TY - JOUR
T1 - Synthesis of cobalt boride nanoparticles using RF thermal plasma
AU - Choi, Sooseok
AU - Lapitan, Lorico D.S.
AU - Cheng, Yingying
AU - Watanabe, Takayuki
N1 - Funding Information:
The authors acknowledge the Japan Society for the Promotion of Science (JSPS) for the visiting fellowship grant of Mr. Lapitan under the 2011 Invitation Program for Young East Asian Researchers . The Tokyo Institute of Technology based researchers acknowledge the support of this work by the Information Center of Particle Technology, Japan for the research grant of T. Watanabe.
PY - 2014/1
Y1 - 2014/1
N2 - Nanosize cobalt boride particles were synthesized from the vapor phase using a 30 kW-4 MHz radio frequency (RF) thermal plasma. Cobalt and boron powder mixtures used as precursors in different composition and feed rate were evaporated immediately in the high temperature plasma and cobalt boride nanoparticles were produced through the quenching process. The X-ray diffractometry (XRD) patterns of cobalt boride nanoparticles prepared from the feed powder ratio of 1:2 and 1:3 for Co:B showed peaks that are associated with the Co2B and CoB crystal phases of cobalt boride. The XRD analysis revealed that increasing the powder feed rate results in a higher mass fraction and a larger crystalline diameter of cobalt boride nanoparticles. The images obtained by field emission scanning electron microscopy (FE-SEM) revealed that cobalt boride nanoparticles have a spherical morphology. The crystallite size of the particles estimated with XRD was found to be 18-22 nm.
AB - Nanosize cobalt boride particles were synthesized from the vapor phase using a 30 kW-4 MHz radio frequency (RF) thermal plasma. Cobalt and boron powder mixtures used as precursors in different composition and feed rate were evaporated immediately in the high temperature plasma and cobalt boride nanoparticles were produced through the quenching process. The X-ray diffractometry (XRD) patterns of cobalt boride nanoparticles prepared from the feed powder ratio of 1:2 and 1:3 for Co:B showed peaks that are associated with the Co2B and CoB crystal phases of cobalt boride. The XRD analysis revealed that increasing the powder feed rate results in a higher mass fraction and a larger crystalline diameter of cobalt boride nanoparticles. The images obtained by field emission scanning electron microscopy (FE-SEM) revealed that cobalt boride nanoparticles have a spherical morphology. The crystallite size of the particles estimated with XRD was found to be 18-22 nm.
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U2 - 10.1016/j.apt.2013.06.002
DO - 10.1016/j.apt.2013.06.002
M3 - Article
AN - SCOPUS:84896389374
VL - 25
SP - 365
EP - 371
JO - Advanced Powder Technology
JF - Advanced Powder Technology
SN - 0921-8831
IS - 1
ER -