Spark plasma sintering of highly magnetic Fe3O4 and CoFe2O4 ceramics from hollow spheres synthesized by thermal plasma spraying; Materials Characterization; Vol. 230, Pt. A

Spark plasma sintering of highly magnetic Fe3O4 and CoFe2O4 ceramics from hollow spheres synthesized by thermal plasma spraying; Materials Characterization; Vol. 230, Pt. A

Bibliographic Details
Parent link:Materials Characterization.— .— Amsterdam: Elsevier Science Publishing Company Inc.
Vol. 230, Pt. A.— 2025.— Article number 115744, 13 p.
Other Authors: Shanenkov I. I. Ivan Igorevich, Tsimmerman (Cimmerman) A. I. Aleksandr Igorevich, Nassyrbayev (Nasyrbaev) A. Artur, Nikitin D. S. Dmitry Sergeevich, Ivashutenko A. S. Alexander Sergeevich, Zhumabaev I. Iskander, Shanenkova Yu. L. Yuliya Leonidovna, Sivkov A. A. Aleksandr Anatolyevich, Li Junzhi, Han Wei
Summary:Title screen
Developing methods for producing magnetite (Fe3O4), particularly in the form of hollow spherical particles exhibiting improved magnetic properties, is an urgent issue. Despite known approaches for forming such dispersed products, recrystallization and phase transformations during the sintering of the bulk Fe3O4-based products result in a loss of magnetic characteristics and a decrease in the final functional properties. In this study, we propose a joint approach to obtain highly magnetic hollow Fe3O4 spherical particles by thermal plasma spraying combined with subsequent ceramics production by the spark plasma sintering (SPS) method. Detailed studies of the plasma dynamic synthesis process as a method for producing Fe3O4 hollow spheres and its features made it possible to reveal the parameters for obtaining highly magnetic powders with saturation magnetization of Ms = 99 emu/g. Such magnetic characteristics were found to preserve in a bulk sample at decreased SPS parameters that negatively affect the final density. These drawbacks can be overcome by introducing cobalt into the arc discharge plasma at the stage of Fe3O4 synthesis that results in the formation of cobalt ferrite CoFe2O4. Such process modification provides not only the powder with high Ms values (101.0 emu/g) but also ceramic samples with Ms values (71.0 emu/g) close to the best known for CoFe2O4 ceramics. The discovered features demonstrate broad prospects for further development of proposed approach for obtaining simple and multicomponent materials based on iron oxides with improved magnetic properties
Текстовый файл
AM_Agreement
Language:English
Published: 2025
Subjects:
Thermal plasma spraying, magnetite
Cobalt ferrite
Spark plasma sintering
Magnetic ceramics
электронный ресурс
труды учёных ТПУ
Online Access:https://doi.org/10.1016/j.matchar.2025.115744
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=684682

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