Molecular decomposition process for the synthesis of nanosize ceramic and metallic powders

Virkar, Anil Vasudeo; Bhide, Sanjeevani Vidyadhar

Title: Molecular decomposition process for the synthesis of nanosize ceramic and metallic powders

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Abstract

A process is disclosed for forming a nanosize ceramic powder. A precursor ceramic material is formed of a fugitive constituent and a non-soluble constituent in a single phase. The precursor is contacted with a selective solvent (water, acid, etc.) to form a solution of the fugitive constituent in the solvent and a residue of the non-soluble constituent. The precursor is sufficiently reactive with the solvent to form the solution of the fugitive constituent in the solvent and form the nondissolved residue of the non-soluble constituent. The precursor material and the non-soluble residue are sufficiently insoluble in the solvent such that there is insufficient precursor material and non-soluble residue in solution to deposit and precipitate upon the residue of the non-soluble-constituent. The fugitive constituent is sufficiently soluble in the solvent such that the precursor reacts with the solvent to form the solution of the fugitive constituent without precipitation and deposition of fugitive constituent upon the residue of the non-soluble constituent in the form of nanosize particles. After the fugitive constituent is dissolved the selective solvent containing the fugitive constituent is removed from the residue. The residue remains in the form of a nanosize powder of the non-soluble constituent.

Inventors:: Virkar, Anil Vasudeo; Bhide, Sanjeevani Vidyadhar

Issue Date:: 2004-10-12

Research Org.:: Univ. of Utah, Salt Lake City, UT (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1531824

Patent Number(s):: 6803027

Application Number:: 09/830,399

Assignee:: University of Utah Research Foundation (Salt Lake City, UT)

Patent Classifications (CPCs):: C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

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C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
C01G23/053 - Producing by wet processes, e.g. hydrolysing titanium salts

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B2235/3213 - Strontium oxides or oxide-forming salts thereof

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
C01F17/206 - oxide or hydroxide being the only anion

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
C01B13/14 - Methods for preparing oxides or hydroxides in general

B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
B82Y30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B2235/528 - Spheres
C04B35/50 - based on rare-earth compounds {

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
C01G37/02 - Oxides or hydrates thereof

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
C01F17/241 - containing two or more rare earth metals, e.g. NdPrO3 or LaNdPrO3

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B2235/3225 - Yttrium oxide or oxide-forming salts thereof

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
C01P2002/34 - perovskite-type

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
C01G25/02 - Oxides
C01G23/047 - Titanium dioxide

B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
B22F1/0018 - {Nanometer sized particles}

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
C01G37/033 - Chromium trioxide

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B2235/3215 - Barium oxides or oxide-forming salts thereof

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
C01F7/02 - Aluminium oxide

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
C01P2002/52 - containing elements as dopants

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
C01G31/02 - Oxides

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
C01P2002/72 - by d-values or two theta-values, e.g. as X-ray diagram

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B2235/3229 - Cerium oxides or oxide-forming salts thereof

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
C01P2004/64 - Nanometer sized, i.e. from 1-100 nanometer

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B35/6261 - {Milling}

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
C01F17/235 - Cerium oxides or hydroxides

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B2235/3224 - Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
C01P2004/03 - obtained by SEM

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B35/48 - based on zirconium or hafnium oxides, zirconates, {zircon} or hafnates
C04B35/62625 - {Wet mixtures}

B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
B22F9/16 - using chemical processes

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DOE Contract Number:: FG03-97ER45661

Resource Type:: Patent

Resource Relation:: Patent File Date: 2001-08-13

Country of Publication:: United States

Language:: English

Citation Formats


                    Virkar, Anil Vasudeo, and Bhide, Sanjeevani Vidyadhar. Molecular decomposition process for the synthesis of nanosize ceramic and metallic powders.  United States: N. p., 2004. 
        Web.

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                    Virkar, Anil Vasudeo, & Bhide, Sanjeevani Vidyadhar. Molecular decomposition process for the synthesis of nanosize ceramic and metallic powders.  United States.

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                    Virkar, Anil Vasudeo, and Bhide, Sanjeevani Vidyadhar. Tue .  
        "Molecular decomposition process for the synthesis of nanosize ceramic and metallic powders".  United States.  https://www.osti.gov/servlets/purl/1531824.

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@article{osti_1531824,

  title        = {Molecular decomposition process for the synthesis of nanosize ceramic and metallic powders},

  author       = {Virkar, Anil Vasudeo and Bhide, Sanjeevani Vidyadhar},

  abstractNote = {A process is disclosed for forming a nanosize ceramic powder. A precursor ceramic material is formed of a fugitive constituent and a non-soluble constituent in a single phase. The precursor is contacted with a selective solvent (water, acid, etc.) to form a solution of the fugitive constituent in the solvent and a residue of the non-soluble constituent. The precursor is sufficiently reactive with the solvent to form the solution of the fugitive constituent in the solvent and form the nondissolved residue of the non-soluble constituent. The precursor material and the non-soluble residue are sufficiently insoluble in the solvent such that there is insufficient precursor material and non-soluble residue in solution to deposit and precipitate upon the residue of the non-soluble-constituent. The fugitive constituent is sufficiently soluble in the solvent such that the precursor reacts with the solvent to form the solution of the fugitive constituent without precipitation and deposition of fugitive constituent upon the residue of the non-soluble constituent in the form of nanosize particles. After the fugitive constituent is dissolved the selective solvent containing the fugitive constituent is removed from the residue. The residue remains in the form of a nanosize powder of the non-soluble constituent.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2004},

  month        = {10}

}

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