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1. 发明专利

JP2005272290A Needle-shaped ceramic body, needle-shaped ceramic catalyst body and method for producing the same 有权
标题翻译：针状陶瓷体，针状陶瓷催化剂体及其制造方法
公开(公告)号：JP2005272290A
公开(公告)日：2005-10-06
申请号：JP2004318609
申请日：2004-11-01
申请人： Denso Corp , National Institute Of Advanced Industrial & Technology , Nippon Soken Inc , 株式会社デンソー , 株式会社日本自動車部品総合研究所 , 独立行政法人産業技術総合研究所
发明人： DANIEL DONI JAYASEELAN , KITA HIDENORI , KONDO NAOKI , UENO SHUNKICHI , OJI TATSUKI , KANZAKI SHUZO , KOIKE KAZUHIKO , SUZAWA TAKUMI , NAKANISHI TOMOHIKO
IPC分类号： B01D53/94 , B01J21/14 , B01J21/16 , B01J32/00 , B01J35/02 , B01J35/04 , B01J35/10 , B01J37/00 , C01B33/26 , C04B35/195 , C04B38/00 , C04B41/85 , F01N3/28
CPC分类号： F01N3/2825 , B01J21/14 , B01J35/04 , B01J37/0009 , C01B33/26 , C04B35/195 , C04B38/0006 , C04B2111/0081 , F01N2370/02
摘要： PROBLEM TO BE SOLVED: To provide a needle-like ceramic body comprised of a cordierite porous body that is stable at high temperatures and has a large specific surface area as a base material and a needle-like ceramic catalyst body and a method for producing the same. SOLUTION: The needle-shaped ceramic body comprises the cordierite porous body that is composed of a porous structure of prescribed porosity formed with needle-like cordierite crystal phase and is stable at the high temperatures and has the large specific surface area as the base material. The needle-shaped ceramic catalyst body is formed by supporting a catalyst component on the ceramic body. By using the porous cordierite composed of needle-like crystals as a catalyst-supporting honeycomb structure, a decrease in the specific surface area caused by sintering can be suppressed. Since a honeycomb structure can be directly produced from a cordierite sintered body by itself, a low-cost product can be obtained by omitting a step for coating the inside of the honeycomb structure in the conventional process. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种由在高温下稳定且具有大比表面积的堇青石多孔体构成的针状陶瓷体作为基材和针状陶瓷催化剂体以及方法为了生产相同。解决方案：针状陶瓷体包括堇青石多孔体，其由具有针状堇青石结晶相的规定孔隙的多孔结构构成，在高温下稳定，比表面积大基材。针状陶瓷催化剂体通过在陶瓷体上负载催化剂成分而形成。通过使用由针状晶体构成的多孔堇青石作为催化剂负载蜂窝结构体，可以抑制由烧结引起的比表面积的降低。由于蜂窝结构体可以由堇青石烧结体本身直接制造，所以通过省略在常规方法中涂覆蜂窝结构体的内部的步骤，可以获得低成本的产品。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JP2007244993A Ceramic carrier, ceramic catalytic body and methods for manufacturing them 审中-公开
标题翻译：陶瓷载体，陶瓷催化体及其制备方法
公开(公告)号：JP2007244993A
公开(公告)日：2007-09-27
申请号：JP2006071840
申请日：2006-03-15
申请人： Denso Corp , National Institute Of Advanced Industrial & Technology , Nippon Soken Inc , 株式会社デンソー , 株式会社日本自動車部品総合研究所 , 独立行政法人産業技術総合研究所
发明人： YOSHIDA KATSUMI , DANIEL DONI JAYASEELAN , KITA HIDENORI , KONDO NAOKI , HIUGA HIDEKI , KOIKE KAZUHIKO , NAKANISHI TOMOHIKO
IPC分类号： B01J35/04 , B01D53/86 , B01J35/06 , B01J35/10 , B01J37/08 , C04B38/00
摘要： PROBLEM TO BE SOLVED: To provide a ceramic carrier having a cordierite porous body, which is stable at high temperature and has high specific surface area, as a base material and a granular agglomerate in which fibrous ceramics are intertwined with one another and to provide a ceramic catalytic body. SOLUTION: The cordierite-based porous ceramic carrier has the granular agglomerate in which fibrous ceramics are intermingled with one another. The ceramic catalytic body is manufactured by depositing a catalyst component on the porous ceramic carrier and has fibrous ceramics. A method for manufacturing the porous