JP3380280B2 - Metal carrier for exhaust gas purification catalyst - Google Patents
Metal carrier for exhaust gas purification catalystInfo
- Publication number
- JP3380280B2 JP3380280B2 JP02828693A JP2828693A JP3380280B2 JP 3380280 B2 JP3380280 B2 JP 3380280B2 JP 02828693 A JP02828693 A JP 02828693A JP 2828693 A JP2828693 A JP 2828693A JP 3380280 B2 JP3380280 B2 JP 3380280B2
- Authority
- JP
- Japan
- Prior art keywords
- foil
- oxide
- metal carrier
- corrugated
- exhaust gas
- 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 - Fee Related
Links
- 229910052751 metal Inorganic materials 0.000 title claims description 32
- 239000002184 metal Substances 0.000 title claims description 32
- 239000003054 catalyst Substances 0.000 title claims description 8
- 238000000746 purification Methods 0.000 title claims 2
- 239000011888 foil Substances 0.000 claims description 83
- 238000002844 melting Methods 0.000 claims description 20
- 230000008018 melting Effects 0.000 claims description 20
- 229910001220 stainless steel Inorganic materials 0.000 description 23
- 239000010935 stainless steel Substances 0.000 description 23
- 238000000034 method Methods 0.000 description 15
- 238000005304 joining Methods 0.000 description 13
- 238000005219 brazing Methods 0.000 description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 7
- 229910004298 SiO 2 Inorganic materials 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000000969 carrier Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は自動車などに用いられる
排ガス浄化触媒用メタル担体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal carrier for an exhaust gas purifying catalyst used in automobiles and the like.
【０００２】[0002]
【従来の技術】ステンレス平箔と波付け加工されたステ
ンレス波箔を積層するか、あるいは巻き重ねた（この積
層及び巻き重ねを総称して以下積層という）ハニカム構
造体からなる排ガス浄化触媒用メタル担体（以下、単に
メタル担体という）はその構造を維持するため平箔と波
箔が接触部において接合されている。2. Description of the Related Art A metal for an exhaust gas purifying catalyst comprising a honeycomb structure in which a flat stainless steel foil and a corrugated stainless corrugated foil are laminated or rolled up (this lamination and winding up are collectively referred to as a lamination) In order to maintain the structure of the carrier (hereinafter, simply referred to as a metal carrier), the flat foil and the corrugated foil are joined at the contact portion.
【０００３】メタル担体の接合方法としては種々の方法
が提案されているが、最も実用的に用いられている方法
はろう付け法である。メタル担体は高い耐熱性を必要と
するためろう材としてはニッケルろうを用いる。真空雰
囲気下でニッケルろう付けする方法はステンレスの接合
法として確立された常套的な手法であり、それなりの信
頼性のある接合方法である。しかし信頼性の高いろう付
けを行うには１０-2Ｐａ以下という高度の真空度を保持
できる高価な真空電気炉を必要とし、加えて真空電気炉
はバッチ式炉であるため生産性が低く多数の真空電気炉
を必要とする。この結果ろう付けメタル担体は製造設備
の投資費用が多大となるため製造コストが高いという問
題点を有する。Various methods have been proposed for joining metal carriers, but the most practical method is brazing. Since a metal carrier requires high heat resistance, nickel brazing is used as the brazing material. The method of nickel brazing in a vacuum atmosphere is a conventional method established as a stainless steel joining method and is a reliable joining method. However, in order to perform reliable brazing, an expensive vacuum electric furnace capable of maintaining a high degree of vacuum of 10 -2 Pa or less is required. In addition, since the vacuum electric furnace is a batch type furnace, the productivity is low and many. Need a vacuum electric furnace. As a result, the brazed metal carrier has a problem that the manufacturing cost is high because the investment cost of the manufacturing equipment becomes large.
