Sibert, M. E., Kolk, A. J., Steinberg, M. A.: Technology of Columbium (Niobium), Papers Presented at the Symposium on Columbium (Niobium) of the Electrothermics and Metallurgy Division, ed. B. W. Gooser et al., (Wiley, 1958) , p. 20.
[3]
岡元敬蔵:日本矿业会志,1963,79,707.
[4]
Jellinek, K., Rudat, A.: Z. Anorg. Allg. Chem., 1926, 155, 73.
[5]
#12
[6]
佐野幸吉、岡(山岛)和久:铁钢,1958,44,859.
[7]
#12
[8]
#12
[9]
Kubaschewski, O., Evans, E. LL.: Metallurgical Thermochemistry, 3rd ed., (Pergamon, 1958) , p. 337.
[10]
Villa, H.: J. Soc. Chem. Ind., 1950, 69, 59.
[11]
#12
[12]
Thompson, M.: The Total and Free Energies of Formation of Oxides of Thlrty-Two Metals, (Electrochemical Society, 1942) , p. 123.
[13]
#12
[14]
#12
[15]
Elliott, J. F., Gleiser, M.: Thermochemistry for Steel-Making, (Addison-Wesley, 1960) , p. 74.
[16]
Smithells, C. J.: Metals Reference Book, (Butterworths, 1955) , vol. 2, p. 590-596.
[17]
King, E. G., Christensen, A. U.: J. Am. Chem. Soc., 1958, 80, 1800.