Synthesis of non-oxides

Only compounds of the two last families are used for preparing ceramics. These products are synthesized industrially according to various methods, the choice of the process depending on certain criteria purity, crystalline state, morphology of the powder. 

Carbides can be obtained by direct synthesis at high temperature by mixing 

After the carburization stage, the products are groimd. This process, which is the oldest, does not yield fine powders. 

The carboreduction of oxides is the most developed production method  

Grinding is also necessary, followed by a chemical treatment to eliminate oxide traces that very often play a harmful role dxtring sintering. Thus, for the second example, after washing with hydrofluoric acid, the powder contains 98-99% of SiC, with iron as the main impirrity. 

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Solvothermal method has been used in synthesis of a series of non-oxide nanomaterials, such as semiconductors [1,2], ceramic materials [3], and in fabricating special nanostructures [4]. It will be an exciting, promising field for designing and preparing advanced materials in the future. This paper focuses on some aspects of recent progress in solvothermal synthesis of non-oxides nanomaterials. 

Recently, the synthesis of crystalline tungsten oxide nanoparticles within benzyl alcohol droplets was achieved by using microwave dielectric heating of non-aqueous droplets in a microfluidic device with a reaction time of just 64 ms [112]. The microwave-assisted nonaqueous routes are also relevant for the synthesis of non-oxide nanomaterials such as metals and metal chalcogenides [113]. 

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