【０００４】また、特開平１−２１８６３６号に示され
るようにステンレス平箔と波箔を拡散接合する方法も提
案されている。しかし一般に拡散接合法も信頼性の高い
接合を行うには、ろう付け法と同様の高度の真空雰囲気
を必要とするためやはり製造コストが高くなるという問
題点を有する。Further, as disclosed in Japanese Patent Application Laid-Open No. 1-218636, a method of diffusion-bonding a stainless flat foil and a corrugated foil has been proposed. However, in general, the diffusion bonding method also has a problem that the manufacturing cost becomes high because a high-level vacuum atmosphere similar to the brazing method is required to perform highly reliable bonding.
【０００５】さらに、メタル担体成形後に大気中で熱処
理を行い生成するアルミナ酸化膜により平箔と波箔を接
合する酸化接合法が知られており、この方法の応用法と
してポリマー処理を施す方法（特開平２−２７７５５３
号）や不定形状態にある酸化膜によって接合する方法
（特開平３−１１４５４６号）などが提案されている。
これらのメタル担体は大気雰囲気中で接合できるため、
製造コストはろう付けメタル担体や拡散接合メタル担体
よりも低くなるというメリットがある。Further, an oxidation bonding method is known in which a flat foil and a corrugated foil are bonded to each other by an alumina oxide film formed by heat treatment in the air after molding a metal carrier, and a method of applying a polymer treatment as an application of this method ( JP-A-2-27753
No.) or a method of bonding with an oxide film in an amorphous state (Japanese Patent Laid-Open No. 3-114546).
Since these metal carriers can be bonded in the atmosphere,
The manufacturing cost is lower than that of the brazing metal carrier or the diffusion bonding metal carrier.
【０００６】しかし、アルミナの融点は２０４０℃と高
い一方、接合温度はステンレスの融点からの制約によっ
て１４００℃程度が上限であると考えられるので、アル
ミナ酸化膜による接合はアルミナの融点に比べて極めて
低い温度における固体状態での接合となる。このため接
合強度が低くばらつきも大きくなりやすい。また生成す
るアルミナの性状は、ステンレス組成や大気中熱処理温
度のばらつきなどによって変化するため接合強度も影響
を受けばらつきやすい。この結果は例えば自動車に搭載
し高温と振動を受けた場合、条件によってはハニカムセ
ルが排ガスの流れ方向にずれるというズレ現象となって
現れ、著しくメタル担体の信頼性を損なう。However, while the melting point of alumina is as high as 2040 ° C., the upper limit of the bonding temperature is about 1400 ° C. due to the restriction from the melting point of stainless steel. Therefore, the bonding by the alumina oxide film is extremely higher than the melting point of alumina. It will be a solid state bond at low temperatures. For this reason, the bonding strength is low and the variation tends to be large. In addition, the properties of the alumina produced vary with the composition of the stainless steel, variations in heat treatment temperature in the atmosphere, and the like, so that the bonding strength is also affected and tends to vary. As a result, for example, when mounted on an automobile and subjected to high temperature and vibration, a honeycomb cell shifts in the flow direction of the exhaust gas depending on the conditions, which causes a deviation phenomenon, which significantly impairs the reliability of the metal carrier.
【０００７】メタル担体用のステンレス箔は高度の高温
耐酸化性が要求されるため、通常微量希土類元素を含む
Ｆｅ−２０Ｃｒ−５Ａｌステンレス箔が用いられるが、
このステンレスは一般のステンレスに比べ耐酸化性に優
れるが高価であるという欠点がある。またアルミナ酸化
膜による接合を行うにはアルミニュームを含有する上記
組成のステンレス箔（特開平３−１１４５４６号）を用
いるかあるいはアルミニュームを表面被覆したステンレ
ス箔を用いることが前提となるが、これらはいずれもコ
スト高の要因となる。Since a high-temperature oxidation resistance is required for a stainless steel foil for a metal carrier, an Fe-20Cr-5Al stainless steel foil containing a trace amount of rare earth element is usually used.
This stainless steel is superior in oxidation resistance to general stainless steel, but has the drawback of being expensive. In addition, it is premised that a stainless steel foil having the above composition containing aluminum (Japanese Patent Laid-Open No. 3-114546) containing aluminum or a stainless steel foil coated with aluminum is used for bonding with an alumina oxide film. Any of these causes high cost.
