JP2011147855A - Electrically heating catalyst device and method for producing the same - Google Patents

Electrically heating catalyst device and method for producing the same Download PDF

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JP2011147855A
JP2011147855A JP2010009566A JP2010009566A JP2011147855A JP 2011147855 A JP2011147855 A JP 2011147855A JP 2010009566 A JP2010009566 A JP 2010009566A JP 2010009566 A JP2010009566 A JP 2010009566A JP 2011147855 A JP2011147855 A JP 2011147855A
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flat plate
metal catalyst
catalyst carrier
electrode
corrugated
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JP5443182B2 (en
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Yasuhiro Mita
裕弘 三田
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Marelli Corp
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Calsonic Kansei Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To facilitate reduction work of the number of times of heating in manufacturing of a metallic catalytic carrier of an electrically heating catalytic device for cleaning exhaust gas from an internal-combustion engine. <P>SOLUTION: The metallic catalytic carrier 4 is produced by forming an aluminum layer in advance on the surface of a stainless steel foil material for a corrugated sheet 2 or a flat sheet 3 at the least, winding the corrugated sheet and the flat sheet around a central electrode 5, and then heating the obtained wound body in an oxidative atmosphere, so that the aluminum layer is modified into aluminum oxide and the corrugated sheet is joined oxidatively to the flat sheet to form an electrical insulating layer. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、内燃機関の排気ガス浄化のための触媒装置の構造に関する。   The present invention relates to the structure of a catalyst device for purifying exhaust gas of an internal combustion engine.

従来、自動車では駆動用内燃機関から排出される排気ガスを浄化するため、アルミニウム含有ステンレス材からなる箔を波板と平板に加工したものを重ね合わせて、巻回してハニカム状に形成して、波板と平板相互を接合した金属触媒担体に触媒を担持させたものを、排気ガス通路に配置している。浄化作用を起こさせるためには金属触媒担体に担持された触媒が活性化する温度（３００℃〜４００℃）である必要がある。そこで内燃機関の始動直後から触媒が活性化するように、金属触媒担体に通電し金属触媒担体自身の発熱作用により触媒活性化温度まで短時間で達するようにした電気加熱式の触媒装置が提案されている。   Conventionally, in order to purify exhaust gas exhausted from a driving internal combustion engine in an automobile, a foil made of an aluminum-containing stainless steel is laminated into a corrugated plate and a flat plate, wound and formed into a honeycomb shape, A catalyst supported on a metal catalyst carrier in which corrugated plates and flat plates are joined to each other is disposed in the exhaust gas passage. In order to cause the purification action, it is necessary to be at a temperature (300 ° C. to 400 ° C.) at which the catalyst supported on the metal catalyst carrier is activated. Therefore, an electrically heated catalyst device has been proposed in which the metal catalyst carrier is energized to reach the catalyst activation temperature in a short time due to the exothermic action of the metal catalyst carrier itself so that the catalyst is activated immediately after the start of the internal combustion engine. ing.

特開平１１−１７９１５７JP-A-11-179157

しかしながら、通電して発熱させるためには途中でショートせずに通電回路が確立されていることが必要となる。金属触媒担体は導電性を有するステンレス材からなるので、波板と平板間を電気的に絶縁する必要がある。そこで、箔材のときに大気雰囲気の炉中で過熱し酸化皮膜等を形成し、波板および平板に絶縁皮膜を形成して置いてこれらを、重ねて巻回し、ロウ材やセラミック接着剤等により波板と平板間を接合固定している。従って、担体は酸化皮膜形成時と接合時に加熱炉において二度加熱しなければならない問題がある。加熱、冷却を繰り返すためそれぞれの工程にて時間を要すると共の、炉からの出し入れなど多工数を要する   However, in order to generate heat by energization, it is necessary to establish an energization circuit without causing a short circuit. Since the metal catalyst carrier is made of a stainless steel material having conductivity, it is necessary to electrically insulate between the corrugated plate and the flat plate. Therefore, when it is a foil material, it is heated in a furnace in an atmospheric atmosphere to form an oxide film, etc., and an insulating film is formed on the corrugated plate and flat plate, and these are wound up in layers, brazing material, ceramic adhesive, etc. The corrugated plate and the flat plate are joined and fixed by the above. Therefore, there is a problem that the carrier must be heated twice in a heating furnace at the time of forming the oxide film and joining. It takes time in each process to repeat heating and cooling, and requires many man-hours such as taking in and out of the furnace.

