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Belous, Anatolii
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Publications (7/7 displayed)
- 2022Materials based on barium titanate with colossal dielectric permittivity at high temperatures (Матеріали на основі титанату барію, що проявляють колосальну діелектричну проникність при високих температурах)
- 2021Development and Characterization of Ceramic Inserts Used in Metallic Resonators of EPR Spectrometers to Increase Their Sensitivity ; Розробка та характеризація керамічних вставок в металеві резонатори ЕПР спектрометрів для підвищення їх чутливостіcitations
- 2020Synthesis and properties of ferroelectric semiconductors in the system (Ba1-x-ySryYx)TiO3
- 2014Deposition of nanoscale LiPON films by high-frequency magnetron sputtering
- 2009Structural features of cubic solid solutions of the system ZrO₂—Y₂O₃—Fe₂O₃
- 2009Thermal stabilized ceramic heaters for work-support system of low-capacity automobile diesel engines of power unit
- 2008Influence of iron oxide (III) on degree of Y-ZrO₂ stabilization
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document
Materials based on barium titanate with colossal dielectric permittivity at high temperatures (Матеріали на основі титанату барію, що проявляють колосальну діелектричну проникність при високих температурах)
Abstract
Two types of high-temperature materials based on ferroelectric solid solutions with a high dielectric constant (ε > 1000) in a wide temperature and frequency range were developed. In dielectric materials (1-x)BaTiO<sub>3</sub>–xNa<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> (0.05 ≤ x ≤ 0.3) and (1 x)BaTiO<sub>3</sub>–x K<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> (0.05 ≤ x ≤ 0.3) there is an increase in Curie temperature, a decrease in the dielectric constant and the dielectric loss tangent with increase in x. It is shown that the materials containing potassium and sodium are characterized by a low change in dielectric constant Δε'/ε'<sub>Tc</sub> ≤ ± 15 % in wide temperature ranges. It was found that the widest temperature range where Δε'/ε'<sub>Tc</sub> ≤ ± 15 % in the system (1-x)BaTiO<sub>3</sub>–x Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> (0.1 ≤ x ≤ 0.2) is observed at frequencies 1–10 and 10<sup>5</sup> Hz. While in the (1-x)BaTiO<sub>3</sub>–x K<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> system, the widest temperature interval where Δε'/ε'<sub>Tc</sub> ≤ ± 15 % appears in the frequency range of 10<sup>2</sup>–10<sup>4</sup> Hz (25–300 °C) at x = 0.1 and 10<sup>6</sup> Hz (70–270 °C) at x =0.2. The developed ceramic materials can be promising in the creation of high-temperature capacitors used in the drilling of geological exploration wells, the aerospace industry, and nuclear reactors.