ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
LaMnO3-based perovskite oxides are typical functional materials applicable to various devicesfor its chemistry and physics properties. The conventional method solid-state reaction method has somedrawbacks of high reaction temperature, large particle size and limited degree of chemical homogeneity.So, an easy, low cost and environmental method of synthesizing fine and homogenous powders ofLaMnO3 is required. This paper discusses the synthesis of LaMnO3 via a mechanochemical activatedprocess. The mixtures of La2O3 and Mn2O3 were used as starting powders. The specific surface of startingmaterials was measured by BET method. A planetary ball mill was used to grind the starting mixtures.During the grinding process, XRD analysis was employed to make clear the phase changes, and BETanalysis was used to test the specific surface changes. After being grinded for different time, the mixtureswere annealed at different temperatures. After this, the phase identification of mixtures was conducted byXRD. At the same time, a pre-mixing of starting materials with ethanol as solvent by normal ball-millingfor 8 hrs was proceeded to obtain homogeneous mixture and improve the efficiency of grinding. Allobtained LaMnO3 powders via the mechanochemical activated process were characterized by SEMimaging. Finally, an optimized powder processing was proposed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2024.pdf
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