Uniform nano BaSO4 quasispheres were prepared by precipitation reaction with barium chloride and sodium sulfate as raw materials in reverse microemulsion composed of aqueous solution/TritonX-100/n-hexanol/cyclohexane. The product was characterized by XRD (X-ray diffraction)

SEM (scanning electron microscope)

TEM (transmission electron microscope) and FTIR (Fourier transform infrared spectroscopy). The effects of three reaction modes

[H2O]/[Triton X-100] molar ratio (R)

reactant concentration and[co-surfactants]/[surfactants] molar ratio (P) on the size and morphology of BaSO4 quasispheres were investigated. At the same time

the effects of the R on the size and size distribution of micro-emulsion droplets were investigated by dynamic light scattering (DLS). The results show that under room temperature

using double microemulsion method

R=17.97

P between 2.11-4.22 is the best reaction condition for the synthesis of BaSO4 quasispheres

and the reactant concentration had little effect on the size and morphology of BaSO4 quasispheres. Under the reaction conditions

the size of BaSO4 nano-quasispheres was 18-22 nm

and the yield was 87.5%.