Silicon-based polymer-derived ceramic composites comprising H-BN nanosheets
AssigneeKansas State University Research Foundation
InventorsGurpreet Singh, Lamuel David
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Abstract
Polymer-derived ceramic composites are described herein. The composites are formed using hexagonal boron nitride nanosheet-functionalized silicon-based ceramic precursor polymers. The composites a matrix of a polymer-derived ceramic and hexagonal boron nitride nanosheets embedded therein. Silicon-derived ceramic precursors such as polysilazane and/or polysiloxane are used to create improved SiCN and/or SiOC ceramic composites.
Claims18
A ceramic composite comprising a matrix of a polymer-derived ceramic and hexagonal boron nitride nanosheets embedded therein, wherein said polymer-derived ceramic is selected from the group consisting of SiCN, SiOC, and combinations thereof.
A method of forming a polymer-derived ceramic, said method comprising:
- providing a functionalized precursor compound mixture comprising a liquid-phase, silicon-based ceramic precursor compound and hexagonal boron nitride nanosheets;
- crosslinking said functionalized precursor compound to yield a pre-ceramic composite comprising a crosslinked matrix of said silicon-based ceramic precursor compound and hexagonal boron nitride nanosheets;
- and
- converting said silicon-based ceramic precursor compound to ceramic to yield a ceramic composite comprising a polymer-derived ceramic matrix and hexagonal boron nitride nanosheets embedded therein.
A powdered composition comprising a plurality of free-flowing particulates, each of said particulates consisting of ceramic composites comprising a matrix of polymer-derived ceramic and hexagonal boron nitride nanosheets embedded therein, wherein said polymer-derived ceramic is SiCN, said powdered composition having a four-point electrical conductivity of at least 0.115 S/cm.
Dependencies are inferred from the claim text.