【０００８】[0008]
【発明が解決しようとする課題】本発明は自動車などに
用いられる排ガス浄化触媒用メタル担体における従来技
術の持つ問題点を解決するものである。すなわちろう付
けメタル担体や拡散接合メタル担体が有するコストが高
いという問題点、アルミナ酸化膜によって接合されたメ
タル担体が有する接合強度が低くばらつきが大きいこと
に起因する信頼性が低いという問題点、さらには高価な
ステンレス箔を用いなければならないという問題点を解
決し、低コストかつ信頼性の高いメタル担体を提供する
ことを課題とするものである。SUMMARY OF THE INVENTION The present invention solves the problems of the prior art in the metal carrier for exhaust gas purifying catalyst used in automobiles and the like. That is, the problem that the brazing metal carrier or the diffusion bonding metal carrier has a high cost, the problem that the metal carrier bonded by the alumina oxide film has a low bonding strength and a large variation, and the reliability is low, Is to solve the problem that expensive stainless steel foil has to be used, and to provide a low-cost and highly reliable metal carrier.
【０００９】[0009]
【課題を解決するための手段】低コストかつ信頼性の高
いメタル担体を提供するため本発明は、ステンレス平箔
と波付け加工されたステンレス波箔を積層したハニカム
構造体からなる排ガス浄化触媒用メタル担体において、
前記ステンレス平箔と波箔が、融点が１０００℃以上か
つ１６００℃以下である酸化物を介して接合されてなる
ことを構成要件とする。さらにステンレス平箔と波箔の
全表面が酸化物で被覆されてなることを他の構成要件と
する。[MEANS FOR SOLVING THE PROBLEMS] To provide a low-cost and highly reliable metal carrier, the present invention is for an exhaust gas purifying catalyst comprising a honeycomb structure in which a flat stainless steel foil and a corrugated stainless corrugated foil are laminated. For metal carriers,
The constituent requirement is that the flat stainless steel foil and the corrugated foil are joined together via an oxide having a melting point of 1000 ° C. or higher and 1600 ° C. or lower. Another requirement is that the entire surface of the stainless flat foil and the corrugated foil is covered with an oxide.
【００１０】以下、本発明を詳細に説明する。本発明の
メタル担体におけるステンレス平箔と波箔の接合構造を
図１に示す。平箔１と波箔２の頂部とは酸化物３を介し
て接合されている。酸化物３を介する接合は種々の方法
をとり得るがその１例を述べる。まず粉末の酸化物をペ
ーストの形で波箔の頂部に塗布し、次いで平箔と積層し
てハニカム構造体としたのち接合のために加熱処理す
る。熱処理によって酸化物は溶融あるいは軟化して平箔
と波箔の頂部との間を埋め両者を接合する。この方法の
場合は平箔と波箔頂部の間には、図１に示すように酸化
物が介在することとなる。一方、平箔と波箔を積層した
のちに平箔と波箔頂部との接触部に粉末酸化物を散布す
る方法の場合には、平箔と波箔頂部との間には酸化物は
介在せず酸化物は周辺を埋めて接合する。The present invention will be described in detail below. FIG. 1 shows a joining structure of a stainless flat foil and a corrugated foil in the metal carrier of the present invention. The flat foil 1 and the top of the corrugated foil 2 are bonded via the oxide 3. Although various methods can be used for the bonding via the oxide 3, one example will be described. First, a powdered oxide is applied in the form of a paste to the top of a corrugated foil, and then laminated with a flat foil to form a honeycomb structure, and then heat-treated for bonding. The oxide is melted or softened by the heat treatment to fill the space between the flat foil and the top of the corrugated foil to bond them together. In the case of this method, an oxide is interposed between the flat foil and the corrugated foil top portion as shown in FIG. On the other hand, in the case of the method of spraying the powdered oxide on the contact portion between the flat foil and the corrugated foil after laminating the flat foil and the corrugated foil, the oxide is interposed between the flat foil and the corrugated foil top. Without it, the oxide fills the periphery and joins.
