Synthesis of BXNYCZ powder coating under concentrate light

• High-temperature gradients promote formation of varying phase composition of coating.
• Produced BXNYCZ coating has phase composition based on carbon and on boron nitride.
• Incorporation carbon to BN and boron in carbon layer result in formation composition.
• Produced in an optical furnace nonuniform coating consists of particles of 10–500 nm.
• The BXNYCZ coating increase the performance range in electro redox process.

The aim of this study was to elucidate conditions that determine properties of BXNYCZ nanostructure powder coating. Produced in a xenon high-flux optical furnace in a flow of nitrogen coating is nonuniform, does not cover all surface and consists from equiaxed particles of sizes 10–500 nm. High-temperature gradients promote the formation of a continuously varying phase composition of coating depending on the particle size. The largest particles of coating display two types of the powder precipitates: based on carbon and based on boron nitride. Phase composition of the largest particles includes different graphite phases with a prevalence of amorphous carbon, hexagonal BN and (BN)0,26C0,74, rhombohedral B4C and B10C. Raman spectroscopy has confirmed incorporation of carbon to h-BN powder and formation structures with boron in carbon layers and carbon in BN layers, respectively. Obtained powder coating was used in an electroreduction process for measuring oxygen dissolved in a liquid.