High aspect ratio iron oxide uisuka, in the atmosphere which contains high aspect ratio oxidation chitanuisuka and structure and that

摘要

PROBLEM TO BE SOLVED: To provide an iron oxide whisker of a high aspect ratio or a titanium oxide whisker of a high aspect ratio, which is useful as a magnetic material for magnetic recording or a micromachine component, and to provide a structure having such a whisker erected on a basal plate that is useful as a catalyst.;SOLUTION: The iron oxide whisker contains non-iron metal atoms in an amount of ≤10 atom%, and has a diameter of 5 nm to 2 μm and an aspect ratio of ≥20. The titanium oxide whisker contains non-titanium metal atoms in an amount of ≤10 atom%, and has a diameter of 5nm to 20 μm and an aspect ratio of ≥5. There is provided a structure, such as a basal plate having these whiskers densely erected thereon. These whiskers excel in magnetic properties etc., and the structures having these erected exert excellent characteristics, such as large contact area as the catalyst and freedom from clogging, and hence are useful. In the production of these oxide whiskers, an iron or titanium material is brought into contact with an oxidative atmosphere so as to react the surface iron or titanium atoms with oxygen brought into contact therewith at high temperature, thereby attaining growth as oxide whiskers.;COPYRIGHT: (C)2006,JPO&NCIPI