ceramic carrier comprises a step of reacting a part of a raw material with a porogen to produce the granular agglomerate of fibrous ceramics intermingled with one another on the surface of a sintered compact at a firing step. As a result, a catalyst-deposited honeycomb structure can be obtained, which has large specific surface area, the decrease of whose specific surface area due to the sintering is restrained, which has a small heat capacity and consequently is activated in early stages and has a small pressure loss, the cordierite porous body as the base material and the granular agglomerate of fibrous ceramics intermingled with one another. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：待解决的问题：提供一种陶瓷载体，其具有堇青石多孔体，其在高温下稳定并具有高比表面积，作为基体材料和颗粒团聚体，其中纤维状陶瓷彼此缠结，以提供陶瓷催化体。解决方案：堇青石基多孔陶瓷载体具有其中纤维状陶瓷彼此混合的颗粒聚集体。陶瓷催化剂体通过在多孔陶瓷载体上沉积催化剂组分并具有纤维状陶瓷来制造。制造多孔陶瓷载体的方法包括使一部分原料与致孔剂反应的步骤，以在煅烧步骤中在烧结体的表面上形成相互混合的纤维状陶瓷的颗粒团聚体。结果，可以获得具有大的比表面积的催化剂沉积的蜂窝结构体，抑制烧结时的比表面积的减小，其热容量小，因此在早期阶段被激活，小的压力损失，堇青石多孔体作为基础材料和相互混合的纤维状陶瓷颗粒团聚物。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2006232657A Ceramic body, ceramic carrier having catalyst carrying ability, ceramic catalytic body, and its manufacturing method 有权
标题翻译：陶瓷体，具有催化剂载体的陶瓷载体，陶瓷催化体及其制造方法
公开(公告)号：JP2006232657A
公开(公告)日：2006-09-07
申请号：JP2006004230
申请日：2006-01-11
申请人： Denso Corp , National Institute Of Advanced Industrial & Technology , Nippon Soken Inc , 株式会社デンソー , 株式会社日本自動車部品総合研究所 , 独立行政法人産業技術総合研究所
发明人： KITA HIDENORI , DANIEL DONI JAYASEELAN , KONDO NAOKI , UENO SHUNKICHI , KOIKE KAZUHIKO , YAMADA KEIICHI , NAKANISHI TOMOHIKO
IPC分类号： C04B35/195 , B01D53/94 , B01J21/10 , B01J32/00 , B01J35/02 , B01J35/10 , B01J37/02 , C04B41/87
CPC分类号： C04B35/195 , B01J21/16 , B01J35/04 , C04B35/6303 , C04B38/0006 , C04B2111/0081 , C04B2235/3213 , C04B2235/3218 , C04B2235/3229 , C04B2235/3272 , C04B2235/3409 , C04B2235/3418 , C04B2235/3445 , C04B2235/349 , C04B2235/445 , C04B2235/5445 , C04B2235/72 , C04B2235/78 , C04B2235/96 , C04B2235/9607 , C04B38/0009
摘要： PROBLEM TO BE SOLVED: To provide an acicular ceramic body using a cordierite porous body having a high specific surface area and excellent resistance to thermal shock as a substrate and to provide an acicular ceramic catalytic body. SOLUTION: A manufacturing method of the acicular ceramic body using an acicular cordierite whose tip part is roundish as the substrate, and a manufacturing method of the acicular ceramic catalytic body carrying the catalyst, and a manufacturing method of a ceramic body wherein a part of a raw material (fluoride) gasified by the reaction between raw materials in a burning process of the acicular ceramic body is grown into a roundish acicular shape on a metal catalyst (Fe) by a vapor phase-liquid phase-solid phase (VLS) reaction so that the tip part of the acicular particle may be the roundish acicular shape are provided. A honeycomb structure for carrying the catalyst composed of the acicular ceramic is suppressed in decrease of the specific surface area by sintering and early stage activation of the catalyst is possible since a heat capacity is small and pressure drop is low. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种使用具有高比表面积和优异的耐热冲击性的堇青石多孔体作为基材提供针状陶瓷体，并提供针状陶瓷催化体。解决方案：使用尖端部分为圆形的针状堇青石作为基材的针状陶瓷体的制造方法以及承载催化剂的针状陶瓷催化体的制造方法以及陶瓷体的制造方法，其中，在针状陶瓷体的燃烧过程中通过原料之间的反应气化的原料（氟化物）的一部分通过气相 - 液相 - 固相（VLS）在金属催化剂（Fe）上生长成圆形针状）反应，使得针状颗粒的尖端部分可以是圆形针状。通过烧结可以抑制由针状陶瓷构成的催化剂的携带催化剂的蜂窝结构体，由于热容量小，压降低，催化剂的早期活化是可能的。版权所有（C）2006，JPO＆NCIPI

