Electrosynthesis of Cerium Hexaboride Using Lithium Tetra Borate Melt

Amalajyothi, K.; Berchmans, L. John; Visuvasam, A.; Angappan, S.

doi:10.1080/10426910903229388

Cited by 9 publications

(3 citation statements)

References 8 publications

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“…The high-temperature methods (1000–1600 °C) such as solid-state reactions, , melt electrolysis and flux technique, − vapor depositions and metal gas reactions to produce nanostructured hexaborides, − combustion synthesis, the densification process, hot pressing, , spark plasma sintering, pressureless sintering, and sol–gel synthesis − are used to synthesize bulk metal borides. However, very few of those techniques could actually be adopted to nanoscale metal borides.…”

Section: Advances In the Syntheses Of M X B Y Ncsmentioning

confidence: 99%

Metal Borides: From Industrial Classics to Versatile Colloidal Nanocrystals for Energy, Catalysis, and Hard Coatings Applications

Hong,

Mutalik,

Pescarmona

et al. 2024

Chem. Mater.

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Metal boride (M x B y ) nanocrystals (NCs) represent a cutting-edge and promising materials class that has gained significant attention in nanotechnology and materials science. The distinct combination of metal and boron at the nanoscale imparts exceptional mechanical, electronic, and thermal characteristics to these materials, making them highly desirable for various technological applications. M x B y NCs exhibit remarkable hardness, thermal stability, and resistance to wear, rendering them suitable for applications in high-performance materials, coatings, and cutting-edge electronic devices. The nanoscale size of these crystals further enhances their reactivity, properties, and surface area, opening up new possibilities for catalytic processes and energyrelated applications. Researchers are actively exploring various methods of synthesizing these materials, their structural properties, and potential applications, aiming to unlock their full potential for innovations in diverse fields ranging from materials engineering to energy storage. This perspective sets the stage for a deeper exploration into the fascinating world of metal boride NCs and their transformative impact on various technological frontiers.

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Section: Advances In the Syntheses Of M X B Y Ncsmentioning

confidence: 99%

Metal Borides: From Industrial Classics to Versatile Colloidal Nanocrystals for Energy, Catalysis, and Hard Coatings Applications

Hong,

Mutalik,

Pescarmona

et al. 2024

Chem. Mater.

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“…Bluish-violet CeB 6 ranging in size between 4 and 40 µm was produced at 1250 and 1300°C for 2 h through reactions of CeCl 3 with circulating H 2 /Ar gas mixture (after dehydration of CeCl 3 · 7 H 2 O at 100°C for 24 h under a reduced pressure of 10 −3 Pa) or CeF 3 with amorphous or crystalline boron in the presence and absence of Al reducing agent, using conventional apparatus such as graphite crucible or alumina boat placed into a tubular furnace [24,25]. Additionally, electrochemical synthesis (at 900°C) was performed to obtain CeB 6 crystals by using the molten salt technique from the electrolyte consisting of LiCl/Li 2 B 4 O 7 /CeCl 3 [11] and LiF/B 2 O 3 /CeCl 3 [12] raw materials.…”

Section: Introductionmentioning

confidence: 99%

Mechanochemical synthesis and consolidation of nanostructured cerium hexaboride

Ağaoğulları

Balcı

Akçamlı

et al. 2019

PAC

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This study reports on the mechanochemical synthesis (MCS) and consolidation of nanostructured CeB 6 powders of high purity. CeB 6 powders were prepared via MCS by milling CeO 2 , B 2 O 3 and Mg powders in a high-energy ball mill for different milling times. The effects of milling time on the formation, microstructure and thermal behaviour of the synthesized powders were investigated and the optimum MCS duration was determined. Purified powders were obtained after HCl leaching by removing MgO by-product. The prepared powders were characterized by a number of techniques including X-ray diffraction, stereomicroscopy, scanning and transmission electron microscopy coupled with energy dispersive spectrometry, differential scanning calorimetry, atomic absorption spectrometry, particle size analysis, surface area analysis and vibrating sample magnetometry. The high-purity CeB 6 powders having an average particle size of 86 nm were consolidated by cold-pressing followed by pressureless sintering at 1700°C for 5 h. The bulk CeB 6 specimen was investigated for its microstructure, density, electrical resistivity, surface roughness and some mechanical properties (microhardness and wear behaviour). The relative density, electrical resistivity, microhardness and wear rate of the bulk CeB 6 were determined as 95.2% TD, 57.50 µΩ·cm, 11.65 GPa and 1.46 × 10 −4 mm 3 /N·m, respectively.

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“…and chloride/fluoride agents (LiCl, LiF, etc.) (Amalajyothi et al, 2008(Amalajyothi et al, , 2011. For a number of years, researchers have tried to obtain LaB 6 in different forms such as particles, whiskers, rods or cubes using various fabrication techniques.…”

Section: Introductionmentioning

confidence: 99%

Preparation of LaB<sub>6</sub> Powders via Calciothermic Reduction using Mechanochemistry and Acid Leaching

Ağaoğulları

Balcı

Öveçoğlu

et al. 2016

KONA

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This study reports a room temperature mechanochemical route for the synthesis of LaB 6 powders originated from related metal oxide powders as La 2 O 3 and B 2 O 3 . Ca granules and B 2 O 3 powders were respectively used as reducing agent and boron source in the experiments. This study is actually meaningful to create added value by using the native boron source of Turkey for the production of high-technology boron materials. Milling duration as the most important parameter of mechanochemistry was examined to reveal the ideal production conditions. Mechanochemically synthesized powders were subjected to selective HCl leaching in order to eliminate unwanted phases. Thermochemical software of HSC Chemistry TM program was utilized to determine the reaction probability and to estimate the predicted products. Characterization investigations were carried out by X-ray diffractometer (XRD), differential scanning calorimeter (DSC), particle size analyzer (PSA), stereomicroscope (SM), scanning electron microscope (SEM), transmission electron microscope/energy dispersive spectrometer (TEM/EDS) and atomic absorption spectrometer (AAS). Nanosized LaB 6 powders were achieved with/without an insignificant amount of Ca 3 (BO 3 ) 2 phase via mechanochemistry in a high-energy ball mill for 3 h and via leaching with 4 M and 6 M HCl. Lastly, the experimental outputs obtained by a calciothermic reduction were compared with those of magnesiothermic reduction.

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Electrosynthesis of Cerium Hexaboride Using Lithium Tetra Borate Melt

Cited by 9 publications

References 8 publications

Metal Borides: From Industrial Classics to Versatile Colloidal Nanocrystals for Energy, Catalysis, and Hard Coatings Applications

Metal Borides: From Industrial Classics to Versatile Colloidal Nanocrystals for Energy, Catalysis, and Hard Coatings Applications

Mechanochemical synthesis and consolidation of nanostructured cerium hexaboride

Preparation of LaB<sub>6</sub> Powders via Calciothermic Reduction using Mechanochemistry and Acid Leaching

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