【００１１】ステンレス平箔と波箔の加熱処理接合時の
雰囲気は特に制限を受けないが、非酸化性雰囲気あるい
は真空雰囲気で接合する場合には、予め平箔と波箔の表
面に加熱酸化あるいは酸化物コーティングなどの事前処
理によって酸化物皮膜を形成させておく必要がある。大
気などの酸化雰囲気での接合の場合には接合中に酸化皮
膜が形成されるので事前の酸化物の皮膜形成はあって差
し支えないが、なくても接合は可能である。したがって
酸化雰囲気での接合は事前の酸化物皮膜形成の必要がな
いのでコスト的には最も有利である。The atmosphere for joining the stainless steel flat foil and the corrugated foil by heat treatment is not particularly limited, but when they are joined in a non-oxidizing atmosphere or a vacuum atmosphere, the surfaces of the flat foil and the corrugated foil are previously heated or oxidized. It is necessary to form an oxide film by pretreatment such as oxide coating. In the case of joining in an oxidizing atmosphere such as the air, an oxide film is formed during the joining, so there is no problem with forming an oxide film in advance, but joining is possible without it. Therefore, joining in an oxidizing atmosphere is most advantageous in terms of cost because it is not necessary to form an oxide film in advance.
【００１２】本発明の特徴を最大限活用する接合構造を
図２に示す。平箔１と波箔２の頂部とは酸化物３を介し
て接合されている点は図１と変わりはないが、酸化物３
が平箔１と波箔２の全表面を覆っている点で異なる。予
め平箔と波箔の表面に酸化物ペーストを塗布したのち積
層し加熱処理接合すると、平箔と波箔頂部の間には図２
に示すように酸化物が介在することとなる。一方、平箔
と波箔を積層したのちに酸化物ペーストあるいはゾル状
酸化物に浸漬して酸化物を塗布すると、平箔と波箔頂部
との間には酸化物は介在せず酸化物は周辺を埋めて接合
する。FIG. 2 shows a joint structure that makes the best use of the features of the present invention. Although the flat foil 1 and the top of the corrugated foil 2 are bonded via the oxide 3 as in the case of FIG.
Differs in that it covers the entire surface of the flat foil 1 and the corrugated foil 2. The oxide paste was applied on the surface of the flat foil and the corrugated foil in advance, and they were laminated and heat-bonded.
As shown in (3), the oxide will intervene. On the other hand, when the flat foil and the corrugated foil are laminated and then the oxide is applied by immersing it in an oxide paste or a sol-like oxide, no oxide is present between the flat foil and the corrugated foil top portion. Fill the periphery and join.
【００１３】図２の接合構造の利点は、ステンレス平箔
と波箔の全表面が酸化物で被覆されているので優れた高
温の耐酸化性を示す点にある。前述したようにメタル担
体用ステンレスとしては、通常高温耐酸化性を確保する
ために微量希土類元素を含むＦｅ−２０Ｃｒ−５Ａｌと
いう高価なステンレスが使用されるが、図２の接合形態
をとればステンレス自体には高温耐酸化性は要求されな
いから安価なステンレスの使用が可能となる。The advantage of the joining structure of FIG. 2 is that it exhibits excellent high temperature oxidation resistance because the entire surface of the stainless flat foil and the corrugated foil is covered with oxide. As described above, as the stainless steel for a metal carrier, an expensive stainless steel such as Fe-20Cr-5Al containing a trace amount of rare earth element is usually used to secure high temperature oxidation resistance. Since high temperature oxidation resistance is not required by itself, inexpensive stainless steel can be used.