4. 发明专利

JP2006206390A Ceramic body, ceramic carrier having catalyst carrying capacity, ceramic catalyst body and method for producing the same 审中-公开
标题翻译：陶瓷体，具有催化剂载体的陶瓷载体，陶瓷催化剂体及其生产方法
公开(公告)号：JP2006206390A
公开(公告)日：2006-08-10
申请号：JP2005021516
申请日：2005-01-28
申请人： Denso Corp , National Institute Of Advanced Industrial & Technology , Nippon Soken Inc , 株式会社デンソー , 株式会社日本自動車部品総合研究所 , 独立行政法人産業技術総合研究所
发明人： KITA HIDENORI , DANIEL DONI JAYASEELAN , KONDO NAOKI , UENO SHUNKICHI , KOIKE KAZUHIKO , NAKANISHI TOMOHIKO
IPC分类号： C04B35/195 , B01D53/86 , B01J21/16 , B01J32/00 , B01J35/04 , C04B41/85
摘要： PROBLEM TO BE SOLVED: To provide an acicular ceramic body and an acicular ceramic catalyst body using a cordierite porous body having high temperature stability and a high specific surface area as a base material, and to provide a method for producing the catalyst body. SOLUTION: The acicular ceramic body using a whisker-grown acicular cordierite crystal phase as a base material is produced by blending raw material particles having an acicular shape or a columnar shape (kaolin) or a pore forming material disappearing when fired (carbon black) into raw materials, and preparing growth spaces of acicular cordierite crystals. The acicular ceramic catalyst body is obtained by using the same. The production method therefor is also provided. According to this invention, a cordierite honeycomb having a large quantity of whisker-grown acicular particles, having a small thermal capacity for the initial activation of a catalyst, further having a low pressure loss, and having excellent thermal shock resistance can be obtained. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种使用具有高温稳定性和高比表面积的堇青石多孔体作为基材的针状陶瓷体和针状陶瓷催化剂体，提供一种催化剂体的制造方法。解决方案：使用晶须生长的针状堇青石晶相作为基材的针状陶瓷体通过混合具有针状或柱状（高岭土）的原料粒子或烧成时消失的成孔材料（碳黑色）成原料，制备针状堇青石晶体的生长空间。通过使用该针状陶瓷催化剂体。还提供了其生产方法。根据本发明，可以获得具有大量晶须生长针状颗粒的堇青石蜂窝体，其具有小的催化剂初始活化的热容量，进一步具有低压力损失并且具有优异的耐热冲击性。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2009248011A Ceramic filter with catalyst 审中-公开
标题翻译：陶瓷过滤器与催化剂
公开(公告)号：JP2009248011A
公开(公告)日：2009-10-29
申请号：JP2008100154
申请日：2008-04-08
申请人： Denso Corp , Nippon Soken Inc , 株式会社デンソー , 株式会社日本自動車部品総合研究所
发明人： OYAMA NAOHISA , NAKANISHI TOMOHIKO , OMICHI SHIGEKI
IPC分类号： B01J23/652 , B01D53/94 , B01J35/04 , B01J35/10 , C04B35/195 , F01N3/02
摘要： PROBLEM TO BE SOLVED: To provide a ceramic filter with a catalyst which is excellent in heat resistance, has sufficient catalytic performance, and can reduce the number of times of combustion removal. SOLUTION: The ceramic filter has a honeycomb structure 2 made of a cordierite base material with a large number of cells formed by arranging a porous bulkhead in the shape of a honeycomb. Among the cells of the honeycomb structure 2, the downstream end of a cell to be an introduction passage introducing exhaust gas and the upstream end of a cell to be a discharge passage discharging the exhaust gas which passed through the porous bulkhead are blocked by plug parts. In the honeycomb structure 2, the volume of pores not exceeding 5 μm measured by a mercury porosimeter method is ≤0.05 mL/g. The cordierite base material has a cordierite phase 3, a TiO 2 phase 4, and a MgWO 4 phase 5. When the whole cordierite base material is 100 mass%, Ti is at least 5.8 mass%, and W is at least 4.5 mass%. The cordierite base material supports a catalytic metal 6 made of platinum, or platinum and rhodium. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：为了提供具有耐热性优异的催化剂的陶瓷过滤器，具有足够的催化性能，并且可以减少燃烧除去的次数。解决方案：陶瓷过滤器具有由堇青石基材制成的蜂窝结构体2，其具有通过将蜂窝状的多孔隔壁设置而形成的多个单元。在蜂窝结构体2的电池中，作为引入排气的导入通道的电池的下游端和排出通过多孔隔板的废气的排出通道的电池的上游端被插塞部件。在蜂窝结构体2中，通过水银孔率计法测定的不超过5μm的孔的体积≤0.05mL/ g。堇青石基材具有堇青石相3，TiO 2 SB 3相4，MgWO 4 SB 4相。当整个堇青石基材为100质量％时，Ti为至少5.8质量％，W为4.5质量％以上。堇青石基材支持由铂或铂和铑制成的催化金属6。版权所有（C）2010，JPO＆INPIT

