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J. Korean Ceram. Soc. > Volume 58(4); 2021 > Article
Journal of the Korean Ceramic Society 2021;58(4): 483-494.
doi: https://doi.org/10.1007/s43207-021-00125-5
Aspects of development and properties of densely sintered of ultra-high-frequency radio-transparent ceramics of cordierite composition
Aleksandr Zaichuk1, Aleksandra Amelina1, Yuliia Kalishenko1, Yurii Hordieiev1, Dmytro Saltykov2, Nataliia Sribniak3, Victoriya Ivchenko4, Lidiia Savchenko5
1Department of Ceramics, Glass and Building Materials , Ukrainian State University of Chemical Technology , Gagarina Avenue, 8 , Dnipro 49005 , Ukraine
2Department of Applied Radiophysics, Electronics and Nanomaterials , Oles Honchar Dnipro National University , Gagarina Avenue, 72 , Dnipro 49010 , Ukraine
3Department of Building Structures , Sumy National Agrarian University , Gerasima Kondratieva Str., 160 , Sumy 40021 , Ukraine
4Department of Therapy, Pharmacology, Clinical Diagnosis and Chemistry , Sumy National Agrarian University , Sumy , Ukraine
5Department of Architecture and Engineering Surveying , Sumy National Agrarian University , Sumy , Ukraine
Correspondence  Aleksandr Zaichuk ,Email: zaychuk_av@ukr.net
Received: February 18, 2021; Revised: May 8, 2021   Accepted: May 15, 2021.  Published online: July 31, 2021.
ABSTRACT
The paper presents the results of research of cordierite ceramics; within its composition, a part of components is introduced using relatively low-melting MABS glass. After fi ring at a temperature of 1375 °C, densely sintered materials with low values of LCTE (17.7–18.5) × 10–7 deg–1 were obtained, which predetermine their high thermal stability (not lower than 900 °C). The only crystalline phase of experimental ceramics is α-cordierite, which forms its structural matrix. Crystals of α-cordierite of 1–2 μm in size are tightly interconnected via thin layers of the residual glass phase. Cordierite ceramics is characterized by zero values of water absorption and open porosity, as well as high values of mechanical compressive strength. In addition, the dense microstructure allows achieving consistently high dielectric values ( ε = 4.9; tan δ = 0.0014) in an ultra-high-frequency electromagnetic fi eld (1010 Hz). The synthesized ceramics can be successively used as radiotransparent materials, including structural ones.
Key words: Radio-transparent ceramics · Cordierite · Sintering · Crystallization · Microstructure
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