The Conductivity and the Crystallization of Perovskite (CaTiO_3) from Ti-bearing Blast Furnace Slag Studied by A. C. Impedance Method

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概要

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• The conductivities of a Ti-bearing blast furnace slag (with 23 % TiO2) and the synthetic slag consisting of CaO-SiO2-Al2O3-TiO2-MgO were measured accurately in the temperature range of 1 653-1 733 K by A. C. impedance method. The relationships between the conductivity and temperature were obtained as: lnκ=14.212-24 820/<I>T</I> for the Ti-bearing blast furnace slag and lnκ=8.557-15 860/<I>T</I> for the synthetic slag(unit of κ: Ω-1·cm-1) in the temperature range of 1 703-1 733 K. Perovskite phase (CaTiO3) could precipitate from these slags during slag cooling process. The temperature at which CaTiO3 started to crystallize was determined as 1 693 K. Rate constants and activation energy for the formation reaction of CaTiO3 were calculated based on the data of conductivity and the first order kinetic equation. Dissociation reactions of Al2O3 and TiO2 could take place due to the crystallization of perovskite phase and the variation of the basicity of the slag. The rate constants and the activation energy for the dissociation reactions were also calculated.

• 社団法人 日本鉄鋼協会の論文
• 1999-11-15

著者

• WANG Shulan

  Graduate School of Electronic Science and Technology

• Wang S

  Notheastern University

• WANG Shulan

  Notheastern University

• LI Guangqiang

  Notheastern University

• LOU Taiping

  Notheastern University

• SUI Zhitong

  Notheastern University

• Sui Z

  Notheastern University

関連論文

• PbSnCaTe Films and PbSnCaTe/PbSnTe Superlattices Prepared by Molecular Beam Epitaxy(Semiconductors)
• The Conductivity and the Crystallization of Perovskite (CaTiO_3) from Ti-bearing Blast Furnace Slag Studied by A. C. Impedance Method
• The Impedance Analysis of Reaction Kinetics at the Interface between Molten Sn-S Alloy and ZnCl_2-NaCl Salt

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