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DC Field | Value | Language |
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dc.contributor.author | Behera, S K | - |
dc.contributor.author | Sahu, P K | - |
dc.contributor.author | Pratihar, S K | - |
dc.contributor.author | Bhattacharyya, S | - |
dc.date.accessioned | 2008-08-13T04:01:22Z | - |
dc.date.available | 2008-08-13T04:01:22Z | - |
dc.date.issued | 2008 | - |
dc.identifier.citation | Journal of Physics and Chemistry of Solids, Vol 69, Iss 8,P 2041-2046 | en |
dc.identifier.uri | http://dx.doi.org/10.1016/j.jpcs.2008.02.019 | - |
dc.identifier.uri | http://hdl.handle.net/2080/719 | - |
dc.description | Copyright for the paper belongs to Elsevier | en |
dc.description.abstract | Lanthanum aluminate ceramic powders could be prepared by a combined gel precipitation process from metal chlorides using ammonia. A slight modification in the conventional gel precipitation technique was carried out by introducing a step of ultrasonication followed by centrifugal washing of the gel. The dried gels produced pure phase lanthanum aluminate powders on calcination at 1100 °C for the combined gel-precipitated powders, and at 600 °C for the washed gel. The phase evolution was studied and it was found that the delay in obtaining monophasic LaAlO3 in the combined gel-precipitated powder owed to the crystallization of an impure phase LaOCl. This phase was not detected in the washed gel (WG) powders. TEM micrographs showed a uniform morphology for the calcined WG powders, which were in contrast to the irregular particles in the gel-precipitated (GP) powders. The uniform morphology was assigned to the ultrasonic effects during washing of the gel. | en |
dc.format.extent | 782678 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | Elsevier | en |
dc.subject | Oxides | en |
dc.subject | Chemical synthesis; | en |
dc.subject | Infrared spectroscopy | en |
dc.subject | Thermogravimetric analysis (TGA); | en |
dc.subject | X-ray diffraction | en |
dc.title | Phase evolution in gel-precipitated LaAlO3 ceramics | en |
dc.type | Article | en |
Appears in Collections: | Journal Articles |
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sbhatt.pdf | 764.33 kB | Adobe PDF | View/Open |
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