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Citation: 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, 10(3): 32-34. shu

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

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

Received Date: 1 July 1992
Available Online: 23 November 1992

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.
- BaTiO₃,
- ultrafine powder,
- preparation,
- hydrothermal-treatment,
- H₂O₂-oxidation
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PREPARATION OF HIGH-PURITY ULTRAFINE BaTiO₃ BY H₂O₂ OXIDATION HYDROTHERMAL COMBINED MEIHOD