Role of some rare earth (RE) ions (RE = La, Pr, Nd, Sm, Gd and Dy) in crystal and mechanical behaviours of sol–gel derived ZrO2–2 mol% RE2O3 spun fibres calcined at 1300°C
M K Naskar M Chatterjee D Ganguli
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Crystal behaviours such as crystallization temperature (amorphous to tetragonal (𝑡) zirconia), tendency of phase transformation (tetragonal to monoclinic (𝑚) zirconia) and lattice strain were studied with mechanical property e.g. tensile strength of sol–gel derived ZrO2–2 mol% RE2O3 (RE = La, Pr, Nd, Sm, Gd and Dy) spun fibres. Rare earth cations of varying sizes played a significant role in changing the above mentioned properties of ZrO2–2 mol% RE2O3 fibres. It was found that with decreasing the ionic size difference between the zirconium and RE ions, crystallization temperature (amorphous $\rightarrow \ t$-ZrO2) decreased, the probability of phase transformation ($t \rightarrow m$) decreased, lattice strain which is related to lattice distortion decreased and tensile strength increased.
M K Naskar1 M Chatterjee1 D Ganguli1 2
Volume 46, 2023
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Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020
Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020
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