Giant dielectric response nonlinear characteristics and humidity sensing properties of a novel perovskite Na1/3Sr1/3Tb1/3Cu3Ti4O12

Abstract

In this study we unveil a novel perovskite compound Na1/3Sr1/3Tb1/3Cu3Ti4O12 synthesized through a solid-state reaction method exhibiting remarkable giant dielectric response nonlinear characteristics and humidity sensing capabilities. This research highlights the emergence of a Cu-rich phase the properties of which undergo significant alterations depending on the sintering conditions. The optimization of sintering parameters encompassing a temperature range of 1040-1450 ?C for 1-8 h resulted in substantial dielectric permittivity (??) values (?2800-6000). The temperature dependence of ?? demonstrated relationship to the particular sintering conditions utilized. The acquired loss tangent values were situated within encouraging values ranging from 0.06 to 0.16 at 1 kHz. Furthermore the material revealed distinct nonlinear electrical characteristics at 25 ?C with the nonlinear coefficient values of 5-127 depending on ceramic microstructures. Additionally we delved deeply into the humidity-sensing properties of the Na1/3Sr1/3Tb1/3Cu3Ti4O12 material showing a considerable variation in ?? in response to fluctuations in relative humidity thereby indicating its prospective application in humidity sensing technologies. The hysteresis error and response/recovery times were calculated highlighting the versatility of this compound and its promising potential across multiple applications. The Na1/3Sr1/3Tb1/3Cu3Ti4O12 not only shows remarkable giant dielectric responses but also portrays significant promise for nonlinear and humidity sensing applications marking it as a significant participant in the advancement of perovskite-based functional materials. ? 2023 The Royal Society of Chemistry.