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Information × Registration Number 0225U000988, (0122U000400) , R & D reports Title Development of new composite materials with ceramic and polymer matrices with a high level of absorption of electromagnetic radiation in a wide range of frequencies for the needs of electronic instrumentation, the Internet, mobile communications, etc. popup.stage_title Розробка нових композиційних матеріалів з керамічною та полімерною матрицями з високим рівнем поглинання електромагнітного випромінювання в широкому діапазоні частот для потреб електронного приладобудування, мережі інтернету, мобільного зв’язку та ін. Head Borymskyi Oleksandr I., к.т.н.Prikhna Tetiana O., Доктор технічних наук Registration Date 22-01-2025 Organization V. Bakul Institute of superhard material of the National Academy of Sciences of Ukraine popup.description1 Creation of new dense light composite materials with ceramic matrix and polymer with a given set of functional properties by free sintering, hot pressing, sintering at high pressures (2-5 GPa) and temperatures or hardening at room or elevated temperatures. popup.description2  The influence of the type and concentration of absorbing additives on the properties of composite ceramic and polymer materials was studied. For the first time, new dense composite ceramic materials based on AlN with various fillers were synthesized under high pressure conditions (2-3 GPa) and by hot pressing (15 MPa). The relative dielectric constant for composites made by hot pressing is within 10.5 - 33.03, dielectric losses are within 0.009-0.214 (in the frequency range 12.4-18 GHz), thermal conductivity is 30-40 W/(m·K), hardness is 7.6 - 10.04 GPa, crack resistance is 4.28 - 6.20 MPa·m1/2. The highest and constant dielectric characteristics in this frequency range are demonstrated by the composites AlN–5%DP–5%TiN, AlN–5% DP –5%ZrB2, AlN–5%Soot. In the higher frequency range of 26-36 GHz, the best complex of electrophysical and mechanical properties is exhibited by the composite AlN–5% DP –5%Mo. Fe-O nanopowders with an average grain size of 7-50 nm, obtained by the method of electroerosion dispersion of metal filings in water, were used to develop gradient absorber materials on a polymer basis. The developed materials were characterized by: - absorption of 99% (with maximum penetration of - 40 dB and reflection of -23 dB) at the frequency of the incident magnetic wave of 36.6 GHz; - absorption of 90% (with maximum penetration - 40 dB and reflection -18 dB) at the frequency of the incident magnetic wave of 10 GHz; - absorption of 98.4% (with maximum reflection and -10 dB and penetration - and -60 dB) at the frequency of the incident magnetic wave of 36.6 GHz. Also, the developed materials - absorbers withstood 320,000 load cycles with a deviation of 4 mm before delamination, but even after that their reflectivity practically did not change and was 1.5%. Product Description popup.authors Androshchuk Oleksandr O. Bilorusets Viktor V. Barvitskyi Pavlo P. Borymskyi Ivan O. Verzun Maiia V. Huzii Serhii H. Devin Leonid M. Kislikov Oleksandr S. Karpets Myroslav V. Kasatkin Oleksandr L. Kachurovska Mariia H. Kushch Vadym V. Levchenko Valerii I. Lokatkina Anastasiia V. Marchenko Anatolii A. Matsenko Oleksandra V. Monastyrov Mykola К. Moshchil Viktor Ye. Polikarpova Liliia O. Ponomarov Semen S. Prysiazhna Olena V. Rozhko Kateryna I. Sadovskyi Yaroslav V Sverdun Volodymyr B. Sverdun Nina V. Serbeniuk Tetiana B. Serhiienko Nina V. Sorochenko Tetiana A. Staryk Serhii P. Tielieshov Andrii I. Shaternik Anton V. popup.nrat_date 2025-01-22 Close