JPH05103996A - Formation of carrier layer on metal substrate for catalyst - Google Patents
Formation of carrier layer on metal substrate for catalystInfo
- Publication number
- JPH05103996A JPH05103996A JP29638491A JP29638491A JPH05103996A JP H05103996 A JPH05103996 A JP H05103996A JP 29638491 A JP29638491 A JP 29638491A JP 29638491 A JP29638491 A JP 29638491A JP H05103996 A JPH05103996 A JP H05103996A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- metal substrate
- layer
- carrier layer
- component
- 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.)
- Pending
Links
Landscapes
- Catalysts (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、燃焼用触媒、排ガス触
媒等における金属基体へ触媒を担持する為の担体層を形
成する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a carrier layer for supporting a catalyst on a metal substrate of a combustion catalyst, an exhaust gas catalyst or the like.
【0002】[0002]
【従来の技術】従来、触媒用金属基体へ触媒担持用担体
層を形成するには、特開昭56-96726号公報に記載されて
いるようにAlの入ったステンレス鋼の触媒用金属基体
を熱処理して表面に Al2O3層を形成し、この Al2O3層の
上に高表面積のセラミックス担体層を形成し、触媒用金
属基体とセラミックス担体層とを固定していた。しか
し、触媒用金属基体と Al2O3層との間には明確な界面が
存在し、金属とセラミックスの熱膨張率の違いによる応
力が界面に集中し、剥離が生じる恐れがある。従って、
上記のセラミックス担体層に触媒を担持させて得た燃焼
用触媒や排ガス触媒は、高温耐久性に難点があり、寿命
も短い。2. Description of the Related Art Conventionally, in order to form a catalyst-supporting carrier layer on a catalyst metal substrate, as described in JP-A-56-96726, an Al-containing stainless steel catalyst metal substrate is used. the the Al 2 O 3 layer is formed on the surface was heat-treated, the the Al 2 O 3 layer a ceramic carrier layer of high surface area is formed on the, was fixed and a catalyst for the metal substrate and the ceramic carrier layer. However, there is a clear interface between the catalytic metal substrate and the Al 2 O 3 layer, and stress due to the difference in the coefficient of thermal expansion between the metal and the ceramics concentrates on the interface, and peeling may occur. Therefore,
The combustion catalyst and the exhaust gas catalyst obtained by supporting the catalyst on the ceramics carrier layer have a problem in high temperature durability and have a short life.
【0003】[0003]
【発明が解決しようとする課題】そこで本発明は、触媒
用金属基体へ強い密着力でセラミックス担体層を強固に
固定できるようにした担体層形成方法を提供しようとす
るものである。Therefore, the present invention is to provide a carrier layer forming method capable of firmly fixing a ceramics carrier layer to a metal substrate for catalyst with a strong adhesive force.
【0004】[0004]
【課題を解決するための手段】上記課題を解決するため
の本発明の触媒用金属基体への担体層形成方法の1つ
は、触媒用金属基体の表面に、プラズマ溶射によりP
t、Au、Pt−Au合金のいずれかの貴金属成分と A
l2O3、ZrO2、 NiO、 Cr2O3、SiO2、MgO これらの複合酸
化物のいずれかのセラミックス成分との混在層を形成
し、然る後その混在層上にプラズマ溶射、ディッピン
グ、塗布、スプレー等の方法によりセラミックス担体層
を形成することを特徴とするものである。One of the methods for forming a carrier layer on a metal substrate for a catalyst according to the present invention for solving the above-mentioned problems is to apply P on the surface of the metal substrate for a catalyst by plasma spraying.
Noble metal component of t, Au, or Pt-Au alloy and A
l 2 O 3, ZrO 2, NiO, Cr 2 O 3, SiO 2, MgO to form a mixed layer of any of the ceramic components of these composite oxides, plasma spraying onto thereafter the mixed layer, dipping The method is characterized in that the ceramic carrier layer is formed by a method such as coating, spraying or the like.