【００１４】自動車用のメタル担体は使用条件によって
は局部的に８００〜１０００℃まで加熱される。したが
って平箔と波箔の接合用酸化物としては融点の低い酸化
物、例えば亜鉛あるいは鉛を多量に含有している低融点
ガラスは使用できない。自動車用ガソリンエンジンを用
いたメタル担体の耐久性試験の結果、酸化物の融点が１
０００℃以上であればハニカムセルのズレ現象は現れず
必要な耐久性の得られることが判明した。The metal carrier for automobiles is locally heated to 800 to 1000 ° C. depending on use conditions. Therefore, an oxide having a low melting point, for example, a low melting point glass containing a large amount of zinc or lead cannot be used as an oxide for joining the flat foil and the corrugated foil. As a result of the durability test of the metal carrier using an automobile gasoline engine, the melting point of the oxide is 1
It was found that at a temperature of 000 ° C. or higher, the honeycomb cell displacement phenomenon did not appear and the required durability was obtained.
【００１５】またエンジン試験では運転と停止を繰り返
すのでメタル担体は繰り返し熱サイクルを受ける。熱サ
イクルによって接合部が破壊するとハニカムセルのズレ
現象が現れる。このエンジン試験における室温と８００
〜１０００℃の熱サイクルに耐えるためには、酸化物の
融点を１６００℃以下にする必要のあることが判った。
酸化物の融点が１６００℃以下であれば、ステンレスと
酸化物の熱膨張率の違いから生ずる応力を酸化物の変形
によって吸収できるが、融点が１６００℃を超えると酸
化物の変形能が不十分であるため熱サイクルによって接
合部が破壊しやすくなり、したがってハニカムセルのズ
レが起こりやすくなると考えられる。Further, in the engine test, since the operation and the stop are repeated, the metal carrier is repeatedly subjected to the heat cycle. When the bonded portion is broken by the thermal cycle, the honeycomb cell shift phenomenon appears. Room temperature and 800 in this engine test
It has been found that the melting point of the oxide needs to be 1600 ° C. or lower in order to withstand a heat cycle of up to 1000 ° C.
If the melting point of the oxide is 1600 ° C or lower, the stress caused by the difference in thermal expansion coefficient between stainless steel and the oxide can be absorbed by the deformation of the oxide, but if the melting point exceeds 1600 ° C, the deformability of the oxide is insufficient. Therefore, it is considered that the bonded portion is easily broken by the heat cycle, and thus the honeycomb cell is likely to be displaced.
【００１６】前記特性を満たす酸化物の例としては、Ａ
ｌ2 Ｏ3 −ＳｉＯ2 系、ＭｇＯ−ＳｉＯ2 系、Ａｌ2 Ｏ
3 −ＭｇＯ系、Ａｌ2 Ｏ3 −ＣａＯ系、ＣａＯ−ＳｉＯ
2 系、ＭｎＯ−ＳｉＯ2 系、Ａｌ2 Ｏ3 −ＣａＯ−Ｓｉ
Ｏ2 系、ＭｇＯ−Ａｌ2 Ｏ3−ＳｉＯ2 系、ＢａＯ−Ａ
ｌ2 Ｏ3 −ＳｉＯ2 系、Ａｌ2 Ｏ3 −ＭｎＯ−ＳｉＯ2
系等の酸化物をベースにして、Ｂ2 Ｏ3 などの酸化物を
融点調節のために添加するものが挙げられる。ただし、
これ以外のものでも融点範囲１０００〜１６００℃を満
たしているものであれば使用できる。As an example of the oxide satisfying the above characteristics, A
l 2 O 3 —SiO 2 system, MgO—SiO 2 system, Al 2 O
3 -MgO system, Al 2 O 3 -CaO based, CaO-SiO
2 system, MnO-SiO 2 system, Al 2 O 3 -CaO-Si
O 2 system, MgO-Al 2 O 3 -SiO 2 system, BaO-A
l 2 O 3 -SiO 2 system, Al 2 O 3 -MnO-SiO 2
An example is one in which an oxide such as B 2 O 3 is added for adjusting the melting point based on an oxide such as a system. However,
Other materials can be used as long as they satisfy the melting point range of 1000 to 1600 ° C.
