Synthesis and characterization of doped bismuth(iii) oxides with silenite and defect fluorite structure

Abstract

Numerous phases with sillenite (γ-Bi2O3) and defect fluorite (δ-Bi2O3) structure have been prepared in pseudo-binary Bi2O3–MxOy systems, where M = Ag, Li, Pb, Zn, Al, Fe, Tm, Ce, Hf, Mn, Si, Ti, V, W, Cr, and pseudo-ternary Bi2O3–M1xOy–M2xOy systems, where M1 = Pb, Zn, Ti and M2 = Zn, Ti, Si. The products mainly prepared by high-temperature reactions were characterized by the following techniques: X-ray powder diffraction, differential thermal analysis, scanning electron microscopy, energydispersive X-ray spectroscopy, high resolution transmission electron microscopy, selected area electron diffraction and electrochemical impedance spectroscopy...

U disertaciji je opisano dobijanje velikog broja faza sa silenitskom (γ-Bi2O3) i defektnom fluoritskom (δ-Bi2O3) strukturom, ispitivanih u pseudo-binarnim sistemima Bi2O3–MxOy, gde je M = Ag, Li, Pb, Zn, Al, Fe, Tm, Ce, Hf, Mn, Si, Ti, V, W i Cr, i pseudo-ternarnim sistemima Bi2O3–M1xOy–M2xOy, gde je M1 = Pb, Zn i Ti, M2 = Zn, Ti i Si. Glavni sintetski postupak bio je termohemijski, a korišćene su sledeće metode karakterizacije: rendgenska difrakcija na polikristalnim uzorcima, diferencijalna termijska analiza, skenirajuća elektronska mikroskopija, rendgenska spektroskopija sa skeniranjem energija, transmisiona elektronska mikroskopija visoke rezolucije, elektronska difrakcija i elektrohemijska impedansna spektroskopija...