Nd3+ added Mg– Cd ferrite material study the thick film gas sensing properties

Abstract

The general formula Mg1-x Cd x Fe2O4 (x = 0.0,0.1,0.3, 0.5, 0.7) was used to prepare 5 wt % Nd3+ nano crystallite ferrite samples using the oxalate co-precipitation method. XRD, SEM, and FT-IR were used to characterize the samples. The cubic spinel structure was confirmed by XRD, which revealed an orthoferrite (NdFeO3) secondary phase. In the range of 350–800 cm−1, Mg–Cd ferrites show two distinct bands of absorption. In Mg–Cd ferrites, the surface morphology SEM study shows that grain size increases with Cd2+ concentration and decreases with Nd3+ presence. The response of Mg–Cd ferrites with Nd3+ is higher than that of Mg–Cd ferrites without Nd3+. With an increase in Cd2+ concentration, the response and recovery times of Nd3+ added Mg–Cd ferrites are speed up. Cd ferrite sensors combined with Nd3+ have faster response and recovery times than other samples. These differences are dependent on the test gas's composition as well as the material's grain size.