Synthesis of the compound Sr2Pb0.75Bi0.25O4 by co-precipitaion method and investigate some of its physical properties

Abstract

The perovekites and its derivates like Ruddlesden-Popper series of the general formula A_n+1B_nO_3n+1, have a lot of important properties such as electrical, magnetic, and optical properties, alongside its cationic acumination flexibility in both A and B sites, therefor substituting capability which leads to physical properties modifications, hence, developing novel properties, in the light of the above mentioned, in this research we have synthesized the compound Sr₂PbO₄ which crystallizes in Orthorhombic structure via coprecipitation route for the first time, and the compound Sr₂Pb_0.75Bi_0.25O₄ by partial substation of lead with bismuth in x=0.25 ratio. By studying the XRD Patterns it was concluded that the compounds crystallize in Orthorhombic structure (space group Pbam) after the substation was made, a minor reduction in a and c cell parameters were noticed, and by that observation we concluded that the majority of bismuth is in the 5+ oxidation state, the electrical properties were studied using LCR meter by altering the current between the two plates in the range -0.5 - + 0.5 by measuring the current at 1kHz frequency, and by the structure study conclusion of 5+ oxidation state of bismuth therefor  the excess electrons will participate in the conduction bond.