scholarly journals The effect of boron substitution for aluminium on the microstructure of calcium fluoro-aluminosilicate glasses and glass-ceramics

2019 ◽  
Vol 39 (5) ◽  
pp. 1918-1924 ◽  
Author(s):  
Siqi Zhang ◽  
Artemis Stamboulis ◽  
Wen Ni
Keyword(s):  
Glass Ceramics ◽  
Aluminosilicate Glasses ◽  
Boron Substitution

Chemical Route to Aluminosilicate Gels, Glasses and Ceramics

1986 ◽  
Vol 73 ◽  
Author(s):  
J. C. Pouxviel ◽  
J. P. Boilot ◽  
A. Dauger ◽  
L. Huber
Keyword(s):  
Thermal Treatment ◽  
Glass Ceramics ◽  
Silica Matrix ◽  
Chemical Route ◽  
Transparent Glass ◽  
Aluminosilicate Glasses ◽  
Optically Transparent ◽  
Metal Organic ◽  
Organic Precursors ◽  
Homogeneous Crystallization

ABSTRACTChemically ultra-homogeneous gels have been prepared, in the SiO2-Al2O3 system, using new metal-organic precursors with Al-O-Si linkages. By thermal treatment at 900°C, transparent monolithic gels lead to aluminosilicate glasses and above 1000°C, to optically transparent glass-ceramics (for instance by homogeneous crystallization of mullite in an amorphous silica matrix).

Structural evolution of Ni environment in lithium, magnesium and zinc aluminosilicate glasses and glass-ceramics

2015 ◽  
Vol 413 ◽  
pp. 24-33 ◽  
Author(s):  
A. Dugué ◽  
O. Dymshits ◽  
L. Cormier ◽  
B. Cochain ◽  
G. Lelong ◽  
...  
Keyword(s):  
Glass Ceramics ◽  
Structural Evolution ◽  
Aluminosilicate Glasses

Eu 3+ and Ce 3+ co-doped aluminosilicate glasses and transparent glass-ceramics containing gahnite nanocrystals

2017 ◽  
Vol 69 ◽  
pp. 372-377 ◽  
Author(s):  
M. Reza Dousti ◽  
Atiar R. Molla ◽  
Ana Candida M. Rodrigues ◽  
Andrea S.S. de Camargo
Keyword(s):  
Glass Ceramics ◽  
Transparent Glass ◽  
Aluminosilicate Glasses ◽  
Co Doped

Microcrystal Growth in Heat-Treating Process for Europium Ions Doped Aluminosilicate Glasses

2012 ◽  
Vol 193-194 ◽  
pp. 462-465
Author(s):  
Wan Guo ◽  
Xin Zhao ◽  
Shu Wen Jiang ◽  
Zhi Qiang Wang ◽  
Li Zheng ◽  
...  
Keyword(s):  
Single Phase ◽  
Secondary Particle ◽  
Glass Ceramics ◽  
Blue Emission ◽  
Heat Treating ◽  
Blue Emission Band ◽  
Aluminosilicate Glasses ◽  
Internal Network ◽  
Sem Micrograph ◽  
Narrow Emission

Eu doped YAG glass ceramics containing single phase of YAG micro-cryatals have been obtained by heat-treating the aluminosilicate precursor glasses. The primary crystallite size of YAG phase is calculated to be ~46 nm and the crystal grains grow with preffered orientation (444) in the internal network. The average secondary particle size is estimated to be ~8μm and the larger grain size is due to the particle aggregation. The pilotaxitic texture of YAG glass ceramics presented in SEM micrograph, can increase yield strength and tensile strength of the sample effectively. The emission spectrum of Eu doped YAG glass ceramics consists of a broad blue emission band and several narrow emission bands, indicating the coexistence of Eu3+ and Eu2+ ions in YAG glass ceramics.

Apatite-Leucite Micro/Nano Crystals from Aluminosilicate Glasses for Dental Applications

2011 ◽  
Vol 694 ◽  
pp. 435-439
Author(s):  
Pat Sooksaen ◽  
Faisol Panyusoh ◽  
Siwat Atthapinan ◽  
Wonrawee Wae Noh
Keyword(s):  
Crystal Structure ◽  
Fracture Toughness ◽  
Chemical Bonding ◽  
Vickers Microhardness ◽  
Glass Ceramics ◽  
Aluminosilicate Glasses ◽  
Powder Samples ◽  
Different Temperatures ◽  
Ft Ir ◽  
Dental Applications

Needle-like apatite-leucite glass-ceramics were synthesized in the SiO2-Al2O3-Na2O-K2O-P2O5 CaO-CaF2 system. Four glass batches were prepared by varying SiO2/P2O5 ratio, then melted and quenched. Crystallization was studied in compacted powder samples at different temperatures. Glasses were characterized for chemical bonding by FT-IR, phases and crystal structure by XRD, microstructure by SEM and hardness and fracture toughness by Vickers microhardness.

Bismuth-doped zinc aluminosilicate glasses and glass-ceramics with ultra-broadband infrared luminescence

2007 ◽  
Vol 29 (5) ◽  
pp. 556-561 ◽  
Author(s):  
Mingying Peng ◽  
Danping Chen ◽  
Jianrong Qiu ◽  
Xiongwei Jiang ◽  
Congshan Zhu
Keyword(s):  
Glass Ceramics ◽  
Aluminosilicate Glasses ◽  
Infrared Luminescence

The Effect of Fluorine on the Viscosity and Crystallization of Lithium Aluminosilicate Glasses

2012 ◽  
Vol 509 ◽  
pp. 346-352
Author(s):  
Wei Hong Zheng ◽  
Yang Dai ◽  
Mo Zhou Lin ◽  
Kun Yang ◽  
Hao Wu
Keyword(s):  
Melting Temperature ◽  
Glass Ceramics ◽  
Fluorine Content ◽  
X Ray Diffraction ◽  
Lithium Aluminosilicate ◽  
X Ray ◽  
Melting Temperatures ◽  
Aluminosilicate Glasses ◽  
Main Crystalline Phase ◽  
Rotation Viscometer

Lithium aluminosilicate glasses have high viscosities, resulting in high melting temperatures and processing temperatures. In this study, F was added to the LAS glasses to reduce the melting temperature and viscosity for float process. The effects of fluorine content on the viscosity and crystallization of the parent glasses were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), differential thermal analysis (DTA) and rotation viscometer. It was found that the addition of F was useful in reducing the melting temperature and viscosity. The main crystalline phase of resulting glass-ceramics was β-spodumene. The activation energy (E) of LAS glasses was decreased from 460.3 KJ/mol to 417.7 KJ/mol with the addition of 2.63 wt% F, which accelerated the crystallization and enhanced the crystallinity of specimens.

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