Bi2O3-modified ceramics based on BaTiO3 powder synthesized in water vapor

Kholodkova, A.; Smirnov, A.; Danchevskaya, M.; D, I.Y.; Muravieva, G.; Ponomarev, S.; Fionov, A.; Kolesov, V.

Авторы: Anastasia Kholodkova, Aleksey Smirnov, Marina Danchevskaya, Ivakin Yurii D., Galina Muravieva, Sergey Ponomarev, Alexandr Fionov, Vladimir Kolesov
Журнал: INORGANICS
Том: 8
Номер: 2
Год издания: 2020
Издательство: Molecular Diversity Preservation International (MDPI)
Местоположение издательства: Basel, Switzerland
Первая страница: 1
Последняя страница: 14
DOI: 10.3390/inorganics8020008
Аннотация: Bi2O3 was investigated in the role of a modifier for BaTiO3 powder synthesized in a water vapor atmosphere at 200 °C and 1.55 MPa. Modification was aimed at increasing the sinterability of the powder as well as improving the structural and dielectric properties of the obtained ceramics. The morphology and phase contents of the synthesized BaTiO3 powder were controlled by the methods of SEM and XRD. Properties of pure and Bi-doped BaTiO3 ceramics were comprehensively studied by XRD, SEM, dielectric spectroscopy, and standard approaches for density and mechanical strength determination. Doping with Bi2O3 favored BaTiO3 ceramic densification and strengthening. The room-temperature dielectric constant and the loss tangent of Bi-doped BaTiO3 were shown to stabilize within the frequency range of 20 Hz to 2 MHz compared to non-doped material. The drop of dielectric constant between room temperature and Curie point was significantly reduced after Bi2O3 addition to BaTiO3. Bi2O3 appeared to be an effective modifier for BaTiO3 ceramics produced from non-stoichiometric powder synthesized in water vapor.
Добавил в систему: Холодкова Анастасия Андреевна

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