The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We have prepared polycrystalline samples of the Ruddlesden-Popper La2-2xCa1+2xMn2O7 phase and determined their crystal structure and thermoelectric properties above room temperature. Single-phase samples with tetragonal I4/mmm space group are obtained for the samples with 0.50 les x les 1.00; the corresponding valence state of Mn is from 3.5 to 4.0. With increasing x, the a-axis length gradually decreases...
Systematic ion substitution has been performed on the Co site in the rock-salt (RS)-type [Ca2CoO3] subsystem of misfit-layered cobalt oxide [Ca2(Co1-xAx)O3-delta] 0.62CoO2 (A = Nb, Ru, Ta, Pb, W, La and Zr). The oxygen deficiency delta and the decomposition temperature Td of the substituted samples have been determined by means of the thermogravimetric analysis (TGA). Upon heating, the oxygen atoms...
The crystal structures of thermoelectric (TE) compounds Bi1.91Sr2.0Rh1.77Ox and Bi 2.12Ba2.00Rh1.95Ox are investigated by means of electron diffraction measurements and high-resolution electron microscopy. These compounds have layered structures and consist of two interpenetrating subsystems exhibiting incommensurated periodicities along b-axis. Both subsystems, CdI2 -type RhO2 sheets and a distorted...
Large and high-quality single crystal flakes of [Ca2CoO 3]0.62[CoO2] compound were grown from Co3O4 and CaCO3 reagents with chloride flux. Typical single crystal flake size is about 5times5times0.02 mm 3. Obtained crystal flakes were consolidated by the spark plasma sintering (SPS) technique at 1100 K for 1 h. Grain alignment was checked by XRD and also was confirmed by SEM observations on the fractured...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.