Abstract: Using sodium hyposulfite as sulphur source,the preparation of nano-sized zinc sulphide with different sizes was studied by homogeneous precipitation method,the influences of reaction conditions,such as reaction temperature,heating mode,concentration,and amount-of-substance ratio of the reactants，on nano-sized zinc sulphide sizes were discussed.Results showed that through controlling the preparation conditions,cubical nano-sized zinc sulphide with the average size at 4~24 nm can be prepared by homogeneous precipitation,and its shape was approximative spherical;preparation conditions had notable effect on the sizes of nano-sized zinc sulphide;effect of heating modes on the sizes was remarkable,and the particle size was larger through water bath heating than that through microwave;furthermore，the size of nano-sized zinc sulphide particle decreased with the decreasing of the amount-of-substance ratio of zinc acetate to sodium hyposulfite,with the increasing of reaction temperature and concentration of reactants.

Key words: nano-sized zinc sulphide, homogeneous precipitation, sodium hyposulfite, microwave