【００１７】[0017]
【作用】本発明は、ステンレス平箔と波箔を積層したハ
ニカム構造体からなるメタル担体において、ステンレス
平箔と波箔を融点が１０００℃以上かつ１６００℃以下
である酸化物を介して接合することにより、低コストか
つ信頼性の高いメタル担体を提供する。According to the present invention, in a metal carrier composed of a honeycomb structure in which a stainless flat foil and a corrugated foil are laminated, the stainless flat foil and the corrugated foil are bonded together through an oxide having a melting point of 1000 ° C or more and 1600 ° C or less. As a result, a low cost and highly reliable metal carrier is provided.
【００１８】[0018]
実施例１
ステンレス箔としては微量希土類元素を含むＦｅ−２０
Ｃｒ−５Ａｌステンレスの厚さ５０μｍの平箔と波箔
を、酸化物としては１０Ａｌ2 Ｏ3 −４０ＳｉＯ2 −４
０ＭｎＯ（融点１１７０℃）の微粉末を有機ビークルに
よって混練したペーストを用いた。ペーストをステンレ
ス波箔の頂部に塗布し、次いで平箔と積層してハニカム
構造体としたのち、大気雰囲気中１２５０℃で３０分間
加熱処理し、接合した。これを自動車用ガソリンエンジ
ンの排ガス側につなぎエンジン試験に供した。室温と８
５０℃間の熱サイクルを９００回かけたが、ハニカムセ
ルにズレは見られず実用上十分な耐久性を示した。Example 1 As a stainless steel foil, Fe-20 containing a trace amount of rare earth element
Cr-5Al stainless steel flat foil and corrugated foil having a thickness of 50 μm were used as oxides, and 10Al 2 O 3 -40SiO 2 -4 was used as an oxide.
A paste prepared by kneading 0 MnO (melting point 1170 ° C.) fine powder with an organic vehicle was used. The paste was applied on the top of a stainless corrugated foil, and then laminated with a flat foil to form a honeycomb structure, which was then heat treated at 1250 ° C. for 30 minutes in the air atmosphere to bond them. This was connected to the exhaust gas side of an automobile gasoline engine and subjected to an engine test. Room temperature and 8
A thermal cycle of 50 ° C. was applied 900 times, but no deviation was found in the honeycomb cells, and practically sufficient durability was exhibited.
【００１９】実施例２
実施例１において酸化物を４８ＣａＯ−５２ＳｉＯ
2 （融点１５４０℃）に替えて、１４００℃で３０分間
加熱処理し、接合した。これをエンジン試験にかけた
が、ハニカムセルにズレは見られず実用上十分な耐久性
を示した。Example 2 The oxide used in Example 1 was 48CaO-52SiO.
2 (melting point 1540 ° C.), and heat treatment was performed at 1400 ° C. for 30 minutes to bond. When this was subjected to an engine test, no deviation was observed in the honeycomb cell and it showed sufficient durability for practical use.
【００２０】実施例３
ステンレス箔はＦｅ−１７Ｃｒステンレスの厚さ５０μ
ｍの平箔と波箔を用いた。酸化物は１０Ａｌ2 Ｏ3 −４
０ＳｉＯ2 −４０ＭｎＯ（融点１１７０℃）の微粉末を
低濃度のスラリー状に混練して用いた。平箔と波箔を積
層してハニカム構造体とし、次いでスラリー中に浸漬し
て平箔と波箔の全表面に酸化物微粉を塗布したのち、大
気雰囲気中１２５０℃で３０分間加熱処理し、接合し
た。これをエンジン試験に供したが、箔の異常酸化、ハ
ニカムセルの破壊、ハニカムセルのズレなどは見られず
実用上十分な耐久性を示した。本発明によればステンレ
ス箔として高価な微量希土類元素を含むＦｅ−２０Ｃｒ
−５Ａｌに替えてより安価なＦｅ−１７Ｃｒも使用し得
る。Example 3 The stainless steel foil was made of Fe-17Cr stainless steel having a thickness of 50 μm.
