Synthesis of bulk nanocrystalline samarium hexaboride

Duygu Ağaoğullari*, Özge Balci, M. Lütfi Öveçoğlu, C. Suryanarayana, Ismail Duman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

This study reports on the preparation and consolidation of nano-sized SmB6 powders via mechanochemical synthesis (MCS) performed at room-temperature using Sm2O3-B2O3-Mg powder blends followed by cold pressing/pressureless sintering. Milling duration was used as an MCS parameter to reveal the optimum production conditions of nanoscale SmB6 powders, which were subsequently subjected to HCl leaching to remove the intermediate products. Microstructural, physical and magnetic properties of the SmB6 powders were evaluated using 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), atomic absorption spectrometer (AAS), surface area analyzer (SAA) and vibrating sample magnetometer (VSM). The bulk properties of the SmB6 sintered from nanocrystalline SmB6 powders with an average particle size of ~80nm and a minimum purity of 99.99% were described in terms of their microstructure, density, electrical resistivity, surface roughness, friction coefficient, hardness and wear rate.

Original languageEnglish
Pages (from-to)4121-4136
Number of pages16
JournalJournal of the European Ceramic Society
Volume35
Issue number15
DOIs
Publication statusPublished - 1 Dec 2015

Bibliographical note

Publisher Copyright:
© 2015 Elsevier Ltd.

Funding

This study was supported by “The Scientific and Technological Research Council of Turkey (TÜBİTAK)” with the project title of “Synthesis of Lanthanum, Cerium and Samarium Borides by Solid-State Reaction at Room Temperature” and with the project number of 109M364. It was also funded by “Istanbul Technical University Scientific Research Projects” with the project title of “Mechanochemical Synthesis and Characterization of Some Rare-Earth Metal Borides” and with the project number of 33549. The authors would like to thank Prof. Dr. Hüseyin Çimenoğlu and Prof. Dr. Cüneyt Arslan for their supports in mechanical tests and XRD analysis, respectively. Further, the authors wish to express their appreciations to Prof. Dr. Orhan Kamer for his help in magnetic and electrical measurements.

FundersFunder number
TÜBİTAK109M364
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu
Istanbul Teknik Üniversitesi33549

    Keywords

    • Cold pressing/pressureless sintering
    • Mechanical properties
    • Mechanochemical synthesis
    • Microstructural properties
    • Samarium hexaboride

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