Ultrasonic preparation of nano-barium sulfate and the effect factors

Nano-barium sulfate was prepared with ultrasonic,and the influence of feeding methods,the reaction medium,reactant concentration,ultrasonic power ratio,ultrasonic response time,reaction temperature in the preparation process on the particle size of the product appearance was studied.The particle size was characterized by Laser granulometer and scanning electron microscopy.The experimental results show that average particle size of nano-barium sulfate is 55 nm with anhydrous ethanol as the reaction medium when reactant concentration is 0.25 mol/L,feeding methods are adopted simultaneously,ultrasonic power ratio is 40%,reactant temperature is 30 ℃ and ultrasonic dispersion time is 15 min.The distribution of the particle size is narrow and it is in irregular spherical shape.