Yttria-stabilized zirconia-based ceramic sensors for hydrothermal applications
Stabilized-doped Zirconium Oxide ceramics for high temperature O2 sensing in harsh environments have become common in industrial, environmental and automotive applications. These ceramics can be used effectively in many harsh environments to sense the pH of solutions above 83℃ and at pressures as high as 101.3 kPa. One particular commercially-available ceramic shows promise during our experiments at 91 ℃over the pH range from 1.6-9.6. Experiments have surpassed more than 8,000-hours of continuous exposure in a laboratory flow-through test at 101.3 kPa and demonstrate near-Nernstian behavior. The sensor shows impressive reaction times, in the order of minutes, to changes in the pH of the test solution. The sensor is constructed with the reference voltage provided by Hg-HgO paste and has a response of approximately 66 mV per pH unit at 91 ℃, which allows the sensor to operate in a very wide range of solutions.
M.F.Manna G.C.Ulmer D.E.Grandstaff
Temple University, Department of Geology, Philadelphia, PA, USA
国际会议
第十二届水-岩相互作用国际研讨会(P0roceedings of the 12th International Symposium on Water-Rock Interaction)
昆明
英文
233-236
2007-07-31（万方平台首次上网日期，不代表论文的发表时间）