6. 发明专利

JP2006136845A Method for preparing ceramic catalyst body 审中-公开
标题翻译：制备陶瓷催化剂体的方法
公开(公告)号：JP2006136845A
公开(公告)日：2006-06-01
申请号：JP2004330358
申请日：2004-11-15
申请人： Denso Corp , Nippon Soken Inc , 株式会社デンソー , 株式会社日本自動車部品総合研究所
发明人： MIZUTANI KEISUKE , NAKANISHI TOMOHIKO , KOIKE KAZUHIKO
IPC分类号： B01J23/46 , B01D53/86 , B01D53/94 , B01J37/02 , F01N3/10 , F01N3/28
摘要： PROBLEM TO BE SOLVED: To provide a method for preparing a ceramic catalyst body of high catalytic performances with a proper distribution of nano particles on a ceramic carrier of Pt and Rh catalysts even under existence of impurities. SOLUTION: This method for preparing the ceramic catalyst body allows Pt and Rh to be carried on the ceramic carrier by immersing the ceramic carrier into a solution containing Pt ions and Rh ions. The amount of Ir components in the solution into which the ceramic carrier is immersed is W1×0.35≤W0 and W2×10 -4 ≤W0, wherein W0 is the weight of the Ir components contained in the solution into which the ceramic carrier is immersed, W1 is the weight of the Pb components contained as impurities in the solution and W2 is the weight of the Pt components contained in the solution. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：待解决的问题：提供一种制备具有高催化性能的陶瓷催化剂体的方法，即使在存在杂质的情况下，也能在Pt和Rh催化剂的陶瓷载体上适当分布纳米颗粒。
解决方案：制备陶瓷催化剂体的方法允许通过将陶瓷载体浸入含有Pt离子和Rh离子的溶液中来将Pt和Rh载带在陶瓷载体上。浸渍陶瓷载体的溶液中的Ir成分的量为W1×0.35≤W0，W2×10 -4 ≤W0，其中W0是溶液中所含的Ir成分的重量陶瓷载体浸入其中，W1是溶液中作为杂质含有的Pb成分的重量，W2是溶液中所含的Pt成分的重量。版权所有（C）2006，JPO＆NCIPI

