Catalytic converter, holding material for catalytic converter and production method thereof
AssigneeNichias Corporation
InventorsNobuya TOMOSUE, Kazutoshi Isomura, Tadashi Sakane
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Abstract
The present invention relates to a holding material for a catalytic converter including a catalyst carrier, a metal casing for receiving the catalyst carrier, and the holding material wound around the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, the holding material including a low thermal conductivity layer, in which the low thermal conductivity layer includes: a molded material containing an inorganic powder; or a composite material of a porous substrate with an aerogel.
Claims8
A holding material for a catalytic converter comprising a catalyst carrier, a metal casing for receiving the catalyst carrier, and the holding material wound around the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing,
- the holding material comprising a low thermal conductivity layer, wherein the low thermal conductivity layer comprises:
- a molded material containing an inorganic powder;
- or a composite material of a porous substrate with an aerogel.
A method for producing a holding material for a catalytic converter comprising a catalyst carrier, a metal casing for receiving the catalyst carrier, and the holding material wound around the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, which method comprises:
- impregnating a whole porous substrate with an aerogel precursor;
- and
- conducting supercritical drying to produce a low thermal conductivity layer.
A method for producing a holding material for a catalytic converter comprising a catalyst carrier, a metal casing for receiving the catalyst carrier, and the holding material wound around the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, which method comprises:
- impregnating a surface of the mat material comprising a porous substrate with an aerogel precursor;
- and
- conducting supercritical drying to produce a low thermal conductivity layer.
Dependencies are inferred from the claim text.