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Title: Effect of reductant and PVP on morphology and magnetic property of ultrafine Ni powders prepared via hydrothermal route

Abstract

Graphical abstract: The ultrafine Ni powders with the shapes including sphere, pearl-string, leaf, fish-bone, hexagonal sheet and silknet were prepared through one-step hydrothermal reduction using different reductants. Their saturation magnetization, remanent magnetization and coercivity sequentially increase, and the coercivity of hexagonal sheet-like Ni powders increases by 25% compared with the Ni bulk counterpart. - Highlights: • The ultrafine Ni powders with various shapes of sphere, fish-bone, hexagonal sheet, etc. • Facile and one-step hydrothermal reduction using three reductants and PVP additive was developed. • Magnetic properties of the ultrafine Ni powders with different shapes were measured. • Compared with bulk Ni material, coercivity of hexagonal sheet Ni increases by 25%. • The formation mechanism of the shapes was suggested. - Abstract: The ultrafine nickel particles with different shapes including sphere, pearl-string, leaf, fish-bone, hexagonal sheet and silknet were prepared through one-step hydrothermal reduction using hydrazine hydrate, sodium hypophosphite and ethylene glycol as reductants, polyvinylpyrrolidone as structure-directing agent. It has been verified with the characterization of X-ray powder diffraction and transmission/scanning electronic microscopy that as-prepared products belong to face-centered cubic structure of nickel microcrystals with high purity and fine dispersity. The magnetic hysteresis loops measured at room temperature reveal that themore » values of saturation magnetization, remanent magnetization and coercivity rise sequentially from silknet, sphere to hexagonal sheet. In comparison with nickel bulk counterpart, the coercivity of the hexagonal sheet nickel powders increases by 25%.« less

Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
22285154
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 48; Journal Issue: 10; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COERCIVE FORCE; FCC LATTICES; MAGNETIC PROPERTIES; NICKEL; POWDERS; PVP; SHAPE; SHEETS; SKELETON; SODIUM; SYNTHESIS; X-RAY DIFFRACTION

Citation Formats

Zhang, Jun, Wang, Xiucai, Li, Lili, Li, Chengxuan, and Peng, Shuge. Effect of reductant and PVP on morphology and magnetic property of ultrafine Ni powders prepared via hydrothermal route. United States: N. p., 2013. Web. doi:10.1016/J.MATERRESBULL.2013.06.058.
Zhang, Jun, Wang, Xiucai, Li, Lili, Li, Chengxuan, & Peng, Shuge. Effect of reductant and PVP on morphology and magnetic property of ultrafine Ni powders prepared via hydrothermal route. United States. https://doi.org/10.1016/J.MATERRESBULL.2013.06.058
Zhang, Jun, Wang, Xiucai, Li, Lili, Li, Chengxuan, and Peng, Shuge. 2013. "Effect of reductant and PVP on morphology and magnetic property of ultrafine Ni powders prepared via hydrothermal route". United States. https://doi.org/10.1016/J.MATERRESBULL.2013.06.058.
@article{osti_22285154,
title = {Effect of reductant and PVP on morphology and magnetic property of ultrafine Ni powders prepared via hydrothermal route},
author = {Zhang, Jun and Wang, Xiucai and Li, Lili and Li, Chengxuan and Peng, Shuge},
abstractNote = {Graphical abstract: The ultrafine Ni powders with the shapes including sphere, pearl-string, leaf, fish-bone, hexagonal sheet and silknet were prepared through one-step hydrothermal reduction using different reductants. Their saturation magnetization, remanent magnetization and coercivity sequentially increase, and the coercivity of hexagonal sheet-like Ni powders increases by 25% compared with the Ni bulk counterpart. - Highlights: • The ultrafine Ni powders with various shapes of sphere, fish-bone, hexagonal sheet, etc. • Facile and one-step hydrothermal reduction using three reductants and PVP additive was developed. • Magnetic properties of the ultrafine Ni powders with different shapes were measured. • Compared with bulk Ni material, coercivity of hexagonal sheet Ni increases by 25%. • The formation mechanism of the shapes was suggested. - Abstract: The ultrafine nickel particles with different shapes including sphere, pearl-string, leaf, fish-bone, hexagonal sheet and silknet were prepared through one-step hydrothermal reduction using hydrazine hydrate, sodium hypophosphite and ethylene glycol as reductants, polyvinylpyrrolidone as structure-directing agent. It has been verified with the characterization of X-ray powder diffraction and transmission/scanning electronic microscopy that as-prepared products belong to face-centered cubic structure of nickel microcrystals with high purity and fine dispersity. The magnetic hysteresis loops measured at room temperature reveal that the values of saturation magnetization, remanent magnetization and coercivity rise sequentially from silknet, sphere to hexagonal sheet. In comparison with nickel bulk counterpart, the coercivity of the hexagonal sheet nickel powders increases by 25%.},
doi = {10.1016/J.MATERRESBULL.2013.06.058},
url = {https://www.osti.gov/biblio/22285154}, journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 10,
volume = 48,
place = {United States},
year = {Tue Oct 15 00:00:00 EDT 2013},
month = {Tue Oct 15 00:00:00 EDT 2013}
}