title: Sol-gel synthesized semiconducting LaCo0.8Fe0.2O3-based powder for thick film NH3 gas sensor.
abstract: Perovskite type LaCo(x)Fe(1-x)O(3) nanoparticles was synthesized by a sol-gel citrate method. The structural, electrical and sensing characteristics of the LaCo(x)Fe(1-x)O(3) system were investigated. The structural characteristics were performed by using X-ray diffraction (XRD) and transmission electron microscopy (TEM) to examine the phase and morphology of the resultant powder. The XRD pattern shows nanocrystalline solid solution of LaCo(x)Fe(1-x)O(3) with perovskite phase. Electrical properties of synthesized nanoparticles are studied by DC conductivity measurement. The sensor shows high response towards ammonia gas in spite of other reducing gases when x=0.8. The effect of 0.3 wt.% Pd-doped LaCo(0.8)Fe(0.2)O(3) on the response and a recovery time was also addressed.
authors.affiliation: Nano Technology Research Laboratory, Department of Chemistry, Shri Shivaji Science College, Amravati 444602, M.S., India. nano.d@rediffmail.com
authors.forename: G N
authors.initials: GN
authors.lastname: Chaudhari
authors.forename: S V
authors.initials: SV
authors.lastname: Jagtap
authors.forename: N N
authors.initials: NN
authors.lastname: Gedam
authors.forename: M J
authors.initials: MJ
authors.lastname: Pawar
authors.forename: V S
authors.initials: VS
authors.lastname: Sangawar