| 摘要 |
The invention relates to powder comprising at least one element M, at least one element A and at least one element X, in the respective proportions (n+1±ε1), 1±ε2 and n±ε3, in which: A is chosen from Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb, P, As and S; M is a transition metal; X is chosen from B, C and N; n is an integer equal to 1, 2 or 3; andε1,ε2 andε3 independently represent a number ranging from 0 to 0.2, said powder having a mean particle size of less than 500 nm. |
