Abstract: A method is provided for influencing the properties of cast iron by adding magnesium to the cast iron melt and measuring the oxygen content of the cast iron melt. Magnesium is added to the cast iron melt until the oxygen content of the cast iron melt is approximately 0.005 to 0.2 ppm at a temperature of approximately 1,420° C. A sensor for measuring the oxygen content in cast iron melts contains an electrochemical measuring cell containing a solid electrolyte tube.

Abstract: A method is provided for influencing the properties of cast iron by adding magnesium to the cast iron melt and measuring the oxygen content of the cast iron melt. Magnesium is added to the cast iron melt until the oxygen content of the cast iron melt is approximately 0.005 to 0.2 ppm at a temperature of approximately 1,420° C. A sensor for measuring the oxygen content in cast iron melts contains an electrochemical measuring cell containing a solid electrolyte tube.

Abstract: A method is provided for influencing the properties of cast iron by adding magnesium to the cast iron melt and measuring the oxygen content of the cast iron melt. Magnesium is added to the cast iron melt until the oxygen content of the cast iron melt is approximately 0.005 to 0.2 ppm at a temperature of approximately 1,420° C. A sensor for measuring the oxygen content in cast iron melts contains an electrochemical measuring cell containing a solid electrolyte tube.

Abstract: A method is provided for influencing the properties of cast iron by adding magnesium to the cast iron melt and measuring the oxygen content of the cast iron melt. Magnesium is added to the cast iron melt until the oxygen content of the cast iron melt is approximately 0.005 to 0.2 ppm at a temperature of approximately 1,420° C. A sensor for measuring the oxygen content in cast iron melts contains an electrochemical measuring cell containing a solid electrolyte tube.

Abstract: A measurement device is provided for determining the oxygen activity in molten metal or slag with a measurement head, which is arranged on one end of a carrier tube and on which an electrochemical measurement cell is arranged. The electrochemical measurement cell has a solid electrolyte tubule, which is closed on one side and which contains on its closed end a reference material and an electrode, which projects from the opposite end of the solid electrolyte tubule. The solid electrolyte tubule has on its outer surface a coating made from a mixture of zirconium silicate with a fluoride. The measurement head may also have a thermo-element, and the device may be used to determine the concentration of silicon and/or carbon in the melt, based on the oxygen activity measurement.

Abstract: A measurement device is provided for determining the oxygen activity in molten metal or slag with a measurement head, which is arranged at one end of a carrier tube and on which an electrochemical measurement cell is arranged. The electrochemical measurement cell has a solid electrolyte tube, which is closed at one end and which contains a reference material and an electrode at its closed end. The electrode projects from the opposite end of the solid electrolyte tube. The outer surface of the solid electrolyte tube has a coating of a mixture of calcium zirconate with a fluoride. The measurement device can be used for calculating the sulfur, silicon and/or carbon content of the molten metal or slag from reaction of the sulfur with the calcium zirconate, which releases oxygen, and measurement of the resulting change in oxygen activity of the melt or slag at the outer surface of the solid electrolyte tube.

Abstract: A measurement device is provided for determining the oxygen activity in molten metal or slag with a measurement head, which is arranged on one end of a carrier tube and on which an electrochemical measurement cell is arranged. The electrochemical measurement cell has a solid electrolyte tubule, which is closed on one side and which contains on its closed end a reference material and an electrode, which projects from the opposite end of the solid electrolyte tubule. The solid electrolyte tubule has on its outer surface a coating made from a mixture of zirconium silicate with a fluoride. The measurement head may also have a thermo-element, and the device may be used to determine the concentration of silicon and/or carbon in the melt, based on the oxygen activity measurement.

Abstract: A measurement device is provided for determining the oxygen activity in molten metal or slag with a measurement head, which is arranged at one end of a carrier tube and on which an electrochemical measurement cell is arranged. The electrochemical measurement cell has a solid electrolyte tube, which is closed at one end and which contains a reference material and an electrode at its closed end. The electrode projects from the opposite end of the solid electrolyte tube. The outer surface of the solid electrolyte tube has a coating of a mixture of calcium zirconate with a fluoride. The measurement device can be used for calculating the sulfur, silicon and/or carbon content of the molten metal or slag from reaction of the sulfur with the calcium zirconate, which releases oxygen, and measurement of the resulting change in oxygen activity of the melt or slag at the outer surface of the solid electrolyte tube.