Effect of TiO₂ and MgO on Microstructure of α-Alumina Ceramics and its Sintering Behavior

Abstract:

Observation on the effect of adding titanium oxide (TiO₂) and magnesium oxide (MgO) on the sintering of α-alumina (Al₂O₃) has been performed. In this study, technical alumina used as basic material in which the sample is formed by the pressureless sintering/cold press and sintered at 1500°C which is lower than alumina sintering temperature at 1700°C. Elemental analysis, observation of microstructure, hardness, fracture toughness and density measurements were carried out to determine the physical and mechanical properties of alumina. The results indicate a change in the microstructure where the content of the platelet structure are much more than the equilateral structure. At sintering temperature of 1500°C, neck growth occurs at ceramics grain, supported by the results of the density test which indicate perfect compaction has occurred in this process.

• Periodical: Advanced Materials Research (Volume 1112)
• Pages: 519-523
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1112.519
• Online since: July 2015
• Authors: Jarot Raharjo*, Sri Rahayu, Tika Mustika, Masmui Masmui, Dwi Budiyanto
• Keywords: Alumina, Magnesium Oxide, Platelet, Titanium Oxide

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