m flat foil and corrugated foil were used. The oxide is 10Al 2 O 3 -4
A fine powder of 0SiO 2 -40MnO (melting point 1170 ° C.) was kneaded into a low-concentration slurry and used. A flat foil and a corrugated foil are laminated to form a honeycomb structure, which is then immersed in a slurry to apply fine oxide powder on the entire surface of the flat foil and the corrugated foil, and then heat-treated in an air atmosphere at 1250 ° C. for 30 minutes, Joined. When this was subjected to an engine test, abnormal durability of the foil, destruction of the honeycomb cell, displacement of the honeycomb cell, etc. were not observed, and the durability was practically sufficient. According to the present invention, Fe-20Cr containing a trace amount of rare earth element which is expensive as a stainless steel foil
Fe-17Cr, which is cheaper, can be used instead of -5Al.
【００２１】比較例１
酸化物として６０ＰｂＯ−２０Ｂ2 Ｏ3 −２０ＳｉＯ2
（融点約８００℃）を用いて実施例１と同様の方法で８
５０℃で３０分間加熱処理し、接合した。これをエンジ
ン試験にかけたところ熱サイクル約２０回目でハニカム
セルにズレが発生した。[0021] 60PbO-20B 2 O 3 -20SiO 2 Comparative Example 1 oxide
(Melting point of about 800 ° C.) 8 in the same manner as in Example 1
It heat-processed at 50 degreeC for 30 minute (s), and joined. When this was subjected to an engine test, deviation occurred in the honeycomb cell at the 20th thermal cycle.
【００２２】比較例２
酸化物として１ＣａＯ−９９ＳｉＯ2 （融点１７０５
℃）を用いて実施例１と同様の方法で１４００℃で３０
分間加熱処理し、接合した。これをエンジン試験にかけ
たところ熱サイクル約１００回目でハニカムセルにズレ
が発生した。Comparative Example 2 1CaO-99SiO 2 (melting point 1705 as an oxide
30 ° C. at 1400 ° C. in the same manner as in Example 1
It heat-processed for a minute and joined. When this was subjected to an engine test, deviation occurred in the honeycomb cell at the 100th thermal cycle.
【００２３】比較例３
酸化物としてＡｌ2 Ｏ3 微粉を用いて実施例１と同様の
方法で１４００℃で３０分間加熱処理し、接合した。こ
れをエンジン試験にかけたところ初期の段階でハニカム
セルにズレが発生した。ハニカムセルのズレは加熱処理
温度に比べてＡｌ2 Ｏ3 の融点が高すぎるため接合その
ものが不十分となり、ハニカムセルの接合温度が低いた
めに起こる。Comparative Example 3 Al 2 O 3 fine powder was used as an oxide and heat-treated at 1400 ° C. for 30 minutes in the same manner as in Example 1 to bond them. When this was subjected to an engine test, the honeycomb cell was misaligned in the initial stage. The deviation of the honeycomb cells occurs because the melting point of Al 2 O 3 is too high as compared with the heat treatment temperature so that the bonding itself becomes insufficient and the bonding temperature of the honeycomb cells is low.
【００２４】[0024]
【発明の効果】本発明によると、メタル担体における従
来技術の持つ問題点を解決し、低コストかつ信頼性の高
いメタル担体の提供が容易になるという効果がある。According to the present invention, it is possible to solve the problems of the prior art of metal carriers and to easily provide a metal carrier of low cost and high reliability.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明のステンレス平箔と波箔の接合構造図例FIG. 1 is an example of a joining structure diagram of a stainless flat foil and a corrugated foil of the present invention.
【図２】本発明のステンレス平箔と波箔の接合構造図例[Fig. 2] Example of a joining structure diagram of a stainless flat foil and a corrugated foil of the present invention
【符号の説明】 １ 平箔 ２ 波箔 ３ 酸化物[Explanation of symbols] 1 flat foil 2 wave foil 3 oxides
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B01J 21/00 - 37/36 B01D 53/86 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) B01J 21/00-37/36 B01D 53/86
Claims (2)
ンレス波箔を積層するかまたは巻き重ねたハニカム構造
体からなる排ガス浄化触媒用メタル担体において、前記
ステンレス平箔と波箔が、融点が１０００℃以上かつ１
６００℃以下である酸化物を介して接合されていること
を特徴とする排ガス浄化触媒用メタル担体。1. A metal carrier for an exhaust gas purifying catalyst comprising a honeycomb structure in which a stainless flat foil and a corrugated stainless corrugated foil are laminated or rolled up, and the melting point of the stainless flat foil and the corrugated foil is 1000. ℃ or more and 1
A metal carrier for an exhaust gas purifying catalyst, which is bonded through an oxide having a temperature of 600 ° C. or lower.