【0005】本発明の触媒用金属基体への担体層形成方
法の他の1つは、上記の混在層を形成する際、貴金属成
分とセラミックス成分の組成比を、触媒用金属基体側で
貴金属成分が多くなるように断面方向で変化させること
を特徴とするものである。Another method of forming a carrier layer on a metal substrate for a catalyst according to the present invention is such that, when forming the above mixed layer, the composition ratio of the noble metal component and the ceramic component is set on the metal substrate for a catalyst side. It is characterized in that it is changed in the cross-sectional direction so that
【0006】[0006]
【作用】上記のように本発明の触媒用金属基体への担体
層形成方法では、金属基体上へ、互いに固溶せず、夫々
のネットワークを作る貴金属成分とセラミックス成分と
の混在層を形成するので、金属基体とセラミックス担体
層とは強固に密着し、両者の熱膨張の違いによる応力の
かかり方は、混在層中なだらかとなり、応力が緩衡され
て、高温中でもセラミックス担体層が金属基体から剥離
することがない。特に混在層中の貴金属成分とセラミッ
クス成分の組成比を、金属基体側で貴金属成分が多くな
るように断面方向つまり層厚方向で変化させると、応力
はより一層緩衡されると同時に、金属基体、混在層、担
体層の三者の密着力がより一層強固なものとなって剥離
しない。As described above, according to the method for forming a carrier layer on a metal substrate for a catalyst of the present invention, a mixed layer of a noble metal component and a ceramic component that does not form a solid solution with each other and forms respective networks is formed on the metal substrate. Therefore, the metal base and the ceramics carrier layer are firmly adhered to each other, and the stress due to the difference in thermal expansion between the two is gentle in the mixed layer, the stress is moderated, and the ceramics carrier layer is kept from the metal substrate even at high temperature. Does not peel off. In particular, when the composition ratio of the noble metal component and the ceramics component in the mixed layer is changed in the cross-sectional direction, that is, the layer thickness direction so that the noble metal component is increased on the metal substrate side, the stress is further balanced and at the same time the metal substrate is , The mixed layer and the carrier layer have a stronger adhesion force and are not peeled off.
【0007】[0007]
【実施例】本発明の触媒用金属基体への担体層形成方法
の一実施例を説明すると、SUS(ステンレス鋼)より
なる触媒用金属基体の表面に、プラズマ溶射によりPt
とAl2O3との混在層を形成した。この混在層は初期Pt9
9%、Al1%の割合でスタートし、その比をPtを減
らす形で連続的に変えていき、最終の比はPt5%、A
l95%である。然る後この混在層の上にプラズマ溶射に
より Al2O3担体層を形成した。EXAMPLE An example of a method for forming a carrier layer on a metal substrate for a catalyst of the present invention will be described. Pt is formed by plasma spraying on the surface of a metal substrate for a catalyst made of SUS (stainless steel).
And a mixed layer of Al 2 O 3 was formed. This mixed layer is the initial Pt9
Starting with the ratio of 9% and Al1%, the ratio is continuously changed to reduce Pt, and the final ratio is Pt5%, A
It is 95%. After that, an Al 2 O 3 carrier layer was formed on the mixed layer by plasma spraying.
【0008】一方、従来例について説明すると、Alの
入ったステンレス鋼の触媒用金属基体を熱処理して表面
に Al2O3層を形成し、然る後この Al2O3層上にプラズマ
溶射により Al2O3担体層を形成した。On the other hand, to explain the conventional example, a stainless steel catalytic metal substrate containing Al is heat-treated to form an Al 2 O 3 layer on the surface, and then plasma spraying is performed on this Al 2 O 3 layer. To form an Al 2 O 3 carrier layer.
【0009】然してこのように触媒用金属基体上に Al2
O3担体層を形成した実施例及び従来例の触媒用支持体に
室温←→1000℃の熱サイクルをかけ、断面を 100gの荷
重で500rpmの研摩機にかけて、熱サイクルが何サイクル
の時 Al2O3担体層が研摩により触媒用金属基体から剥離
したかをSEMで観察した処、従来例の触媒用支持体の
Al2O3担体層は7サイクルで剥離したが、実施例の触媒
用支持体の Al2O3担体層は20サイクルまで剥離しなかっ
た。Thus, in this way, Al 2 is deposited on the metal substrate for catalyst.
