A facile synthesis of SmCo5 magnets from core/shell Co/Sm 2O3 nanoparticles

By Yanglong Hou; Zhichuan Xu; Sheng Peng; Chuanbing Rong; J. Ping Liu; Shouheng Sun

doi:10.1002/adma.200700891

A facile synthesis of SmCo₅ magnets from core/shell Co/Sm ₂O₃ nanoparticles

By Yanglong Hou^*, Zhichuan Xu, Sheng Peng, Chuanbing Rong, J. Ping Liu, Shouheng Sun

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

165 Citations (Scopus)

Abstract

A facile synthesis of SmCo₅ magnets was investigated using the high-temperature reductive annealing of core/shell-structured Co/Sm ₂O₃ nanoparticles. The magnets have the ability to adopt a hcp structure with a coercivity value of 24 kOe at 100 K and 8 kOe at room temperature. The core/shell particles are reductively annealed in the presence of Ca at 900°C to reduce Sm₂O₃ to Sm and enhance interface diffusion between Co and Sm. Energy dispersive spectroscopy (EDS) and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) were employed to determine the composition of the particles. X-ray diffraction (XRD) was also used to characterize the structure of the particles. Results show that synthesis can be effective for fabricating air-stable SmCo-based nanoparticles and nanocomposite magnets.

Original language	English
Pages (from-to)	3349-3352
Number of pages	4
Journal	Advanced Materials
Volume	19
Issue number	20
DOIs	https://doi.org/10.1002/adma.200700891
Publication status	Published - Oct 19 2007
Externally published	Yes

ASJC Scopus Subject Areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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title = "A facile synthesis of SmCo5 magnets from core/shell Co/Sm 2O3 nanoparticles",

abstract = "A facile synthesis of SmCo5 magnets was investigated using the high-temperature reductive annealing of core/shell-structured Co/Sm 2O3 nanoparticles. The magnets have the ability to adopt a hcp structure with a coercivity value of 24 kOe at 100 K and 8 kOe at room temperature. The core/shell particles are reductively annealed in the presence of Ca at 900°C to reduce Sm2O3 to Sm and enhance interface diffusion between Co and Sm. Energy dispersive spectroscopy (EDS) and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) were employed to determine the composition of the particles. X-ray diffraction (XRD) was also used to characterize the structure of the particles. Results show that synthesis can be effective for fabricating air-stable SmCo-based nanoparticles and nanocomposite magnets.",

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AU - Hou, By Yanglong

AU - Xu, Zhichuan

AU - Peng, Sheng

AU - Rong, Chuanbing

AU - Liu, J. Ping

AU - Sun, Shouheng

PY - 2007/10/19

Y1 - 2007/10/19

N2 - A facile synthesis of SmCo5 magnets was investigated using the high-temperature reductive annealing of core/shell-structured Co/Sm 2O3 nanoparticles. The magnets have the ability to adopt a hcp structure with a coercivity value of 24 kOe at 100 K and 8 kOe at room temperature. The core/shell particles are reductively annealed in the presence of Ca at 900°C to reduce Sm2O3 to Sm and enhance interface diffusion between Co and Sm. Energy dispersive spectroscopy (EDS) and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) were employed to determine the composition of the particles. X-ray diffraction (XRD) was also used to characterize the structure of the particles. Results show that synthesis can be effective for fabricating air-stable SmCo-based nanoparticles and nanocomposite magnets.

AB - A facile synthesis of SmCo5 magnets was investigated using the high-temperature reductive annealing of core/shell-structured Co/Sm 2O3 nanoparticles. The magnets have the ability to adopt a hcp structure with a coercivity value of 24 kOe at 100 K and 8 kOe at room temperature. The core/shell particles are reductively annealed in the presence of Ca at 900°C to reduce Sm2O3 to Sm and enhance interface diffusion between Co and Sm. Energy dispersive spectroscopy (EDS) and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) were employed to determine the composition of the particles. X-ray diffraction (XRD) was also used to characterize the structure of the particles. Results show that synthesis can be effective for fabricating air-stable SmCo-based nanoparticles and nanocomposite magnets.

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A facile synthesis of SmCo₅ magnets from core/shell Co/Sm ₂O₃ nanoparticles

Abstract

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