で被覆されていることを特徴とする請求項１記載の排ガ
ス浄化触媒用メタル担体。2. The metal carrier for an exhaust gas purification catalyst according to claim 1, wherein the entire surfaces of the stainless flat foil and the corrugated foil are coated with an oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02828693A JP3380280B2 (en) | 1993-02-17 | 1993-02-17 | Metal carrier for exhaust gas purification catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02828693A JP3380280B2 (en) | 1993-02-17 | 1993-02-17 | Metal carrier for exhaust gas purification catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06238171A JPH06238171A (en) | 1994-08-30 |
| JP3380280B2 true JP3380280B2 (en) | 2003-02-24 |
Family
ID=12244371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02828693A Expired - Fee Related JP3380280B2 (en) | 1993-02-17 | 1993-02-17 | Metal carrier for exhaust gas purification catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3380280B2 (en) |
-
1993
- 1993-02-17 JP JP02828693A patent/JP3380280B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06238171A (en) | 1994-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6344942A (en) | Preparation of catalyst substrate for automobile exhaust gas purifying device | |
| KR100426384B1 (en) | Layered sheet metal with rolled-on solder and process for manufacturing a honeycombed body therefrom | |
| EP0348576A2 (en) | Catalyst carriers and a process for producing the same | |
| KR970703218A (en) | PROCESS FOR SOLDERING METAL STRUCTURES WITH A BONDING MATERIAL COMPRISING DIFFERENT STATES | |
| EP0653264A1 (en) | Method of soldering heat resisting alloy having insulating oxide film on its surface, and preheated type exhaust gas cleaning metal support and method of manufacturing the same | |
| KR100688007B1 (en) | Method for producing a sintered honeycomb | |
| JP3380280B2 (en) | Metal carrier for exhaust gas purification catalyst | |
| JPH0459935B2 (en) | ||
| JP3268817B2 (en) | Metal carrier for automobile exhaust gas purification catalyst | |
| JP3318470B2 (en) | Method of brazing metal foil and honeycomb body | |
| JPS62234553A (en) | Production of metallic carrier base body for exhaust gas purifying catalyst | |
| JPH046172A (en) | Composite foil brazing material for joining ceramics | |
| JPH07108334A (en) | Production of metallic carrier | |
| JPS62269750A (en) | Catalyst carrier | |
| JP2590023Y2 (en) | Metal carrier | |
| JP3288440B2 (en) | Joining method and joined body of heat-resistant alloy containing Al | |
| JP3235633B2 (en) | Method for producing metal catalyst carrier | |
| JP3798872B2 (en) | Method for producing metal catalyst carrier | |
| JPH046174A (en) | Composite foil brazing material for joining ceramics | |
| JP3079218B2 (en) | Method for producing metal catalyst carrier | |
| JPS61117172A (en) | Ceramic bonding structure | |
| JPH05168945A (en) | Manufacture of metal catalyst carrier | |
| JP3287364B2 (en) | Method for producing metal catalyst carrier | |
| JPH02187151A (en) | Production of metallic carrier | |
| JPH046171A (en) | Composite foil brazing material for joining ceramics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20021105 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R360 | Written notification for declining of transfer of rights |
Free format text: JAPANESE INTERMEDIATE CODE: R360 |
|
| R371 | Transfer withdrawn |
Free format text: JAPANESE INTERMEDIATE CODE: R371 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071213 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081213 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081213 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091213 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091213 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101213 Year of fee payment: 8 |
|
| LAPS | Cancellation because of no payment of annual fees |