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1.发明授权
公开(公告)号：US4972674A
公开(公告)日：1990-11-27
申请号：US341710
申请日：1989-04-21
CPC分类号： F01N13/102 , F01N13/141 , F01N13/16 , F02B77/02 , F02F7/0087 , F02B1/04 , F05C2203/08 , F05C2253/16
摘要： A heat insulating ceramic insert-cast article for an internal combustion engine, comprising a ceramic liner and a metallic member enclosing an outer periphery of the ceramic liner. The ceramic liner is adapted to contact exhaust gases. A joint boundary between the ceramic liner and the metallic member is constituted by contact faces at which the ceramic liner contacts the metallic member and heat insulating air layers at which the ceramic liner and the metallic member do not contact each other. A process for producing such a heat insulating ceramic insert-cast article is also disclosed. First, the outer periphery of the ceramic liner is covered with the heat insulating layer which is partially formed with cuts, and then the ceramic liner is enclosed with a molten metal in the state that the ceramic liner is covered with the layer. Thus, the metal flows into the cuts and solidifies therein to form contact faces between the ceramic liner and the metal, while portions at which the metal does not flow inside due to the pressure of the layer are converted to heat insulating layers.
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公开(公告)号：US5055435A
公开(公告)日：1991-10-08
申请号：US508532
申请日：1990-04-12
IPC分类号： C04B35/46 , C04B35/478 , F01N13/10 , F01N13/16 , F02B1/02 , F02B1/04 , F02B3/06 , F02B77/02 , F02F1/24 , F02F1/42 , F02F7/00
CPC分类号： F02F1/4271 , C04B35/46 , C04B35/478 , F01N13/102 , F01N13/16 , F02B77/02 , F02F1/4214 , F02F7/0087 , F02B1/02 , F02B1/04 , F02B3/06 , F02F1/4264 , F02F2001/008 , F02F2001/245 , F02F2001/4278 , F02F2200/06 , F05C2203/08 , F05C2251/042 , F05C2253/16
摘要： Ceramic materials to be insert-cast are disclosed, which each contain not less than 65% by volume of aluminum titanate as a crystalline phase, and have an average particle diameter of crystals thereof being not less than 10 .mu.m, Young's modulus of 50 to 2,000 kgf/mm.sup.2, compression strength of 5 to 40 kgf/mm.sup.2, and porosity of 5 to 35%. Ceramic port liners are also disclosed, which are free from cracking due to compression force during insert-casting, peeling-off during use, and facilitate insert-casting. To attain this, a reinforcement which meets either one or both of requirements that differences in coefficient of thermal expansion at 800.degree. C. and Young's modulus between the reinforcement and a material constituting the port liner body are in a range of .+-.0.1% and in a range of .+-.1,000 kgf/mm.sup.2, respectively, is filled into a depressed portion at an outer peripheral surface of the port liner body to form an integrated structure with a flat or swelled surface. Alternatively, the outer peripheral surface of the port liner body is worked to give uneven portions at a joining surface of the port liner body to a metal to insert-cast the port liner. Another alternative is to utilize a stress-releasing slit formed in a wall of the port liner body. Further, the outer peripheral surface of the ceramic port liner body may be covered with a ceramic sheet which is irreversively expandable by heating.
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公开(公告)号：US4953627A
公开(公告)日：1990-09-04
申请号：US409947
申请日：1989-09-20
CPC分类号： F28F21/04 , C04B37/005 , F28D19/042 , C04B2237/10 , C04B2237/341 , C04B2237/704 , C04B2237/708 , Y10S165/017 , Y10T428/24149
摘要： A ceramic heat transmission type or regenerative heat exchanger, including a plurality of matrix segments bonded together with a bonding material. A difference in coefficient of thermal expansion between the matrix segments and the bonding material is not more than 0.02% at 800.degree. C., and a Young's modulus of the bonding material is not less than 0.4 times to not more than 1.8 times that of the matrix segment. A process for producing the ceramic heat exchangers includes the steps of extruding and firing honeycomb structural segments in which a crystalline phase is mainly composed of cordierite and a coefficient of thermal expansion in an extending direction of flow channels is not more than 0.06% at 800.degree. C., machining an outer periphery of each of the segments, coating a bonding material around the outer periphery of each of the segments, bonding the segments together, and drying and firing the bonded segments. The bonding material has a coefficient of thermal expansion different from that of the matrix segments after the firing by not more than 0.02% at 800.degree. C., and a Young's modulus of the bonding material being not less than 0.4 time to not more than 1.8 times that of the matrix.