本発明は、このような従来技術の技術的課題に鑑みてなされたもので、金属触媒担体１２の加熱回数を減らし製造作業の短縮と容易化をすることを目的とする。   The present invention has been made in view of such technical problems of the prior art, and an object thereof is to reduce the number of heating times of the metal catalyst carrier 12 and shorten and facilitate the manufacturing operation.

本発明は、ステンレス箔からなる波板と平板を重ねて中心電極を中心にして巻回することにより形成した金属触媒担体を、外周に電極を取り付けた外筒内に圧入して前記外筒と前記金属触媒担体および前記中心電極を電気的に接続した電気加熱触媒装置において、前記金属触媒担体は少なくとも波板用又は平板用ステンレス箔材表面に予めアルミニウム層を形成させて、両者を重ねて巻回後に酸化雰囲気中において加熱することにより前記アルミニウム層を酸化アルミナに変性させると共に、前記波板と前記平板との接触部を酸化接合して形成するものである。   In the present invention, a metal catalyst carrier formed by overlapping a corrugated plate made of stainless steel foil and a flat plate and winding around a center electrode is press-fitted into an outer cylinder having an electrode attached to the outer periphery, and the outer cylinder and In the electrically heated catalyst device in which the metal catalyst carrier and the central electrode are electrically connected, the metal catalyst carrier is formed by forming an aluminum layer in advance on the surface of the stainless steel foil material for at least corrugated plate or flat plate, and winding both of them together. The aluminum layer is denatured into alumina oxide by heating in an oxidizing atmosphere after turning, and the contact portion between the corrugated plate and the flat plate is formed by oxidation bonding.

本発明によれば、ステンレス箔の波板と平板と中心電極および外筒電極の間の電気的接続と波板と平板の絶縁層および波板と平板の接触部を接合する事を一度の加熱により形成することができるので、製造作業が短時間で容易となるという効果がある。   According to the present invention, the electrical connection between the corrugated sheet and the flat plate of the stainless steel foil, the center electrode and the outer cylinder electrode, and the joining of the corrugated sheet and the insulating layer of the flat plate and the contact portion of the corrugated sheet and the flat plate are heated once. Therefore, there is an effect that the manufacturing operation becomes easy in a short time.

第１の実施形態の電気加熱触媒装置の全体を示す斜視図The perspective view which shows the whole electric heating catalyst apparatus of 1st Embodiment. 第１の実施形態の金属触媒担体の構造を示す部分断面図The fragmentary sectional view which shows the structure of the metal catalyst carrier of 1st Embodiment 第１の実形態の中心電極と波板と平板の接合部を示す斜視図The perspective view which shows the junction part of the center electrode of 1st form, a corrugated sheet, and a flat plate 第１の実施形態の実施例の中心電極と接合する波板と平板を示す説明図で ある。It is explanatory drawing which shows the corrugated sheet and flat plate joined to the center electrode of the Example of 1st Embodiment. 第２の実施形態のラスメタル状箔材の平面図Plan view of the lath metal foil material of the second embodiment

本発明の第１の実施形態に係わる電気加熱触媒装置１ついて図１乃至図４に基づいて説明する。   The electric heating catalyst device 1 according to the first embodiment of the present invention will be described with reference to FIGS.

図１は電気加熱触媒装置１の全体を示している。ステンレス箔からなる波板２と平板３を重ねて、中心電極５を芯として巻回した金属触媒担体１２とした後に、ステンレス板を円筒形に成形し両端部を突き合わせて溶接したものに外筒電極６を取り付けた外筒４内に圧入している。   FIG. 1 shows the entire electrically heated catalyst device 1. After the corrugated plate 2 and the flat plate 3 made of stainless steel foil are overlapped to form a metal catalyst carrier 12 wound with the center electrode 5 as a core, a stainless steel plate is formed into a cylindrical shape, both ends are butted and welded to an outer cylinder It press-fits in the outer cylinder 4 to which the electrode 6 is attached.

