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Results of receiving a diborid of magnesium are given in work by magniathermal oxidation of boron composite compounds at different argon pressures and temperatures. The relevance of a research is proved by superconducting properties of magnesium diboride. Synthesis of magnesium diboride itself accelerates, due to wall burning and thermal explosion of exothermic mixture of the reaction products of magniathermal. It is shown that the use of SHS method at high argon pressure and temperature allows to obtain magnesium diboride of high purity.

It is shown that the B3+ element is able to incorporate into the facets of oxygen tetrahedra of LiNbO3 crystal structure ( [BO3]3- group) in a trace amounts ( ≈10^(-4) wt. %). In this case, boron noticeably distorts the anion sublattice of the crystal, changing the lengths of the bonds, increasing the ordering of structural units of the cation sublattice. At the same time, boron changes the polarizability of the oxygen-octahedral MeO6 clusters ( Me — Li, Nb ) which determines the ferroelectric and nonlinear optical properties of the crystal.

Synthesis of glasses in Bi2O3/MoO3/GeO2/B2O3 system is offered. A method for estimating the uniformity of such glasses is offered. A procedure for measuring the content of germanium oxide in the glassy samples was developed.