IDEA #4Y5BEP Oxide Nanompowders For Advanced Medical And Industrial Applications

NEW(cid:3)MATERIALS(cid:3)AND(cid:3)NANOTECHNOLOGY OXIDE NANOMPOWDERS FOR ADVANCED MEDICAL AND INDUSTRIAL APPLICATIONS Description Technology of obtaining oxide nanopowders with speci$fied chemical, phase and granulometric composition is based on wet$chemicals methods with the use MW radiation, pulse magnetic field and ultrasonic for agglomeration prevention. We obtain ZrO2 (0–8 % Y2O3) powders with prede$ termined particle size in the range from 5 to 30 nm, narrow size distribution and specific surface area 140–20 m2/g, respectively with soft agglomerates for ceramics, compos$i$ tes and SOFC applications. We obtained TiO2 (anatase) powders with predeter$ mined particle size in the range from 5 to 25 nm, narrow size distribution, specific surface area from 150 to 50 m2/g and soft agglomerates for catalyst and UV$protects and TiO2 (rutile) powders with particle size 30–50 nm. We obtained LaSrMnO3 powders with narrow size distribution (12–15 nm) and bimodal size distribution (40,200 nm) for magnetic sensors and SOFC cathodes, and other oxide powders (PZT, Al2O3 based, for example). We have a pilot line for nanopowders obtaining. We also obtain zirconia and/or alumina ceramics with small grains for wear$resistant, structural, instrumental and functional applications. Porous ceramics obtained can be used in medicine, catalysts, filters and SOFC electrodes. We can ob$ tain nanocomposites with metal, ceramics and polymer matrix. We obtain PZT ceramics. Innovative Aspect and Main Advantages The main advantages of our technology are: – more narrow particle size distribution; – – – – – – – – lower degree of agglomeration; predetermined particle sizes in the range of 5 to 50 nm; high homogenious component distribution; low synthesis temperature (400–700 °C); eliminating the mechanical grinding stage; easy scale$up in manufacturing; low sintering temperature (1250–1350 °C) high performance of ceramics including homogenity, stability and durability; lifetime of ceramics mine pump plunger from zirconia nanopowders is 15–20 times longer than usually production of precise articles and films; lower cost, environmentally friendly; lower energy consumption. – – – – Areas of Application Power Engineering – SOFC, thermal stable coatings for turbine blades; 44 Fig. 1. Structure of 3Y ZrO2 powders Fig. 2. Ceramic details Mining Industry – rods, plungers, injectors; Chemical Industry – parts of pumps (breechblocks, valves, plungers) injectors, milling balls, catalysts, sorbents; Metallurgy – refractory structural elements, cutting tools, guides, crucibles; Medicine – prosthetic appliances, filters, ion$exchangers, UV$protect, capsules. Stage of Development Tested, available for demonstration, field tested. Contact Details Material Science department Donetsk Institute of Physics & Engineering National Academy of Sciences of Ukraine Str. R. Luxemburg 72, Donetsk 83114, Ukraine Konstantinova Tetyana Evgenevna (062) 311$11$21 (062) 337$75$13 tatjana@konstant.fti.ac.donetsk.ua www.donphti.ac.donetsk.ua SCIENCE AND INNOVATION. № 4, 2006