Mechanical alloying and molding by spark plasma sintering of telluride based glasses

Valentin Reux; Laurent Calvez; Antoine Gautier; Hongli Ma; Frédéric Charpentier; Hugues Tariel; Xiang-Hua Zhang

doi:10.1117/12.2608128

4 March 2022 Mechanical alloying and molding by spark plasma sintering of telluride based glasses

Valentin Reux, Laurent Calvez, Antoine Gautier, Hongli Ma, Frédéric Charpentier, Hugues Tariel, Xiang-Hua Zhang

Proceedings Volume 11997, Optical Components and Materials XIX; 119970E (2022) https://doi.org/10.1117/12.2608128
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Alternative way of synthesis for high refractive index tellurides based glasses has been experimented, in addition to low temperature Spark Plasma Sintering. The composition tested, Ge₂₅Se₁₀Te₆₅, has been chose in the Ge-Se-Te system and characterized. Its index refractive index of 3.12 and overall optical, thermal and mechanical properties makes it the perfect candidate for IR application. However, due to its relative instability regarding crystallization, formation of GeTe crystals occurs during mechanical alloying using raw elements. Transparency has not been achieved in the sintered samples using this powder, as the crystallization rate is accelerated by the pressure during the process. In parallel, glass samples synthesized by melt-quenching have been used to determine optimal sintering parameters for this composition. The main issue met during those tests has been the carbon contamination, reducing overall transparency of the samples through scatterings. As such, it has been shown that the critical parameter to consider to limiting this pollution is the powder granulometry, needing to be above 100μm for optimal performance. This shows the potential for this method to produce high refractive index IR optics, using even unstable glasses.

Conference Presentation

Citation Download Citation

Valentin Reux, Laurent Calvez, Antoine Gautier, Hongli Ma, Frédéric Charpentier, Hugues Tariel, and Xiang-Hua Zhang "Mechanical alloying and molding by spark plasma sintering of telluride based glasses", Proc. SPIE 11997, Optical Components and Materials XIX, 119970E (4 March 2022); https://doi.org/10.1117/12.2608128

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available