Materials Transactions Online

Materials Transactions, Vol.59 No.04 (2018) pp.690-693
© 2018 The Japan Institute of Metals and Materials

Dependence of Reduction Behavior of Ti in Molten CaCl2 on Various Calcium Titanate

Haruka Okada1, Kakeru Shimokawa1, Taiki Morishige2 and Toshihide Takenaka2

1Graduate School of Science and Engineering, Kansai University, Suita 564-8680, Japan
2Department of Chemistry and Materials Engineering, Kansai University, Suita 564-8680, Japan

The change in TiO2 solubility in molten CaCl2 at 1573 K with CaO addition was studied to clarify the influence of CaO on TiO2 dissolution. The solubility of TiO2 in molten CaCl2 remarkably enlarged with CaO addition, which suggests that a titanate ion (TixOyZ−) was preferentially formed in it. The cathodic behavior in molten CaCl2 containing various species of calcium titanate at 1373-1573 K was investigated by cyclic voltammetry, and electrodeposition of Ti metal was attempted by potentio-static electrolysis. The reduction behavior was affected by the species of calcium titanate, and the components in the deposit changed consequently. These results indicate that the reduction behavior of Ti was strongly influenced by the species of titanate ion, and that the bath consisting of Ca3Ti2O7 is found suitable.

[doi:10.2320/matertrans.MBW201702]

(Received 2017/11/02; Accepted 2018/01/11; Published 2018/03/25)

Keywords: titanium, calcium titanate, calcium chloride, molten salt, solubility, electrolysis

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REFERENCES

  1. Chen G.Z., Fray D.J. and Ferthing T.W.: Nature 407 (2000) 361-364.
  2. Ono K. and Suzuki R.O.: JOM 54 (2002) 59-61.
  3. Suzuki R.O., Noguchi H., Hada H., Natsui S. and Kikuchi T.: Mater. Trans. 58 (2017) 341-349.
  4. Weil K.S., Hovanski Y. and Lavender C.A.: J. Alloys Compd. 473 (2009) L39-L43.
  5. Fray D. and Schwandt C.: Mater. Trans. 58 (2017) 306-312.
  6. Takeda O. and Okabe T.H.: J. Japan Inst. Light Metals 67 (2017) 257-263.
  7. Schwandt C., Doughty G.R. and Fray D.J.: Key Eng. Mater. 436 (2010) 13-25.
  8. Takenaka T., Sugawara M., Matsuo H., Matsuyama A. and Kawakami M.: ECS Trans. 16 (2009) 139-143.
  9. Yamanaka Y., Morishige T. and Takenaka T.: ECS Trans. 64 (2014) 275-283.
  10. Takenaka T., Shimokawa K., Nishikawa K., Okada H. and Morishige T.: Mater. Trans. 58 (2017) 350-354.
  11. Roth R.S., Dennis J.R. and McMurdie H.F.: Phase Diagrams for Ceramists Volume VI, (American Ceramic Society, U.S.A, 1987) pp. 110-111.


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