Characterization of magnesium doped lanthanum orthoniobate synthesized by molten salt route. Issue 6 (July 2015)

• Record Type: Journal Article
• Authors: Mielewczyk-Gryn, A.; Wachowski, S.; Zagórski, K.; Jasiński, P.; Gazda, M.
• Is Part Of: Ceramics international. Volume 41:Issue 6(2015)
• Page Start: 7847
• Page End: 7852
• Publication Date: 2015-07
• Subjects: Proton conductors -- X-ray diffraction -- Electrochemical impedance spectroscopy -- Thermogravimetry; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.02.121
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Molten salt synthesis method has been used to prepare the single phase magnesium doped lanthanum orthoniobate. The phase composition has been checked by X-ray diffraction method and the microstructure studies have been performed by scanning electron microscopy. The high temperature properties of the material have been investigated by thermogravimetry and electrochemical impedance spectroscopy. A dependence between sample total conductivity and temperature has been found supporting the thesis that there is strong correlation between apparent activation energy of conductivity and structural phase transition at ~500 °C. It has been also shown that the conductivity of magnesium doped lanthanum orthoniobate synthesized by the molten salt route reaches values of ~1 mS/cm at 720 °C in wet hydrogen.