Electrical charge of metal oxides in liquid metals
- 37 Downloads
An attempt was made to determine the electrical charging characteristics of metal oxide particles suspended in a liquid metal. A liquid metal and metal oxide particles in the liquid were respectively chosen as a cathode and anode for the potential measurements. By taking a close symmetry of electrical circuit, the potential difference between electrodes could be measured successfully. Experimental results show that alumina carries a positive charge by providing electrons to the liquid metal phase such as molten lead and molten aluminum. The potential difference was in the range of 0.01 and 0.08 mV, and was increased with increasing temperature and the amount of oxide added to the liquid metal. Most metal oxides in liquid metal carry a positive charge owing to the formation of the space-diffused charge layer.
Key wordsoxide inclusions kw]surface charge electrostatic charge contact potential lattice defects metal refining
Unable to display preview. Download preview PDF.
- 1.I. Iwasaki, S. R. B. Cooke and H. S. Choi,AIME Trans. 217, 237 (1960).Google Scholar
- 2.D. W. Fuerstenau,Froth Flotation 50th Anniversary Volume, p. 98, AIME Inc., New York (1962).Google Scholar
- 3.H. S. Choi, Y. S. Kim and Y. H. Paik,Can. Min. & Met. Bull., Feb., 1 (1967).Google Scholar
- 4.K. Hauffe,Oxidation of Metals, p. 8, Plenum Press, NY (1965).Google Scholar
- 5.O. Kubaschewski and B. E. Hopkins,Oxidation of Metals and Alloys, p. 71, Butterworths, London (1967).Google Scholar
- 6.A. J. Dekker,Solid State Physics, p. 230, Prentice-Hall Inc. (1969).Google Scholar
- 9.B. Erdman,Application Note #200, Keithley Instrument Inc., Cleveland, Ohio (1983).Google Scholar
- 10.K. Hauffe and A. L. Sierk,Z. Phys. Chem. 196, 160 (1950).Google Scholar