The effect of ball milling on properties of sintered manganese-doped alumina
Samo za registrovane korisnike
2019
Autori
Filipović, SuzanaObradović, Nina
Marković, Smilja
Mitrić, Miodrag
Balać, Igor
Đorđević, Antonije
Pavlović, Vladimir
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
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.
Ključne reči:
alumina / ceramics / properties / sinteringIzvor:
Advanced Powder Technology, 2019, 30, 11, 2533-2540Izdavač:
- Elsevier
Finansiranje / projekti:
- Usmerena sinteza, struktura i svojstva multifunkcionalnih materijala (RS-MESTD-Basic Research (BR or ON)-172057)
- Sinteza, razvoj tehnologija dobijanja i primena nanostrukturnih multifunkcionalnih materijala definisanih svojstava (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45019)
Napomena:
- Peer-reviewed manuscript: http://aspace.agrif.bg.ac.rs/handle/123456789/5740
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/S0921883119302596http://dais.sanu.ac.rs/123456789/6951
http://aspace.agrif.bg.ac.rs/handle/123456789/5745
Institucija/grupa
Poljoprivredni fakultetTY - JOUR AU - Filipović, Suzana AU - Obradović, Nina AU - Marković, Smilja AU - Mitrić, Miodrag AU - Balać, Igor AU - Đorđević, Antonije AU - Pavlović, Vladimir PY - 2019 UR - http://www.sciencedirect.com/science/article/pii/S0921883119302596 UR - http://dais.sanu.ac.rs/123456789/6951 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/5745 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 EP - 2540 IS - 11 SP - 2533 VL - 30 DO - 10.1016/j.apt.2019.07.033 ER -
@article{ author = "Filipović, Suzana and Obradović, Nina and Marković, Smilja and Mitrić, Miodrag and Balać, Igor and Đorđević, Antonije and Pavlović, Vladimir", 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 = "2540-2533", number = "11", volume = "30", doi = "10.1016/j.apt.2019.07.033" }
Filipović, S., Obradović, N., Marković, S., Mitrić, M., Balać, I., Đorđević, A.,& Pavlović, V.. (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
Filipović S, Obradović N, Marković S, Mitrić M, Balać I, Đorđević A, Pavlović V. 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 .
Filipović, Suzana, Obradović, Nina, Marković, Smilja, Mitrić, Miodrag, Balać, Igor, Đorđević, Antonije, Pavlović, Vladimir, "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 . .