Spark Plasma Sintering of an Infrared‐Transparent Y₂O₃–MgO Nanocomposite

Abstract

A novel optically transparent ceramic nanocomposite Y2O3–MgO was produced using spark plasma sintering technique. Sintering parameters was optimized to obtain fully dense material while maintaining nanoscale grain size. The sintered nanocomposite has an excellent infrared transmission as a result of small grain size and homogeneous microstructure. Postsinter annealing can significantly improve the transmission. Overly larger grain size severely degrades the transmittance.

Hybrid Microwave Sintering of Infrared Transparent Nano‐Y3Al5O12 Synthesized by a Modified Combustion Technique

“…The average grain size of the entire distribution is ~167 nm. The reduction in grain size and pore size minimizes the scattering and improves transmittance properties . The reduced grain size attributes to the fast heating rate and lower soaking duration in hybrid sintering and is a remarkable achievement in the present study, which is highly essential in the fabrication of high‐quality transparent windows.…”

X-ray induced color change on dense yttria samples obtained by spark plasma sintering

“…Aimed at facilitating their loading into the die, the powder was annealed for 30 min in air at 1100 • C in a laboratory Nabertherm N60/ER furnace [29]. It should be noted that sintered samples obtained using as-received commercial powders displayed similar thermoluminescent properties, thus indicating that only a marginal role is played in this regard by the annealing step preceding the consolidation process.…”

Highly transparent lutetium titanium oxide produced by spark plasma sintering

“…15 This kind of FTIR absorption peaks have been reported to be observed in the SPSed ceramics. 16,17 Since SPS uses a graphite die, the sintering atmosphere could contain CO and CO 2 gases. These gases might have been trapped in the specimen due to rapid sintering process of SPS.…”