外筒４の軸方向前後には図示しない排気ガスを導くパイプが接続される。また、波板２と平板３の表面には、排気ガス浄化触媒がコーティングされており、パイプによって上流の内燃機関から排出された排気ガスが導かれて、排気ガス浄化触媒の働きにより浄化されて大気中に放出される。しかし、排気ガス浄化触媒は、活性温度以下では浄化性能が十分に発揮されないため、内燃機関始動後は速やかに活性化温度（３００℃〜４００℃）に達するように、始動前または始動直後に中心電極５と外筒電極６間に通電し、金属触媒担体１２による発熱作用を利用している。   A pipe (not shown) for guiding exhaust gas (not shown) is connected around the axial direction of the outer cylinder 4. Further, the surfaces of the corrugated plate 2 and the flat plate 3 are coated with an exhaust gas purification catalyst, and exhaust gas discharged from an upstream internal combustion engine is guided by a pipe and purified by the action of the exhaust gas purification catalyst. Released into the atmosphere. However, since the exhaust gas purification catalyst does not exhibit sufficient purification performance below the activation temperature, the exhaust gas purification catalyst is centered before or just after starting so that the activation temperature (300 ° C. to 400 ° C.) can be quickly reached after the internal combustion engine is started. Electricity is applied between the electrode 5 and the outer cylinder electrode 6, and the heat generation action by the metal catalyst carrier 12 is utilized.

通電し発熱させるためには、金属触媒担体１の波板２と平板３の間を電気的に絶縁して通電経路を確保したおく必要がある。図２に示すように本件電気加熱触媒装置１は、平板３となるステンレス箔材と波板２となるステンレス箔材の両面にアルミニウムをあらかじめ蒸着工程によりアルミニウム蒸着層７を形成している。最終の絶縁層が薄くても良い場合は平板３となるステンレス箔材のみにアルミニウム蒸着層７を設けて置けば良い。   In order to generate electricity and generate heat, it is necessary to electrically insulate between the corrugated plate 2 and the flat plate 3 of the metal catalyst carrier 1 to ensure an energization path. As shown in FIG. 2, in the present electrically heated catalyst device 1, an aluminum vapor deposition layer 7 is formed in advance on both surfaces of a stainless steel foil material to be a flat plate 3 and a stainless steel foil material to be a corrugated plate 2 by a vapor deposition process. When the final insulating layer may be thin, the aluminum vapor-deposited layer 7 may be provided only on the stainless steel foil material to be the flat plate 3.

図３に示すように、中心電極５にはスリット８が設けられており、波板２と平板３が両者の間にロウ材１０を挟んだ状態で挿入されている。この中心電極５のスリット８に挿入されている部分のアルミニウム蒸着層７は剥がされた剥離部９となっている。電気的絶縁層が形成されないようにしている。   As shown in FIG. 3, the center electrode 5 is provided with a slit 8, and the corrugated plate 2 and the flat plate 3 are inserted with a brazing material 10 sandwiched therebetween. A portion of the aluminum vapor-deposited layer 7 inserted into the slit 8 of the center electrode 5 is a peeled portion 9 that has been peeled off. An electrically insulating layer is prevented from being formed.

更に、図４に示すように、ロウ材１０が熔融して、波板２と平板３および中心電極５との電気的接続が同時に行われるように穴１１が設けられている。   Further, as shown in FIG. 4, holes 11 are provided so that the brazing material 10 is melted and the corrugated plate 2, the flat plate 3, and the center electrode 5 are electrically connected simultaneously.

最外周の外筒電極と接する部分もアルミニウム蒸着層７が剥がされロウ材がスポット溶接で取り付けられている。
次に、本実施形態の作用を説明する。 The aluminum vapor-deposited layer 7 is also peeled off at the part in contact with the outermost outer cylindrical electrode, and the brazing material is attached by spot welding.
Next, the operation of this embodiment will be described.

最初に、波板２と平板３となるステンレス箔には予めアルミニウムを蒸着によりコーティングしておく。   First, the stainless steel foil used as the corrugated plate 2 and the flat plate 3 is previously coated with aluminum by vapor deposition.

