Properties of sol–gel prepared BaCeO3 solid electrolyte using acetate precursors

Abstract

A sol-gel route was used to prepare Yb-doped BaCeO 3 at the relatively low temperature of 1,100°C. At this calcination temperature, the carbonate residues were completely decomposed and the high crystallinity of Ybdoped BaCeO 3 powders with orthorhombic structure was obtained. The loose particles in nanosized range was observed from scanning electron micrographs but agglomerates with size ranging from 200 to 500 nm seem to dominate the bulk powder. Density of the pellet sintered at 1,400°C for 24 h was about 95% of the theoretical density. Morphology of the fractured pellet revealed that the diameter of grains was between 1 and 3 μm. AC electrical conductivity of the sample in wet air was carried out using impedance spectroscopy in the range of 1 Hz to 10 MHz. At 300°C, it was found that at high frequencies the imaginary values of the impedance were positive. The effect was attributed to the presence of an inductive element in the experimental setup.

Characterization of cerate–zirconate ceramic powder prepared by a high-pressure–high-temperature batch-wise reactor system

“…and CO 3 2-during the calcination process. Therefore, further modification technique using a supercritical fluid that assisted with sol-gel method to produce a single BCZY phase will be applied in our future work.…”

“…Protonic conductors of ceramic perovskite-type oxides (ABO 3 ) have captured attention of researchers worldwide for technological purpose in fuel cells, batteries, steam electrolyser, etc. The best candidate amongst them is the perovskite-type oxides of Ba(Ce,Zr)O 3 which is known to exhibit high mechanical and chemical stability along with good conductivity.…”

“…To overcome the SSR shortcomings, wet chemical methods (WCMs) such as sol-gel, hydrothermal, co-precipitation, etc. [3][4][5], are adopted to obtain the desired perovskite compound. WCMs offer fine powder morphologies with less contamination.…”

Morphology and Elemental Composition of Cerate-Zirconate Compound as-Prepared by a Sol-Gel Technique

“…Extensive studies on soft chemistry methods that have the ability to reduce calcination temperature had gain much more interest from researchers world-wide. These chemistry methods have been developed to synthesize submicron-sized to nano-sized oxide powder with excellent properties [4,5]. The use of relatively low calcination temperature also inhibits the loss of some easily evaporated elements such as Ba.…”

Synthesis and characterization of a nano-scaled barium cerate perovskite powder using starch as polymerization agent

“…Compacts on the basis of BaCeO 3 generally reveal only a moderate densification behaviour [4,25]. For application such as capacitors or in SOFCs the density of the ceramics must be high [26,27,28,29,30,31]. On the other hand, sintering temperatures above 1500 °C should be avoided because BaCeO 3 melts incongruently at 1480 °C ± 5 °C with the formation of CeO 2 and a liquid containing BaO [5,32].…”