Ba4ZnzCo2_zFe36O60 hexaferrites with Z = 2.0, 1.5, 1.0, 0.5, and 0.0 were prepared by a citrate sol-gel process.The complex dielectric constant and complex perm
The effect of trace Ti and Y on Au-based alloys with 990 fineness has been investigated systematically by means of tensile test, hardness test, scanning and tra