Structure and chemical durability of barium borosilicate glass–ceramics containing zirconolite and titanite crystalline phases

AbstractHot isostatically pressed (HIPed) glass-ceramics for the immobilization of uranium-rich intermediate-level wastes and Hanford K-basin sludges were designed. These were based on pyrochlore-structured Ca(1-x)U(1+y)Ti2O7 in glass, together with minor crystalline phases. Detailed microstructural, diffraction and spectroscopic characterization of selected glass-ceramic samples has been performed, and chemical durability is adequate, as measured by both MCC-1 and PCT-B leach tests.

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Preparation and characterization of SO3-doped barium borosilicate glass-ceramics containing zirconolite and barite phases

Ceramics International ◽

10.1016/j.ceramint.2016.09.190 ◽

2017 ◽

Vol 43 (1) ◽

pp. 534-539 ◽

Cited By ~ 8

Author(s):

Xin Wang ◽

Lang Wu ◽

Huidong Li ◽

Jizong Xiao ◽

Xin Cai ◽

...

Keyword(s):

Borosilicate Glass ◽

Glass Ceramics ◽

Barium Borosilicate Glass

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Crystalline phase, microstructure, and aqueous stability of zirconolite–barium borosilicate glass-ceramics for immobilization of simulated sulfate bearing high-level liquid waste

Journal of Nuclear Materials ◽

10.1016/j.jnucmat.2017.10.031 ◽

2018 ◽

Vol 498 ◽

pp. 241-248 ◽

Cited By ~ 4

Author(s):

Lang Wu ◽

Jizong Xiao ◽

Xin Wang ◽

Yuancheng Teng ◽

Yuxiang Li ◽

...

Keyword(s):

Borosilicate Glass ◽

Crystalline Phase ◽

Liquid Waste ◽

Glass Ceramics ◽

High Level Liquid Waste ◽

Barium Borosilicate Glass ◽

High Level

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Preparation and characterization of high chemical durability and low thermal expansion borosilicate glass-ceramics by recycling of borosilicate glass

Egyptian Journal of Chemistry ◽

10.21608/ejchem.2021.54579.3139 ◽

2021 ◽

Vol 0 (0) ◽

pp. 0-0

Author(s):

Osama Saad

Keyword(s):

Thermal Expansion ◽

Borosilicate Glass ◽

Glass Ceramics ◽

Chemical Durability ◽

High Chemical ◽

Low Thermal Expansion

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Investigation DSC and XRD on the Crystallization Kinetics in the Phosphate Li2O−Li2WO4−TiO2−P2O5 Glassy Ionic System

10.21203/rs.3.rs-190511/v1 ◽

2021 ◽

Author(s):

Hicham ES-SOUFI ◽

L. Bih ◽

Alan R. F. Lima ◽

A. El Bouari ◽

B. Manoun ◽

...

Keyword(s):

Crystallization Process ◽

Glass Ceramics ◽

Chemical Durability ◽

Surface Crystallization ◽

Vibrational Modes ◽

X Ray Diffraction ◽

Crystalline Phases ◽

X Ray ◽

Activation Energy Of Crystallization ◽

Avrami Parameter

Abstract This work aims to investigate the prepared glasses within the 20Li2O−(50−x)Li2WO4−xTiO2−30P2O5 system, with 0≤x≤15 mol%. The bonds constituting the framework of these glasses were studied by Raman spectroscopy. The data analysis of the chemical durability showed that the dissolution rates depend on the composition of each glass. Thermal analysis by DSC technique was used to determine the activation energy of crystallization, it found in the glass of composition (x= 5) that Ec= 184.482 kJ/mol. The determinate Avrami parameter is around 1.7 which allows suggesting the mechanism is surface crystallization. The crystallization process of the prepared glasses is carried out by heating samples at 550°c for 4 hours and 12 hours. The crystallized phases are identified by XRD. The results of X−ray diffraction analysis confirm that TiO2 acts mainly as network forming units. The crystalline phases Li2WO4 (JCPDS# 01−072−0086) and (JCPDS# 01−087−0409) are formed during the crystallization process. The formation of these crystalline phases into the glasses depends on the time of heating at fixed crystallization temperature. FTIR spectra of the glass–ceramics show nearly the same IR vibrational modes as their parent glasses.

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