Method for synthesizing titanium diboride powder
OwnerMangesh Ramesh AVHAD, Emmanuel NONNET +1inventors
InventorsMangesh Ramesh AVHAD, Emmanuel NONNET, Laurie SAN-MIGUEL
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Abstract
A method for synthesizing a TiB2 powder includes the reduction of titanium oxide by carbon in the presence of a source of boron, the method includes heating a mixture of a carbon source, a boron carbide powder whose median particle diameter is between 5 and 100 microns and a powder of titanium oxide whose median particle diameter is between 5 and 80 microns, the mixture being placed in an enclosure under an inert gas sweep flow rate between 0.5 and 10 L/min/m/m3 of enclosure at a temperature of between 1500° C. and 2000° C., as well as the TiB2 powder obtained by such a method.
Claims20
A method for manufacturing a TiB2 powder, comprising reducing titanium oxide by carbon in the presence of a source of boron, said method comprising heating a mixture of raw materials consisting of:
- a) a titanium oxide (TiO2) powder, and
- b) a carbon source, and
- c) a boron carbide powder,
- at a temperature above 1500° C. and below 2000° C.,
- in respective proportions leading to the reduction of the titanium oxide to titanium boride according to the balance reaction:
- 2TiO2+B4C+3C→2TiB2+4CO (2)
- wherein:
- a median particle diameter of the boron carbide powder is between 5 and 100 microns, and
- a median particle diameter of the titanium oxide powder is between 5 and 80 microns, and
- an excess boron carbide is less than 5% by mass relative to the stoichiometric amount necessary for the reaction (2)
- the synthesis is carried out in an enclosure under an inert gas flow,
- a flow rate of the inert gas flow in said enclosure is between 0.5 and 10 L/min per m3 of enclosure.
Dependencies are inferred from the claim text.