Patent ID: 6322926
Filing Date: 2001-11-27
Classification: B22F,C01B,C22C,H01M,Y02E,Y10S

Abstract:
An AB.sub.5 type hydrogen absorbing alloy powder obtained by preparing a hydrogen absorbing alloy according to a rapid quenching method and subjecting the hydrogen absorbing alloy to fracturing by absorbing hydrogen, wherein the particle size distribution of the hydrogen absorbing alloy powder resulting from fracturing by absorbing hydrogen is such that, when the frequencies of detection of various particle diameters are cumulatively added from smaller-diameter to larger-diameter particles, corresponding to 10%, 50%, and 90% in size of all particles are represented by D.sub.10, D.sub.50, and D.sub.90, respectively, the values of D.sub.10, D.sub.50, and D.sub.90 fall within the respective ranges defined by 4 .mu.m.ltoreq.D.sub.10.ltoreq.14 .mu.m, 17 .mu.m.ltoreq.D.sub.50.ltoreq.37 .mu.m, and 40 .mu.m.ltoreq.D.sub.90.ltoreq.70 .mu.m.