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公开(公告)号：US4767731A
公开(公告)日：1988-08-30
申请号：US886365
申请日：1986-07-17
IPC分类号： C04B35/18 , C04B35/46 , C04B35/478 , C04B35/10
CPC分类号： C04B35/478 , C04B35/18
摘要： A sintered aluminum titanate-mullite base ceramic having a chemical composition of not more than 0.8% of MgO, from 53 to 74% of Al.sub.2 O.sub.3, from 14 to 33% of TiO.sub.2, from 1.2 to 5% of Fe.sub.2 O.sub.3, from 6 to 20% of SiO.sub.2, and not more than 0.3% of (CaO+Na.sub.2 O+K.sub.2 O), and an amount of glass in mullite base matrices of the sintered body being not more than 5% when measured at a section of the sintered body. This aluminum titanate-mullite base ceramic is obtained by compounding from 40 to 65% of a starting material of aluminum titanate essentially consisting of from 45 to 62% of Al.sub.2 O.sub.3, from 34 to 50% of TiO.sub.2, from 3 to 7% of Fe.sub.2 O.sub.3, not more than 1% of SiO.sub.2 and not more than 0.3% of (CaO+Na.sub.2 O+K.sub.2 O) with from 35 to 60% of a starting material of mullite essentially consisting of from 18 to 32% of SiO.sub.2, from 68 to 82% of Al.sub.2 O.sub.3, and not more than 0.85% of (Fe.sub.2 O.sub.3 +TiO.sub.2 +CaO+MgO+Na.sub.2 O+K.sub.2 O), at least one of said aluminum titanate starting material and said mullite starting material being fired, and molding a resulting mixture, and firing a thus obtained molding at from 1,550.degree. to 1,700.degree. C. in an oxidizing atmosphere. The alumina titanate starting material may contain not more than 0.1% of MgO.
摘要翻译： 一种烧结的钛酸铝莫来石基陶瓷，其化学组成不超过MgO的0.8％，Al 2 O 3的53至74％，TiO 2的14至33％，Fe 2 O 3的1.2至5％，6至20％ 的SiO 2和不超过0.3％的（CaO + Na 2 O + K 2 O），并且当在烧结体的截面处测量时，烧结体的莫来石基体中的玻璃的量不超过5％。 这种钛酸铝 - 莫来石基陶瓷是通过将基本上由45％至62％的Al 2 O 3，34％至50％的TiO 2，3至7％的Fe 2 O 3组成的钛酸铝原料的40至65％ 不大于1％的SiO 2和不超过0.3％的（CaO + Na 2 O + K 2 O），其中35至60％的莫来石原料主要由18至32％的SiO 2，68至82％的 Al 2 O 3和0.85％以下的（Fe 2 O 3 + TiO 2 + CaO + MgO + Na 2 O + K 2 O），所述钛酸铝原料和所述莫来石原料中的至少一种被烧成， 在氧化气氛中在1550℃至1700℃下进行模塑。 钛酸铝原料可含有不超过0.1％的MgO。
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公开(公告)号：US4849275A
公开(公告)日：1989-07-18
申请号：US151996
申请日：1988-02-03
CPC分类号： B01J21/14 , C04B35/195 , C04B38/0006 , Y10T428/24149 , Y10T428/26
摘要： Cordierite honeycomb structural bodies having excellent coatability for a material of high specific surface area and a catalyst thereon and low thermal expansion are disclosed. The cordierite honeycomb structural body as a chemical composition essentially consisting of from 42 to 56% of SiO.sub.2, from 30 to 45% of Al.sub.2 O.sub.3, and from 12 to 16% of MgO in terms of weight and contains cordierite as a main component of a crystalline phase. Porosity of the cordierite honeycomb structural body is from over 30% to not more than 42%. The total volume of pores having a diameter of from 0.5 to 5 .mu.m and the total volume of pores having a diameter of not less than 10 .mu.m are not less than 70% and not more than 10% of the total pore volume of the honeycomb structural body, respectively.
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6.发明授权Catalyst carrier of cordierite honeycomb structure and method of producing the same 失效堇青石蜂窝结构催化剂载体及其制备方法
公开(公告)号：US4772580A
公开(公告)日：1988-09-20
申请号：US936501
申请日：1986-12-01
IPC分类号： B01J35/04 , C04B35/195 , C04B38/00 , B01J32/00
CPC分类号： B01J35/04 , C04B35/195 , C04B38/0006 , Y10T428/24149
摘要： Catalyst carriers made of cordierite honeycomb structures having low thermal expansion, porosities of not exceeding 30%, high strengths and thin partition walls with high cell density or low cell density are provided by using very fine particles of kaoline and talc which are considered heretofore disadvantageous for producing such catalyst carriers. The catalyst carriers are useful in a broader use field than conventional ones, particularly as catalyst carriers for purifying exhaust gases exited from automobile engines.
