NS Gajbhiye

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Progress in Crystal Growth and Characterization of Materials

Volume 52, Issues 1–2, March–June 2006, Pages 132-141

Synthesis and structural investigation of ɛ-Fe3−xNixN (0.0 ≤ x ≤ 0.8) nanoparticles

Author links open overlay panelN.S.GajbhiyeabSayanBhattacharyyaa

https://doi.org/10.1016/j.pcrysgrow.2006.03.018

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Abstract

ɛ-Fe3−xNixN (0.0 ≤ x ≤ 0.8) system is synthesized by precursor technique and nitridation of the Fe–Ni-oxide nanoparticles in NH3 (g). For x = 0.0–0.4, single phase ɛ-Fe3N hexagonal structure with space group P63/mmc is obtained, while for x = 0.5–0.8, a mixture of hexagonal ɛ-Fe3−xNixN and fcc γ′-Fe4−yNiyN phases are observed. Rietveld analysis is shown for the representative ɛ-Fe2.6Ni0.4N and ɛ-Fe2.2Ni0.8N compositions and it is observed that Ni substitutes the Fe atoms randomly and the metal atoms occupy [1/3, 2/3, 1/4] and [2/3, 1/3, 3/4] positions while the N atoms occupy [0, 0, 0] and [1/3, 2/3, 1/2] positions. Electron microscopy and atomic force microscopy confirm the nanostructured and spherical/platelet nature of the particles.

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Keywords

NanocrystallineNitrideCitrate precursorXRD-RietveldMorphology

N.S. Gajbhiye was born on May 10, 1952 in Akot, Bhandara District, Maharashtra, India. He obtained his B.Sc. (1973) and M.Sc. (1975) degrees from Nagpur University. After his Ph.D. degree from the Indian Institute of Science, Bangalore, India, in 1981, he joined as the faculty at the Indian Institute of Technology, Kanpur, India. Currently, he is a Professor of Chemistry and published more than 100 papers in National and International Journals, in the research area of Solid State Chemistry and Functional Nanostructure Materials. His research interests include advanced materials e.g. electroceramic materials (PTC thermistors, PZT, TiO2, ZrO2), hydrogels, Magnetic nanoparticles e.g. ferrites, binary/ternary transition metal nitrides, ferrofluids, superconductors, self-assembled monodispersed magnetic and noble metal (core-shell) nanoparticles and applications to forensic, nanocatalysis and nanoelectronic systems.

Dr. Gajbhiye is a Fellow of the National Academy of Sciences, Allahabad, Fellow of the World Innovation Foundation, U.K., DAAD Fellow: German Academy of Sciences. He is a member of the International Advisory Board for Mössbauer Research & Data Journal, USA, Member of the International Editorial Board, Journal of Nanotechnology and Applications, RIP-Delhi. He is life member of various organizations: Indian Thermal Analysis Society, Materials Society of India, Indian Association of Solid State Chemists and Allied Scientists, Indian Institute of Metals and Indian Council of Chemists.

Dr. Gajbhiye is a guest Professor at the Institute of Nanotechnology, Karlsruhe and at the DFG-Center for Functional Nanostructures, Karlsruhe (TU). Also, he is on the Board of referee for Journals: J. Mater. Sci., J. Solid State Chem., Ind. J. Chem., Mater. Res. Bull., Hyper. Interact., Phys. Stat. Sol. etc.

Sayan Bhattacharyya was born on January 10, 1975 in Kolkata, West Bengal, India. He received his B.Sc. and M.Sc. degrees from Calcutta University, Kolkata and Kalyani University, West Bengal in 1996 and 1998, respectively.

In 1999, he joined the Department of Chemistry, Indian Institute of Technology, Kanpur, India, where he was pursuing the Ph.D. degree as well as working on the electronic and magnetic properties of binary, pseudo-binary and ternary nanocomposite metal nitrides. He received his Ph.D. degree in 2006.