Ultrafine metal oxide powders by flame spray pyrolysis

Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

423593, 423625, 423610, C01G 23047, C01F 702, C01F 100

Patent

active

059583614

ABSTRACT:
Ultrafine metal oxide and mixed metal oxide ceramic particles are prepared by flame spray pyrolysis of a ceramic precursor solution containing one or more gycolato polymetallooxanes dissolved in a volatile organic solvent. Recycle of the nanosized particles disposed in additional ceramic precursor solution leads to larger particles. The metal oxide and mixed metal oxide particles may be converted to the respective nitrides by high temperature ammonolysis. The process produces high quality ceramic particles from inexpensive and relatively non-toxic reagents in high space-time yield.

REFERENCES:
patent: 5075090 (1991-12-01), Lewis et al.
patent: 5358695 (1994-10-01), Helble et al.
patent: 5622750 (1997-04-01), Kilian et al.
Chandler,C.D. et al, "Generation of matal titante powders by spray pyrolysis . . ." J. Mater. Chem. 3(7), pp. 775-776, Dec. 1993.
Kim,H. et al, "Preparation of spherical Pb(Zr,Ti)O3 powders by ultrasonic spray pyrolysis" J. Mater. Sci. Mater. Electron. 6(2), pp. 84-89, Feb. 1995.
R.D. Shull, "Viewpoint: Nanocrystalline and Nanophase Materials," Nanostructured Materials, 2 213-16 (1993), no month.
H.Gleiter, "Materials with Ultrafine Microstructures: Retropspectives and Perspectives", Nanostructured Materials, 1, 1-19 (1992), no month.
H. Hahn, Microstructure and Properties of Nanostructured Oxides, Nanostructured Materials, 2, 251-65 (1993), no month.
R. Birringer, H. Gleiter, H.P. Klein, and P. Marquardt, "Nanocrystalline Materials, etc." Pysi. Lett. A., 102, 365 (1984), Jun.
H.Hahn and R.S. Averback, "High Temperature Mechanical Properties of Nanostructured Ceramics," Nanostructured Materials, 1, 95-100 (1992), no month.
A. Gurav, T. Kodas, T. Pluym, Y. Xiong, "Aerosol Processing of Materials", Aerosol Science and Technology, 19, 411-52 (1993), no month.
H.J. Lee, K. Eguchi, and T. Yoshida, "Preparation of Ultrafine Silicon Nitride, and Silicon Nitride and Silicon Carbide Mixed Powders in a Hybrid
K.-H. Kim, C-H Ho, H. Doerr, C. Deshpandey, and R.F. Bunshah, "Ultrafine Aluminum Nitride Powder Produced by Plasma-Assisted Chemical Vapor Desposition of Trimethyl-aluminum," J.Mat.Sci., 27 2580-88 (1992), no month.
S.C. Danforth, "Synthesis and Processing of Ultrafine Powders for Si.sub.3 N.sub.4 Ceramics," Nanostructured Materials, 1, 197-202 (1992), no month.
M.J. Mayo, D.C. Hague, and D-J. Chen, "Processing Nanocrystalline Ceramics for Application in Superplasticity," Mat. Sci. And Eng., A166, 145-59 (1993), no month.
X.Li, H.Zang, J.Guan, L.Ziao, Z.Wang, and M.Zhao, "Synthesis of Nanocrystalline Materials of Composite Oxides Based on BaTiO.sub.3 by Using Stearic Acid-Sol Method," Nanostructured Materials, 2, 457-62 (1993), no month.
G.L. Messing, S-C. Zhang, G.V. Jayanthi, "Ceramic Powder Synthesis by Spray
H. Gleiter, in Deformation of Polycrystals: Mechanisms and Microstructures, N.Hansen, A. Horsewell, T.Leffers, H. Lilholt, eds., Riso Nat'l Lab., Rackilde, Denmark p. 15-21 (1981), no month.
P.R. Strutt, K.E. Gonsalves, T.D. Xiao, "Synthesis of Polymerized Preceramic Nanoparticle Powders by Laser Irradiation of Metalorganic
"Formation of SiO.sub.2, Al.sub.2 O.sub.3, and 3Al.sub.2 O.sub.3 2SiO.sub.2 Particles in a Counterflow Diffusion Flame", S-L Chung, Y-C. Sheu, et al, J.Am. Ceram. Soc. 75, pp. 117-123, no date.
"Aeorsol Synthesis of Aluminum Nitride Powder Using Metalorganic 3209-14 (1992), no month.
"Ultrafine-Grained Dense Monoclinic and Tetragonal Zirconia", G.Skandan, et al, J.Am.Ceram.Soc. 77(7) 1706-10 (1994), no month.
"Submicronic MgAl.sub.2 O.sub.4 Powder Synthesis in Supercritical Ethanol" M.Barj, et al Journal of Materials Science 27 (1992) 2187-2192, no month.
"Formation of Dense and Non-Agglomerated Lead Oxide Particles by Spray Pyrolysis", F.Kirkbir, et al, Journal of Materials Science 27 (1992) 1748-1756, no month.
"Processing of Silicon Carbide-Mullite-Alumina Nanocomposites", Yoshio
"Synthesis of solid, Spherical Zirconia Particles by Spray Pyrolysis", S-C. month.
"Preparation of Monodisperse, Spherical Alumina Powders from Alkoxides", J.
"Synthesis of Submicrometer Mullite Powder via High-Temperature Aerosol (1992), no month.
"Nanostructured Y.sub.2 O.sub.3 : Synthesis and Relation to Microstructure and Properties", G.Skandan, et al, Scripta Metallurgica Et Materialia, vol. 25, pp. 2389-2393 (1991), no month.
"Fabrication of Transparent Y-Al.sub.2 O.sub.3 from Nanosize Particles",
"Selection of Structural Type and Particle Size in Titanium (IV) Oxide", M.Vallet-Regi, et al, J. Mater. Res., vol. 8, No. 9, pp. 2336-2343, Sep. 1993.
"Hydrothermal Preparation of Uniform Nanosize Rutile and Anatase Particles", H. Cheng, et al, Chem. Mater. 1995 7, 663-671, no month.
"Texture Evolution of SnO.sub.2 Synthesized by Pyrolysis of an Aerosol", M. Vallet-Regi, et al, J. Mater. Res., vol. 8, No. 1, Jan. 1993.
"Flame Synthesis of Fine Particles" Gael D. Ulrich, Univ. of New Hampshire, C&EN, Aug. 1984.
"Low-Temperature Creep of Nanocrystalline Titanium (IV) Oxide", H.Hahn and
"Preparation of Fine Multicomponent Oxide Ceramic Powder by a Combustion Synthesis Process" Y. Zhang, G. Stangle, J. Mater. Res., vol. 9, No. 8, pp. 1997-2004, Aug. 1994.
Brochure: Particle Technology, Inc. --Statement of Capabilities, no date.
"Preparation of Small Particle Stabilized Zirconia by Aerosol Pyrolysis" A.R. Pebler, J. Mater. Res., vol. 5, No. 4, pp. 680-682, Apr. 1990.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Ultrafine metal oxide powders by flame spray pyrolysis does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ultrafine metal oxide powders by flame spray pyrolysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrafine metal oxide powders by flame spray pyrolysis will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-699875

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.