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    • 35. 发明授权
    • Monolithic honeycomb structure made of porous ceramic and use as a particle filter
    • 由多孔陶瓷制成的单片蜂窝结构体,用作颗粒过滤器
    • US06582796B1
    • 2003-06-24
    • US09621345
    • 2000-07-21
    • Jean Pierre JoulinFabienne PourchetPhilippe CourtyJean-Baptiste Dementhon
    • Jean Pierre JoulinFabienne PourchetPhilippe CourtyJean-Baptiste Dementhon
    • B32B312
    • F01N3/0222C04B38/0006C04B2111/00793F01N2330/06Y02T10/20Y10T428/24149Y10T428/24628Y10T428/24744Y10T428/252Y10T428/26C04B35/565C04B35/6303C04B38/0054
    • A monolithic honeycomb-type structure useful in particular as a particle filter for exhaust gases from diesel engines has a number of passages that empty into the end faces of said monolith, but are alternately open and sealed. The monolith consists of a porous refractory material that comprises: 70 to 97% by mass of &agr; and/or &bgr; crystallographic-type silicon carbide that has at least one particle size and preferably at least two particle sizes, and 3 to 30% by mass of at least one bonding ceramic phase in the form of a micronic powder or particles that are obtained by atomization, comprising at least one simple oxide, for example, B2O3, Al2O3, SiO2, MgO, K2O, Li2O, Na2O, CaO, BaO, TiO, ZrO2 and Fe2O3 and/or at least one mixed oxide, for example, the alkaline aluminosilicates (of Li, Na, or K) or alkaline-earth aluminosilicates (of Mg, Ca, Sr or Ba), clays, bentonite, feldspars or other natural silico-aluminous materials. The production of the monolith comprises a calcination stage under an oxygen-containing atmosphere at a temperature up to 1650° C., but less than 1550° C.
    • 特别是作为来自柴油发动机的废气的颗粒过滤器的整体式蜂窝型结构具有多个通向所述整体料的端面的通道,而是交替地开放和密封。 整料由多孔耐火材料组成,其包括:具有至少一个粒度,优选至少两个粒度的70和97质量%的α和/或β晶型碳化硅,和3至30质量% 至少一种微晶粉末形式的结合陶瓷相或通过雾化获得的颗粒,其包含至少一种简单的氧化物,例如B2O3,Al2O3,SiO2,MgO,K2O,Li2O,Na2O,CaO,BaO, TiO,ZrO 2和Fe 2 O 3和/或至少一种混合氧化物,例如碱性硅铝酸盐(Li,Na或K)或碱土金属硅酸盐(Mg,Ca,Sr或Ba),粘土,膨润土,长石 或其他天然硅铝质材料。 整料的生产包括在含氧气氛下在高达1650℃但小于1550℃的温度下的煅烧阶段