O 3 in the catalyst support of Examples and Conventional Example was formed a support layer over the thermal cycle of room temperature ← → 1000 ° C., subjected sander 500rpm the cross section with a load of 100 g, when the heat cycle is many cycles Al 2 SEM observation of whether the O 3 carrier layer was peeled off from the catalyst metal substrate by polishing revealed that the catalyst support of the conventional example was
The Al 2 O 3 carrier layer was peeled off in 7 cycles, but the Al 2 O 3 carrier layer of the catalyst support of the example was not peeled off until 20 cycles.
【0010】[0010]
【発明の効果】以上の通り本発明の触媒用金属基体への
担体層形成方法では、金属基体上へ、互いに固溶せず、
夫々のネットワークを作る貴金属成分とセラミックス成
分との混在層を形成するので、この混在層上に形成され
るセラミックス担体層は金属基体と混在層を介して強固
に密着し、両者の熱膨張の違いによる応力のかかり方
は、混在層中なだらかとなり、応力が緩衡されて高温中
でもセラミックス担体層が金属基体から剥離することが
ない。特に混在層中の貴金属成分とセラミックス成分の
組成比を、金属基体側で貴金属成分が多くなるように層
厚方向で変化させると、応力はより一層緩衡されると同
時に、金属基体、混在層、担体層の三者の密着力がより
一層強固なものとなって剥離しない。従ってこの担体層
に触媒を担持させて得た燃焼用触媒や排ガス触媒は、高
温耐久性に優れ、長寿命となる。As described above, according to the method for forming a carrier layer on a metal substrate for a catalyst of the present invention, the metal substrate does not form a solid solution with each other,
Since the mixed layer of the noble metal component and the ceramic component that forms each network is formed, the ceramic carrier layer formed on this mixed layer firmly adheres to the metal substrate through the mixed layer, and the difference in thermal expansion between the two The stress applied by the method becomes gentle in the mixed layer, and the ceramic carrier layer does not peel off from the metal substrate even at high temperature due to stress relaxation. In particular, if the composition ratio of the noble metal component and the ceramics component in the mixed layer is changed in the layer thickness direction so that the precious metal component is increased on the metal substrate side, the stress is further balanced and at the same time the metal substrate and the mixed layer are mixed. However, the adhesion force of the three members of the carrier layer becomes even stronger and does not separate. Therefore, the combustion catalyst and the exhaust gas catalyst obtained by supporting the catalyst on the carrier layer have excellent high-temperature durability and long life.
Claims (2)
によりPt、Au、Pt−Au合金のいずれかの貴金属
成分と Al2O3、ZrO2、 NiO、 Cr2O3、SiO2、MgO これら
の複合酸化物のいずれかのセラミックス成分との混在層
を形成し、然る後その混在層上にプラズマ溶射、ディッ
ピング、塗布、スプレー等の方法によりセラミックス担
体層を形成することを特徴とする触媒用金属基体への担
体層形成方法。1. A noble metal component of Pt, Au, or a Pt-Au alloy and Al 2 O 3 , ZrO 2 , NiO, Cr 2 O 3 , SiO 2 , MgO formed on the surface of a metal base for a catalyst by plasma spraying. The invention is characterized in that a mixed layer of any of these composite oxides with a ceramic component is formed, and then a ceramic carrier layer is formed on the mixed layer by a method such as plasma spraying, dipping, coating or spraying. A method for forming a carrier layer on a metal substrate for a catalyst.
