Microemulsion Synthesis Of Nano (bio) Ceramic Powder (zro <sub> 2 </ Sub>, Sio <sub> 2 </ Sub>),

In this paper, preparation of inorganic nanometer powders with liquid phase method and modification was studied. The formation of microemulsion was investigated; the microemulsion system of silicate solution, cyclohexane, OP-10, and n-pentanol was selected to prepare nanometer silica particles, and the modification and application in biology of nanometer silica particles were studied; nanometer ZrO2 and ZrO2-CaO particles were prepared by microemulsion method and chemical co-precipitation method, the effect of adulteration on ZrO2 phase stabilization was studied; the effects of a series of conditions especially azeotropic distillation on the property of powders were studied, the powders were characterized.The research indicated that: The microemulsion system of silicate solution, cyclohexane, OP-10, and deionizing water can be selected to prepare inorganic nanometer powders experimentally; nanometer silica particles with the size 15~30nm and the specific surface area of powder is up to 400~650m2/g were prepared with the microemulsion system of silicate solution, cyclohexane, OP-10, and n-pentanol; nanometer silica particles modified by silane coupling agent had gained a little effect, nanometer poly-L-lysine/SiO2 composite carrier could transfer DNA into HNE1 cell efficiently and get good green fluorescent protein expression.The size of nanometer ZrO2 particles smaller than 40nm were prepared by microemulsion reaction method, where the microemulsion system includes ZrOCl2-8H2O solution, n-pentanol, OP-10, and cycloherane; with zirconium oxychloride and amonium as the raw materials, nanometer ZrO2-CaO particles were prepared by chemical co-precipitation method under the doping of nitrate of lime and azeotropic distillation, the stable region of tetragonal phase is from 600℃ to 1100℃, nanometer ZrO2-CaO particles by microemulsion method and calcined at 1000℃ were all cube phase structure; the azeotropic distillation process could effectively dehydrate hydrous inorganic nanometer powders and prevent the formation of the hardagglomerates during the evaporation.