Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1991-09-18
1993-03-09
Tung, T.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
2041531, 204419, 204422, G01N 27411
Patent
active
051924048
ABSTRACT:
A method for the detection and measurement of a minor element in a molten metal, the minor element being selected from the group of phosphorous, silicon, arsenic, antimony and sulfur, includes providing a first electrical lead (5) and immersing it in the molten metal (6), disposing a solid electrolyte matrix (2) in the molten metal in spaced relationship to the first electrical lead, providing a second electrical lead (3) connected to the solid electrolyte matrix (2) so that the matrix is between and separates the leads when the matrix is disposed in the molten metal, and connecting a voltmeter (7) between the other ends of the electrical leads and measuring the EMF between the leads as an indication of the concentration of the minor element in the molten metal. The solid electrolyte is a matrix (2) of alumina selected from the group consisting of .beta.-alumina and .alpha.+.beta. alumina and includes a compound of the element to be detected and measured, oxygen, and an element from the group consisting of alkali and alkaline earth metal elements. The elements are chemically combined with the oxygen and the compound dissociates into its constitute elements under the conditions of measurement in the molten metal. The solid electrolyte matrix may be in the form of a closed end of a tubular member (1).
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Fray Derek J.
Kumar Ramachandran V.
Mineral Industry Research Organisation
Tung T.
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