3 results about "Iron group" patented technology

The present invention provides a rare earth sintered magnet which contains R (R represents one or more rare earth elements essentially including Nd), T (T represents one or more iron group elements essentially including Fe), B, M1 (M1 represents one or more elements selected from among Al, Si, Cr, Mn, Cu, Zn, Ga, Ge, Mo, Sn, W, Pb and Bi) and M2 (M2 represents one or more elements selected from among Ti, V, Zr, Nb, Hf and Ta), while comprising an R2T14B phase as the main phase. This rare earth sintered magnet is characterized in that: the M1 is in an amount of from 0.5% by atom to 2% by atom; if (R), (T), (M2) and (B) are the respective atomic percentages of the above-described R, T, M2 and B, the relational expression (1) ((T) / 14)+(M2)≤(B)≤((R) / 2)+((M2) / 2) is satisfied; and from 0.1% by volume to 10% by volume of all grain boundary phases in the magnet is composed of an R6T13M1 phase. This rare earth sintered magnet is able to achieve excellent magnetic characteristics including a good balance between high Br and high HcJ.

In view of the foregoing considerations, new grade powders and associated cemented carbide compositions are needed that balance both performance and economic priorities. In one aspect, a powder composition described herein comprises particles of a solid solution carbide comprising lanthanum (La) and yttrium (Y), metallic binder phase comprising at least one metal for the iron group, and a balance of tungsten carbide particles.

The application belongs to the technical field of urea oxidation catalysts, and specifically discloses a composite nanofiber web structure material, a preparation method and application thereof. 0.2 Mo 0.8 N, Ni3Mo3N; the metal is an iron group metal, and the iron group metal is nickel. The composite nanofiber web structure material and the preparation method and application thereof have high conductivity and high specific surface area, and are a urea oxidation catalyst with application prospects.