2023-Sustainable Industrial Processing Summit
SIPS2023 Volume 15. Intl. Symp on Advanced Materials and Modelling of Complex Materials
| Editors: | F. Kongoli, F. Marquis, N. Chikhradze, T. Prikhna, O. Adiguzel, E. Aifantis, R. Das, P. Trovalusci |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2023 |
| Pages: | 288 pages |
| ISBN: | 978-1-998384-00-6 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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EFFECT OF GRAPHITE CONTENT IN THE STRUCTURE AND ON ELECTRODYNAMIC PROPERTIES OF ALN-BASED COMPOSITES
Tetiana Serbenyuk1; Tetiana Prikhna2; Fernand Marquis3; Vladimir Sverdun1; Myroslav Karpets4; Semyon Ponomaryov5;1INSTITUTE FOR SUPERHARD MATERIALS OF THE NATIONAL ACADEMY OF SCIENCES OF UKRAINE, Kiev, Ukraine; 2V. BAKUL INSTITUTE NASU, Kiev, Ukraine; 3INTEGRATED MATERIALS TECHNOLOGIES AND SYSTEMS (IMTS), , United States; 4INSTITUTE FOR SUPERHARD MATERIALS, Kiev, Ukraine; 5INSTITUTE OF SEMICONDUCTOR PHYSICS OF THE NATIONAL ACADEMY OF SCIENCES OF UKRAINE (NASU), Kyiv, Ukraine;
Type of Paper: Regular
Id Paper: 415
Topic: 43
Abstract:
The electrodynamic properties of new composite materials based on AlN and made by the free sintering method, with the addition of diamond powders in the amount of 1-5 wt.% were investigated, in the frequency range of 1-10 GHz. As a result of the studies of the structure and phase composition, it was established by X-ray phase analysis that during the sintering process, the graphitization of diamond powder takes place, and after refining the results obtained by the Rietveld method, show that the content of the graphite phase was 0.8, 1.7, and 3.8 wt.% for the materials in which added diamond powder before sintering in amounts of 1, 3, and 5 wt.%, respectively. The study of electrodynamic characteristics showed an increase in the imaginary and real values of the dielectric constant with an increase in the graphite content. Dielectric losses at 10 GHz increase from 0.05 to 0.08 for composites as the amount of graphite phase increases from 0.8 to 3.8 wt. %. It is shown that at frequencies from 1 to 10 GHz, the real part of the dielectric constant for composite materials of each composition practically does not change, while the imaginary part increases slightly. At the same time, an increase in dielectric losses with increasing content of the graphite phase was noted in the entire measured frequency range.