Development of yttria-doped thoria solid electrolyte for use in liquid sodium systems

Abstract

Electrolytic grade yttria-doped thoria (YDT) was synthesized by a novel combustion method. Sintering studies were carried out with polyvinyl alcohol as binder or ZnO as sintering aid to obtain high-density product. The sintering temperature has been optimized as 1,923 K. The results showed that when ZnO was used and sintered at 1,923 K, high-density YDT pellets were obtained, which met the required helium leak rate of the order of ∼10 −9 std. l/s.

Review—Evolution of the Development of In-Sodium Oxygen Sensor and Its Present Status

“…51 Sinterability of the YDT bodies made using these powders at 1923 K in air was established and the sintered products were found to exhibit < 10 −9 S lit/s helium leak tightness. 52 Initially sensors were made using small thimbles, projecting out of an alloy part (Fig. 3c) with In/In 2 O 3 as reference electrode and tested in static sodium.…”

Development of Sensors for On-Line Monitoring of Nonmetallic Impurities in Liquid Sodium

“…l/s. 25) To check the quality of the solid electrolyte material, an electrochemical cell was assembled using the YDT disc with Ni/NiO on one side and Fe/FeO on the other side, and the cell output was measured as a function of temperature in the range from 623 to 823 K. The emf values obtained were found to be in good agreement with the calculated values, as shown in Table 1, indicating the absence of electronic transport in the electrolyte.…”

Development of Zirconia Based Oxygen Sensor for Lead and Lead-Bismuth Eutectic

“…Thermal decomposition and mass loss characteristics of the polymeric precursors were studied by simultaneous thermogravimetric and differential thermal analyser (M/s Setaram, France) and the ignition temperatures of the precursors were determined. To avoid the violent combustion reaction the precursors obtained were subjected to a controlled heating scheme near to their ignitation temperature derived from the TG/DTA experiment [8]. The resulting powders were calcined at 750°C for 2 h under flowing air.…”