Amorphization by Mechanical Milling for Making IR Transparent Glass‐Ceramics

Abstract

International audienceno abstrac

New synthesis route for glasses and glass-ceramics in the Ga2S3Na2S binary system

“…Palazzi used the melt quenching technique in a vitreous carbon nacelle with GaOOH and Na2CO3 as starting materials, under a H2S flow 24 . The incorporation of twice as much Na + within the amorphous phase can be explained by the choice of mechanosynthesis: the mechanical energy of the impact of balls against the powder creates a local melting/quenching area in which higher quenching rates occur, possibly higher than 100 °C/s 29 . An extended amorphous domain can therefore be potentially reached using mechanical milling.…”

Crystallization of glass materials into transparent optical ceramics

“…In contrast, several reports have focused on non-oxide transparent glass-ceramics [47] and transparent glass-ceramics with a refractive index gradient based on the gradient of crystallization [48]. Mechanical milling (mechano-chemical synthesis), for example, has aided in the preparation of amorphous precursor chalcogenide powders, which are typically outside the glassy domain when synthesized via the conventional melt-quenching technique, and are used in the fabrication of transparent glass-ceramics in spark plasma sintering (SPS) furnaces [49,50]. However, because of the limitations and reasons described above, this review discusses only transparent ceramics obtained through the glass crystallization route that exhibit optical transparency in the visible spectrum.…”

“…[48] Mechanical milling (mechano-chemical synthesis), for example, has aided in the preparation of amorphous precursor chalcogenide powders, which are typically outside the glassy domain when synthesized via the conventional melt-quenching technique, and are used in the fabrication of transparent glass-ceramics in spark plasma sintering (SPS) furnaces. [49,50] However, because of the limitations and reasons described above, this review discusses only transparent ceramics obtained through the glass crystallization route that exhibit optical transparency in the visible spectrum. underneath it (this explanation holds true only for the ceramics transparent in the visible part of the electromagnetic spectrum, which is the focus of this review, as emphasized in the previous section).…”