Synthesis of strong-magnetic nanosized black pigment ZnxFe(3−x)O4

In this paper, ZnxFe(3−x)O4 (0 ≤ x ≤ 0.5), nanosized magnetic black pigments, were synthesized using phase transformation at 70 °C. It was found that the specific saturation magnetization intensity and color properties of the pigments were improved by the addition of Zn2+ in the preparation of Fe3O4, especially, when the value of x is 0.1, the properties of pigment prepared are best, with bigger specific saturation magnetization intensity valued 86.92 A m2 kg−1 and more atrous color with Munsell marking N 0.01 /, and the sample particles are of uniform distribution and nearly spherical shape with the mean size of about 10.1 nm.