초록 ▼

This invention pertains to a method for production of polycrystalline ceramic fibers from silicon oxycarbide (SiCO) ceramic fibers wherein the method comprises heating an amorphous ceramic fiber containing silicon and carbon in an inert environment comprising a boron oxide and carbon monoxide at a t

This invention pertains to a method for production of polycrystalline ceramic fibers from silicon oxycarbide (SiCO) ceramic fibers wherein the method comprises heating an amorphous ceramic fiber containing silicon and carbon in an inert environment comprising a boron oxide and carbon monoxide at a temperature sufficient to convert the amorphous ceramic fiber to a polycrystalline ceramic fiber. By having carbon monoxide present during the heating of the ceramic fiber, it is possible to achieve higher production rates on a continuous process.

대표청구항 ▼

[ What is claimed is:] [10.] A method for the production of polycrystalline ceramic fibers wherein the method comprisesheating an amorphous ceramic fiber comprised of silicon and carbon in an environment to which a boron oxide and carbon monoxide have been added at a temperature of 1400.degree. C. t

[ What is claimed is:] [10.] A method for the production of polycrystalline ceramic fibers wherein the method comprisesheating an amorphous ceramic fiber comprised of silicon and carbon in an environment to which a boron oxide and carbon monoxide have been added at a temperature of 1400.degree. C. to 2200.degree. C. for a time sufficient to incorporate boron oxide into the ceramic fiber and substantially remove any volatile elements from the fiber, said carbon monoxide being added by purging said environment with a purge gas comprising carbon monoxide; andthereafter heating the ceramic fiber with the boron oxide incorporated therein at a temperature of 1800.degree. C. to 2200.degree. C. in an inert environment to convert the ceramic fiber to a polycrystalline ceramic fiber.