NOVEL METAL ALKOXIDES AS PRECURSORS FOR CERAMIC MATERIALS Sandia National Laboratories has developed a robust and versatile approach to fabricating complex ceramic oxides (perovskites and related compounds) from a family of inorganic precursors. Using the patented BRP process (Basic Route to Pervoskites), tailor-made inorganic precursors have been synthesized, characterized and used to produce a wide range of electronic ceramic materials. The focus of this work has been on, but is not limited to, developing novel metal alkoxide complexes which have been introduced into unique precursors solutions for producing powders and thin-film materials with controlled properties. Compounds developed to date are unique and are not commercially available. Applications Cathode materials for lithium batteries including pure and dope mixtures of LiMn2O4 and LiCoO2,. Ferroelectric thin films for non-volatile memories made at the lowest reported processing temperatures, for improved integration, and acceptor or donor levels not approachable with other methods. High dielectricconstant films produced at low processing temperatures. Thin-film catalysts and high-TC superconductors Potential Benefits In depth understanding and characterization of the various systems investigated permits the use of designer molecules to reduce synthesis time, improve solution stability, lower processing temperatures, and reduce heat-treatment times. This approach can also facilitate uniform incorporation of dopants, improve microstructures and material properties, and generate new or simpler routes to fabricating materials. BRP Solution Route Advantage 1. Uses commercially available precursors. 2. Solution preparation requires only mixing (no additional heating required). 3. Can be synthesized under ambient conditions. 4. High levels or trace levels of dopants are possible. 5. Lower processing temperatures typically obtained. 6. Computer modeling possible due to the "simplicity" of the system. Demonstrated Achievements Developed a novel "all-alkoxide route" to generate layered-perovskite materials(SrBi2Ta2O9) at a processing temperature of only 550oC, which was more than 50*C lower than previously reported. The alkoxide precursors consist of unique metal neo-pentoxide compounds synthesized and characterized exclusively at Sandia National Laboratories. This process has been transferred to an industrial licensee. Hundreds of other novel inorganic compounds have been produced that are not commercially available. References Twelve patented or patent pending processes that reduce or improve the synthesis of a wide range of materials. Numerous publications (available upon request), conference presentations and invited lectures. Sandia is interested in partnering with industry to further develop reliability and failure analysis of glass and ceramic components. Companies interested in partnering with Sandia should be willing to sponsor a collaborative project via a Cooperative Research and Development Agreement (CRADA) with Sandia. For further information please respond by mail or fax to Sheila Pounds by June 23, 1999 at Sandia National Laboratories, MS-1380, P. O. Box 5800, Albuquerque, New Mexico 87185-1380. Fax: (505) 843-4163. Please indicate the date and title of this CBD notice. E-MAIL: Sheila L. Pounds, slpound@sandia.gov. Posted 06/09/99 (W-SN340923).

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