(235b) Preparation of Ceramic Nanoparticles Using Hf Plasma and Their Applications

Nanoparticles are at the forefront of the nanotechnology wave. The preparation and application challenge of nanoparticles include how to achieve in large scale with controllable size, size distribution, morphology and low cost, as well as how to be dispersed homogeneously into slurry, coating or even polymeric matrix. Among the different routes to manufacture nanoparticles, gas phase synthesis has been more and more applied in the large scale production. Our institute has developed the plasma technique to produce ultrafine ceramic powders and progressively nanoparticles since 1973 and now became one of the nanoparticles research centers in China. In this presentation, we will firstly report our recent encouraging results in the large scale production (50-100Kg/day) of nanosized ceramic particles (average particle size<80nm, with narrow size distribution measured using Laser Particle Sizer) such as SiO2, TiO2, ZrO2, SiC, Si3N4 in the designed high-frequency plasma reactor using SiCl4, TiCl4, ZrOCl2 as precursor in oxygen, CO and N2 atmosphere respectively. Then will explain our chemical precipitation-plasma pyrolysis processes for preparing nanosized ZnO, Al2O3, MoO2 particles using inorganic salt solution and ammonia as raw materials. Lastly, we will introduce our developed equipments based on the spray drier for surface polymer-modification of nanoparticles as well as the typical commercial products (e.g. paintings, functional coatings) involving the introduction of our products.