Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11779/2399
Title: Mechanochemical Synthesis and Characterization of Nanostructured Erb<sub>4</Sub> and Ndb<sub>4</Sub> Rare-Earth Tetraborides
Authors: Boztemur, Burcak
Kaya, Faruk
Derin, Bora
Ovecoglu, Mustafa Lutfi
Li, Ju
Agaogullari, Duygu
Keywords: Magnetic properties
Mechanical alloying
Mechanochemical syntheses
Rare-earth tetraborides
Publisher: Wiley-v C H verlag Gmbh
Abstract: Rare-earth borides have become very popular in recent decades with high mechanical strength, melting point, good corrosion, wear, and magnetic behavior. However, the production of these borides is very challenging and unique. The production of ErB4 and NdB4 nanopowders via mechanochemical synthesis (MCS) is reported in this study first time in the literature. Er2O3 or Nd2O3, B2O3, and Mg initial powders are mechanically alloyed for different milling times to optimize the process. Rare-earth borides with MgO phases are synthesized, then MgO is removed with HCl acid. The nanostructured rare-earth tetraboride powders are analyzed using X-ray diffraction (XRD). Based on the XRD, ErB4 powders are produced successfully at the end of the 5 h milling. However, the NdB4 phase does not occur as the stoichiometric ratio, so the B2O3 amount is decreased to nearly 35 wt%. When the amount of B2O3 is decreased to 20 wt%, NdB4 and NdB6 phases are 50:50 according to the Rietveld analysis. However, a homogenous NdB4 phase is obtained with 30 wt% loss of B2O3. The average particle sizes of ErB4 and NdB4 powders are nearly 100.4 and 85.6 nm, respectively. The rare-earth tetraborides exhibit antiferromagnetic-to-paramagnetic-like phase transitions at 18 and 8.53 K, respectively.
Description: BOZTEMUR, BURCAK/0000-0002-1878-9826
URI: https://doi.org/10.1002/adem.202400842
https://hdl.handle.net/20.500.11779/2399
ISSN: 1438-1656
1527-2648
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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