International Conference on Physics.SPb/2025

Theoretical and experimental study of fine erbium oxide powder treatment in RF plasma jet to obtain light-emitting microspheres

V. A. Sergeev^a, A. V. Medvedev^b, D. V. Ivanov^a, S. G. Zverev^a, S. Yu. Grachev^a, A. A. Mashigin<sup>a

a</sup> Peter the Great St. Petersburg Polytechnic University
^b Ioffe Institute, St. Petersburg

Abstract: Mathematical modeling of processes in a RF inductively coupled plasma torch is described. The obtained temperature and plasma velocity distributions were used as initial data for calculating the motion of erbium oxide powder in a plasma jet. As a result, the technological process parameters were obtained that ensure effective processing. The obtained operating parameters were used for experimental studies. The obtained erbium oxide microspheres turned out to be an order of magnitude larger than the initial powder. The article presents hypotheses explaining this result. Optical studies of the obtained microspheres showed intense photoluminescence in the visible and near infrared spectral range.

Keywords: erbium oxide, light-emitting microspheres, plasma treatment, RF inductively coupled plasma torch.

Received: 05.05.2025
Revised: 27.06.2025
Accepted: 07.07.2025

DOI: 10.61011/PJTF.2025.23.61671.8053

Bibliographic databases:

•