Characterization of composites containing NiAl2O4 spinel phase from Al2O3/NiO and Al2O3/Ni systems

Justyna Zygmuntowicz , Paulina Wiecińska , Aleksandra Miazga , Katarzyna Konopka

Abstract

This paper focused on the characterization of the composites containing nickel aluminate spinel from Al2O3/NiO and Al2O3/Ni systems. The composites were prepared by die pressing of powders and subsequent sintering of green bodies in air atmosphere. Composites were characterized by XRD, SEM, EDS and DTA/TG/MS analyses. The physical properties of the composites were measured by Archimedes method. Quantitative description of the composites microstructure was made on the basis of SEM images using computer image analysis. The XRD studies and SEM observations of composites confirmed the presence of two phases Al2O3 and NiAl2O4 in the whole volume of samples from both systems. Spinel phase was evenly distributed throughout the volume of the material. Morphology of NiAl2O4 obtained from both systems was characterized by the presence of voids. The DTA/TG/MS measurements showed the characteristics of organic binder decomposition and type of gases released to the atmosphere during thermal treatment. Moreover, the DTA/TG analysis showed the temperature of spinel-phase formation for both systems. It was found that the spinel-phase NiAl2O4 formation retards the process of densification. Therefore, it can be concluded that densification of samples with spinel phase depends mainly on the volume of spinel phase in composite material and does not depend on the substrates used to prepare spinel phase. The values of the selected properties of Al2O3–Ni- and Al2O3–NiO-based materials confirmed that the physical properties depend on the type of substrates used in the fabrication of composites. The type of powder influences the open porosity of samples. For composites produced using NiO powder, open porosity is lower than for samples formed with nickel powder.
Author Justyna Zygmuntowicz ZMCP
Justyna Zygmuntowicz,,
- Division of Ceramic Materials and Polymers
, Paulina Wiecińska KTCh
Paulina Wiecińska,,
- Chair of Chemical Technology
, Aleksandra Miazga ZMCP
Aleksandra Miazga,,
- Division of Ceramic Materials and Polymers
, Katarzyna Konopka ZMCP
Katarzyna Konopka,,
- Division of Ceramic Materials and Polymers
Journal seriesJournal of Thermal Analysis and Calorimetry, ISSN 1388-6150
Issue year2016
Vol125
No3
Pages1079-1086
Publication size in sheets0.5
Keywords in EnglishAl2O3–Ni; Al2O3–NiO; DTA/TG/MS analyses; Spinel-phase NiAl2O4
DOIDOI:10.1007/s10973-016-5357-2
URL http://link.springer.com/article/10.1007/s10973-016-5357-2
Languageen angielski
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Score (nominal)25
ScoreMinisterial score = 20.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 25.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 1.953 (2) - 2016=1.69 (5)
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