NANOSIZE COBALT(NICKELITE) - CUPRATE-MANGANITES AND THEIR X-RAY STUDIES
Keywords:
cobalt-cuprate-manganite, nickelite-cuprate-manganite, synthesis, nanosized particles, radiographyAbstract
The cobalt-cuprate-manganite LaBaCoCuMnO6 and the nickelito- cuprate-manganite LaBaNiCuMnO6were synthesized by solid-phase interaction in the range 400-1200 ° C from the oxides of lanthanum (III), cobalt (II), nickel (II), copper (II), manganese (III) and barium carbonate. Pre-dewatered at 400 °C, stoichiometric amounts of the starting materials were thoroughly mixed, grinded in an agate mortar. Then they were annealed first in the alundum crucible in the "SNOL" furnace from 800 to 1200 °C. Before each increase in temperature, the mixture was cooled, mixed and thoroughly rubbed. To obtain low-temperature equilibrium phases, a low-temperature annealing was carried out at 400 °C. By grinding the obtained phases on a Retsch vibrating mill (Germany) of the mark "MM301", nanoscale (nanoclusters) particles were obtained whose dimensions were determined on an JSPM-5400 Scanning Probe Microscope "JEOL" Atomic Force Microscope (Japan). The formation of equilibrium compounds of compounds was confirmed by the method of powder X-ray diffraction, carried out on a DRON-2,0 diffractometer. The intensity of the diffraction maxima was estimated from one hundred point scale. The X-ray powder diffraction patterns of the test compounds were determined by an analytical method. On the basis of the indexing, it was established that the obtained nano-sized phases crystallize in a cubic system with the following lattice parameters: LaBaCoCuMnO6 - a = 14.81 ± 0.02 Å; V0 = 3248.57 ± 0.06 Å3; Z = 4; V0el.cell. = 812.14 ± 0.02 Å3; ρX-ray = 4.64 g/cm3; ρpycn. = 4.57 ± 0.01 g/cm3 and LaBaNiCuMnO6 - a = 14.11 ± 0.02 Å; V0 = 2808.29 ± 0.06 Å3; Z = 4; V0el.cell. = 702.07 ± 0.02 Å3; ρX-ray = 4.66 g/cm3; ρpycn.= 4.58 ± 0.01 g/cm3.
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