7. 发明专利

JP2004290956A Method for producing ceramic catalyst body 有权
标题翻译：生产陶瓷催化剂体的方法
公开(公告)号：JP2004290956A
公开(公告)日：2004-10-21
申请号：JP2004013406
申请日：2004-01-21
申请人： Denso Corp , Nippon Soken Inc , 株式会社デンソー , 株式会社日本自動車部品総合研究所
发明人： KOIKE KAZUHIKO , TANAKA MASAICHI , SUZAWA TAKUMI , HASE TOMOMI , NAKANISHI TOMOHIKO
IPC分类号： F01N3/10 , B01D53/86 , B01D53/94 , B01J23/30 , B01J23/40 , B01J23/652 , B01J32/00 , B01J35/04 , B01J35/10 , B01J37/02 , C04B41/85 , F01N3/28
CPC分类号： B01J35/04 , B01J23/40
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a ceramic catalyst body capable of making a catalyst carried directly on a ceramic carrier without forming a coating layer on the ceramic carrier. SOLUTION: A catalyst carrying solution containing a catalyst component composed of a negative complex ion produced from a catalyst precursor is prepared. when a surface potential of a parent phase of the ceramic carrier containing a parent phase composed of a cordierite-W complex for the pH of the catalyst carrying solution and hetero-facies composed of a compound except the cordierite-W complex is E1 and a surface potential of hetero-facies of the ceramic carrier is E2, the pH of the catalyst carrying solution is adjusted so as to be E1>E2 and E1>0 to make the ceramic carrier contact with the catalyst carrying solution to be carried. Thereafter, a heat treatment is carried out to carry the catalyst on the ceramic carrier by bonding the parent phase composed of the cordierite-W complex with the catalyst component. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种能够制造直接在陶瓷载体上载持的催化剂而不在陶瓷载体上形成涂层的陶瓷催化剂体的制造方法。解决方案：制备含有由催化剂前体产生的负配位离子组成的催化剂组分的催化剂载体溶液。当含有由堇青石-W络合物构成的催化剂载体溶液的pH和由堇青石-W络合物以外的化合物构成的异相的母相的母体相的表面电位为E1，表面陶瓷载体的异质相的电位为E2，调节催化剂载体溶液的pH以使E1> E2和E1> 0，使陶瓷载体与携带催化剂的溶液接触。此后，通过将由堇青石-W络合物组成的母相与催化剂组分接合，进行催化剂载体在陶瓷载体上。版权所有（C）2005，JPO＆NCIPI

8. 发明专利

JP2009256198A Formed article of cordierite and method for manufacturing the same 有权
标题翻译：成型的CORDIER制品及其制造方法
公开(公告)号：JP2009256198A
公开(公告)日：2009-11-05
申请号：JP2009069171
申请日：2009-03-20
申请人： Denso Corp , Nippon Soken Inc , 株式会社デンソー , 株式会社日本自動車部品総合研究所
发明人： MAKINO KENTARO , UCHIYAMA KAZUSHIGE , SEGAWA YOSHIHIDE , NAKANISHI TOMOHIKO , KOBAYASHI YUICHI
IPC分类号： C04B35/195 , B01J35/04 , C04B38/00
CPC分类号： C04B38/0009 , B01J35/04 , C04B35/195 , C04B35/62655 , C04B2111/0037 , C04B2111/00413 , C04B2111/0081 , C04B2235/787 , C04B2235/96 , C04B2235/9607 , Y10T428/24149
摘要： PROBLEM TO BE SOLVED: To provide a formed article of cordierite which includes a low thermal expansion coefficient and high mechanical strength, and to provide a method for manufacturing the same. SOLUTION: Disclosed is a formed article 1 of cordierite. The cordierite composing the formed article 1 includes a plurality of domains. The domains are groups of cordierite crystals in the same direction, and the average size of the domains ranges from 40 to 150 μm. The average size of the domains preferably ranges from 50 to 100 μm. The formed article 1 is preferably formed in a honeycomb structure 1 having cell walls 11 arranged in a honeycomb form and many cells 12 divided by the cell walls 11. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种包含低热膨胀系数和高机械强度的堇青石成形品，并提供其制造方法。解决方案：公开了堇青石的成形制品1。组成成形物品1的堇青石包括多个畴。畴是相同方向的堇青石晶体组，畴的平均尺寸为40〜150μm。畴的平均尺寸优选为50〜100μm。成型体1优选形成为蜂窝结构体1，蜂窝结构体1具有以蜂窝状布置的细胞壁11和许多细胞12被细胞壁11分隔开。（C）2010，JPO＆INPIT

