Feb 15, 2021 · The crystal structures of the as-synthesized materials were characterized via X-ray diffraction (XRD) as shown in Fig. 1 b. The XRD pattern of CaMnO 3 can be indexed to the orthorhombic perovskite with the space group Pnma, which agrees well with the standard card of CaMnO 3 [37], [39].

Jan 15, 2016 · The XRD patterns showed crystalline phases of CaMnO 3 at 800 °C with the perovskite structure. The SEM and TEM images revealed the surface of the CaMnO 3 nanofibers as rough, with a porous structure.

CaMnO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.32–2.64 Å. Mn4+ is bonded to six O2- atoms to form corner-sharing MnO6 octahedra.

Figure 4 explains XRD patterns of the major peaks of CaMnO 3 which are formed after calcination of CaCO 3 and MnCO 3 at 900°C for 2hr and all data are identical to JCPDS (50-1746) card of...

Mar 1, 2025 · Powder XRD patterns showed the formation of doped-CaMnO 3 phase as the major one in all cases, with an increase of the crystalline cell parameters when the amount of dopant was raised. SEM studies denoted a decreasing trend of …

The CaMnO 3 perovskite type-oxide has been synthesized using a citrate sol-gel method using two different MnO 2 precursors and calcium carbonate.

Hydrogenated uniform Pt clusters supported on porous CaMnO3 nanocomposites are synthesized and investigated as a new electrocatalytic material for oxygen reduction and evolution reactions. Due to...

The perovskite structure of CaMnO3 was characterized by using X-ray Diffraction (XRD), Fourier transform-infrared (FTIR) spectroscopy, Scanning Electron Microscope (SEM) and Thermogravimetric Analysis (TGA). Results indicated that the single phase of CaMnO3 was revealed by XRD analysis.

May 1, 2020 · The perovskite structure of CaMnO 3 was characterized by using X-ray Diffraction (XRD), Fourier transform-infrared (FTIR) spectroscopy, Scanning Electron Microscope (SEM) and Thermogravimetric Analysis (TGA). Results indicated that the single phase of CaMnO 3 was revealed by XRD analysis.

Mar 3, 2023 · The phase was verified from X-ray diffraction (XRD) using an X-ray diffractometer (Bruker D2-Phaser). All the physical properties reported in this work will be on these sintered samples prepared at 1100–1130°C for 3 h. The XRD pattern of all the samples was refined using Rietveld refinement.