Open AccessОбразование при отжиге дроплетов в нанопорошке Bi-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=-, полученном импульсным электронным испарением в вакууме
Author(s) -
С.Ю. Соковнин,
В.Г. Ильвес
Publication year - 2021
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2021.16.51322.18776
Subject(s) - materials science , agglomerate , amorphous solid , bismuth , annealing (glass) , nanoparticle , mesoporous material , chemical engineering , extrusion , vacuum evaporation , cathode ray , evaporation , specific surface area , nanotechnology , composite material , electron , crystallography , metallurgy , chemistry , thin film , biochemistry , physics , quantum mechanics , engineering , catalysis , thermodynamics
Using a method of pulsed electron beam evaporation in vacuum was produced the mesoporous multiphase amorphous and crystal nanopowder of Bi2O3 with a specific surface area up to 23 sq.m/g. Influence of thermal annealing of powder (200-300 0C) in air is investigated. The formation of droplets with a size of 2-5 nm was found on the surface of all large nanoparticles that make up the framework 3D nanopowder agglomerates due to extrusion of liquid bismuth from the volume during cooling.