Terbium Substituted Lanthanum Orthoniobate: Electrical and Structural Properties - Publication - MOST Wiedzy

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Terbium Substituted Lanthanum Orthoniobate: Electrical and Structural Properties

Abstract

The results of electrical conductivity studies, structural measurements and thermogravimetric analysis of La1−xTbxNbO4+δ (x = 0.00, 0.05, 0.1, 0.15, 0.2, 0.3) are presented and discussed. The phase transition temperatures, measured by high-temperature x-ray diffraction, were 480 °C, 500 °C, and 530 °C for La0.9Tb0.1NbO4+δ, La0.8Tb0.2NbO4+δ, and La0.7Tb0.3NbO4+δ, respectively. The impedance spectroscopy results suggest mixed conductivity of oxygen ions and electron holes in dry conditions and protons in wet. The water uptake has been analyzed by the means of thermogravimetry revealing a small mass increase in the order of 0.002% upon hydration, which is similar to the one achieved for undoped lanthanum orthoniobate.

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Details

Category:
Magazine publication
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
Crystals no. 9, edition 2, pages 1 - 14,
ISSN: 2073-4352
Language:
English
Publication year:
2019
Bibliographic description:
Dzierzgowski K., Wachowski S., Gazda M., Mielewczyk-Gryń A.: Terbium Substituted Lanthanum Orthoniobate: Electrical and Structural Properties// Crystals. -Vol. 9, iss. 2 (2019), s.1-14
DOI:
Digital Object Identifier (open in new tab) 10.3390/cryst9020091
Sources of funding:
Verification:
Gdańsk University of Technology

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