Cover page describe the Typical fracture surface of nuclear graphite blocks after irradiation (cracks occur during reactor operation). This picture Summarize the Fractographic studies of GR-280 nuclear graphite after irradiation up to neutron fluence above the turnaround dose (with a decrease in of the mechanical properties to the values close to the initial one after primary radiation-induced increase) showed along with the presence of transcrystalline fracture, appearance of intercrystalline fracture regions along the “filler-binder” type boundaries.
Synthesis and characterization of pure BiFeO3 using various complexing agents by Sol-gel method
Balesh Kumar Vashisth1, 2*, Jarnail S. Bangruwa2, S. P. Gairola1, Vivek Verma2
1Department of Physics, Uttaranchal University, Dehradun, India
2Department of Physics, Hindu College, University of Delhi, Delhi, India
Adv. Mater. Lett., 2018, 9 (11), pp 805-810
Publication Date (Web): Jul 25, 2018
Copyright © 2019 VBRI Press
Pure BiFeO3 (BFO) nanoparticles were prepared using various complexing agents like citric acid, malonic acid, succinic anhydride and tartaric acid by sol-gel method annealed at different temperatures (400 °C, 500 °C, 600 °C). X-Ray diffraction pattern of various samples show the degree of formation of required phase. Particle size of pure phase BFO has been shown using TEM image. Scanning Electron Microscopy studies for different samples give detailed study of morphology of samples. Ferroelectric and magnetic studies of best prepared samples show their comparative multiferroic properties. Dielectric analysis also shows the variation in dielectric loss, real and imaginary part of permittivity versus frequency at room temperature.
BiFeO3, multiferroic, complexing agents, ferroelectric, magnetic.