METHOD OF PRODUCING A NIOBIUM OXIDE MONOCRYSTAL Russian patent published in 2020 - IPC C30B13/04 C30B13/24 C30B13/30 C30B13/34 C30B29/16 

FIELD: technologies of materials.

SUBSTANCE: invention relates to the field of materials technology, which can be used in electronics as contacts for capacitors. Method of producing a niobium oxide monocrystal includes crucibleless melting in an optical system using as a starting material a polycrystalline niobium oxide powder in an argon atmosphere under excessive pressure conditions with simultaneous rotary and vertical movement of the stock with the initial material and in the absence of vertical movement of the rod with seed material, wherein melting is carried out using two biellipsoidal mirrors installed in a vertical configuration, and a xenon lamp with power of 5 kW as a radiation source located in the focal point of the lower mirror, wherein the melt zone is located in the focal point of the upper mirror, with adjustment of the density of the light flux falling on the melt zone, mechanical or automatic movement of curtains from stainless steel, at constant pressure of 3-4 bar and rod movement speed with initial material in vertical direction of 7-9 mm/h, note here that rotary movement of both stock with initial material and rod with seed material is performed, equal to 2-4 rpm and 1-2 rpm respectively, both rods rotating in different directions.

EFFECT: invention enables to obtain monocrystal of niobium monoxide of stoichiometric composition NbO_{1_00}, which has a stable ordered structure, contains only one phase, has minimum defectiveness; material is characterized by stability of properties, preserving its properties at high-temperature effects.

1 cl, 3 dwg