Rare earth metal oxysulfide regenerative material and...

Details Rare earth metal oxysulfide regenerative material and... Rare earth metal oxysulfide regenerative material and...

2007-06-05

2007-06-05

Vanoy, Timothy C. (Department: 1754)

Compositions

Miscellaneous

C252S067000, C252S071000, C062S006000, C062S909000, C165S004000

Reexamination Certificate

active

10344917

ABSTRACT:
A rare earth metal oxysulfide represented by a general formula R2O2S (R denotes one kind or two or more kinds of rare earth elements to be selected from a group of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, as wells as Y) is formed into spherical granules. The mean particle size of the granules is 0.05–1 mm and their relative density is 96% or over. The granules are used as a regenerative material at the liquid helium temperature.

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