US 11,306,002 B2 · Process for synthesis of MG2SI/MGO nanocomposites

Abstract

The present invention relates to a process for the synthesis of a composite material comprising steps of: (a) reacting gaseous magnesium (Mg) and silica (SiO2) in an inert atmosphere; (b) washing the product obtained in step (a) in an acidic medium; and (c) reacting further gaseous magnesium (Mg) with the silica (SiO2) and silicon (Si) product obtained in step (b). The process of the invention allows Mg2Si/MgO nanocomposites to be prepared without too many separate steps, and wherein the MgO phase is homogeneously dispersed within the Mg2Si matrix. The nanocomposites obtained may for example find practical application as thermoelectric materials in thermoelectric generators.

Claims17

Dependent claims

A process for the synthesis of a composite material comprising the steps of:

(a) reacting gaseous magnesium (Mg) and silica (SiO2) at a temperature of at least 500° C. and at most 1200° C. in an inert atmosphere;
(b) washing the product obtained in step (a) in an acidic medium until neutralization is achieved to obtain a product containing the silica (SiO2) and silicon (Si);
and
(c) reacting further gaseous magnesium (Mg) with the product obtained in step (b) at a temperature of at least 500° C. and at most 1200° C. in an inert atmosphere.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

16/491,741Filed 7 Mar 2017

Published

US 2021/0130175 A16 May 2021

Granted

19 Apr 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

C01B 33/06
Silicon; Compounds thereof: metal silicides
C01B 33/023
Preparation: by reduction of silica or free silica-containing material
C01F 5/02
Compounds of magnesium: magnesia
B82Y 40/00
Manufacture or treatment of nanostructures

Process for synthesis of MG2SI/MGO nanocomposites

Life of this patent

Process for synthesis of MG2SI/MGO nanocomposites

Life of this patent

Abstract

Claims17