層形成方法に於いて、混在層の貴金属成分とセラミック
ス成分の組成比を、触媒用金属基体側で貴金属成分が多
くなるように断面方向で変化させて混在層を形成するこ
とを特徴とする触媒用金属基体への担体層形成方法。2. The method for forming a carrier layer on a metal substrate for a catalyst according to claim 1, wherein the composition ratio of the noble metal component and the ceramics component of the mixed layer is such that the noble metal component is increased on the side of the metal substrate for a catalyst. A method for forming a carrier layer on a metal base for a catalyst, which comprises forming a mixed layer by changing the cross-sectional direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29638491A JPH05103996A (en) | 1991-10-16 | 1991-10-16 | Formation of carrier layer on metal substrate for catalyst |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29638491A JPH05103996A (en) | 1991-10-16 | 1991-10-16 | Formation of carrier layer on metal substrate for catalyst |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05103996A true JPH05103996A (en) | 1993-04-27 |
Family
ID=17832852
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP29638491A Pending JPH05103996A (en) | 1991-10-16 | 1991-10-16 | Formation of carrier layer on metal substrate for catalyst |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05103996A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001096234A3 (en) * | 2000-06-13 | 2002-05-16 | Conoco Inc | Supported nickel-magnesium oxide catalysts and processes for the production of syngas |
US7727931B2 (en) | 2003-09-26 | 2010-06-01 | 3M Innovative Properties Company | Catalysts, activating agents, support media, and related methodologies useful for making catalyst systems especially when the catalyst is deposited onto the support media using physical vapor deposition |
US8058202B2 (en) | 2005-01-04 | 2011-11-15 | 3M Innovative Properties Company | Heterogeneous, composite, carbonaceous catalyst system and methods that use catalytically active gold |
-
1991
- 1991-10-16 JP JP29638491A patent/JPH05103996A/en active Pending
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001096234A3 (en) * | 2000-06-13 | 2002-05-16 | Conoco Inc | Supported nickel-magnesium oxide catalysts and processes for the production of syngas |
US6635191B2 (en) | 2000-06-13 | 2003-10-21 | Conocophillips Company | Supported nickel-magnesium oxide catalysts and processes for the production of syngas |
US7727931B2 (en) | 2003-09-26 | 2010-06-01 | 3M Innovative Properties Company | Catalysts, activating agents, support media, and related methodologies useful for making catalyst systems especially when the catalyst is deposited onto the support media using physical vapor deposition |
US7989384B2 (en) | 2003-09-26 | 2011-08-02 | 3M Innovative Properties Company | Catalysts, activating agents, support media, and related methodologies useful for making catalyst systems especially when the catalyst is deposited onto the support media using physical vapor deposition |
US8314048B2 (en) | 2003-09-26 | 2012-11-20 | 3M Innovative Properties Company | Catalysts, activating agents, support media, and related methodologies useful for making catalyst systems especially when the catalyst is deposited onto the support media using physical vapor deposition |
US8618020B2 (en) | 2003-09-26 | 2013-12-31 | 3M Innovative Properties Company | Catalysts, activating agents, support media, and related methodologies useful for making catalyst systems especially when the catalyst is deposited onto the support media using physical vapor deposition |
US8664148B2 (en) | 2003-09-26 | 2014-03-04 | 3M Innovative Properties Company | Catalysts, activating agents, support media, and related methodologies useful for making catalyst systems especially when the catalyst is deposited onto the support media using physical vapor deposition |
US8058202B2 (en) | 2005-01-04 | 2011-11-15 | 3M Innovative Properties Company | Heterogeneous, composite, carbonaceous catalyst system and methods that use catalytically active gold |
US8314046B2 (en) | 2005-01-04 | 2012-11-20 | 3M Innovative Properties Company | Heterogeneous, composite, carbonaceous catalyst system and methods that use catalytically active gold |
US8518854B2 (en) | 2005-01-04 | 2013-08-27 | 3M Innovative Properties Company | Heterogeneous, composite, carbonaceous catalyst system and methods that use catalytically active gold |
US8664149B2 (en) | 2005-01-04 | 2014-03-04 | 3M Innovative Properties Company | Heterogeneous, composite, carbonaceous catalyst system and methods that use catalytically active gold |
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