Motilal Nehru National Institute of Technology Allahabad

About: Motilal Nehru National Institute of Technology Allahabad is a education organization based out in Allahabad, Uttar Pradesh, India. It is known for research contribution in the topics: Computer science & Control theory. The organization has 2475 authors who have published 5067 publications receiving 61891 citations. The organization is also known as: NIT Allahabad & Motilal Nehru Regional Engineering College.

Effect of calcination temperature on phase transformation, structural and optical properties of sol–gel derived ZrO2 nanostructures

Abstract: Zirconia (ZrO 2 ) nanostructures of various sizes have been synthesized using sol–gel method followed by calcination of the samples from 500 to 700 °C The calcined ZrO 2 powder samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier-transform infra-red spectroscopy (FT-IR), UV–visible spectroscopy (UV–vis), Raman spectroscopy (RS) and thermogravimetric analysis (TGA) The phase transformation from tetragonal (t) to monoclinic (m) was observed The average diameter of the ZrO 2 nanostructures calcined at 500, 600 and 700 °C was calculated to be 8, 17 and 10 nm, respectively The ZrO 2 sample calcined at 500 °C with tetragonal phase shows a direct optical band gap of 51 eV The value of optical band gap is decreased to 43 eV for the ZrO 2 calcined at 600 °C, which contains both tetragonal (73%) and monoclinic (27%) phases On further calcination at 700 °C, where the ZrO 2 nanostructures have 36% tetragonal and 64% monoclinic phases, the optical band gap is calculated to be 48 eV The enhancement in optical band gap for ZrO 2 calcined at 700 °C may be due to the rod like shape of ZrO 2 nanostructures The tetragonal to monoclinic phase transformation was also confirmed by analyzing Raman spectroscopic data The TG analysis revealed that the ZrO 2 nanostructure with dominance of monoclinic phase is found to be more stable over the tetragonal phase In order to confirm the phase stability of the two phases of ZrO 2 , single point energy is calculated corresponding to its monoclinic and tetragonal structures using density functional theory (DFT) calculations The results obtained by theoretical calculations are in good agreement with the experimental findings

Experimental investigation on wire electric discharge machining (WEDM) of Nimonic C-263 superalloy

Abstract: Nimonic C-263 superalloy offers a wide range of outstanding properties, namely, high-temperature resistance, high specific strength, high thermal fatigue, and hot corrosion resistance. The concern ...

Sisal (Agave sisalana) fibre and its polymer-based composites: A review on current developments:

Abstract: Nowadays, it has been global demand to overcome the abundant use of synthetic fibres with respect to save the environment. Sisal fibre is one of the widely used natural fibre and being used as rein...