Open AccessОсобенности импульсного нагрева излучением субтерагерцевого гиротрона при получении нанопорошков оксидов металлов
Author(s) -
А.В. Водопьянов,
Д.А. Мансфельд,
А.И. Цветков,
А.А. Орловский
Publication year - 2020
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2020.15.49746.18331
Subject(s) - evaporation , duty cycle , materials science , radiation , thermal conductivity , condensation , nuclear engineering , oxide , thermal radiation , analytical chemistry (journal) , optics , power (physics) , thermodynamics , composite material , chemistry , metallurgy , physics , chromatography , engineering
The paper describes the features of the metal oxide nanopowder obtaining by an evaporation-condensation method with pulsed heating of the material by focused subterahertz radiation. It has been experimentally shown that optimal conditions for the rapid evaporation of a substance are achieved at the highest possible pulse power and the lowest possible duty cycle at a fixed average power. Under these conditions, it is possible to realize the heating and evaporation of a substance in a focused radiation beam in a relatively short time, while the adjacent layers of the substance maintain a relatively low thermal conductivity. A linear increase in the evaporation rate with a decrease in the duty cycle of heating pulses was demonstrated, the increase reached 5 times relative to the continuous heating mode.