FIBRES D'ALUMINE, AGRÉGAT DE FIBRES D'ALUMINE ET MATÉRIAU DE RETENUE DESTINÉS À ÊTRE UTILISÉS DANS UN DISPOSITIF DE PURIFICATION DE GAZ D'ÉCHAPPEMENT

摘要

The present invention relates to an alumina fiber having a mass ratio (A/C) of the content (A) of iron oxide as expressed in terms of ferric oxide to the content (C) of titanium oxide of 2 to 121; and a mass ratio (B/C) of the content (B) of calcium oxide to the content (C) of titanium oxide of 0.4 to 14, with a sum total of the content (A) of iron oxide, the content (B) of calcium oxide, and the content (C) of titanium oxide being 0.0170 to 0.1180% by mass.