SOLID ELECTROLYTE FOR MEASURING ACTIVITY OF THALLIUM IN GAS PHASE, METHOD FOR ITS PRODUCTION AND DEVICE Russian patent published in 2021 - IPC C04B35/113 C04B41/80 G01N27/407 

FIELD: measuring equipment.

SUBSTANCE: invention relates to a solid electrolyte for measuring activity of thallium in gas phase by a method for potentiometric electrochemical analysis, its manufacturing technology, as well as for measuring activity of thallium in gas phase by a method for potentiometric electrochemical analysis, which, in particular, can be used to monitor activity in high-temperature steam during the operation of saturation with thallium vapors of thallium high-temperature superconductors (Tl HTSC). The solid electrolyte based on Tl-β alumina is made of ceramics, which is a product of an ion exchange reaction between Na-β-alumina and solid thallium (I) sulfate. The ion exchange reaction is carried out at a temperature of 400-600°C and an applied pressure of 0.01-0.1 MPa. A sensor device for measuring activity of thallium in gas phase contains a sealed case, a thallium source including thallium and/or its chemical compounds, placed in the case with the possibility of forming a working electrode representing analyzed gas phase, a plate of a solid electrolyte based on Tl-β alumina, a reference electrode and current leads for measuring the potential difference between the mentioned working electrode and the reference electrode. The reference electrode is made of a mechanical mixture of Tl-β alumina and α-Al2O3, the mentioned current leads are made in the form of mesh coating of noble metal or its alloy applied to both sides of the solid electrolyte plate, wherein the coating on the side of the reference electrode does not contact the case, and on the side of the working electrode, the coating contacts the case.

EFFECT: creation of a solid electrolyte based on Tl-β alumina, which has good mechanical strength, and an electrochemical sensor with this electrolyte, capable of measuring activity of thallium in gas phase.

9 cl, 4 dwg, 1 ex