摘要翻译： 通过使用非常细微的高岭土和滑石颗粒，提供了具有低热膨胀，孔隙率不超过30％，高强度和高细胞密度或细胞密度低的薄隔壁的催化剂载体，其被认为是不利于 生产这种催化剂载体。 催化剂载体在比现有技术更广泛的应用领域中是有用的，特别是作为用于净化从汽车发动机排出的废气的催化剂载体。
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公开(公告)号：US06942712B2
公开(公告)日：2005-09-13
申请号：US10275121
申请日：2002-03-01
申请人： Toshiyuki Hamanaka , Takashi Harada
发明人： Toshiyuki Hamanaka , Takashi Harada
CPC分类号： F01N3/0222 , B01D39/20 , B01D39/2068 , F01N2260/10 , F01N2330/06 , Y02T10/20 , Y10S55/30
摘要： A honeycomb filter for exhaust gas purification, possessing a honeycomb structure (1) having a plurality of through-holes which are separated from each other by porous partition walls and plugged alternately at the exhaust gas inlet face (2) and the exhaust gas outlet face (3), wherein the honeycomb structure (1) has a slit (5) possessing an opening at least at the exhaust gas inlet face (2), and the slit (5) is partially filled with a filler (6) in a depth of 3 to 25 times the width (5d) of slit from the exhaust gas inlet face (3) toward a flow direction (10) of exhaust gas and a gap (5e) is formed inside from a portion of the slit filled with the filler (6). This honeycomb filter for exhaust gas purification has high purification ability, yet possesses high thermal shock resistance, and can be used continuously over a long period.
摘要翻译： 一种用于废气净化的蜂窝过滤器，具有蜂窝结构体（1），该蜂窝结构体（1）具有多个通孔，所述多个通孔由多孔分隔壁彼此分离并交替地在排气入口面（2）和排气出口面 （3），其中所述蜂窝结构体（1）具有至少在所述排气入口面（2）处具有开口的狭缝（5），并且所述狭缝（5）部分地填充有深度的填料（6） 从排气入口面（3）到排气的流动方向（10）的狭缝的宽度（5d）的3〜25倍，从填充有 填料（6）。 该废气净化用蜂窝过滤器具有高净化能力，耐热冲击性高，可长时间连续使用。
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公开(公告)号：US5069697A
公开(公告)日：1991-12-03
申请号：US389336
申请日：1989-08-03
CPC分类号： C04B35/195 , B01D39/2075 , C04B38/0006 , F01N3/0222 , F01N2330/06 , F02B3/06 , Y02T10/20 , Y10S55/30
摘要： A porous ceramic honeycomb filter having a chemical composition consisting of, as main components, 42-56 wt % SiO.sub.2, 30-45 wt % Al.sub.2 O.sub.3, and 12-16 wt % MgO and containing cordierite as a main component of a crystalline phase. The porous ceramic honeycomb filter has a porosity of at least 40% and not greater than 55%. The volume of pores having a diameter not larger than 2 .mu.m in the filter is not larger than 0.015 cc/g to thereby improve the collecting time with low pressure loss and high collecting efficiency.
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9.发明授权
公开(公告)号：US5066626A
公开(公告)日：1991-11-19
申请号：US445486
申请日：1989-12-04
申请人： Kaname Fukao , Toshiyuki Hamanaka , Takashi Harada , Noboru Kondo
发明人： Kaname Fukao , Toshiyuki Hamanaka , Takashi Harada , Noboru Kondo
IPC分类号： C04B35/111 , C04B35/478
CPC分类号： C04B35/478 , C04B35/111
摘要： A ceramic material for use in insert-casting, which contains not less than 65% by volume of aluminum titanate as a crystalline phase. The average particle diameter of crystals of the aluminum titanate is not less than 10 .mu.m, and not more than 20% by volume of a glass phase containing a rare earth element in an amount of 0.5 to 16% by weight when calculated in the form of an oxide is contained. Young's modulus is 50 to 2,000 kgf/mm.sup.2. A process for producing the same is also disclosed, which includes the steps of preparing a powder by mixing a material, as an Al.sub.2 O.sub.3 source material, containing not more than 96% by weight of Al.sub.2 O.sub.3 and having an average particle size of not less than 3 .mu.m, a material having an average particle diameter of not more than 3 .mu.m as a TiO.sub.2 source material, and a given rare earth element in an amount of 1.8% by weight when calculated in the form of an oxide, shaping the powder, and drying and firing the shaped body. The ceramic material has an actual break strain of not less than 6.times.10.sup.-3. The process for producing such a ceramic material includes a step of cooling the shaped body at a rate of at least not less than 500.degree. C./hr in a temperature range not less than 200.degree. C. during and/or after the firing.
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10.发明授权Method of proudcing ceramic manifolds for thermally insulating exhaust channels 失效引导用于隔热排气通道的陶瓷歧管的方法
公开(公告)号：US5013501A
公开(公告)日：1991-05-07
申请号：US454381
申请日：1989-12-21
申请人： Kaname Fukao , Toshiyuki Hamanaka , Takashi Harada
发明人： Kaname Fukao , Toshiyuki Hamanaka , Takashi Harada
CPC分类号： F01N13/16 , B28B11/12 , F01N13/102 , F01N13/18 , F02B1/04
摘要： In a method for effectively producing ceramic manifolds for thermally insulating exhaust channels, an intermediate product is first formed by drain casting which includes a main ceramic pipe having a plurality of branch pipes extending therefrom whose ends are connected together by elongated connection members in the form of thin plates or bars. Thereafter, the intermediate product is fired and the ends of the branch pipes are then cut off together with the connection members. In this manner, even ceramic pipes complicated in shape readily can be produced by preventing strains and deformations which would otherwise occur during firing of the intermediate product.
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