136 cal/c l / cm · sec · ℃, the thermal conductivity of boron nitride is 0.136 cal / c
m・sec ・℃、これに対してアルミナの熱伝導率は0.08 m · sec · ℃, the thermal conductivity of alumina hand 0.08
cal/cm・sec ・℃程度であり、特に炭化物や窒化物は、熱伝導率の改善に効果的であることが判る。 Was cal / cm · sec · ℃ about, particularly carbides and nitrides, it is found to be effective in improving the thermal conductivity. これらの炭化物および窒化物の無機粒子のうち、特に炭化珪素は熱伝導の点で最適である。 Among the inorganic particles of these carbide and nitride, especially silicon carbide is optimal in terms of thermal conductivity. 窒化硼素は、セラミックファイバーとのなじみが炭化珪素より低いからである。 Boron nitride is because familiar with the ceramic fibers is lower than silicon carbide. すなわち、接着性、耐熱性、耐水性および熱伝導率を総て兼ね備えているのが炭化珪素であることがその理由である。 That is, adhesion, heat resistance, it is reason to combines all the water resistance and thermal conductivity of silicon carbide.

【0033】 [0033]

【実施例】以下に、この発明のセラミック構造体をディーゼルエンジンに取り付けられる排気ガス浄化装置用フィルタに具体化した実施例を図1〜図5に基づき詳しく説明する。 EXAMPLES Hereinafter, explaining the ceramic structure of the present invention based on an embodiment embodying the exhaust gas purifying device for a filter to be attached to a diesel engine in FIGS detail. 図1は、この発明のセラミック構造体を用いた排気ガス浄化装置用フィルタ1を示す図であり、図2 Figure 1 is a diagram showing an exhaust gas purifying apparatus filter 1 using the ceramic structure of the present invention, FIG. 2
は、このフィルタの部分断面拡大図である。 Is a partial cross-sectional enlarged view of the filter. これらの図において、排気ガス浄化装置用フィルタ1は、8本の角柱状のセラミック部材2と4本の断面直角二等辺三角形状のセラミック部材3を、部材相互間に弾性質素材からなるシール材(厚さ1.5 〜3.0mm )4を介在させて一体に接着して構成されている。 In these figures, the exhaust gas purifying device for filter 1, the eight prismatic ceramic members 2 and four cross right isosceles triangular ceramic member 3, a sealing material made of an elastic membrane material between the members mutually (thickness 1.5 ~3.0mm) 4 interposed therebetween and is configured by bonding together. 図3〜5は、排気ガス浄化装置用フィルタ1の一部分を構成しているセラミック部材2を示す図である。 3-5 is a diagram showing a ceramic member 2 constituting a portion of the exhaust gas purifying apparatus filter 1. これらの図において、角柱状(33 In these figures, prismatic (33
mm×33mm×150mm )のセラミック部材2には、断面略正方形状の貫通孔2aがその軸線方向に沿って規則的に穿設されている。 The ceramic member 2 mm × 33mm × 150mm), are regularly bored substantially square sectional shape of the through hole 2a along the axial direction thereof. これらの貫通孔2aは、厚さ0.3mm の多孔質な隔壁2bによって互いに隔てられている。 These through-holes 2a are separated from each other by porous partition walls 2b of thickness 0.3 mm. 各貫通孔2aの排気ガス流入側または流出側のいずれかの一端は、多孔質焼結体製の封止片2cによって市松模様状に封止されている。 One end of the exhaust gas inlet side or outlet side of each through-hole 2a is sealed in a checkered pattern by a porous sintered body made of Futomehen 2c. その結果、セラミック部材2の流入側または流出側のいずれか一方のみに開口するセルC1,C2が形成された状態となっている。 As a result, in a state of cells C1, C2 is formed which is open only to either the inlet side or outlet side of the ceramic member 2. なお、セルC1,C2の隔壁2bには、 Incidentally, the partition walls 2b of the cells C1, C2 is
白金族元素やその他の金属元素およびその酸化物等からなる酸化触媒を担持してもよい。 Platinum group elements and other metal elements and oxidation catalyst that comprises an oxide or the like may be carrying. 担持するとパティキュレートの着火温度が低下するためである。 When carrying because the ignition temperature of the particulates is lowered. また、セラミック部材3は、断面形状が直角二等辺三角形状であることを除いてセラミック部材2と同様の構成を有している。 Further, the ceramic member 3 has the same configuration as the ceramic member 2 except that the cross-sectional shape is a right-angled isosceles triangle. そして、本実施例の排気ガス浄化装置用フィルタ1 Then, the exhaust gas purifying apparatus filter 1 of this embodiment
を構成するセラミック部材2,3の場合、平均気孔径が For ceramic members 2, 3 constituting the average pore diameter
10μm、気孔率が43%、セル壁の厚さが0.3mm 、セルピッチが1.8mm に設定されている。 10 [mu] m, porosity 43%, thickness of the cell walls is 0.3 mm, the cell pitch is set to 1.8 mm. 本実施例は、以上説明したような構成にある排気ガス浄化装置用フィルタ1を作製して、そのフィルタの性能評価を行ったものである。 This embodiment is to produce a exhaust gas purifying apparatus filter 1 in the configuration as described above, in which performance evaluation of the filter.

