초록 ▼

A method for preparing substrates for VLS fiber producing reactions and a method for preparing SiC fibers by the VLS process. The first method includes the steps of forming an alcohol sol containing a fiber growth promoter material precursor, applying the sol to at least one surface of the substrate

A method for preparing substrates for VLS fiber producing reactions and a method for preparing SiC fibers by the VLS process. The first method includes the steps of forming an alcohol sol containing a fiber growth promoter material precursor, applying the sol to at least one surface of the substrate and drying the sol. More particularly, the steps can include forming a sol of colloidal hydrous metal oxide particles in a liquid, the metal oxide being a fiber growth promoter material precursor and the liquid being capable of dissolving a salt of the metal and of wetting the substrate surface as a sol, applying the sol to at least one surface of the substrate and drying the sol. The method for the production of SiC fibers includes the steps of applying to at least one surface of a non-metallic, high temperature resistant substrate a sol coating containing a SiC fiber growth promoter material precursor, drying the sol coating and contacting the substrate with silicon and carbon containing gases at a temperature of about 1300°C. to about 1500°C.

대표청구항 ▼

A method of preparing a non-metallic, high temperature resistant substrate for a VLS fiber producing reaction comprising the steps of: forming a solution of a metal salt in an alcohol; adding a base to said solution to precipitate out a colloidal suspension of hydrous metal oxide catalyst precursor

A method of preparing a non-metallic, high temperature resistant substrate for a VLS fiber producing reaction comprising the steps of: forming a solution of a metal salt in an alcohol; adding a base to said solution to precipitate out a colloidal suspension of hydrous metal oxide catalyst precursor particles to form an alcohol sol capable of wetting the substrate and forming catalyst particles having an average size of at least about 20 microns during the subsequent VLS fiber producing reaction; applying said sol to at least one surface of the substrate; and drying said sol.