Title
Scalable and tunable Y2O3-MgO composite for infrared transparency applications
Author
Kundan Kumar, Hyeon-Myeong Oh, Mi-Ju Kim, Ho Jin Ma, Young-Jo Park, Ha-Neul Kim, Jae-Wook Lee, Jae-Woong Ko
Year
2022
Journal
Journal of the American Ceramic Society
Abstract
The process-structure-property correlationships in yttria-magnesia (YM) composite have been investigated. YM composite was synthesized using commercial powders via ball-milling route with three different grinding balls (Si3N4, Al2O3, ZrO2) having two different sizes (2 and 5 mm diameter). The alteration in grinding ball material and size produces sintered ceramic having different grain sizes (420–560 nm) and degree of phase mixing homogeneity (0.40–0.70). The contamination induced by the milling ball resulted in changes in Y2O3 and MgO defect chemistry, which influenced the grain growth behavior in the YM composite. The hot-pressed composite prepared using 2-mm Si3N4 ball-milled powders exhibited the finest grain size (420 nm) and better phase mixing homogeneity (0.63). The subsequent impact was seen on transmittance efficiency (71%) over the 3–7-μm wavelength range, which is ∼85% of the theoretical limit. The findings show that the selection of the right size and type of grinding ball for milling commercial powder is a simple and cost-effective way for scalable production of YM composite with high transmittance efficiency for infrared windows and dome applications.
Instrument
FT/IR-6300
Keywords
yttria-magnesia, YM,