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Innovation and Application of Novel Ferroelectric Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Electronic Materials".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 2553

Special Issue Editors


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Guest Editor
Physics Faculty, Research Institute of Physics, Southern Federal University, 344006 Rostov-on-Don, Russia
Interests: ferroelectricity, piezoceramics, non-toxic active materials, technology, lead-free compositions, pyroelectricity

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Guest Editor
Physics Faculty, Research Institute of Physics, Southern Federal University, 344006 Rostov-on-Don, Russia
Interests: ferroelectric materials

Special Issue Information

Dear Colleagues,

In the technical application of ferroelectrics, several directions have emerged, the most important of which should be considered:

1) manufacturing of small-sized low-frequency capacitors with a large specific capacity;

2) the use of materials with high polarization nonlinearity for dielectric amplifiers, modulators and other controlled devices;

3) the use of ferroelements in computing technology as memory cells;

4) the use of crystals of ferroelectric and antiferroelectrics for modulation and conversion of laser radiation;

5) manufacturing of piezoelectric and pyroelectric transducers.

The main environmental factors affecting the development and commercialization of new materials are the reduction in the use of toxic materials (mainly lead, lead oxide, but also bismuth, cadmium and nickel), conservation of natural resources, environmentally friendly sources and energy conservation. There is an increasing interest in the study of ceramic ferroelectrics at the micro- and submicroscopic level. This is due to the emergence of new technological problems, such as ferroelectric structures for optics, micro- and radio electronics. For this special issue, we sincerely invite you to contribute and share  your research articles, reviews, and communications with our colleagues.

Prof. Dr. Larisa Andreevna Reznichenko
Dr. Eugene Sitalo
Guest Editors

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Keywords

  • ferroelectrics
  • ceramics
  • pyroelectricity
  • piezoelectricity
  • piezoceramics
  • devices

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Published Papers (1 paper)

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Research

15 pages, 17487 KiB  
Article
Features of the Structure and Electrophysical Properties of Solid Solutions of the System (1-x-y) NaNbO3-xKNbO3-yCd0.5NbO3
by Konstantin Andryushin, Lidiya Shilkina, Inna Andryushina, Alexandr Nagaenko, Maxim Moysa, Svetlana Dudkina and Larisa Reznichenko
Materials 2021, 14(14), 4009; https://doi.org/10.3390/ma14144009 - 17 Jul 2021
Cited by 8 | Viewed by 2039
Abstract
Ferroelectric ceramic materials based on the (1-x-y) NaNbO3-xKNbO3-yCd0.5NbO3 system (x = 0.05–0.65, y = 0.025–0.30, Δx = 0.05) were obtained by a two-stage solid-phase synthesis followed by sintering using conventional ceramic technology. It was [...] Read more.
Ferroelectric ceramic materials based on the (1-x-y) NaNbO3-xKNbO3-yCd0.5NbO3 system (x = 0.05–0.65, y = 0.025–0.30, Δx = 0.05) were obtained by a two-stage solid-phase synthesis followed by sintering using conventional ceramic technology. It was found that the region of pure solid solutions extends to x = 0.70 at y = 0.05 and, with increasing y, it narrows down to x ≤ 0.10 at y = 0.25. Going out beyond the specified concentrations leads to the formation of a heterogeneous region. It is shown that the grain landscape of all studied ceramics is formed during recrystallization sintering in the presence of a liquid phase, the source of which is unreacted components (Na2CO3 with Tmelt. = 1126 K, K2CO3 with Tmelt. = 1164 K, KOH with Tmelt. = 677 K) and low-melting eutectics in niobate mixtures (NaNbO3, Tmelt. = 1260 K, KNbO3, Tmelt. = 1118 K). A study of the electrophysical properties at room temperature showed the nonmonotonic behavior of all dependences with extrema near symmetry transitions, which corresponds to the logic of changes in the electrophysical parameters in systems with morphotropic phase boundaries. An analysis of the evolution of dielectric spectra made it possible to distinguish three groups of solid solutions: classical ferroelectrics (y = 0.05–0.10), ferroelectrics with a diffuse phase transition (y = 0.30), and ferroelectrics relaxors (y = 0.15–0.25). A conclusion about the expediency of using the obtained data in the development of materials and devices based on such materials has been made. Full article
(This article belongs to the Special Issue Innovation and Application of Novel Ferroelectric Materials)
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