Title :
Studies on the oxygen sensing characteristics of SrFe1−xTixO3-δ
Author :
Prabhu, E. ; Gnanasekar, K.I. ; Jayaraman, V. ; Gnanasekaran, T.
Author_Institution :
Chem. Group, Indira Gandhi Centre for Atomic Res., Kalpakkam, India
Abstract :
Compositions of nominal formula, SrFe1-xTixO3-δ (x = 0 - 0.8) were prepared by solid state method and characterized by X-ray diffraction and Mossbauer spectroscopic studies. Electrical conductivities of these samples were studied at different temperatures in three different oxygen concentrations. Thin films of SrFe0.2Ti0.8O3-δ and SrFe0.35Ti0.65O3-δ were deposited on polycrystalline alumina using pulsed laser deposition (PLD) technique. These films were found sensing changes in percentage levels of oxygen concentration. The optimum operating temperature of the sensor was found to be 698 K. The response and recovery times were 5 and 15 s respectively.
Keywords :
Mossbauer effect; X-ray diffraction; chemical sensors; chemical variables measurement; electrical conductivity; iron compounds; oxygen; pulsed laser deposition; semiconductor growth; semiconductor materials; semiconductor thin films; strontium compounds; thin film sensors; Al2O3; Mossbauer spectroscopy; O2; PLD; SrFe1-xTixO3-δ; X-ray diffraction; electrical conductivities; oxygen concentrations; oxygen sensing; polycrystalline alumina; pulsed laser deposition; recovery time; response time; solid state method; temperature 698 K; thin films; time 15 s; time 5 s; Conductivity; Iron; Resistance; Solids; Temperature measurement; Temperature sensors;
Conference_Titel :
Physics and Technology of Sensors (ISPTS), 2015 2nd International Symposium on
Conference_Location :
Pune
DOI :
10.1109/ISPTS.2015.7220140
