Synthesis and properties of barium modified yttrium borate. (March 2017)

• Record Type: Journal Article
• Authors: Maczka, M.; Pasierb, P.
• Is Part Of: Materials research bulletin. Volume 87(2017)
• Page Start: 84
• Page End: 91
• Publication Date: 2017-03
• Subjects: A. Inorganic compounds -- B. Microstructure -- C. Impedance spectroscopy -- D. Electrical properties -- D. Ionic conductivity; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2016.11.006
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: The influence of Ba dopant on YBO3 on phase composition, structure, microstructure, electrical properties was determined. The possibility of protonic conductivity in Ba doped YBO3 materials was postulated. The influence of Ba dopant on electrical properties of YBO3 discussed in terms of phase composition and microstructure. Abstract: Samples of Y1-x Bax BO3 with nominal compositions 0 ≤ × ≤ 0.3 have been prepared using coprecipitation method. Phase composition, crystal structure, microstructure and electrical properties were investigated using X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Electrochemical Impedance Spectroscopy (EIS). Additionally, Differential Thermal Analysis and Thermogravimetry coupled with Mass Spectrometry (DTA–TG–MS) allowed to propose the mechanism of chemical reactions during synthesis process. Phase composition of the obtained materials depends on the amount of barium dopant and the preparation conditions. The dependence of lattice parameters on Ba content was also found, indicating the incorporation of Ba into the YBO3 lattice. SEM results showed grain growth and formation of microcracks due to Ba doping. The determined electrical properties as a function of temperature and gas atmosphere indicated the possibility of protonic conductivity in the YBO3 – based materials. The influence of Ba on electrical properties has been interpreted basing on the results of XRD and SEM methods.