The effect of ball milling on properties of sintered manganese-doped alumina
Authorized Users Only
2019
Authors
Filipović, Suzana
Obradović, Nina

Marković, Smilja

Mitrić, Miodrag

Balać, Igor
Đorđević, Antonije

Pavlović, Vladimir B.

Article (Published version)

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Alumina-based compounds have many technological applications and attract great attention even after decades of investigation, due to their good chemical, electrical, and mechanical properties. A mixture of several alumina modifications (α-, κ-, γ-Al2O3) doped with 1 wt% of Mn2O3 was used for this experiment. The powder was mechanically activated for 60 min in an ethanol medium. After compaction, green bodies were sintered in the temperature range from 1200 to 1400 °C. Microstructures of the obtained specimens were investigated by scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The influence of morphological changes on electrical and mechanical properties was examined in detail. We have developed a test fixture and corresponding software for measurement of the relative dielectric permittivity and the loss tangent of ceramic specimens. This new method overcomes the problems of dimensions and shape of samples, as well as the problem of applying silver pa...ste. The accuracy is around 2% for ε'r and 0.003 for tanδ. We demonstrate that the mechanical activation (MA) has the dominant influence on lowering the characteristic temperatures and microstructure development, which further leads to increased permittivity and tensile strength.
Keywords:
alumina / ceramics / properties / sinteringSource:
Advanced Powder Technology, 2019, 30, 11, 2533-2540Publisher:
- Elsevier
Funding / projects:
- Directed synthesis, structure and properties of multifunctional materials (RS-172057)
- Synthesis, processing and applications of nanostructured multifunctional materials with defined properties (RS-45019)
Note:
- Peer-reviewed manuscript: https://hdl.handle.net/21.15107/rcub_dais_7027
Related info:
DOI: 10.1016/j.apt.2019.07.033
ISSN: 0921-8831
WoS: 000490130200009
Scopus: 2-s2.0-85070548925
URI
http://www.sciencedirect.com/science/article/pii/S0921883119302596https://dais.sanu.ac.rs/123456789/6951
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Filipović, Suzana AU - Obradović, Nina AU - Marković, Smilja AU - Mitrić, Miodrag AU - Balać, Igor AU - Đorđević, Antonije AU - Pavlović, Vladimir B. PY - 2019 UR - http://www.sciencedirect.com/science/article/pii/S0921883119302596 UR - https://dais.sanu.ac.rs/123456789/6951 AB - Alumina-based compounds have many technological applications and attract great attention even after decades of investigation, due to their good chemical, electrical, and mechanical properties. A mixture of several alumina modifications (α-, κ-, γ-Al2O3) doped with 1 wt% of Mn2O3 was used for this experiment. The powder was mechanically activated for 60 min in an ethanol medium. After compaction, green bodies were sintered in the temperature range from 1200 to 1400 °C. Microstructures of the obtained specimens were investigated by scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The influence of morphological changes on electrical and mechanical properties was examined in detail. We have developed a test fixture and corresponding software for measurement of the relative dielectric permittivity and the loss tangent of ceramic specimens. This new method overcomes the problems of dimensions and shape of samples, as well as the problem of applying silver paste. The accuracy is around 2% for ε'r and 0.003 for tanδ. We demonstrate that the mechanical activation (MA) has the dominant influence on lowering the characteristic temperatures and microstructure development, which further leads to increased permittivity and tensile strength. PB - Elsevier T2 - Advanced Powder Technology T1 - The effect of ball milling on properties of sintered manganese-doped alumina SP - 2533 EP - 2540 VL - 30 IS - 11 DO - 10.1016/j.apt.2019.07.033 UR - https://hdl.handle.net/21.15107/rcub_dais_6951 ER -
@article{ author = "Filipović, Suzana and Obradović, Nina and Marković, Smilja and Mitrić, Miodrag and Balać, Igor and Đorđević, Antonije and Pavlović, Vladimir B.", year = "2019", abstract = "Alumina-based compounds have many technological applications and attract great attention even after decades of investigation, due to their good chemical, electrical, and mechanical properties. A mixture of several alumina modifications (α-, κ-, γ-Al2O3) doped with 1 wt% of Mn2O3 was used for this experiment. The powder was mechanically activated for 60 min in an ethanol medium. After compaction, green bodies were sintered in the temperature range from 1200 to 1400 °C. Microstructures of the obtained specimens were investigated by scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The influence of morphological changes on electrical and mechanical properties was examined in detail. We have developed a test fixture and corresponding software for measurement of the relative dielectric permittivity and the loss tangent of ceramic specimens. This new method overcomes the problems of dimensions and shape of samples, as well as the problem of applying silver paste. The accuracy is around 2% for ε'r and 0.003 for tanδ. We demonstrate that the mechanical activation (MA) has the dominant influence on lowering the characteristic temperatures and microstructure development, which further leads to increased permittivity and tensile strength.", publisher = "Elsevier", journal = "Advanced Powder Technology", title = "The effect of ball milling on properties of sintered manganese-doped alumina", pages = "2533-2540", volume = "30", number = "11", doi = "10.1016/j.apt.2019.07.033", url = "https://hdl.handle.net/21.15107/rcub_dais_6951" }
Filipović, S., Obradović, N., Marković, S., Mitrić, M., Balać, I., Đorđević, A.,& Pavlović, V. B.. (2019). The effect of ball milling on properties of sintered manganese-doped alumina. in Advanced Powder Technology Elsevier., 30(11), 2533-2540. https://doi.org/10.1016/j.apt.2019.07.033 https://hdl.handle.net/21.15107/rcub_dais_6951
Filipović S, Obradović N, Marković S, Mitrić M, Balać I, Đorđević A, Pavlović VB. The effect of ball milling on properties of sintered manganese-doped alumina. in Advanced Powder Technology. 2019;30(11):2533-2540. doi:10.1016/j.apt.2019.07.033 https://hdl.handle.net/21.15107/rcub_dais_6951 .
Filipović, Suzana, Obradović, Nina, Marković, Smilja, Mitrić, Miodrag, Balać, Igor, Đorđević, Antonije, Pavlović, Vladimir B., "The effect of ball milling on properties of sintered manganese-doped alumina" in Advanced Powder Technology, 30, no. 11 (2019):2533-2540, https://doi.org/10.1016/j.apt.2019.07.033 ., https://hdl.handle.net/21.15107/rcub_dais_6951 .