1. (Ti,Sn) solid solution-based gas sensors for new monitoring of hydraulic oil degradation
- Author
-
A. Fioravanti, Pietro Marani, Giorgio Paolo Massarotti, Stefano Lettieri, Sara Morandi, Maria Cristina Carotta, Fioravanti, A., Marani, P., Massarotti, G. P., Lettieri, S., Morandi, S., and Carotta, M. C.
- Subjects
Test bench ,Materials science ,Sn) solid solution ,(Ti,Sn) solid solution ,Hydraulic fluid ageing ,Mineral oil headspace analysis ,Thick film gas sensors ,Oxide ,mineral oil headspace analysis ,02 engineering and technology ,010402 general chemistry ,lcsh:Technology ,01 natural sciences ,Article ,Physics::Fluid Dynamics ,chemistry.chemical_compound ,Mineral oil headspace analysi ,(Ti-Sn) solid solution ,General Materials Science ,lcsh:Microscopy ,MOX fuel ,ComputingMethodologies_COMPUTERGRAPHICS ,lcsh:QC120-168.85 ,Sensor system ,lcsh:QH201-278.5 ,lcsh:T ,hydraulic fluid ageing ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,(Ti ,Fluid power ,Chemical engineering ,chemistry ,lcsh:TA1-2040 ,Degradation (geology) ,Hydraulic fluid ,lcsh:Descriptive and experimental mechanics ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,lcsh:Engineering (General). Civil engineering (General) ,0210 nano-technology ,thick film gas sensors ,lcsh:TK1-9971 ,Solid solution - Abstract
The proper operation of a fluid power system in terms of efficiency and reliability is directly related to the fluid state, therefore, the monitoring of fluid ageing in real time is fundamental to prevent machine failures. For this aim, an innovative methodology based on fluid vapor analysis through metal oxide (shortened: MOX) gas sensors has been developed. Two apparatuses were designed and realized: (i) A dedicated test bench to fast-age the fluid under controlled conditions, (ii) a laboratory MOX sensor system to test the headspace of the aged fluid samples. To prepare the set of MOX gas sensors suitable to detect the analytes’ concentrations in the fluid headspace, different functional materials were synthesized in the form of nanopowders, characterizing them by electron microscopy and X-ray diffraction. The powders were deposited through screen-printing technology, realizing thick-film gas sensors on which dynamical responses in the presence of the fluid headspace were obtained. It resulted that gas sensors based on solid solution TixSn1–xO2 with x = 0.9 and 0.5 offered the best responses toward the fluid headspace with lower response and recovery times. Furthermore, a decrease in the responses (for all sensors) with fluid ageing was observed.
- Published
- 2021