Patent ID: 7226543
Filing Date: 2007-06-05
Classification: C01F,C01P,C22C,F25B,H01F,Y10S

Abstract:
1. A rare earth metal oxysulfide regenerative material comprising a rare earth metal oxysulfide represented by a general formula R 2 O 2 S in which R represents at least one member of rare earth elements selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y, characterized in that an additive comprising an oxide, a carbide or a nitride of at least one member selected from the group consisting of alkaline-earth metals, transition metals, and elements of 3b and 4b groups of the periodic table excluding C is added to said rare earth metal oxysulfide by 0.05–30 wt %.