Spark Plasma Sintering: An Easy Way to Make Infrared Transparent Glass–Ceramics

Abstract

International audienceInfrared transparent glass-ceramics have been prepared in the system GeS2-Sb2S3-CsCl using spark plasma sintering in shorter times in comparison with conventional thermal treatments. The combined effects of pressure, time, and temperature allow the controlled crystallization of Cs-based crystals. The different glass-ceramics have been characterized by scanning electron microscopy and X-ray diffraction. The optical properties were also investigated

Controllable Formation of the Crystalline Phases in Ge–Ga–S Chalcogenide Glass‐Ceramics

“…Some methods, such as adding of the alkali halide or PbS quantum dots into chalcogenide glasses, have been developed to control the formation of the nanocrystals in various systems including GeS 2 –Sb 2 S 3 –In 2 S 3, GeS 2 –Ga 2 S 3 , GeS 2 –Sb 2 S 3 –CsCl, GeS 2 –In 2 S 3, and GeS 2 –In 2 S 3 –CsI . However, the relatively high halide content in chalcogenide glasses causes the difficulty in controlling the size of the nanoparticles and leads to poor chemical durability, and sometimes the dopants in the chalcogenide glasses are liable to induce the precipitation of the different crystals simultaneously.…”

A Novel Approach to Develop Chalcogenide Glasses and Glass-Ceramics by Pulsed Current Electrical Sintering (PCES)

“…Indeed, the fast heating rates reached by SPS (Joule effect heating) prevents the glass from undesirable crystallization. Also, the SPS technique is efficient to Sintering of Ceramics -New Emerging Techniques 282 make IR glass-ceramics from glass powder with reduced time of crystallization in comparison with conventional technique, i.e, heating a glass bulk in a conventional furnace (Delaizir et al, 2010). Two different compositions have been tested: 62.5GeS 2 -12.5Sb 2 S 3 -25CsCl (% mol) and 80GeSe 2 -20Ga 2 Se 3 (% mol); the results are reported.…”

Transparent chalcogenide glass-ceramics

“…The combination of amorphization by mechanical milling and densification by spark plasma sintering (SPS) was described. The SPS technique has demonstrated the possibility to make chalcogenide glasses and glass-ceramics with desired dimensions without using silica tubes (Delaizir et al, 2010). The advantages of this approach are associated with the synthesis of amorphous chalcogenide powders near room temperature and with the possibility of fast precision molding of infrared optics by SPS.…”