Central Glass and Ceramic Research Institute

About: Central Glass and Ceramic Research Institute is a facility organization based out in Kolkata, West Bengal, India. It is known for research contribution in the topics: Microstructure & Sintering. The organization has 1123 authors who have published 2904 publications receiving 51519 citations.

Properties of Ni/YSZ Porous Cermets Prepared by Electroless Coating Technique for SOFC Anode Application

Abstract: A conceptual nickel–yttria stabilized zirconia (Ni/YSZ) cermet has been prepared by coating YSZ particles with metallic nickel using electroless coating technique. Concentration of nickel was varied between 5 and 60 vol%. Bulk samples were prepared by uniaxial pressing followed by sintering in the temperature range 1,200–1,350 °C with a soaking time of 2–6 h. Thorough investigation on the electrical characteristics, thermal expansion behavior of the samples have been performed as a function of Ni-content in the cermet. Thermal expansion behavior and conductivity measurement results suggest that the samples prepared by this technique are suitable for solid oxide fuel cell (SOFC) anode application at Ni concentration as low as 20 vol%.

Processing and Properties of Eu3+:LiTaO3 TransparentGlass–Ceramic Nanocomposites

Abstract: We report here the processing and properties of transparent glass and glass-ceramic nanocomposites in the Li 2 O―Ta 2 O 5 ―SiO 2 ― Al 2 O 3 system in the presence of Eu 2 O 3 as luminescent probe. The formation of the LiTa0 3 crystal phase, the crystallite size, and the morphology with the progression of heat treatment have been examined by X-ray diffraction (XRD), transmission electron microscopy (TEM), and Fourier transformed infrared reflectance spectroscopy measurements. The crystallite sizes obtained from XRD and TEM are found to increase with heat-treatment time and vary in the range of 2-20 nm. The measured phototuminescence spectra exhibit emission transitions of 5 D 0,1 → F j (j = 0, 1, 2, 3, and 4) of Eu 3+ ions. From the nature of the emission transitions, the site symmetry in the vicinity of Eu 3+ ions has been found to be near C 3v in the glass-ceramic nanocomposites. An inverse correlation has been observed between the asymmetric ratio (I ED /I MD ) of Eu 3+ ions and the dielectric constant (e r ), with an increase in the heat-treatment time of glass, which is caused by the dipole―dipole interaction.