US 11,912,578 B2
Low-temperature method for boron carbide production
Cengiz Kaya, Istanbul (TR); and Figen Kaya, Istanbul (TR)
Assigned to SABANCI UNIVERSITESI, Istanbul (TR); YILDIZ TEKNIK UNIVERSITESI, Istanbul (TR); and SABANCI UNIVERSITESI NANOTEKNOLOJI ARASTIRMA VE UYGULAMA MERKEZI SUNUM, Istanbul (TR)
Appl. No. 16/973,769
Filed by SABANCI UNIVERSITESI, Istanbul (TR); YILDIZ TEKNIK UNIVERSITESI, Istanbul (TR); and SABANCI UNIVERSITESI NANOTEKNOLOJI ARASTIRMA VE UYGULAMA MERKEZI SUNUM, Istanbul (TR)
PCT Filed Jun. 13, 2018, PCT No. PCT/TR2018/050310
§ 371(c)(1), (2) Date Dec. 10, 2020,
PCT Pub. No. WO2019/240692, PCT Pub. Date Dec. 19, 2019.
Prior Publication US 2021/0246035 A1, Aug. 12, 2021
Int. Cl. C01B 32/991 (2017.01)
CPC C01B 32/991 (2017.08) [C01P 2004/62 (2013.01); C01P 2004/64 (2013.01)] 19 Claims
 
1. 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.