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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.show moreshow less

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Metadaten
Author:Andrey Tumarkin, Natalya Tyurnina, Nikolay Mukhin, Zoya Tyurnina, Olga Sinelshchikova, Alexander Gagarin, Eugeny Sapego, Yriy Kretser
URL:https://linkinghub.elsevier.com/retrieve/pii/S0263822321014161
ISSN:0263-8223
Parent Title (English):Composite Structures
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
Page Number:10
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
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