Articles written in Bulletin of Materials Science
Volume 10 Issue 5 August 1988 pp 435-442
Separation characteristics of different size and density fractions in batch coal flotation
M Vanangamudi C Vinod Kumar T C Rao
Batch flotation experiments were carried out using two coal samples to study the behaviour of each size and the density fractions in coal flotation. Different size fractions obtained from sizing of concentrates and tailing were subjected to float and sink analysis using organic liquids. The distribution curve technique was adopted to evaluate the performance of flotation. The results show that selectivity of flotation decreases with decrease in particle size. The specific gravity of separation is influenced more by the level of the frother dosage than by the collector dosage. The specific gravity of separation increases with increase in flotation time. The maximum value attained at infinite flotation time increases with decrease in particle size but the rate at which it is reached decreases.
Volume 20 Issue 3 June 1997 pp 305-315
Mixed conduction in charge transfer materials based on aromatic diamines and iodine having different mole ratios
Ram Adhar Singh Vinod Kumar Singh
Mixed ionic and electronic conduction in charge transfer materials based on aromatic diamine electron donors (benzidine,
Volume 37 Issue 3 May 2014 pp 655-660
Hydrogen absorption/desorption characteristics of room temperature ZrMn2-𝑥Ni𝑥 system (𝑥 = 1.25-1.50)
Vinod Kumar D Pukazhselvan A K Tyagi S K Singh
The present communication deals with the hydrogen storage characteristics of C15 laves phase ZrMn2-𝑥Ni𝑥 system tailored within the x values of 1.25 to 1.50. Drastic variations in thermodynamics of the hydride phase is observed for any little changes of concentration x within this narrow range. The most promising room temperature hydrogen storage materials are found to be formed within the range of 1.35 to 1.45 where ∼ 2.5 to 2.9 H/F.U. can be reversibly stored under the ideal operating conditions. The heat of the reaction is found to be ∼ 17 kJ/mol, which means these are promising candidates for stationary and short range mobile applications. The phase structural features and the thermodynamic aspects of all the materials are discussed in detail.
Volume 45 All articles Published: 30 August 2022 Article ID 0169
Facile synthesis of Zn/Cu and PANI modified layered double hydroxides with insights into structural memory effect property
BHAMINI PANDEY POONAM SINGH VINOD KUMAR
The present study reports the successful synthesis of Zn/Cu layered double hydroxides (LDHs) by a simple hydrolysis route and detailed characterization using a wide variety of techniques, i.e., PXRD, FTIR, TGA, ICP-MS and SEM/EDX. The study proposes a facile and cost-effective method for exchanging the interlayer anion with the conducting polymeric anion (PANI) that results in a material with enhanced thermal, optical and electrical properties, which may be of interest in a variety of applications. The morphology, thermal stability and interactions of PANI-modified Zn/Cu LDH were compared with pristine LDH. In addition, the structural memory effect property of Zn/Cu lattice was examined, where after rehydration the calcined sample of as-synthesized LDH was successfully reformed into layered structure with good crystallinity.
Volume 46, 2023
Continuous Article Publishing mode
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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