TY - GEN
T1 - VISTA Instrument
T2 - 5th IEEE International Workshop on Metrology for AeroSpace
AU - Dirri, F.
AU - Palomba, E.
AU - Longobardo, A.
AU - Biondi, D.
AU - Boccaccini, A.
AU - Galiano, A.
AU - Zampetti, E.
AU - Saggin, B.
AU - Scaccabarozzi, D.
AU - Martin-Torres, J.
PY - 2018/9/3
Y1 - 2018/9/3
N2 - VISTA (Volatile In Situ Thermogravimetry Analyser) is a μ-Thermogravimeter sensor developed by Consortium of Italian Institutes. ThermoGravimetric Analysis (TGA) is a widely used technique to monitor thermal processes involving volatile compounds, e.g.deposition/sublimation and absorption/ desorption. The instrument core is composed by a Piezoelectric Crystal Microbalance (PCM), equipped with built-in heater and built-in temperature sensor, and provided of its own Proximity Electronics (PE). The PCM oscillation frequency linearly depends on the mass deposited on its sensible area (according to Sauerbrey equation) while the PCM temperature can be increased by means of integrated heaters. Thus, mass and volatile composition can be inferred by the frequency change and by desorption temperature, respectively. The instrument is divided in two sensor heads: VISTA1, able to monitor outgassing processes in space, and VISTA2, able to reach higher temperatures, studying the dehydration and organics decomposition in minerals in different environmental conditions. An Engineering Model of VISTA1 and a laboratory breadboard of VISTA2 have been developed. Pure organic compounds and contaminant have been characterized by using deposition processes and TGA cycles obtaining some physical-chemical parameters, i.e. enthalpy of sublimation/evaporation, Δ Hsub,evap , deposition rates, k and vapor pressures, P vap . The instrument concept, the scientific objectives and the laboratory measurements are explained in this work.
AB - VISTA (Volatile In Situ Thermogravimetry Analyser) is a μ-Thermogravimeter sensor developed by Consortium of Italian Institutes. ThermoGravimetric Analysis (TGA) is a widely used technique to monitor thermal processes involving volatile compounds, e.g.deposition/sublimation and absorption/ desorption. The instrument core is composed by a Piezoelectric Crystal Microbalance (PCM), equipped with built-in heater and built-in temperature sensor, and provided of its own Proximity Electronics (PE). The PCM oscillation frequency linearly depends on the mass deposited on its sensible area (according to Sauerbrey equation) while the PCM temperature can be increased by means of integrated heaters. Thus, mass and volatile composition can be inferred by the frequency change and by desorption temperature, respectively. The instrument is divided in two sensor heads: VISTA1, able to monitor outgassing processes in space, and VISTA2, able to reach higher temperatures, studying the dehydration and organics decomposition in minerals in different environmental conditions. An Engineering Model of VISTA1 and a laboratory breadboard of VISTA2 have been developed. Pure organic compounds and contaminant have been characterized by using deposition processes and TGA cycles obtaining some physical-chemical parameters, i.e. enthalpy of sublimation/evaporation, Δ Hsub,evap , deposition rates, k and vapor pressures, P vap . The instrument concept, the scientific objectives and the laboratory measurements are explained in this work.
KW - Contamination
KW - Organic and volatile characterization
KW - Piezoelectric Crystal Microbalance
KW - Space missions
KW - Thermogravimetric technique
KW - crystal
KW - Microbalance
KW - organic and volatile characterization
KW - space missions
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85053898913&partnerID=MN8TOARS
U2 - 10.1109/MetroAeroSpace.2018.8453532
DO - 10.1109/MetroAeroSpace.2018.8453532
M3 - Published conference contribution
SN - 9781538624753
SP - 150
EP - 154
BT - 5th IEEE International Workshop on Metrology for AeroSpace, MetroAeroSpace 2018 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 20 June 2018 through 22 June 2018
ER -