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CHUN-LIANG HANG
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Volume 40 Issue 6 October 2017 pp 1241-1245
Melt-assisted synthesis to lanthanum hexaboride nanoparticles and cubes
CHUN-LIANG HANG LI-XIA YANG FENG WANG YAN-BIN XU CHEN-YU YI
Lanthanum hexaboride (LaB$_6$) nanocrystals and cubes were successfully synthesized at 700$^{\circ}$C for 2 h underargon atmosphere by a melt-assisted method using LaCl$_3$ and NaBH$_4$ as reactants, NaCl–KCl or zinc or NaCl–KCl–zincas reaction melt. The obtained products were characterized by X-ray diffraction (XRD), scanning electron microscopy(SEM), transmission electron microscopy (TEM) and Raman spectroscopy. XRD patterns and Raman spectra confirmedthe formation of LaB6 with high purity. TEM and SEM results showed LaB6 powders prepared in mixed molten salts ofNaCl–KCl were mainly composed of nanoparticles with sizes of ca. 8 nm. The morphology of LaB$_6$ presented as regularcubes (100–300 nm) when metal zinc was used as reaction melt. Photothermal conversion test indicated that nanoparticleshad a better photothermal conversion performance than cubes.
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Bulletin of Materials Science
Volume 46, 2023
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