【0034】(実施例1) (1) α型炭化珪素粉末51.5重量%とβ型炭化珪素粉末22 [0034] (Example 1) (1) alpha-type silicon carbide powder 51.5 wt% and β-type silicon carbide powder 22
重量%とを湿式混合し、得られた混合物に有機バインダー(メチルセルロース)と水とをそれぞれ6.5重量%、2 Wt% and a wet mixed, the resultant organic binder (methyl cellulose) in a mixture with 6.5 wt% of water, respectively, 2
0重量%ずつ加えて混練した。 By 0 wt% added was kneaded. 次に、可塑剤と潤滑剤を少量加えてさらに混練し、この混練物を押出成形することにより、ハニカム状の生成形体を得た。 Then, further kneaded by adding a small amount of a plasticizer and lubricant, by extruding the kneaded product to obtain a honeycomb-shaped molded body. (2) 次に、この生成形体をマイクロ波による乾燥機を用いて乾燥し、その後、成形体の貫通孔2aを多孔質焼結体製の封止片2c形成用のペーストによって封止した後、再び乾燥機を用いて封止片2c用ペーストを乾燥させた。 (2) Next, this raw formed body was dried by using a drier microwave, then, after sealing by through-hole 2a of the porous sintered body made of Futomehen 2c forming a paste of the molding It was dried Futomehen 2c paste again using the dryer. そして、この乾燥体を400 ℃で脱脂した後、更にそれをアルゴン雰囲気下にて2200℃で焼成し、多孔質でハニカム状のセラミック部材2,3を得た。 Then, after degreasing the dried body at 400 ° C., and calcined at further 2200 ° C. it under argon atmosphere to obtain a ceramic members 2 honeycomb porous. (3) セラミックファイバー(アルミナシリケートセラミックファイバー、ショット含有率3%、繊維長さ0.1 〜 (3) ceramic fiber (alumina silicate ceramic fiber, shot content 3%, fiber length 0.1
100 mm)23.3重量%、平均粒径0.3 μmの炭化珪素粉末 100 mm) 23.3 wt%, average particle diameter 0.3 [mu] m of silicon carbide powder
30.2重量%、無機バインダーとしてのシリカゾル(ゾルのSiO 2の換算量は30%)7重量%、有機バインダーとしてのカルボキシメチルセルロース 0.5重量%および水39 30.2 wt% silica sol as an inorganic binder (in terms of SiO 2 of the sol was 30%) 7 wt%, 0.5 wt% carboxymethylcellulose as an organic binder and water 39
重量%を混合し、混練したものをペースト状にしてシール材を作成した。 It was mixed wt% to prepare a sealant that were kneaded into a paste. (4) セラミック部材2、3相互間に前記シール材を充填し、50〜100 ℃×1時間にて乾燥,硬化して、セラミック部材2、3とシール材4とを接合して一体化した,図1に示すようなフィルタ1を作製した。 (4) filled with the sealing material between the ceramic members 2, 3 mutually, dried at 50 to 100 ° C. × 1 hour, and cured to integrally joining the ceramic members 2, 3 and the sealing material 4 to prepare a filter 1 as shown in FIG. なお、上記シール材は、マイグレーションを引き起こすことなく乾燥,硬化することができた。 Incidentally, the sealing material could be without drying, curing to cause migration.

