摘要:
There is disclosed a catalytic body with purifying efficiency and smaller pressure loss and its manufacturing method. Provided is a catalytic body wherein a porous honeycomb structure including partition walls defining a plurality of cells acting as fluid passages which extend through the honeycomb structure from one end surface to the other end surface thereof is formed of at least one type of (a) a catalytic substance and (b) a substance including an oxide and at least one type of noble metal carried on the oxide. The catalytic converter is characterized in that (c) 10% or more of a plurality of cells are plugged by plugging parts formed at one ends or in the middles of passages, that (d) the average pore diameter of the honeycomb structure is 10 μm or more, or that (e) the porosity is 40% or more.
摘要:
A honeycomb structure according to the present invention has partition walls, and a number of through-holes divided from each other by the partition walls and extending in an axial direction. The honeycomb structure contains silicon carbide (SiC) or a composite material having silicon carbide (SiC) as a main crystal phase, and has a cylindrical shape. A circularity of a periphery of the honeycomb structure is in a range of 1.0 to 2.5 mm. The honeycomb structure can be contained in a metal container in stable state and hardly has problems such as breakage or breakdown.
摘要:
A ceramic jig for hot rolling is a sintered body consisting essentially of Si.sub.3 N.sub.4, a sintering aid and trace amounts of impurities. In the ceramic jig, crystallization is made among the Si.sub.3 N.sub.4 grains, and a crystalline phase among the grains comprises 80% or more of a J phase, 10% or less of an H phase and 5% or less of a K phase. A reaction of a jig component with iron and water can be inhibited, and the wear of the jig at the time of rolling can be reduced. The seizure of the jig on a steel material does not occur, so that scratches on products can be remarkably reduced.
摘要翻译:用于热轧的陶瓷夹具是基本上由Si 3 N 4,烧结助剂和痕量杂质组成的烧结体。 在陶瓷夹具中,在Si 3 N 4晶粒之间进行结晶化,晶粒中的结晶相包含80%以上的J相,10%以下的H相和5%以下的K相。 可以抑制夹具组分与铁和水的反应,并且可以减少轧制时的夹具的磨损。 在钢材上夹具不会发生,从而可以显着降低产品上的划痕。
摘要:
An aluminum titanate ceramic has as main crystalline phases, a crystalline phase of aluminum titanate and a solid solution thereof, a crystalline phase of mullite and a crystalline phase of rare earth titanate represented by RE.sub.2 Ti.sub.2 O.sub.7 (RE represents Y, Yb, Er, Dy, Ho, Tm or Lu). The aluminum titanate ceramic is superior in casting property and has high heat cycle durability.
摘要翻译:钛酸铝陶瓷具有主要的结晶相,钛酸铝的结晶相及其固溶体,莫来石的结晶相和由RE 2 Ti 2 O 7表示的稀土钛酸盐的结晶相(RE表示Y,Yb,Er,Dy,Ho ,Tm或Lu)。 钛酸铝陶瓷的铸造性能优异,热循环耐久性高。