Effect of Heat Treatment Conditions on Microstructure and Infrared Transmission Property of Germanate Oxyfluoride Glass-Ceramics

Zhuo Hao Xiao; Sheng Long Wang

doi:10.4028/www.scientific.net/MSF.663-665.1285

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HomeMaterials Science ForumMaterials Science Forum Vols. 663-665Effect of Heat Treatment Conditions on...

Effect of Heat Treatment Conditions on Microstructure and Infrared Transmission Property of Germanate Oxyfluoride Glass-Ceramics

Abstract:

Germanate oxyfluoride glass in CaF2/BaF2-AlF3-SiO2-GeO2 was prepared by melt quenching technique and subsequently converted to glass-ceramics with microstructures comprised nano-crystallites in a residual glass matrix by two-step heat treatments process. DSC, XRD, SEM and IR transmission investigations were used to determine structural characteristics and optical property of the prepared germanate oxyfluoride glass-ceramics. The influences of heat treatment conditions on crystallization behaviors and infrared transmission were discussed. The results show that crystal phase in the glass-ceramics is only Ge2Al6O13 and the crystal size is about 20nm-80nm when treated temperature ranges from 900 oC to 960oC. Good transparency is exhibited in visible light band to midinfrared band (5.0um) when treated temperature is low than 940 oC.

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Periodical:

Materials Science Forum (Volumes 663-665)

Pages:

1285-1288

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.663-665.1285

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Online since:

November 2010

Authors:

Zhuo Hao Xiao, Sheng Long Wang

Keywords:

Crystallization Behavior, Germanate Glass, Glas Ceramics, Infrared Transmittance

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