【0035】(実施例2)本実施例は、基本的に実施例1と同様であるが、シール材を実施例1にあるものに代えて次のものとした。 [0035] (Embodiment 2) This embodiment is basically the same as that in Example 1, it was of the following in place of some of the sealing material in Example 1. セラミックファイバー(ムライトファイバー、ショット含有率5% 繊維長さ0.1 〜100 Ceramic fiber (mullite fiber, shot content of 5% fiber length from 0.1 to 100
mm)25重量%、平均粒径1.0 μmの窒化珪素粉末30重量%、無機バインダとしてのアルミナゾル(アルミナゾルの換算量は20%)7重量%、有機バインダーとしてのポリビニルアルコール0.5 重量%およびアルコール37.5重量%を混合し、混練したものを使用した。 mm) 25 wt%, average particle diameter 1.0 30 wt% silicon nitride powder of [mu] m, alumina sol as an inorganic binder (in terms of the amount of alumina sol of 20%) 7% by weight, polyvinyl alcohol 0.5% by weight and an alcohol 37.5 weight as an organic binder % were mixed, was used after kneading. なお、上記シール材は、マイグレーションを引き起こすことなく乾燥,硬化することができた。 Incidentally, the sealing material could be without drying, curing to cause migration.

【0036】(実施例3)本実施例は、基本的に実施例1と同様であるが、シール材を実施例1にあるものに代えて次のものとした。 [0036] (Embodiment 3) This embodiment is basically the same as that in Example 1, it was of the following in place of some of the sealing material in Example 1. セラミックファイバー(アルミナファイバー、ショット含有率4% 繊維長さ0.1 〜100 Ceramic fiber (alumina fiber, shot content rate of 4% fiber length from 0.1 to 100
mm)23重量%、平均粒径1μmの窒化硼素粉末35重量%、無機バインダとしてのアルミナゾル(アルミナゾルの換算量は20%)8重量%、有機バインダーとしてのエチルセルロース0.5 重量%およびアセトン35.5重量%を混合し、混練したものを使用した。 mm) 23 wt%, average particle size 1 [mu] m 35 wt% boron nitride powder, alumina sol as an inorganic binder (in terms of the amount of alumina sol 20%) 8% by weight, of ethyl cellulose 0.5 wt% and 35.5 wt% acetone as an organic binder mixed, was used after kneading. なお、上記シール材は、マイグレーションを引き起こすことなく乾燥,硬化することができた。 Incidentally, the sealing material could be without drying, curing to cause migration.

【0037】(比較例1)本実施例は、基本的に実施例1と同様であるが、シール材を実施例1にあるものに代えて従来のシール材である以下のものとし、さらに、最後に、フィルタ1の最外周部をセラミックファイバーの断熱材(セラミックファイバー63重量%、α−セピオライト7重量%、未膨張バーミキュライト20重量%および有機結合剤10重量%)で被覆した。 [0037] (Comparative Example 1) The present embodiment is basically the same as that in Example 1, and the following is a conventional sealing member in place of some of the sealing material in Example 1, further, Finally, covering the outermost portion of the filter 1 with a heat insulating material of ceramic fiber (ceramic fiber 63% by weight, alpha-sepiolite 7 wt%, unexpanded vermiculite 20% by weight and an organic binder 10 wt%). セラミックファイバー(アルミナ−シリカファイバー、ショット含有率2.7 Ceramic fiber (alumina - silica fibers, shot content rate 2.7
%、繊維長さ30〜100 mm)44.2重量%、無機バインダーとしてのシリカゾル13.3重量%および水42.5重量%を混合し、混練したものをペースト状またはシート状にして使用した。 %, Fiber length 30 to 100 mm) 44.2 wt%, were mixed silica sol 13.3 wt% and 42.5 wt% water as an inorganic binder, it was used as a material obtained by kneading a paste or sheet form. なお、上記シール材は、乾燥,硬化する際に、マイグレーションを引き起こした。 Incidentally, the sealing material is dried, the time of curing caused a migration.

【0038】実施例1〜3および比較例1で作製したフィルタ1の性能評価を以下に示す方法にて実施した。 [0038] The performance evaluation of the filter 1 prepared in Example 1-3 and Comparative Example 1 was carried out by the method described below. (初期およびヒートサイクル後の接着強度の測定)図6 (Measurement of adhesion strength after initial and heat cycle) 6
に示すように、フィルタ1から、セラミック部材3個分をテストピースとして切出し、中心のセラミック部材に荷重をかけ、剥がれが生じた時の荷重を測定した。 As shown in, the filter 1, cut out three partial ceramic member as a test piece, a load on the ceramic member in the center, was measured load at which peeling occurs. また、実際の使用では、常温から900 ℃までの急熱、急冷が予想されるため、室温〜 900℃のヒートサイクルテストを行ったものについても評価した。 Further, in practical use, for rapid heat from room temperature to 900 ° C., rapidly cooled is expected, it was also evaluated for having been subjected to the heat cycle test of room temperature ~ 900 ° C.. 表1には、フィルタ1を構成するセラミック部材2、3相互間の初期およびヒートサイクル後(100 回後)の接着強度の測定結果を示した。 Table 1 shows the measurement results of the adhesion strength after initial and heat cycle between the ceramic members 2, 3 together and constituting the filter 1 (after 100 times).

