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US 9,840,443 B2Granted
Processing of non-oxide ceramics from sol-gel methods
AssigneeLawrence Livermore National Laboratory, LLC
InventorsRichard Landingham, Robert A. Reibold, Joe Satcher
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Abstract
A general procedure applied to a variety of sol-gel precursors and solvent systems for preparing and controlling homogeneous dispersions of very small particles within each other. Fine homogenous dispersions processed at elevated temperatures and controlled atmospheres make a ceramic powder to be consolidated into a component by standard commercial means: sinter, hot press, hot isostatic pressing (HIP), hot/cold extrusion, spark plasma sinter (SPS), etc.
Claims36
A method, comprising:
- a) forming an intimate mixture of an inorganic oxide and an organic polymer,
- b) reaction heat treating the mixture to form particles of a non-oxide ceramic;
- and
- c) consolidating the particles into a solid ceramic object,
- wherein the solid ceramic object is characterized by a domain size of 100 nm or less wherein the organic polymer comprises a copolymer of an aldehyde and a mono-, di-, or trihydroxy substituted aromatic ring.
2 more elements
A method comprising
- a) reacting first starting monomers of a first sol gel in a solution;
- b) reacting second starting monomers of a second sol gel in the solution;
- c) reacting the first and second starting monomers until at least one of the first sol gel and second sol gel is formed in the solution to form a gel mixture;
- d) removing solvent from the gel mixture to form a mixture of inorganic oxide and organic polymer;
- and
- e) reaction heat treating the mixture to form particles of a non-oxide ceramic selected from carbides, nitrides, and borides, wherein the first sol gel comprises an inorganic sol gel and the second sol gel comprises a copolymer of an aldehyde and a mono-, di-, or trihydroxy substituted aromatic ring.
3 more elements
A method comprising
- a) forming a first gel comprising an inorganic oxide in a solution;
- b) forming an second gel comprising an organic polymer in the solution to form a gel mixture;
- c) removing solvent from the gel mixture to form a mixture of an inorganic oxide and organic polymer;
- and
- d) reaction heat treating the mixture to form particles of a non-oxide ceramic selected from carbides, nitrides, and borides, wherein the organic polymer comprises a copolymer of an aldehyde and a mono-, di-, or trihydroxy substituted aromatic ring.
2 more elements
Dependencies are inferred from the claim text.