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Nanostructured La(Sr)CrO3 Through Gel Combustion: Sintering and Electrical Behavior

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Abstract:

Nanostructured La(Sr)CrO3 (LSC) powders was prepared through glycine-nitrate gel combustion process. It was shown for the first time that the use of relatively inexpensive CrO3 as a starting material for chromium has a potential for the bulk preparation of sinter-active LSC powder. As-prepared powder when calcined at 700 °C resulted in LSC along with a small amount of SrCrO4 as a secondary phase. The powder was found to be composed of soft agglomerates with a particle size of ≈70–270 nm. The average agglomerate size was found to be 0.95 m. The cold pressing and sintering of the LSC powder at 1450 °C resulted in mono-phasic La0.8Sr0.2CrO3 with 94% of its theoretical density. This is the lowest sintering temperature ever reported for La0.8Sr0.2CrO3. The conductivity of the sintered La0.8Sr0.2CrO3 at 1000 °C was found to be ≈18 S cm−1.

Keywords: NANOSTRUCTURED CERAMICS; SOFC INTERCONNECT; SOLUTION COMBUSTION

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2007.630

Publication date: August 1, 2007

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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