Study of Structural, Morphological and Electrical Conductivity Proporties of Perovskite 0.075CaSnO₃-0.925NaNbO₃

The extraordinary quality of perovskite materials has aroused the interest of several researchers. In this context, we examine the structural, morphological, vibrational, electrical and dielectric proporties of the ceramic compound Ca_0.075Na_0.925Sn_0.075Nb_0.925O₃ which was produced by a solid process at high temperature. The powder XRD pattern, analysed using the Rietveld refinement method, revealed that the sample presents a single phase and crystallizes in the P4mm tetragonal space group. The tolerance factor t calculated is 0.96. This value is significant because the stability of perovskite materials is a crucial factor for their use in various applications, particularly in optoelectronic devices such as solar cells and LEDs. The crystallite size value of CNSNO is approximate 20.3 nm. Additionally, the uniform chemical makeup is revealed by energy dispersive X-ray (EDX). The overall findings of the electrical investigation seek to advance our understanding of the thermally triggered conduction processes of the chemical under study through impedance spectroscopy. The resistances at both the bulk and grain boundaries were observed to decrease with rising temperature, affirming that the manufactured material possesses a negative temperature coefficient of resistance (NTCR), suggesting the semiconducting behaviour of the material. The conductivity study's discovery of the semiconductor nature suggests that our sample has potential for use in optoelectronic applications. Electrical studies conducted over various frequency and temperature ranges have highlighted dominant transport mechanisms, suggesting that the correlated barrier hopping (CBH) conduction model is the primary mode of conduction.