New perovskite compound La0.885Pb0.005C

La0.8Pb0.1Ca0.1Fe1−xCoxO3 thin films as ozone-sensitive layers

“…These values are close to those obtained with other compounds considered as nanometric materials for gas-sensing application[22 -24]. "As an example we can cited that in our ancient article, crystallite size is found to be equal to 52.11 nm in case of 𝐿𝑎 0.885 𝑃𝑏 0.005 𝐶𝑎 0.11 Fe𝑂 2.95 sensor which is used for 𝑁𝐻 3 sensing application[22].In addition A.Benali et al. mentioned that their samples 𝐿𝑎 0.8 𝐶𝑎 0.2−𝑥 𝑃𝑏 𝑥 Fe𝑂 2.95 present a crystallites size included between 40.19 nm and 65.51 nm and usually nanocrystals with…”

Effect of Bi-substitution into the A-site of multiferroic La0.8Ca0.2FeO3on structural, electrical and dielectric properties

“…21 Note here that the substitution of lanthanum ions by those of calcium has the effect of reducing electrical resistance and improving magnetic and dielectric properties, which allows the use of these materials La 1Àx Ca x FeO 3 (LCFO) as gas sensors and as a cathode in solid oxide fuel cells (SOFC). [22][23][24][25] In our previous study, we have proved that the relaxation process in La 0.8 Ca 0.2 FeO 3 compound prepared is of polaronic type, which is caused by the jumps of the charge carriers between the different iron ions. 26 The NSPT model (small polaron without overlapping tunnel effect) has been used to study the conduction mechanism of the La 0.8 Ca 0.2 FeO 3 compound.…”

Influence of film-thickness on the ozone detection of perovskite La0.8Pb0.1Ca0.1Fe1−xCoxO3 based sensors

“…Figure 9: La 0.8 Pb 0.1 Ca 0.1 Fe 0.8 Co 0.2 O 3 ( 𝑥𝑥 = 0.20 ) sensor response (𝑆𝑆) to different oxidizing gas (𝑆𝑆 3 ) concentrations (50, 100, 200, 300 and 400 𝑝𝑝𝑝𝑝𝑝𝑝) for a film thickness equal to 300 𝑍𝑍𝑚𝑚 (8 drops) and 600 𝑍𝑍𝑚𝑚 (16 drops) at 𝑇𝑇 𝑂𝑂 = 170 °𝐶𝐶 and for an exposure time equal to 4 𝑚𝑚𝑆𝑆𝑍𝑍.All characteristics of gas sensors, such as signal, response, and recovery times, depend on the gas diffusion effects and the rate of reaction. This phenomenon is demonstrated theoretically, using the model of 𝑆𝑆𝑍𝑍𝑆𝑆 2[37]. When oxygen species are adsorbed, a depletion layer is formed on the surface of the sensing films.…”