Abstract: An ultra-low thermal mass refractory article includes fibers impregnated with a colloidal inorganic oxide. The refractory article has at least one of the following properties: (i) a density of 500 kg/m3 to 1500 kg/m3; (ii) a thermal conductivity of 1.0 Wm/K or less at 700° C.; and/or (iii) a linear thermal shrinkage at 1400° C. of less than 2.5%.

Abstract: An exhaust gas treatment device includes a housing, a fragile element disposed within the housing, and a mounting mat disposed between the fragile element and the housing for maintaining the positioning of the fragile element, absorbing mechanical shock, and providing thermal insulation. The mounting mat includes a layer or sheet of inorganic fibers with a portion of the layer having a first basis weight and another portion having a second basis weight that is different from the first basis weight. The mat or a vacuum formed insulating pre-form having a variable basis weight in certain regions may be used as end cone insulation in exhaust gas treatment devices.

Abstract: A mat or mat-pre-form hybrid for use in an exhaust gas treatment device, such as catalytic converters and diesel particulate traps that are used in automotive exhaust systems. The mat or hybrid may be used as a mounting mat to mount a fragile monolith within an outer housing of an exhaust gas treatment device or as thermal insulation in an end cone of the exhaust gas treatment device.

Abstract: A support system for a fragile substrate of an exhaust gas treatment device includes a microporous, inorganic insulating layer, which directly or indirectly engages at least a portion of the fragile substrate: and a flexible fibrous mounting mat which directly or indirectly engages at least a portion of said fragile substrate. The support system may support the fragile substrate of a catalytic converter, a diesel particulate trap filter, a selective catalyst reduction unit, or a NOx trap.

Abstract: An exhaust gas treatment device includes a housing, a fragile element disposed within the housing, and a mounting mat disposed between the fragile element and the housing for maintaining the positioning of the fragile element, absorbing mechanical shock, and providing thermal insulation. The mounting mat includes a layer or sheet of inorganic fibers with a portion of the layer having a first basis weight and another portion having a second basis weight that is different from the first basis weight. The mat or a vacuum formed insulating pre-form having a variable basis weight in certain regions may be used as end cone insulation in exhaust gas treatment devices.

Abstract: A mat or mat-pre-form hybrid for use in an exhaust gas treatment device, such as catalytic converters and diesel particulate traps that are used in automotive exhaust systems. The mat or hybrid may be used as a mounting mat to mount a fragile monolith within an outer housing of an exhaust gas treatment device or as thermal insulation in an end cone of the exhaust gas treatment device.

Abstract: A support system for a fragile substrate of an exhaust gas treatment device includes a microporous, inorganic insulating layer, which directly or indirectly engages at least a portion of the fragile substrate: and a flexible fibrous mounting mat which directly or indirectly engages at least a portion of said fragile substrate. The support system may support the fragile substrate of a catalytic converter, a diesel particulate trap filter, a selective catalyst reduction unit, or a NOx trap.