DOI: 10.1016/J.JALLCOM.2009.08.012 Corpus ID: 95720565; Thermoelectric properties of Bi, Nb co-substituted CaMnO3 at high temperature @article{Park2009ThermoelectricPO, title={Thermoelectric properties of Bi, Nb co-substituted CaMnO3 at high temperature}, author={Jong-Woon Park and D. H. Kwak …
Electron-doped perovskite Ca 1−x Bi x MnO 3 ( x = 0, 0.02, 0.03, 0.04, 0.06 and 0.10) was prepared by a conventional solid-state reaction method. Their …
The material CaMnO3 is a fascinating example of the rich properties of perovskite materials and continues to attract the attention of researchers in materials science and condensed …
... Much effort has been made to study various doping strategies aimed at increasing the electrical conductivity and thermoelectric efficiency of CaMnO 3 . The …
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Electron and phonon transports in CaMnO3 and its Bi-doped counterpart, Bi0.03Ca0.97MnO3, are investigated by thermoelectric transport measurements, Raman spectroscopy, and first-principles calculations. In particular, we focus on CaMnO3 and Bi0.03Ca0.97MnO3's electronic structures, temperature-dependent electron and phonon …
A two-step synthesis approach was utilized to grow CaMnO3 on M-, R- and C-plane sapphire substrates. Radio-frequency reactive magnetron sputtering was used to grow rock-salt-structured (Ca, Mn)O followed by a 3-h annealing step at 800 °C in oxygen flow to form the distorted perovskite phase CaMnO3. The effect of temperature in the …
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The lattice parameters and cell volume were increased with increasing Bi contents and increased density of all samples. The SEM image shows good compactness and connecting grain. Then Ï of all doped samples were decreased with decreasing Bi contents and showed metallic behavior. The κ has been lowest at x = 0.03 of 3.6 W m-1 …
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Бөмбөлөгт тээрэмLattice parameters and orthorhombic distortion of CaMnO3 … The crystal structure refinement yields accurate absolute values of lattice parameters, a =5.281 59 (4) Å, b =7.457 30 (4) Å, and c =5.267 48 (4) Å, leading to orthorhombic distortion of ( c/a, √2 c/b )= (0.997 33,0.998 95).
Fig.␣1 shows the powder X-ray diffraction spectra of the Bi doped Ca 1− x Bi x MnO 3 for the composition studied (x = 0, 0.02, 0.03, 0.04, 0.06 and 0.10). In each case all diffraction peaks could be assigned to the CaMnO 3 phase with the Pnma space group (JCPD 01-073-6702) thus indicating that the powders were a single phase. The …
Stephen Charles Parker. University of Bath. Feridoon Azough. Show all 5 authors. Abstract. First principle calculations were employed to investigate the …
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CaMnO3. Lithium ion batteries. Anode. Different temperature. 1. Introduction. Lithium ion batteries (LIBs) have received significant attention for energy …
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The electron and phonon transports in CaMnO 3 and in one of its Bi-doped counterparts, namely, Bi 0.03 Ca 0.97 MnO 3, are investigated using the thermoelectric transport measurements and first-principles calculations.We find that antiferromagnetic insulator CaMnO 3 breaks the Wiedemann–Franz law with the Lorenz number reaching …
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Electron-doped perovskite Ca 1−x Bi x MnO 3 ( x = 0, 0.02, 0.03, 0.04, 0.06 and 0.10) was prepared by a conventional solid-state reaction method. Their homogeneity was confirmed using X-ray diffraction and their thermoelectric properties were measured up to 973 K. The results indicate that both the electrical resistivity and the absolute ...