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Title: Synthesis of manganite perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3} nanoparticles in w/o-microemulsion

Abstract

In this paper, w/o-microemulsions were employed to produce nanoparticles of the perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3}, which have a size of approximately 20-50 nm. The procedure was carried out using sodium hydroxide or ammonia as co-precipitation agent. The precursor was transformed to perovskite by calcinations at 580 deg. C. Nanosized particles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and N{sub 2} adsorption (BET)

Authors:
 [1];  [2]
+ Show Author Affiliations
  1. Department of Chemistry, TU Berlin, Sekr. TC 8, Strasse des 17. Juni 124, 10623 Berlin (Germany). E-mail: Lopez.Alejandra@chem.tu-berlin.de
  2. Department of Chemistry, TU Berlin, Sekr. TC 8, Strasse des 17. Juni 124, 10623 Berlin (Germany). E-mail: schomaecker@tu-berlin.de
Publication Date:
OSTI Identifier:
20891623
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 41; Journal Issue: 2; Other Information: DOI: 10.1016/j.materresbull.2005.08.015; PII: S0025-5408(05)00317-X; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ADSORPTION; AMMONIA; CALCINATION; CALCIUM OXIDES; CHEMICAL PREPARATION; COPRECIPITATION; MANGANESE OXIDES; MICROEMULSIONS; NANOSTRUCTURES; PEROVSKITE; PRECURSOR; SCANNING ELECTRON MICROSCOPY; SODIUM HYDROXIDES; STRONTIUM OXIDES; X-RAY DIFFRACTION

Citation Formats

Lopez-Trosell, Alejandra, and Schomaecker, Reinhard. Synthesis of manganite perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3} nanoparticles in w/o-microemulsion. United States: N. p., 2006. Web. doi:10.1016/j.materresbull.2005.08.015.
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Lopez-Trosell, Alejandra, & Schomaecker, Reinhard. Synthesis of manganite perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3} nanoparticles in w/o-microemulsion. United States. doi:10.1016/j.materresbull.2005.08.015.
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Lopez-Trosell, Alejandra, and Schomaecker, Reinhard. Thu . "Synthesis of manganite perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3} nanoparticles in w/o-microemulsion". United States. doi:10.1016/j.materresbull.2005.08.015.
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@article{osti_20891623,
title = {Synthesis of manganite perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3} nanoparticles in w/o-microemulsion},
author = {Lopez-Trosell, Alejandra and Schomaecker, Reinhard},
abstractNote = {In this paper, w/o-microemulsions were employed to produce nanoparticles of the perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3}, which have a size of approximately 20-50 nm. The procedure was carried out using sodium hydroxide or ammonia as co-precipitation agent. The precursor was transformed to perovskite by calcinations at 580 deg. C. Nanosized particles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and N{sub 2} adsorption (BET)},
doi = {10.1016/j.materresbull.2005.08.015},
journal = {Materials Research Bulletin},
number = 2,
volume = 41,
place = {United States},
year = {Thu Feb 02 00:00:00 EST 2006},
month = {Thu Feb 02 00:00:00 EST 2006}
}
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Journal Article:
DOI:  10.1016/j.materresbull.2005.08.015
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  • ; - Journal of Solid State Chemistry
    We report the synthesis of the perovskite manganites Pr{sub 0.5}Sr{sub 0.5}MnO{sub 3} and Nd{sub 0.5}Sr{sub 0.5}MnO{sub 3} using mild hydrothermal conditions. Both are formed as polycrystalline powders from solutions of metal salts in aqueous potassium hydroxide at 240 deg. C, and crystallise as a tetragonal polymorph (space group I4/mcm). Scanning electron microscopy shows both materials to contain cuboid-shaped crystallites several microns in dimension, and the average particle size is verified by light scattering measurements. We also report the first hydrothermal synthesis of 2H-BaMnO{sub 3} and 4H-SrMnO{sub 3}, and the first subcritical hydrothermal synthesis of CaMn{sub 2}O{sub 4} (marokite). Despite themore » formation of these alkali-earth manganese oxides at 240 deg. C, we have been unable to isolate rare-earth manganese oxides LnMnO{sub 3} using similar conditions. We discuss the formation of perovskite manganites in hydrothermal reactions by relating our new results to those manganites already reported to form under hydrothermal conditions, and rationalise the trends seen by considering tolerance factor of the perovskite and the variance of the A-site metal radius.« less

  • ; ; ; ... - Physical Review. B, Condensed Matter and Materials Physics
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  • ; ; ; ... - Journal of the Physical Society of Japan
    Structural study of orbital-ordered manganite thin films has been conducted using synchrotron radiation, and a ground state electronic phase diagram is made. The lattice parameters of four manganite thin films, Nd0.5Sr0.5MnO3 (NSMO) or Pr0.5Sr0.5MnO3 (PSMO) on (011) surfaces of SrTiO3 (STO) or [(LaAlO3)0.3(SrAl0.5Ta0.5O3)0.7] (LSAT), were measured as a function of temperature. The result shows, as expected based on previous knowledge of bulk materials, that the films' resistivity is closely related to their structures. Observed superlattice reflections indicate that NSMO thin films have an antiferro-orbital-ordered phase as their low-temperature phase while PSMO film on LSAT has a ferro-orbital-ordered phase, and thatmore » on STO has no orbital-ordered phase. A metallic ground state was observed only in films having a narrow region of A-site ion radius, while larger ions favor ferro-orbital-ordered structure and smaller ions stabilize antiferro-orbital-ordered structure. The key to the orbital-ordering transition in (011) film is found to be the in-plane displacement along [011] direction.« less

  • ; ; ; ... - Physical Review B
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  • ; - Journal of Solid State Chemistry
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