| 摘要 |
A holding material 13 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 100, 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. Preferably, the holding material further includes a mat layer 110 comprising inorganic fibres laminated on the low thermal conductivity layer and a protective layer 120 may be provided. The inorganic powder is preferably suitable for compression moulding and examples include metal oxides such as silica (particularly fumed silica), alumina or titanium oxide. Preferably the holding material has a thermal conductivity at 300{C of 0.04W/m.K or less. |
