To Business Dev. Director |
| 04-11 22:34:22 来源： 作者： |
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To Business Dev. Director Inquiry (采购产品): To Business Dev. Director Technology Fact Sheet January 2006 INEXPENSIVE, SCALABLE PROCESS FOR RAPID PRODUCTION OF NANOSIZE POWDERS The new patented technology described in this non-confidential Fact Sheet is being developed at the University of Utah, Center of Excellence for Nano Sized Powders. The inventors are seeking commercial partners. Technology Snapshot This invention is a new approach for the synthesis of nanosized powders based on a molecular decomposition. The method has successfully produced a wide range of metal oxides. With future development, the process may also be used to produce metal powders, nitrides, borides and carbides. Compared to other production techniques for nanosize powders, this process uses simple and inexpensive production equipment and can be readily scaled for mass production quantities. The method is rapid, environment friendly and yields powders of homogeneous compositions, highly controllable sizes with tight distribution, and high purity. Patented Process Can Produce: Process Benefits: ? Oxide Ceramics ? Simple, inexpensive process and equipment ? Complex Oxides ? Readily scalable for mass production Examples: ZrO2, TiO2, CeO2, BaTiO3, ? Complex, custom powders can be made Fe2O3, Yttrium doped ZrO2, ? Highly controllable particle size ; ? Narrow size distribution ? Powders: Dry or as liquid suspensions Lanthanum doped CeO2 ? Environment friendly process Technology Feature and Competitive Analysis with Current Technologies There are several technologies currently available for producing nano-particles. They are based on mechanical milling, vapor condensation, laser ablation, plasma techniques, sol-gel processing, combustion synthesis, chemical precipitation and spray pyrolysis. Many of these are very expensive while others produce hard agglomerates in the range of 30 to 50 nano-meters because the process does not have enough control over particle growth. The University of Utah technology overcomes these drawbacks as shown in Table 1 below. Table I – Competitive Analysis Technology Feature U of U Product Competitor 1 (Vapor phase synthesis) Competitor 2 (Colloidal synthesis) Competitor 3 (Spray hydrolysis) Competitor 4 (Electro synthesis) High surface area powders Yes Yes Yes No Yes Nano size crystallites Yes Yes Yes No Yes Low-cost oxide or precursors Yes No No No No Low-cost equipment Yes No Yes No No Powders: dry or as liquid suspensions Yes Yes No No Yes Nanostructured surface layers Yes No No No Yes Nanoporous, sensors Yes No No No No Uniform Product in the 4-8 nm range: The simplicity of equipment and the use of low cost precursors make the U of U process relatively inexpensive. A process of ‘molecular decomposition’ as opposed to ‘molecular synthesis’ prevents particle growth thereby it produces a very fine crystallite sizes (4 – 8nm), as demonstrated by the broad X-ray diffraction peaks (Fig. 1A). In comparison, the X-ray peaks for a competitors samples are sharper indicating much larger crytallite sizes (Fig. 1B). Powders can be supplied dry or as liquid suspensions. The University of Utah process is also capable of producing nano-structured surface layers (Fig. 2) which have applications in state of the art sensors and catalytic membranes. Product characteristics The product consists of extremely fine, individual (Fig. 3A) or loosely agglomerated crystallites in the 4-8nm (Fig. 3B) range. The uniformity (narrow size distribution) of size is also evident in Fig. 3B. The fine particle size imparts transparency in applications such as UV blocking coatings. As a consequence of the fine particle size the nano-powders also have a high surface area per unit mass and this coupled with the uniformity of size leads to very efficient surface coverage which is advantageous in applications such as coatings, paints and catalysis. Typical powder characteristics 1. Surface Area (m2/gm) 60 – 110 2. Crystallite size (nm)-From X-ray line broadening 4 – 8 3. Average particle size (nm) –From BET 12 – 15 4. Purity (%) 98 to 99.99 Potential Applications Table II proves the consistency of the University of Utah process. The nano-particles have large surface area and consistent size that can enhance applications; such as, catalysis, membranes, fuel cells, sensors, coatings and optics. Table II - Nano Powder Characteristics and Applications Nano Powder Typical Potential Applications Nano Powder Surface Area (m2/g) Average Crystallite Size by XRD (nm) Yttria Stabilized ZrO2 (YSZ) Solid oxide fuel cells, thermal barrier coatings, dental fillings 66 3 Cerium oxide CeO2 Catalyst support, fuel cells, chemical mechanical polishing 70 2 Lanthanum Doped CeO2 Fuel cells, catalyst support 73 2 Samarium Doped CeO2 Fuel cells, catalyst support 70 2 Barium Titanate BaTiO3 Dielectrics, multilayer capacitors 65 20 Titanium Oxide TiO2 Sunscreens, paints, membranes 112 5 Iron Oxide Fe2O3 Magnetic memory, pigments 60 20 Average crystallite size by XRD is obtained by measurement of half peak widths of individual peaks of the X-ray diffraction patterns of the powders. Sample sizes to a maximum of 100 gms could be supplied on request for trials and evaluation. Specific compositions can be synthesized on request. Contact Information: The University of Utah is seeking commercial partners to advance the technology to product applications and markets. If you have an interest in this process please contact us as noted below. Technical Commercial Prof. Anil Virkar Dr. Niladri Dasgupta Dale S. Richards Bob Ramsay Ph: 801-581-6863 Ph:801-581-6865 Ph:801-299-9902 Ph: 801-755-9730 Fax: 801-581-4816 Fax: 801-581-4816 Fax: 801-299-9900 Email: rramseypg@networld.com Email: Anil.Virkar@m.cc.utah.edu Email: n.dasgupta@utah.edu Email: excelDSR@AOL.com **** Hidden Message ***** dale richards 84010 USA Company: Excel Management Title: President E-mail: exceldsr@aol.com **** Hidden Message ***** exceldsr@aol.com |
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