Synthesis, microstructure and electrical properties of nanocrystalline calcium doped lanthanum orthoniobate - Publikacja - MOST Wiedzy

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Synthesis, microstructure and electrical properties of nanocrystalline calcium doped lanthanum orthoniobate

Abstrakt

The single phase lanthanum orthoniobate with tetragonal structure has been synthesized by the means of mechanosynthesis method. The studies have shown the crystal structure of La0.98Ca0.02NbO4 depends on the synthesis stage. The samples were predominantly in the tetragonal phase with a trace amount of the monoclinic phase. The SEM studies of morphology and microstructure have shown nanocrystallinity of the materials. The Raman studies showed the significant difference between the Raman spectra of nano- and microcrystalline La0.98Ca0.02NbO4. A decrease of Debye temperature, shown a change of thermal properties due to the presence of nano-sized particles in La0.98Ca0.02NbO4. Electrical characterization results suggest the protons are predominant charge carries in the material for the whole measured range of temperature and shows the total conductivity value of 4.0 × 10−5 S cm−1 at 600 °C in wet air. The calculated activation energies were equal to (0.81 ± 0.04) eV under dry and (0.73 ± 0.06) eV under humidified conditions. That indicates that nanostructuring was successfully stabilized the high-temperature tetragonal phase.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
JOURNAL OF SOLID STATE CHEMISTRY nr 270, strony 601 - 607,
ISSN: 0022-4596
Język:
angielski
Rok wydania:
2019
Opis bibliograficzny:
Miruszewski T., Winiarz P., Dzierzgowski K., Wiciak K., Zagórski K., Morawski A., Mielewczyk-Gryń A., Wachowski S., Strychalska-Nowak J., Sawczak M., Gazda M.: Synthesis, microstructure and electrical properties of nanocrystalline calcium doped lanthanum orthoniobate// JOURNAL OF SOLID STATE CHEMISTRY. -Vol. 270, (2019), s.601-607
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.jssc.2018.12.034
Źródła finansowania:

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