Electrical properties of Ba2(In1 − x Al x )2O5 solid solutions

Abstract

Abstract-The electric conductivity of perovskite like Ba 2 (In 1 -x Al x ) 2 O 5 solid solutions (0 < x ≤ 0.20) characterized by structural disordering in the oxygen sublattice was studied as a function of temperature and partial pressure of oxygen in an atmosphere with a low content of water vapors = 3 × 10 -5 atm). When In 3+ was partially replaced by Al 3+ , the oxygen ion conductivity increased because of the disordering of oxygen structural vacancies, leading to a significant increase in the total electric conductivity of the samples.

Formation of dense electrolytes based on BaCeO3 and BaZrO3 for application in solid oxide fuel cells: The role of solid-state reactive sintering

“…Since the dis covery of proton conduction in materials with perovskite structure (Iwahara et al, 1980s [3,4]), it is also revealed at present in oxide systems with structure of brownmillerite [5,6], scheelite [7,8], pyrochlore [9], and even fluorite [10]. This unique feature opens the possibility of applying such materials as electrolytes for intermediate and high temperature electrochemical devices, including solid oxide fuel cells (SOFC) [11], sensors [12], electrolyzers [13], membrane reactors for high purity hydrogen production [14], ammonia synthesis [15], natural fuel desulfidization [16], and hydrogenation/dehydrogenation of simple hydrocarbons [17].…”

High electrical conductivity in Ba2In2O5brownmillerite based materials induced by design of a Frenkel defect structure

“…Lattice volumes estimated by Rietveld analysis data. Cite this: RSC Adv., 2017, 7, 4688 and T t was examined using Ba 2 (In,M) 2 O 5 (M ¼ Ga, [13][14][15][16] Al, 14,17 Sc, 18,19 Y, 18,19 Yb, 18 Dy, 18 Sm 18 ) system, Ba 2 (In,(Sc,Lu)) 2 O 5 system, 20 Ba 2 (In,M) 2 O 5+d (M ¼ Zr, 21,22 Ce, 23,24 Ti, 25 Sn, 26 Si, 27 V, 28 Mo, 28 W, 29 34 (La, Ce), 35 (La, Zr), 35 (La, Mg) 35 ] system and uorine doped Ba 2 In 2 O 5+x system. 36 The representative examples of aforementioned temperature dependence of conducting properties were summarized in Fig.…”