次に、ロール状に巻かれたステンレス箔材を図示しない波板製造装置によりステンレス箔材を波状に成形する。成形された波板２と平板３の巻き始めとなる部分のアルミニウム蒸着層を剥がすと共に箔状のロウ材１０を挟んで重ねると共にプレス機により穴１１を打ち抜く。そして、波板２と平板３およびロウ材１０の三者を重ねた状態で中心電極５のスリットに挿入すると共に、中心電極５を芯として必要回転させることで中心電極５の周りに波板２と平板３により排気ガス通路を設けた金属触媒担体１２を造る。巻き回数を制御することにより必要な直径の金属触媒担体１２が造られる。   Next, the stainless foil material wound into a roll shape is formed into a corrugated shape using a corrugated sheet manufacturing apparatus (not shown). The aluminum vapor deposition layer at the beginning of winding of the formed corrugated sheet 2 and flat plate 3 is peeled off, and the foil-like brazing material 10 is sandwiched and stacked, and the hole 11 is punched out by a press machine. Then, the corrugated plate 2, the flat plate 3, and the brazing material 10 are inserted into the slit of the center electrode 5 in a state where the corrugated plate 2, the flat plate 3, and the brazing material 10 are overlapped. The metal catalyst carrier 12 provided with the exhaust gas passage is formed by the flat plate 3. By controlling the number of windings, the metal catalyst carrier 12 having a required diameter is produced.

最外周となる波板２と平板３の最終端部も前記巻き始め部と同様に蒸着層を剥がしロール材から切断すると共にロウ材と一緒にスポット溶接等で固定する。ロウ材を巻回して外筒電極と電気的通路を形成するようにしても良い。   The corrugated plate 2 and the final end of the flat plate 3 which are the outermost periphery are also peeled off from the roll material and cut together with the brazing material by spot welding or the like, in the same manner as the winding start portion. A brazing material may be wound to form the outer cylinder electrode and the electrical passage.

その後、金属触媒担体１２はステンレス板を円形に成形し両端部を突き合わせて溶接した外筒４の外筒電極６の位置に一致するようにして圧入する。   Thereafter, the metal catalyst carrier 12 is press-fitted so as to coincide with the position of the outer cylinder electrode 6 of the outer cylinder 4 in which the stainless steel plate is formed into a circular shape and both end portions are butted and welded.

外筒４に圧入されて、波板２と平板３の接触部に加圧力が掛かった金属触媒担体１２を酸化雰囲気の炉中においてウイスカー生成温度（７００℃〜９００℃）以上で保持時間３０分程度の加熱処理を行う。この加熱処理により、雰囲気中の酸素がアルミニウムに三次元的に拡散侵入する。波板２と平板３の表面にコーティングされたアルミニウムは絶縁破壊電圧１０ＫＶ/ｍｍ〜１５ＫＶ/ｍｍの高電気絶縁性を有する酸化アルミナ（Ａｌ２Ｏ３）へと変性すると共に、蒸着層の剥がされた部分以外の両板の接触点および外筒４との接触点において酸化接合が行われる。これにより、波板２と平板３の接触点は絶縁皮膜の形成と同時に波板２と平板３の接合が行われて金属触媒担体１２が強固なものになる。 The metal catalyst carrier 12, which is press-fitted into the outer cylinder 4 and applied pressure to the contact portion between the corrugated plate 2 and the flat plate 3, is held in a furnace in an oxidizing atmosphere at a whisker generation temperature (700 ° C. to 900 ° C.) or higher for a holding time of 30 minutes Heat treatment to the extent. By this heat treatment, oxygen in the atmosphere diffuses and penetrates into aluminum three-dimensionally. The aluminum coated on the surfaces of the corrugated plate 2 and the flat plate 3 is denatured into alumina oxide (Al 2 O 3 ) having high electrical insulation with a dielectric breakdown voltage of 10 KV / mm to 15 KV / mm, and the deposited layer is peeled off. Oxidation bonding is performed at the contact points of both plates and the contact points with the outer cylinder 4 other than the portions. Thereby, the contact point between the corrugated plate 2 and the flat plate 3 is joined to the corrugated plate 2 and the flat plate 3 simultaneously with the formation of the insulating film, and the metal catalyst carrier 12 becomes strong.