【0039】 [0039]

【表1】 [Table 1]

なお、ヒートサイクル後の方が強度が向上する理由は、 The reason why the later heat cycle is improved strength is,
900 ℃の加熱によるシリカの焼結作用のためであると推定される。 It is presumed to be due to the sintering action of silica by heating 900 ° C..

【0040】(熱伝導率の測定)図7に示すように、セラミック部材4個分をテストピースとして切出し、外周を断熱材で囲い、ヒーター6の上に設置して20分間加熱する。 [0040] (Measurement of thermal conductivity) as shown in FIG. 7, cut four partial ceramic member as a test piece, surrounds the outer periphery with a heat insulating material, and heating was placed on the heater 6 20 min. この時のT1とT2の温度差を測定した。 The temperature difference between T1 and T2 at this time was measured. 表2には、 In Table 2,
図7に示すT1とT2の温度差を各実施例1〜3および比較例について測定した結果を示した。 The temperature difference between T1 and T2 shown in FIG. 7 shows results of measurement for each of Examples 1-3 and Comparative Examples.

【0041】 [0041]

【表2】 [Table 2]

【0042】以上の結果から明らかなように、この発明のセラミック構造体を用いたフィルタは、高温、常温でも非常に高い接着強度を有し、熱サイクル特性にも優れることから、フィルタとしての耐久性に優れることを確認した。 [0042] As apparent from the above results, the filter using the ceramic structural body of the present invention, high temperature has a very high adhesive strength even at room temperature, since it is excellent in heat cycle property, durability as a filter it was confirmed that the excellent sex. しかも、このセラミック構造体は、熱伝導性にも優れるので、フィルタ内部に位置するセラミック部材でのピーク温度の発生を低減でき、エッジ部分に位置するセラミック構造体の昇温時間を短縮させることができることから、再生効率の向上を同時に実現させることができる。 Moreover, the ceramic structure, since superior thermal conductivity, it is possible to reduce the occurrence of peak temperature in the ceramic member located inside the filter, making it possible to shorten the Atsushi Nobori time of the ceramic structural body located at the edge portion because it can, it is possible to realize improvement of the regeneration efficiency at the same time.

【0043】なお、この発明のセラミック構造体が適用されるフィルタ1の構成は、上記実施例に記載のものに限定されることはなく、以下のような構成に変更することが可能である。 [0043] The configuration of filter 1 ceramic structure of the invention is applied is not limited to those described in the above examples, it is possible to change the following configuration. 例えば、 (a)セラミック部材の組み合わせ数は前記実施例のように12個でなくても良く、任意の数にすることが可能である。 For example, (a) the number of combinations of ceramic members may not be 12 as in the above embodiment and can be any number. この場合、サイズ・形状等の異なるセラミック部材を適宜組み合わせて使用することも勿論可能である。 In this case, it is of course possible to use a combination of different ceramic member of such size and shape as appropriate.
なお、セラミック部材を複数個組み合わせた構成を採ることは、大型の排気ガス浄化装置用フィルタを作製するときに特に有利である。 Incidentally, adopting the configuration combining a plurality of ceramic members is particularly advantageous when producing a large exhaust gas purifying apparatus filter of. (b)前記実施例のフィルタ1は、いわば1つの大きなフィルタが軸線方向に沿って複数個に分割された状態になっているとも捉えることができる。 Filter 1 (b) above embodiment can be understood to speak one large filter is in the state of being divided into a plurality in the axial direction. そこで、例えばフィルタをドーナツ状に分割した状態、軸線方向に垂直に分割した状態などにするというような変形例も考えられる。 Therefore, for example, a state of dividing the filter into a donut shape, is also considered modified as that in such a state divided perpendicularly to the axial direction. (c)前記実施例にて示したようなハニカム状のセラミック部材2,3のみに限られず、例えば三次元網目構造、フォーム状、ヌードル状、ファイバー状等を採用することが勿論可能である。 (C) not limited to a honeycomb-shaped ceramic members 2, 3 as shown in the embodiment, for example, three-dimensional network structure, foam, like noodles, it is of course possible to employ a fiber-like shape. また、セラミック部材2,3 Further, the ceramic members 2, 3
用の材料として、炭化珪素以外のものを選択しても勿論良い。 As a material for use, it is selected other than silicon carbide course good. (d)フィルタ1を構成する場合、セラミック部材2, (D) When configuring the filter 1, the ceramic member 2,
3相互間にヒータを設けてなる構成としてもよい。 Heaters may be provided comprising constituting between 3 mutually. この場合、ヒータは金属線であることのみに限定されない。 In this case, the heater is not limited to being a metal wire.
つまり、ヒータは、金属メタライズ、導体ペーストの印刷、スパッタリング等といった方法によって作製したものであってもよい。 That is, the heater is a metal metallized, printed conductive paste, or may be prepared by methods such as sputtering or the like.

