Structural, thermal, and electrical properties of (100−x) ZrO2 (x) Bi2O3 compound
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Composition (100−x) ZrO2 (x) Bi2O3 (x = 15, 20, 25) is synthesized by solid-state reaction method to study the effect of Bi2O3 doping on ZrO2. The as-prepared samples are characterized by various methods. The X-ray diffraction pattern of all these samples exhibits three phases, namely, m-ZrO2, βIII-Bi2O3, and γ-Bi2O3. The differential thermal analysis curves do not show any phase transition/decomposition, which clearly indicated the stabilization of γ-Bi2O3 phase. The conductivity changes in all the samples are discussed in terms of different phase formations and their volume fractions. The microstructural and energy dispersive analyses indicate the presence of different phases. A maximum conductivity at high temperature (800 °C) was observed for the x = 25 composition, i.e., σ = 4.21 × 10−2 S/cm.
KeywordsIonic conductivity ZrO2–Bi2O3 system Microstructure DTA/TGA
The authors are very grateful to Mr. P.K. Singh of the SPMS, Thapar University, Patiala for his help to take the SEM measurements. We are also very grateful to the University Grants Commission (UGC), New Delhi, India for providing the financial grant under vide letter no. 34-1 (Pun) SR dated 30/12/2008.
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