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.

Microstructure and property evaluation of barium aluminosilicate glass–ceramic sealant for anode-supported solid oxide fuel cell

Abstract: Several glass compositions based on the barium aluminosilicate system have been investigated for their application as sealant for solid oxide fuel cell (SOFC). The developed glasses were characterized through measurement of different properties, viz. coefficient of thermal expansion (CTE), glass transition temperature ( T g ), dilatometric softening temperature ( T d ), crystallization behavior during prolonged heat-treatment, electrical resistivity measurement, microstructural studies, etc. In addition, bonding behavior between zirconia electrolyte and metallic interconnect in sandwiched condition has also been investigated to find out their suitability as sealant for SOFC. Microstructural investigation revealed a well-adhered bonding between the electrolyte and the metallic interconnect. The optimized glass composition also showed a high resistivity (∼10 5 Ω cm) at the SOFC operation temperature (∼800 °C).

Carbothermal synthesis of boron nitride coating on PAN carbon fiber

Abstract: Boron nitride (BN) thin coating has been formed on the surface of chemically activated polyacrylonitrile (PAN) carbon fiber by dip coating method. Dip coating was carried out in saturated boric acid solution followed by nitridation at a temperature of 1200 °C in nitrogen at atmospheric pressure to produce BN coating. Chemical activation improved surface area of PAN fiber which favours in situ carbothermal reduction of boric acid. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) have shown the formation of boron nitride. The X-ray photoelectron spectroscopy reveals that the coating forms a composite layer of carbon, BN/BOxNy and some graphite like BCN with local structure of B–N–C and B(N–C)3. The oxidation resistance of the coated fiber was significantly higher than uncoated carbon fiber. Tensile strength measurement reveals that the BN coated fiber maintained 90% of its original strength. As compared to chemical vapor deposition (CVD), this process is simple, non-hazardous and is expected to be cost effective.

A study of regenerated gratings produced in germanosilicate fibers by high temperature annealing

Abstract: In light of recent proposals linking structural change and stresses within regenerated gratings, the details of regeneration of a seed Type-I Bragg grating written in H2 loaded germanosilicate fiber annealed at high temperatures (~900°C) are systematically explored In particular, the influence of the strength of the grating, the effect of GeO2 doping concentration and the annealing conditions on regeneration are studied We show that the role of dopants such as Ge and F contribute nothing to the regeneration, consistent with previous results Rather, they may potentially be detrimental Strongest regenerated gratings with R ~35% from a 5mm seed grating could be obtained in fibres with the lowest GeO2 concentrations such as standard telecommunications-compatible grade fibre