| 摘要 |
The present invention provides a mounting mat ( 30 ) for mounting a pollution control monolith ( 20 ) in a pollution control device ( 10 ). The mounting mat has a bulk density of 0.12 to 0.3 g/cm<SUP>3 </SUP>and comprises (i) a layer of chopped magnesium aluminium silicate glass fibers and (ii) a layer of ceramic fibers obtainable from a sol-gel process. Preferably, the layer of chopped magnesium aluminium silicate glass fibers and the layer of ceramic fibers define opposite major surfaces of the mat. The present invention further provides a pollution control device ( 10 ), comprising a pollution control monolith ( 20 ) arranged in a metallic casing ( 11 ) with the mounting mat ( 30 ) disposed between the metallic casing ( 11 ) and pollution control monolith ( 20 ).
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