| 摘要 |
A catalyst-carrier supporting material of a catalytic converter excellent in heat resistance and capable of maintaining a sufficient holding capability for supporting the catalyst-carrier for a long duration even in the environments exceeding 950° C. The catalyst-carrier supporting material comprising: a heat resistant layer which contains crystalline alumina fibers and an organic binder evenly impregnated with the crystalline alumina fibers and to be eliminated by thermal decomposition; and a thermally intumescent layer layered on the heat resistant layer which contains crystalline alumina fibers, an organic binder dispersed in the crystalline alumina fibers and to be eliminated by thermal decomposition, and vermiculite dispersed in the crystalline alumina fibers, wherein the crystalline alumina fibers exist in an amount of 1,400 g/m2 or higher in the catalyst-carrier supporting material, the ratio of the amount of the crystalline alumina fibers existing in the heat resistant layer and the amount of the crystalline alumina fibers existing in the thermally intumescent layer is 0.98 to 1.98, and the vermiculite exists in an amount of 23 to 33% by weight in the thermally intumescent layer.
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