【0044】本実施例においては、この発明のセラミック構造体を、ディーゼルエンジンに取り付けられる排気ガス浄化装置用フィルタに具体化した例について説明したが、このセラミック構造体は、排気ガス浄化装置用フィルタ以外にも、例えば、熱交換器用部材、あるいは高温流体,高温蒸気の濾過フィルタとして使用することができる。 [0044] In this embodiment, the ceramic structure of the invention has been described as being embodied in an exhaust gas purifying device for a filter to be attached to the diesel engine, this ceramic structural body is a filter for an exhaust gas purifying device Besides, for example, the heat exchanger member or a hot fluid, may be used as the filtration filter of high-temperature steam.

【0045】 [0045]

【発明の効果】以上説明したようにこの発明のセラミック構造体は、温度に関係なく接着強度に優れ、しかも熱伝導率にも優れるので、例えば、排気ガス浄化装置用フィルタに適用すると、再生時間の短縮、再生効率や耐久性の向上を実現することができる。 Ceramic structure of the invention described above, according to the present invention is excellent in adhesion strength regardless of temperature, and since also excellent in thermal conductivity, for example, when applied to an exhaust gas purifying apparatus filter, playback time shortened, it is possible to realize improvement of regeneration efficiency and durability.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】この発明のセラミック構造体を用いた排気ガス浄化装置用フィルタを示す斜視図である。 1 is a perspective view showing an exhaust gas purifying device for filter using the ceramic structural body of the present invention.

【図2】この発明のセラミック構造体を用いた排気ガス浄化装置用フィルタの部分拡大断面図である。 2 is a partially enlarged cross-sectional view of the filter for the exhaust gas purification apparatus using the ceramic structural body of the present invention.

【図3】この発明にかかる排気ガス浄化装置用フィルタのセラミック部材を示す斜視図である。 3 is a perspective view showing a ceramic member of the filter for such an exhaust gas purification apparatus in the present invention.

【図4】図3のA−A線における一部破断拡大断面図である。 It is a partially cutaway enlarged sectional view taken along line A-A of FIG. 3. FIG.

【図5】図4のB−B線における拡大断面図である。 5 is an enlarged sectional view along the line B-B in FIG. 4.

【図6】接着強度の測定試験の説明図である。 6 is an explanatory view of a measurement test of adhesion strength.

【図7】熱伝導率の測定試験の説明図である。 7 is an explanatory view of a measurement test of thermal conductivity.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 排気ガス浄化装置用フィルタ 2,3 セラミック部材 4 シール材 5 断熱材 Filter for 1 exhaust gas purification device 2, 3 ceramic member 4 sealing member 5 insulation material

───────────────────────────────────────────────────── フロントページの続き (72)発明者 島戸 幸二 岐阜県揖斐郡揖斐川町北方1−1 イビ デン株式会社内 (72)発明者 岡添 弘 埼玉県上尾市大字壱丁目1番地 日産デ ィーゼル工業株式会社内 (72)発明者 岩広 政器 埼玉県上尾市大字壱丁目1番地 日産デ ィーゼル工業株式会社内 (56)参考文献 特開 平3−121213(JP,A) 特開 平6−9253(JP,A) 特開 平2−259190(JP,A) 実開 平6−47620(JP,U) 実開 平1−63715(JP,U) 特公 昭57−5429(JP,B2) 特公 昭51−43485(JP,B2) (58)調査した分野(Int.Cl. 7 ,DB名) F01N 3/02 301 B01D 39/20 C04B 37/00 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Koji Shimado Gifu Prefecture Ibi District ibigawa northern 1-1 Ibi den within Co., Ltd. (72) inventor Hiroshi Okazoe Saitama Prefecture Ageo Oaza Itchome address 1 Nissan diesel industrial stock within the company (72) inventor Masashi Iwahiro unit, Saitama Prefecture Ageo Oaza Itchome address 1 Nissan diesel in the industrial Co., Ltd. (56) reference Patent flat 3-121213 (JP, a) JP flat 6-9253 ( JP, A) Patent Rights 2-259190 (JP, A) JitsuHiraku flat 6-47620 (JP, U) JitsuHiraku flat 1-63715 (JP, U) Tokuoyake Akira 57-5429 (JP, B2) Tokuoyake Akira 51-43485 (JP, B2) (58 ) investigated the field (Int.Cl. 7, DB name) F01N 3/02 301 B01D 39/20 C04B 37/00

