Development of synthesis and granulation process of MgAl2O4 powder for the fabrication of transparent ceramic

• Published in: Optical materials Vol. 98; p. 109440
• Main Authors: Alhaji, A., Taherian, M.H., Ghorbani, S., Sharifnia, S.A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-12-2019
• Subjects: Light transmittance and spray drying method; MgAl2O4; Spark plasma sintering (SPS); MgAl2O4; Light transmittance and spray drying method; Spark plasma sintering (SPS)
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2019.109440

In this study, transparent MgAl2O4 was obtained using spark plasma sintering (SPS) technique. The primary powder was synthesized via a solid-state method. The synthesized process was optimized with 1 wt% LiF and heat treatment temperature of 1400 °C for 2 h. The resulting powder had the average grain size range of 200–400 nm. The granulation parameters include the different solid contents (30, 35, 40, 45, 50, and 55 wt%) and PVA contents (0.1, 0.2, 0.3 and 0.4 wt%) were investigated. The balanced solid and PVA contents were 55 wt% and 0.1 wt%, respectively. Furthermore, the effect of granulation of MgAl2O4 powder on the optical transparency was evaluated. The samples prepared by granulation process had a maximum light transmittance (80%) at the wavelength of 2.5–5 μm and 60–80% at the wavelength of 400–800 nm.
•Synthesis of MgAl2O4 composite powders via solid state method.•Optimization of granulation parameters in the solid content of 50 wt % and the binder (PVA) content of 0.1 wt %.•Improving the transmittance of spinel to the 10% in the visible and 12% in the IR region by granulation process. .