The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 09, 1993
Filed:
Sep. 18, 1991
Derek J Fray, Cambridge, GB;
Ramachandran V Kumar, Cambridge, GB;
Mineral Industry Research Organisation, London, GB;
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).