Claims (3)

    (57)【特許請求の範囲】 (57) [the claims]
  1. 【請求項1】 長手方向に沿って並列する複数の貫通孔を有し、かつ、これらの貫通孔の各端面は、それぞれ市松模様状に目封じされていると共に、ガスの入側と出側とでは開閉が逆の関係にあり、そして、これらの貫通孔の隣接するものどうしは、多孔質な隔壁を通じて互いに通気可能にしたセラミック部材を、複数個結束させて集合体としたセラミック構造体において、 前記各セラミック部材の相互間に、少なくとも無機繊維、無機バインダー、有機バインダーおよび無機粒子からなるものを充填し、乾燥し、硬化して、前記無機繊維と、無機粒子と、無機バインダーの加熱焼成によって生成するセラミックスとが、三次元的に交錯する構造の弾性質シール材を形造り、そのシール材を介して前記各セラミック部材一体に接着されてお [Claim 1 further comprising a plurality of through-holes arranged in parallel along the longitudinal direction, and the end faces of the through holes, along with being sealed to each a checkered pattern, and inlet side of the gas exit side have a relationship closing the opposite is the, and, adjacent ones each other of these through holes, the ceramic member to allow venting each other through porous partition walls, in the ceramic structure was an aggregate by a plurality bundling the therebetween of each ceramic member, at least an inorganic fiber, an inorganic binder, filling one made of organic binder and inorganic particles, dried and cured, and the inorganic fibers, inorganic particles, heating and firing the inorganic binder and the ceramics produced by us form building the elastic membrane sealing material three-dimensionally interlaced structures, said each ceramic member through the sealing member is bonded together 、とくに前記無機 , In particular the inorganic
    粒子として、炭化珪素、窒化珪素、および窒化硼素から As particles, silicon carbide, silicon nitride, and boron nitride
    選ばれる少なくとも1種以上の無機粉末またはウィスカ At least one kind of inorganic powder or whisker selected
    ーを用いることを特徴とするセラミック構造体。 Ceramic structure, which comprises using a chromatography.
  2. 【請求項2】 前記シール材において 、無機繊維として 2. A the sealing material, the inorganic fibers
    、シリカ−アルミナ、ムライト、アルミナおよびシリカから選ばれる少なくとも1種以上のセラミックファイバーを用い、無機バインダーとしては、シリカゾルおよびアルミナゾルから選ばれる少なくとも1種以上のコロイダルゾルを用い、 そして有機バインダーとしては、ポリビニルアルコール、メチルセルロース、エチルセルロースおよびカルボメトキシセルロースから選ばれる少なくとも1種以上の多糖類を用いることを特徴とする請求項1に記載のセラミック構造体。 The silica - alumina, mullite, using at least one or more ceramic fibers selected from alumina and silica, the inorganic binder, using at least one or more kinds of colloidal sol selected from silica sol and alumina sol, and the organic binder , polyvinyl alcohol, methyl cellulose, ceramic structure according to claim 1, characterized in that there use at least one kind of polysaccharide selected from ethyl cellulose and carbomethoxy cellulose.
  3. 【請求項3】 前記シール材は、固形分で、10〜70wt% Wherein said sealing material is a solid, 10 to 70 weight%
    のシリカ−アルミナセラミックファイバー、1〜30wt% Silica - alumina ceramic fiber, 1-30 wt%
    のシリカゾル、0.1 〜5.0 wt%のカルボメトキシセルロースおよび3〜80wt%の炭化珪素粉末からなることを特徴とする請求項2に記載のセラミック構造体。 Silica sol, ceramic structure according to claim 2, characterized in that it consists of 0.1 to 5.0 wt% of carbomethoxy cellulose and 3~80Wt% of silicon carbide powder.
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