この加熱処理により、中心電極５のスリット８に挿入されたロウ材１０と金属触媒担体１２外周に置かれたロウ材がそれぞれの場所で溶融して、波板２と平板３と中心電極５および外筒電極４との電気的接続が同時に行われる。特に中心電極５のスリット８に挿入された波板２と平板３には穴が設けられているため、溶融したロウ材は毛細管現象により、波板２と平板３の接合部から中心電極５とそれぞれの板との接触している面に広がり接合が行われる。このようにして、一度の加熱処理により、電気加熱触媒装置１が作られる。製造作業が容易となるという効果がある。   By this heat treatment, the brazing material 10 inserted into the slit 8 of the center electrode 5 and the brazing material placed on the outer periphery of the metal catalyst carrier 12 are melted at the respective locations, and the corrugated plate 2, the flat plate 3, the central electrode 5, Electrical connection with the outer cylinder electrode 4 is performed simultaneously. In particular, since the corrugated plate 2 and the flat plate 3 inserted in the slit 8 of the central electrode 5 are provided with holes, the molten brazing material is connected to the central electrode 5 and the center electrode 5 from the junction of the corrugated plate 2 and the flat plate 3 by capillary action. Spreading and joining are performed on the surfaces in contact with the respective plates. In this way, the electrically heated catalyst device 1 is made by a single heat treatment. There is an effect that the manufacturing operation becomes easy.

外筒電極６との電気的接続はこの加熱処理とは別に行うことも出来る。   The electrical connection with the outer cylinder electrode 6 can be performed separately from this heat treatment.

その後に、外筒４内の金属触媒担体１２の波板２と平板３の表面に排気浄化触媒のコーティングが行われる。加熱処理により、それぞれの板の表面に髭状の凸、いわゆるウイスカーが発生しているため、排気浄化触媒の強固なコーティング層を作ることが出来る。   Thereafter, the surface of the corrugated plate 2 and the flat plate 3 of the metal catalyst carrier 12 in the outer cylinder 4 is coated with an exhaust purification catalyst. Due to the heat treatment, soot-like projections, so-called whiskers, are generated on the surface of each plate, so that a strong coating layer of the exhaust purification catalyst can be formed.

次に、第２の実施例を図５により説明する。本実施例は、波板と平板のステンレス箔材の形状が異なっている他は第１の実施例と同じ処理を行う。但し、第２実施例においては、ステンレス箔材へのアルミニウムの蒸着処理を金属触媒担体の巻回組み立て後に行うことも可能である。   Next, a second embodiment will be described with reference to FIG. This embodiment performs the same process as the first embodiment except that the corrugated plate and the flat stainless steel foil material are different in shape. However, in the second embodiment, it is also possible to perform the aluminum vapor deposition process on the stainless steel foil material after the metal catalyst carrier is wound and assembled.

第２の実施例のステンレス箔材は、箔材に不連続にスリットを切ると共に、箔材の長手方向に力を加えて伸ばす、所謂ラス加工を行う。これにより、ステンレス箔材は網目状に拡げられ成形される。   The stainless steel foil material according to the second embodiment performs so-called lath processing in which slits are cut discontinuously in the foil material and stretched by applying force in the longitudinal direction of the foil material. Thereby, the stainless steel foil material is expanded and formed into a mesh shape.

そして、蒸着すべき面積も少なくて済むとともに、中心電極から外筒電極までの通路の電気的抵抗地が増大するため、同電流で発熱量を大きくする事が出来る。その他、使用材料が少なくなるため、装置全体を軽量化することが出来る。また、排気ガスを流通させるとき、流れを乱す作用があるため、排気浄化触媒と排気ガスの接触が促進されて、浄化効率を高めることが可能となる。空間が平板状のステンレス箔材より多いため、巻回後にアルミニウム層を蒸着する事も可能となる。 Further, the area to be deposited can be reduced, and the electrical resistance ground of the passage from the center electrode to the outer cylinder electrode is increased, so that the heat generation amount can be increased by the same current. In addition, since the material used is reduced, the entire apparatus can be reduced in weight. In addition, when exhaust gas is circulated, there is an effect of disturbing the flow, so that contact between the exhaust purification catalyst and the exhaust gas is promoted, and purification efficiency can be increased. Since there is more space than the flat stainless steel foil material, an aluminum layer can be deposited after winding.

このようにして作られた電気加熱触媒装置１の外筒４に排気ガスを金属触媒担体１２に平均的に通過させるため図示しないディフューザを取り付け、図示しない排気通路の途中に配置することで、通電により内燃機関の始動直後から排気浄化触媒が活性温度に達して浄化作用が開始される。   A diffuser (not shown) is attached to the outer cylinder 4 of the electric heating catalyst device 1 made in this way to allow the exhaust gas to pass through the metal catalyst carrier 12 on average, and is placed in the middle of the exhaust passage (not shown) Thus, immediately after the internal combustion engine is started, the exhaust purification catalyst reaches the activation temperature and the purification action is started.

