Supercritical Fluid Extraction For Fine Particles
The development of ultrafine Particles, specially namio-particies, has become a popular areain the current high-tech.
It has obtained vide applications in the field of the material, chemical, light industry,matallurgy, electronics, biology and medicine.
There are a variety of way to fabricate ultrafine particles.
Supercritical fluid deposition is new developing techonlogy. Through reducing the pressure of the supercritical solution, high saturation degree can be reached in very short time.
Then, ultrafine particlescan be precipitated uniformly because this process is conducted in quasi-uniform media. the size and size distribution of the particle can be controlled easily.
Thus supercritical deposition technique is a new promising technology for producing ultrafine particles. Currently several different supercritical fluid models have been raised, such as: GAS, SAS, SESS,SEDS, PGSS, etc