摘要:
A DEVICE FOR MEASURING OXYGEN CONTENT OF FLUIDS AT ELEVATED TEMPERATURE COMPRISES A GALVANIC CELL WITH A SOLID OXIDE ELECTROLYTE AND A REFERENCE ELECTRODE OF A MIXTURE OF CHROMIUM OR AN ALLOY THEREOF AND CR2O3. WHEN THE FLUID, ACTING AS THE OTHER ELECTRODE, CONTACTS THE ELECTROLYTE, THE RESULTING EMF INDICATES OXYGEN CONTENT. PROVISION IS
ALSO MADE FOR SIMULTANEOUS TEMPERATURE DETERMINATION AND FOR ELECTRICAL CONTACT WITH FLUIDS, SUCH AS LIQUID STEEL.
摘要:
A gel for use in a pH or an ORP sensor, components of the gel comprising water, a reference electrolyte salt, a buffering system for adjusting pH of the gel, and a polymeric gelling agent, and the gel does not degrade under gamma irradiation.
摘要:
The present invention relates to an electrochemical sensor for determining the concentration of a group IA metal in a fluid such as molten metal. The sensor comprises a substantially pure quantity of the group 1A metal as a reference electrode (13) contained in a sensor housing (3), and a solid electrolyte constituting at least part of the sensor housing (3). The electrolyte is in electrical contact with the reference electrode (13) and the sensor is capable of operating at temperatures in excess of 973K. In a preferred arrangement, the sensor comprises a two part elongate conductor (15), a first part (17) of which extends from the reference electrode (13) into a refractory seal (11a), and a second part (19) of which extends from within the refractory seal (11a) externally of the sensor, the two parts (17, 19) being welded together.
摘要:
The present invention relates to an electrochemical sensor for determining the concentration of a group IA metal in a fluid such as molten metal. The sensor comprises a substantially pure quantity of the group 1A metal as a reference electrode (13) contained in a sensor housing (3), and a solid electrolyte constituting at least part of the sensor housing (3). The electrolyte is in electrical contact with the reference electrode (13) and the sensor is capable of operating at temperatures in excess of 973K. In a preferred arrangement, the sensor comprises a two part elongate conductor (15), a first part (17) of which extends from the reference electrode (13) into a refractory seal (11a), and a second part (19) of which extends from within the refractory seal (11a) externally of the sensor, the two parts (17, 19) being welded together.
摘要:
The method of electrochemical determination of oxygen partial pressure in ionic melts includes providing a metal/metal oxide reference electrode consisting of an electrode body made of a metal selected from the group consisting of Mo, W, Hf, Nb and Ta and alloys thereof and a layer of an oxide of that metal on the electrode body; immersing a pure platinum electrode and the metal/metal oxide reference electrode in a glass melt; measuring a potential across the metal/metal oxide reference electrode and the pure platinum electrode immersed in the glass melt to obtain a measured potential characteristic of the oxygen partial pressure in the glass melt; obtaining a calibration curve relating the potential across said reference electrode and the pure platinum electrode to the oxygen partial pressure in the glass melt as a function of temperature; and obtaining the oxygen partial pressure in the glass melt from the measured potential and the calibration curve. Either the calibration curve is obtained experimentally by immersing a Zirconium dioxide electrode in the glass melt and measuring a potential difference between the metal/metal oxide reference electrode and the Zirconium dioxide electrode at a plurality of temperatures or theoretically from thermodynamic data for the metal/metal oxide reference electrode.
摘要:
An expandable immersion oxygen sensor for molten metal is provided with an improved oxygen reference electrode including Cr, Cr.sub.2 O.sub.3, NiO, and Fe and the oxygen electrode and thermocouple are secured in the face of the sensor by resin-sand to reduce initial overshoot and failure due to thermal shock.
摘要翻译:提供了一种用于熔融金属的可膨胀浸入式氧传感器,其具有包括Cr,Cr 2 O 3,NiO和Fe的改进的氧参比电极,并且氧电极和热电偶通过树脂砂固定在传感器的表面以减少初始过冲和故障 热冲击。
摘要:
In the reference electrode for the oxygen probe comprising a mixture of Cr powder and Cr.sub.2 O.sub.3 powder, an improved reference electrode characterized in that Cr powder and Cr.sub.2 O.sub.3 powder are mixed in a ratio 97%:3% to 80%:20% and the mixture is sintered beforehand. An oxygen probe using this electrode exhibits improved response, stability and reproducibility in molten steel.
摘要翻译:在包含Cr粉末和Cr 2 O 3粉末的混合物的氧探针的参比电极中,改进的参比电极的特征在于Cr粉末和Cr 2 O 3粉末以97%:3%至80%:20%的比例混合,并且混合物 预先烧结。 使用该电极的氧探针在钢水中表现出改善的响应,稳定性和再现性。
摘要:
A solid electrolyte probe for direct immersion into a molten material, such as molten copper, to determine the oxygen content thereof. A tubular receptacle fabricated from a solid electrolyte, such as stabilized zirconia, and adapted to hold an oxygen-containing material, has its open upper end protectively closed by a vertically elongate, relatively massive, refractory cap which has a longitudinal passage therethrough to accommodate the electrical lead for the probe electrode and is long enough to protect the tubular receptacle against both unrepresentative, high-oxygen molten material and the molten material-air interface, and to protect both the tubular receptacle and the electrical conductor against splash of the molten material that could otherwise lead to short circuiting of the electrical signals.