Synthesis and Study the Impact of Annealing Temperature on Structural, Electrical and Gas Sensing Properties of LaCrO₃ Thick Films

Abstract

In this work, LaCrO₃ nanostructure were modified with annealing temperature. The present work deals with the study of the impact of annealing temperature on the structural, electrical and gas sensing properties of LaCrO₃ thick films. The thick films of LaCrO₃ were developed on glass substrate by screen printing technique. The LaCrO₃ nanostructure was synthesized by sol–gel method. The characterizations were carried out by using standard tools like X-ray diffraction (XRD), energy-dispersive X-ray (EDX) and scanning electron microscopy (SEM) revealed the confirmation of a crystal structure, elemental analysis and the morphology of synthesized LaCrO₃ respectively. The impact of annealing temperature on selected properties of LaCrO₃ thick films were successfully studied. The investigation suggested that, the annealed thick films possess better results than unannealed films. The developed LaCrO₃ thick films were used to detect various hazardous air pollutants such as NO₂, CH₄, LPG, ethanol, NH₃ and petrol vapor. LaCrO₃ thick films shows maximum sensitivity to nitrous oxide gas at operating temperature 160 °C. The films also demonstrated quick response and recovery time.