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2000•Journal of Natural Science of Heilongjiang UniversityRequires access

Study on preparing perovskite-type complex oxides La_(1-x)Sr_xFeO_3 nanocrystal

Chi Yu-jua

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Abstract

La_(1-x)Sr_xFeO_3(x=0, 0.25, 0.5, 0.75, 0.9, 1.0)perovskite complex oxides nanocrystal were prepared from the Sol-Gel method. The temperature of firing bulk-gel was determined by TGA. The XRD method was usde to carry out the characterization of fired powders and determine the grain size. The results showed that the prepared catalysts were per ovskite structure when the Sol-Gel were prepared at 70-80℃ and pH=8 and the average grain she was less than 20nm. The effect about the amount of at forming Sol-Gel has been discussed.

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What this paper is about

La_(1-x)Sr_xFeO_3(x=0, 0.25, 0.5, 0.75, 0.9, 1.0)perovskite complex oxides nanocrystal were prepared from the Sol-Gel method. The temperature of firing bulk-gel was determined by TGA. The XRD method was usde to carry out the characterization of fired powders and determine the grain size. The results showed that the prepared catalysts were per ovskite structure when the Sol-Gel were prepared at 70-80℃ and pH=8 and the average grain she was less than 20nm. The effect about the amount of at forming Sol-Gel has been discussed.

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Available abstract

La_(1-x)Sr_xFeO_3(x=0, 0.25, 0.5, 0.75, 0.9, 1.0)perovskite complex oxides nanocrystal were prepared from the Sol-Gel method. The temperature of firing bulk-gel was determined by TGA. The XRD method was usde to carry out the characterization of fired powders and determine the grain size. The results showed that the prepared catalysts were per ovskite structure when the Sol-Gel were prepared at 70-80℃ and pH=8 and the average grain she was less than 20nm. The effect about the amount of at forming Sol-Gel has been discussed.

Key concepts: Nanocrystal, Sol-gel, Grain size, Perovskite (structure), Materials science, Chemical engineering, Catalysis, Nanotechnology

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