Glass-ceramic ferroelectric composite material BaTiO3/KFeSi for microwave applications
- Glass-ceramic composites consisting of potassium-iron-silicate glass and barium titanate mixed in various proportions were successfully synthesized by low-temperature sintering. The crystal structure of the obtained composite samples, the porosity and the microhardness were studied by the X-ray diffraction, the electron microscopy, the weight method, and the Vickers method. Electrical characteristics (dielectric permittivity, tunability and losses) of as-prepared and annealed in oxygen mediumGlass-ceramic composites consisting of potassium-iron-silicate glass and barium titanate mixed in various proportions were successfully synthesized by low-temperature sintering. The crystal structure of the obtained composite samples, the porosity and the microhardness were studied by the X-ray diffraction, the electron microscopy, the weight method, and the Vickers method. Electrical characteristics (dielectric permittivity, tunability and losses) of as-prepared and annealed in oxygen medium samples were investigated at microwaves. According to structural analysis, the synthesized samples are a mixture of KFeSi glass, ferroelectric BaTiO3, and dielectric barium polytitanates; the ratio of the latter determines the electrical properties of the composites. Depending on the content of barium titanate, the studied composite samples show a permittivity from 50 to 270 with a dielectric loss level of 0,1–0,02 in frequency range from 3 to 10 GHz. Annealing of composite samples in an oxygen-containing environment leads to an increase in their dielectric permittivity and tunability by 10–25% and a twofold decrease in dielectric loss.…
Author: | Andrey Tumarkin, Natalya Tyurnina, Nikolay Mukhin, Zoya Tyurnina, Olga Sinelshchikova, Alexander Gagarin, Eugeny Sapego, Yriy Kretser |
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URL: | https://linkinghub.elsevier.com/retrieve/pii/S0263822321014161 |
ISSN: | 0263-8223 |
Parent Title (English): | Composite Structures |
Publisher: | Elsevier |
Document Type: | Article |
Language: | English |
Year of Publishing: | 2022 |
Date of Publication (online): | 2023/10/11 |
Publishing Institution: | Technische Hochschule Brandenburg |
Release Date: | 2023/10/11 |
Volume: | 281 |
Article Number: | 114992 |
First Page: | 1 |
Last Page: | 10 |
Institutes: | Fachbereich Technik |
open_access (DINI-Set): | open_access |
University Bibliography: | Hochschulbibliografie |
Licence (German): | Creative Commons - CC BY - Namensnennung 4.0 |