Low-temperature method for boron carbide production
AssigneesSabanci Universitesi, Yildiz Teknik Universitesi, Sabanci Universitesi Nanoteknoloji Arastirma Ve Uygulama Merkezi Sunum
InventorsCengiz Kaya, Figen Kaya
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Abstract
A production method of boron carbide nano-sized particles and/or submicron particles includes the following sequential steps: obtention of a fluid mixture including elemental boron, glycerin and one or more carboxylic acid, wherein a molar ratio of glycerin to the one or more carboxylic acids is within a range between 10:1 and 10:7.5. Heating of the fluid mixture to obtain a first mid-product in a form of a gel including borate ester bonds. Solidification of the first mid-product by heating a reaction product to obtain a second mid-product in solid form. Sintering the second mid-product to obtain boron carbide in a form of particles.
Claims19
A method for a production of boron carbide nano-sized particles and/or submicron-sized particles, comprising the following sequential steps:
- a) preparing a fluid mixture comprising elemental boron, glycerin and one or more carboxylic acids, wherein a molar ratio of the glycerin to the one or more carboxylic acids is within a range between 10:1 and 10:7.5,
- b) keeping the fluid mixture at a temperature within a range between 100° C. and 290° C. to obtain a first mid-product,
- c) performing a solidification on the first mid-product by heating the first-mid product to a temperature within a range between 350° C. and 750° C. to obtain a second mid-product in a solid form,
- d) sintering the second mid-product at a temperature of 1250° C. or higher to obtain the boron carbide nano-sized particles and/or submicron-sized particles.
Dependencies are inferred from the claim text.