Nano-sized boron synthesis process towards the large scale production

The Influence of Wire Heat Treatment on PIT <inline-formula> <tex-math notation="TeX">$\hbox{MgB}_{2}$</tex-math></inline-formula> Conductors Manufactured Using Laboratory-Made Boron

“…This also allows innovative techniques to be used which gives optimized B and MgB 2 powders with the desired properties, useful for superconducting application. Our research group developed a new procedure by adding several preliminary steps to the typical Moissan's process [13], [14]. Using this method we are able to synthesize nanosized B powder with an average grain size between 60 to 120 nm [15].…”

Melt-assisted solid flame synthesis approach to amorphous boron nanoparticles

“…The gas-phase and liquid synthesis methods [15][16][17][18] are associated with one or more disadvantages such as using expensive, extremely poisonous and inflammable reagents (B 2 H 6 , B 10 H 14 , BCl 3 , BBr 3 ), complex work-up and purification, and generation of a large amount of toxic waste. The solid phase-synthesis approaches [19,20] have high energy consumption, long operating time, and may not produce boron nanoparticles of acceptable purity and size distribution. Therefore the development of simple, effective, unpolluted, and environmentally friendly approaches for B nanoparticles synthesis is therefore still a subject of intense investigation.…”

“…Karmakar et al [14] recently investigated the effects of particle size on the ignition and combustion behavior for two distinct size groups of boron nanoparticles. It was observed that the ignition delay was reduced for nano-sized particles, and they were completely oxidized in a swirl-type combustor at $1773 K. Therefore, a number of approaches, such as arc decomposition of B 2 H 6 [15], gas phase pyrolysis of B 10 H 14 [16], gas phase reduction of BCl 3 in an inductively coupled plasma [17], solution reduction of BBr 3 with sodium naphthalenide [18], ball milling of coarse boron powder [19], and magnesiothermic reduction of freeze dried boron oxide at elevated temperatures [20] have been developed for the controlled synthesis of boron nanoparticles. The gas-phase and liquid synthesis methods [15][16][17][18] are associated with one or more disadvantages such as using expensive, extremely poisonous and inflammable reagents (B 2 H 6 , B 10 H 14 , BCl 3 , BBr 3 ), complex work-up and purification, and generation of a large amount of toxic waste.…”

Doping-Induced Isotopic Mg11B2 Bulk Superconductor for Fusion Application

“…Apart from the carbon doping method, a new trial related to the state of the boron precursor has been carried out as well. The MgB 2 wires prepared from laboratory made nano-sized boron achieved the J c of 10 5 A·cm −2 at 5 K and 4 T [14]. Bovone et al [15] produced boron powder by magnesiothermic reduction of boron oxide in the lab, which proved to be an excellent precursor for MgB 2 wire manufacture independent of the applied technique.…”