PREPARATION OF HIGH-PURITY ULTRAFINE BaTiO3 BY H2O2 OXIDATION HYDROTHERMAL COMBINED MEIHOD

Chinese Journal of Applied Chemistry ›› 1993, Vol. 0 ›› Issue (3): 32-34.

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PREPARATION OF HIGH-PURITY ULTRAFINE BaTiO₃ BY H₂O₂ OXIDATION HYDROTHERMAL COMBINED MEIHOD

Oian Yitai¹, Chen Qianwang¹, Chen Zuyao¹, Zhou Guien², Fan Chenggao²

1. Department of Applied Chemistry, University of Science and Technology of China, 230026 Hefei;
2. Structure Besearch Laboratory, University of Science and Technology of China, Chinese Academy of Sciences, Hefei

Received:1992-07-01 Revised:1992-11-23 Published:1993-06-10 Online:1993-06-10

Abstract

Abstract: High-purity ultrafine powder of BaTiO₃ was prepared by H₂O₂ oxidation hydrothermal combined method. H₂O₂ oxidation was performed at room temperature,hydrothermal-treatment at 140℃.When solution of titanium peroxide was mixed with excess of barium hydroxide solution and hydrothermally treated for 6h, single phase powder of BaTiO₃ was obtained with average particle size 55nm and a narrow particle size distribution. From TiO₄^2- solution TiO₂·xH₂O, anatase and rutile also could be obtained, but the crystals of TiO₂ were less effective for BaTiO₃ preparation. Anatase powder formed BaTiO₃ by hydrothermal-treatment at 140℃ for 6h gave BaTiO₃ of 0. 12μm size in average.

Key words: BaTiO₃, ultrafine powder, preparation, hydrothermal-treatment, H₂O₂-oxidation

Oian Yitai, Chen Qianwang, Chen Zuyao, Zhou Guien, Fan Chenggao. PREPARATION OF HIGH-PURITY ULTRAFINE BaTiO₃ BY H₂O₂ OXIDATION HYDROTHERMAL COMBINED MEIHOD[J]. Chinese Journal of Applied Chemistry, 1993, 0(3): 32-34.

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PREPARATION OF HIGH-PURITY ULTRAFINE BaTiO₃ BY H₂O₂ OXIDATION HYDROTHERMAL COMBINED MEIHOD

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