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Preparation of Ultrafine BaTiO3 and SrTiO3 Powders from Na2-xHxTi3O7 Nanowires via Hydrothermal Processing

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Abstract:

BaTiO3 and SrTiO3 ultrafine powders are synthesized from sodium hydrogen titanate nanowires using hydrothermal route. Their preparation and purity depend strongly on the pH value of reaction system (the amount of added alkaline). Under the reaction condition of strong alkaline, the BaTiO3 phase can be obtained, but the SrTiO3 phase can not be easily prepared. Without the addition of any alkaline, the pure SrTiO3 phase can be synthesized. Reaction time also affects on the purity of BaTiO3 phase. Below 15 h of reaction time at reaction temperature 180°C, pure BaTiO3 phase can not be prepared. SEM measurement results show that the average diameter of BaTiO3 powders is about 200 nm and that of SrTiO3 submicrorods is about 300 nm. Their Raman spectra further demonstrate that the prepared products are BaTiO3 and SrTiO3 phases.

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AICAM 2005 View Preview

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Periodical:

Advanced Materials Research (Volumes 11-12)

Pages:

603-606

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.11-12.603

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Online since:

February 2006

Authors:

Tian Hao Ji, Mao Yu Tang, Guan Rao Liu, Xing Yi Qi

Keywords:

Hydrothermal, Titanate, Ultra-Fine

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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