9. 发明专利

JP2009226301A Honeycomb structure body with high strength and its manufacturing method 审中-公开
标题翻译：蜂窝结构体高强度及其制造方法
公开(公告)号：JP2009226301A
公开(公告)日：2009-10-08
申请号：JP2008074052
申请日：2008-03-21
申请人： Denso Corp , Nippon Soken Inc , 株式会社デンソー , 株式会社日本自動車部品総合研究所
发明人： MAKINO KENTARO , SEGAWA YOSHIHIDE , NAKANISHI TOMOHIKO
IPC分类号： B01J35/04 , B01D53/86 , B01J35/10 , C04B35/195
摘要： PROBLEM TO BE SOLVED: To provide a honeycomb structure body with high strength which has large substrate strength and to provide a manufacturing method thereof. SOLUTION: The manufacturing method of the honeycomb structure body is related to a manufacturing method of the honeycomb structure 1 with high strength. The honeycomb structure consists of cordierite and has a cell wall 11 arranged in a honeycomb shape and a number of cells 12 divided within the cell wall 11. The total pore volume that is a total volume per unit weight of the pore that the cell wall 11 has is 0.2 (cc/g) or less. The method comprises the raw material preparation step of preparing the raw material for making cordierite including talc, the extrusion step of conducting the extrusionof the raw material for making cordierite to obtain the honeycomb formed body, the drying step of drying the honeycomb formed body, and the calcining step of calcining the honeycomb formed body. Talc as a raw material for making cordierite uses microcrystalline talc of which the ratio (111/006) of the strength of orientation (111) and the strength of orientation (006) among diffraction peaks by X-ray diffraction is 0.1 or more. It is preferable that the average particle size of talc is 20 μm or less. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：解决的问题：提供一种具有大的基板强度的高强度的蜂窝结构体，并提供其制造方法。解决方案：蜂窝结构体的制造方法与具有高强度的蜂窝结构体1的制造方法有关。蜂窝状结构体由堇青石构成，具有以蜂窝状形成的细胞壁11和分隔在细胞壁11内的多个细胞12.作为细胞壁11的细孔总体积的总孔容积的浓度为0.2（cc / g）以下。该方法包括制备用于制造包含滑石的堇青石原料的原料制备步骤，用于制造堇青石原料的挤出以获得蜂窝成形体的挤出步骤，干燥蜂窝成形体的干燥步骤，以及煅烧蜂窝成形体的煅烧步骤。作为制造堇青石的原料的滑石使用通过X射线衍射测定的衍射峰的取向强度（111）和取向强度（006）的比（111/006）的微晶滑石为0.1以上。滑石的平均粒径优选为20μm以下。版权所有（C）2010，JPO＆INPIT

10. 发明专利

JP2004154766A Ceramic catalyst body 有权
公开(公告)号：JP2004154766A
公开(公告)日：2004-06-03
申请号：JP2003304188
申请日：2003-08-28
申请人： Denso Corp , Nippon Soken Inc , Toyota Motor Corp , トヨタ自動車株式会社 , 株式会社デンソー , 株式会社日本自動車部品総合研究所
发明人： SUZAWA TAKUMI , UENO HIDEAKI , SUZUKI HIROMASA , NAKANISHI TOMOHIKO
IPC分类号： B01D53/94 , B01J23/10 , B01J23/63 , B01J35/04 , B01J37/02
CPC分类号： B01D53/945 , B01J23/10 , B01J23/63 , B01J35/04 , B01J37/024 , B01J37/0244 , Y02T10/22
摘要： PROBLEM TO BE SOLVED: To provide a ceramic catalyst body with low pressure loss and low heat capacity which can satisfy both of promoter capacity and heat resistance by the use of a small quantity of the catalyst body. SOLUTION: The ceramic catalyst body comprises a precious metal as a main catalyst component and a promoter component having a plurality of oxygen-absorbing abilities, which are carried in a ceramic carrier capable of directly carrying the catalyst components by replacing part of elements constituents of the substrate ceramic such as cordierite or the like. And the promoter layer is composed of the outermost layer made from a material of the highest heat-resistance and the innermost layer made from a material with high oxygen-absorbing ability so as to improve the heat resistance without increasing the supporting amount. COPYRIGHT: (C)2004,JPO

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