Ravi Kumar

ORCID: 0000-0001-6856-6092
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About
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Research Areas
  • Advanced ceramic materials synthesis
  • Advanced materials and composites
  • Metal and Thin Film Mechanics
  • Ferroelectric and Piezoelectric Materials
  • MXene and MAX Phase Materials
  • Aluminum Alloys Composites Properties
  • Semiconductor materials and devices
  • Electrocatalysts for Energy Conversion
  • Diamond and Carbon-based Materials Research
  • Magnetic Properties and Synthesis of Ferrites
  • Advanced Photocatalysis Techniques
  • Microwave Dielectric Ceramics Synthesis
  • Copper-based nanomaterials and applications
  • Metal Forming Simulation Techniques
  • Catalytic Processes in Materials Science
  • Nanoparticles: synthesis and applications
  • Thermal Expansion and Ionic Conductivity
  • High-Temperature Coating Behaviors
  • Dielectric materials and actuators
  • Advancements in Battery Materials
  • Magnesium Oxide Properties and Applications
  • Semiconductor materials and interfaces
  • Electronic and Structural Properties of Oxides
  • Aluminum Alloy Microstructure Properties
  • High Entropy Alloys Studies

Indian Institute of Technology Madras
2016-2025

Career Point University
2023-2024

Netaji Subhas University of Technology
2019-2024

National University of Science and Technology
2022

University of Florida
2022

National Institute of Technology Patna
2019-2022

University of Delhi
2022

National Institute of Technology Hamirpur
2011-2018

University of Cambridge
2005-2017

Indian Institute of Technology Dhanbad
2017

Abstract Nanometric powder particles of white zirconia were synthesized through precursor route by the pyrolysis zirconium (IV) butoxide at varied temperatures in air ranging from 900–1400 °C and predominantly monoclinic nature. To control defect chemistry, was also pyrolyzed a reduced atmosphere 900 °C, eventually resulting black zirconia. The stabilization tetragonal phase observed color change to samples under attributed creation oxygen vacancies disorder. produced delineated influence...

10.1038/s41598-018-23648-0 article EN cc-by Scientific Reports 2018-03-29

Abstract To advance the MXene field, it is crucial to optimize each step of synthesis process and create a detailed, systematic guide for synthesizing high‐quality that can be consistently reproduced. In this study, detailed provided an optimized titanium carbide (Ti 3 C 2 T x ) using mixture hydrofluoric hydrochloric acids selective etching stoichimetric‐Ti AlC MAX phase delamination etched multilayered Ti lithium chloride at 65 °C 1 h with argon bubbling. The effect different variables...

10.1002/smtd.202300030 article EN cc-by Small Methods 2023-05-07

We report the unique actuation characteristics of moisture-driven, fully reversible soft biopolymer films fabricated from Bombyx mori silk. The instantaneous is driven by water vapor induced stress gradient generated across thickness film, and it possesses subsecond response times. excellent durability consistent performance film without any noticeable fatigue are established subjecting to more than a thousand continuous cycles. weight-lifting capability fascinating, where few tens...

10.1021/acsami.0c17525 article EN ACS Applied Materials & Interfaces 2021-02-12

Abstract In this work, nanocomposites made of nanosized zirconia crystallized in situ an amorphous silicon oxycarbo(nitride) (SiOC(N)) matrix have been designed through a precursor route for visible light photocatalytic applications. The relative volume fraction the starting precursors and pyrolysis temperatures not only influences phase crystallites but also stabilizes tetragonal crystal structure ( t -ZrO 2 ) at room temperature. presence carbon interstitial sites oxygen vacancy defects...

10.1038/s41598-019-57394-8 article EN cc-by Scientific Reports 2020-01-16

This research intends to formulate Ocimum sanctum mediated pure and transition metal (Co2+/ Cu2+/ Zn2+) doped magnesium oxide nanoparticles (MgO NPs). The cubic structure of so synthesized MgO NPs was confirmed by XRD analysis. As per UV-visible spectral analysis, band gap (Eg) is tuned upon doping; doping with Co, Cu Zn, their respective Eg are 1.65 eV, 1.96 eV 3.66 in relation MgO, = 3.50 eV. average particle size decreased from 17 nm for 8–13 NPs, based on TEM EDX XPS analysis verified...

10.1016/j.hybadv.2024.100199 article EN cc-by-nc Hybrid Advances 2024-04-20

Abstract In this work, we report the thermodynamic modeling of Ta–N–O system using Calphad approach combined with ab initio calculations and experiments. The formation enthalpies stable certain metastable compounds Ta–N systems were computed density functional theory (DFT) to serve as inputs for Gibbs energy modeling. DFT study has confirmed an equilibrium phase. Hence, phase is included a in system. Wherever feasible, have performed phonon estimate heat capacities compounds. TaON measured...

10.1111/jace.20521 article EN Journal of the American Ceramic Society 2025-03-29

The crystallization kinetics of [(Fe0.5Co0.5)0.75B0.2Si0.05]96Nb4 and {[(Fe0.5Co0.5)0.75B0.2Si0.05]0.96Nb0.04}99.5Cu0.5 bulk metallic glasses were evaluated using differential scanning calorimetry under non-isothermal condition. fully glassy rods with diameters up to 2 mm obtained by copper mold injection casting. Both show good thermal stability, but the addition only 0.5% Cu completely changes behavior. average activation energy required for decreases from 645 kJ/mol 425 after addition....

10.1063/1.4942179 article EN Journal of Applied Physics 2016-02-19

In this current investigation, we elucidated the microwave-assisted green synthesis of 90:10, 80:20, and 70:30 CuO–Co3O4 nanocomposites (NCs) from Ipomoea carnea leaf extract, manifesting their remarkable antibacterial, photocatalytic, antioxidant capabilities. The spectroscopic techniques XRD, SEM, EDX, TEM, FTIR, UV–visible spectroscopy were employed to validate formation synthesized NCs. SEM TEM images revealed distinctive snowball-rod distorted spherical structures in nanocomposites,...

10.1016/j.hybadv.2023.100129 article EN cc-by-nc-nd Hybrid Advances 2023-12-13
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