A. I. Tsvetkov, D. A. Mansfeld, A. V. Vodopyanov, A. S. Sedov, “Experimental evaluation of the temperature dependence of the absorption of metal oxide powders heated by a 527-GHz gyrotron radiation”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 2021, Volume 47, Issue 16,Pages <nobr>36

Experimental evaluation of the temperature dependence of the absorption of metal oxide powders heated by a 527-GHz gyrotron radiation

A. I. Tsvetkov^ab, D. A. Mansfeld^a, A. V. Vodopyanov^a, A. S. Sedov^a

^a Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod
^b Volga State University of Water Transport, Nizhnii Novgorod

Abstract: In this paper, the temperature dependence of the absorption index of Al$_2$O$_3$, ZnO, and TiO$_2$ powders at a frequency of 527 GHz was studied. A continuous-wave gyrotron with an output power up to 240 W was used as a microwave power source for heating the samples. The power absorbed by the samples was measured in the temperature range from 300 to 1000$^\circ$C. A significant increase (by four to six times) in the absorption index was observed as compared with the experiments at a frequency of 263 GHz.

Keywords: metal oxide powders, absorption, gyrotron.

Received: 05.04.2021
Revised: 07.05.2021
Accepted: 11.05.2021

DOI: 10.21883/PJTF.2021.16.51327.18808