１ 電気加熱触媒装置
２ 波板
３ 平板
４ 外筒
５ 中心電極
６ 外筒電極
７ アルミニウム層
８ スリット
９ 剥離部
１０ ロウ材
１１ 穴
１２ 金属触媒担体
１３ ラスメタル状箔材 DESCRIPTION OF SYMBOLS 1 Electric heating catalyst apparatus 2 Corrugated plate 3 Flat plate 4 Outer cylinder 5 Center electrode 6 Outer cylinder electrode 7 Aluminum layer 8 Slit 9 Peeling part 10 Brazing material 11 Hole 12 Metal catalyst carrier 13 Las metal-like foil material

Claims (5)

ステンレス箔の波板と平板を重ねて中心電極を中心にして巻回することにより形成した金属触媒担体を、外周に外筒電極を取り付けた外筒内に圧入して前記外筒電極と前記金属触媒担体および前記中心電極を電気的に接続した電気加熱触媒装置において、前記金属触媒担体は少なくとも波板用又は平板用ステンレス箔材表面に予めアルミニウム層を形成させて、両者を重ねて巻回後に酸化雰囲気中において加熱することにより前記アルミニウム層を酸化アルミナに変性させると共に、前記波板と前記平板との接触部を酸化接合することを特徴とする電気加熱触媒装置。 A metal catalyst support formed by winding a corrugated plate and a flat plate of stainless steel foil around a center electrode is press-fitted into an outer cylinder having an outer cylinder electrode attached to the outer periphery, and the outer cylinder electrode and the metal In the electrically heated catalyst device in which the catalyst carrier and the central electrode are electrically connected, the metal catalyst carrier has an aluminum layer formed in advance on at least the surface of the corrugated sheet or flat plate stainless steel foil material, An electric heating catalyst device, wherein the aluminum layer is modified to alumina oxide by heating in an oxidizing atmosphere, and the contact portion between the corrugated plate and the flat plate is oxidized and bonded. 前記金属触媒担体の波板および平板がラス加工を行った箔材からなる請求項１の電気加熱触媒装置。 2. The electrically heated catalyst device according to claim 1, wherein the corrugated plate and the flat plate of the metal catalyst carrier are made of a lath processed foil material. 前記アルミニウム層が、蒸着工程により形成されている請求項１ないし請求項２の電気加熱触媒装置 3. The electric heating catalyst device according to claim 1, wherein the aluminum layer is formed by a vapor deposition process. 金属触媒担体の中心電極との接合点および外周電極との接合点のアルミニウム層を剥離し、接合点にロウ材を設けてなる請求項１ないし請求項３の電気加熱触媒装置。 4. The electrically heated catalyst device according to claim 1, wherein the aluminum layer at the junction point with the center electrode of the metal catalyst carrier and the junction point with the outer peripheral electrode is peeled off and a brazing material is provided at the junction point. ステンレス箔の波板と平板を重ねて中心電極を中心にして巻回することにより形成した金属触媒担体を、外周に電極を取り付けた外筒内に圧入して前記外筒と前記金属触媒担体および前記中心電極を電気的に接続した電気加熱触媒装置の製造方法において、前記金属触媒担体は少なくとも波板用又は平板用ステンレス箔材表面に予めアルミニウム層を形成させて、両者を重ねて巻回後に酸化雰囲気中において加熱することにより前記アルミニウム層を酸化アルミナに変性させると共に、前記波板と前記平板との接触部を酸化接合することを特徴とする電気加熱触媒装置の製造方法。
A metal catalyst carrier formed by winding a stainless steel foil corrugated plate and a flat plate around the center electrode is press-fitted into an outer cylinder having an electrode attached to the outer periphery, and the outer cylinder, the metal catalyst carrier, In the manufacturing method of the electrically heated catalyst device in which the center electrode is electrically connected, the metal catalyst carrier is formed with an aluminum layer in advance on the surface of the stainless steel foil material for at least corrugated plate or flat plate, A method for producing an electrically heated catalyst device, wherein the aluminum layer is modified into alumina oxide by heating in an oxidizing atmosphere, and the contact portion between the corrugated plate and the flat plate is oxidized and bonded.
JP2010009566A 2010-01-20 2010-01-20 ELECTRIC HEATING CATALYST DEVICE AND ITS MANUFACTURING METHOD Expired - Fee Related JP5443182B2 (en)

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