Powder diffraction of the cubic perovskite Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3−δ

Abstract

X-ray powder diffraction data for Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3Ϫ␦ are reported. The powder was prepared using a metal-EDTA complexing method. The XRD data could be fitted with a primitive cubic unit cell in space group Pm3 m ͑No. 221͒. The Rietveld refined unit cell parameter is a c ϭ0.398 30(3) nm with Zϭ1 and D x ϭ5.75 g/cm 3 .

In situ high temperature X-ray diffraction studies of mixed ionic and electronic conducting perovskite-type membranes

“…3 shows the lattice parameters of BSCF, SCF and BCFZ perovskites at various temperatures calculated based on the XRD data under air. Koster and Mertins [25] had reported X-ray powder diffraction data for BSCF. The Rietveld refined unit cell parameter is 3.9830 Å at room temperature which is similar to our value of 3.9793 Å as shown in Fig.…”

THERMAL AND ELECTRICAL PROPERTIES OF Ba0.5Sr0.5CoxFe1-x-yNiyO3-δ (x = 0.4, 0 ≤ y ≤ 0.25) AS CATHODE MATERIAL FOR IT-SOFCs

“…The peaks are indexed on the basis of a cubic perovskite phase with the space group Pm3m (221). 18,19 The lattice constants for the individual compositions were determined by least square programme, using the XRD pattern. It is found from the XRD result that partly substitution of Fe by Ni does not bring any change in the structure which is basically cubic in nature.…”

Crystal Structure and Ionic Conductivity Study of Ni- Doped BSCF Cathode for Low Temperature SOFCS

“…5 To increase the homogeneity of the powder, it is subjected to calcination at 1000 o C for 4 hrs, followed by grinding in an agate mortar for hours. Pellets of BSCFNi, having a diameter of 13 mm and thickness of 2 -3 mm, are prepared by pressing the powder uniaxially at a pressure of 10 kg m -1 sec -2…”

“…Differential Scanning Calorimeter (DSC) measurement, carried out in the temperature range of 300-600 With increase in the Ni concentration, the pattern peak shifts towards high angle direction which corresponds to the lattice shrinkage. The peaks are indexed on the basis of a cubic perovskite phase with the space group Pm3m (221) [5]. It has been reported that the synthesis of the sample through citric route forms undesired secondary phases of Barium and Strontium due to the poor distribution of the alkaline-earth metal (for example, Sr 2+ ) in the solution caused by the relatively weak chelation between Sr 2+ and carboxylate ligands [6][7][8].…”