Silicate Glasses and Glass–Ceramics: Types, Role of Composition and Processing Methods

2021 ◽  
pp. 119-152
Author(s):  
Dilshat Tulyaganov ◽  
Francesco Baino
Keyword(s):  
Glass Ceramics ◽  
Silicate Glasses ◽  
Processing Methods

scholarly journals Structural Role of Strontium Oxide in Modified Silicate Glasses

2021 ◽  
Author(s):  
Gomaa El-Damrawi ◽  
Rawia Ramadan ◽  
mohamed Biomey
Keyword(s):  
Calcium Phosphate ◽  
Network Structure ◽  
31P Nmr ◽  
Composition Range ◽  
Glass Ceramics ◽  
Silicate Glasses ◽  
Strontium Oxide ◽  
Amorphous Network ◽  
Heat Treated

Abstract In the composition range of x= 0-15 mol%, glasses in the system 24.5Na2O.24.5CaO.6P2O5.xSrO.(45-x)SiO2 have been studied. The glasses are transparent and have an amorphous network structure when they are as prepared. Heat treated glasses, on the other hand, are transformed into opaque white glass ceramics with a highly crystalline network structure. The main well-formed crystalline species in material bioactivity were apatite (calcium phosphate, Ca3(PO4)2, wollastonite (calcium silicate, CaSiO3), and strontium calcium phosphate [Ca2Sr(PO4)2. Increasing SrO improves material crystallite and increases the host glass matrix's hardness. The modification of the apatit Ca(PO3)2 to involve Sr ions inducing Ca2Sr (PO4)2 apatite one is thought to be the cause of the change in XRD spectra, 31P NMR chemical shift, and hardness number as SrO increases. These species help to improve material properties and hardness.

scholarly journals Structural Role of Cerium Oxide in Lead Silicate Glasses and Glass Ceramics

2018 ◽  
Vol 06 (03) ◽  
pp. 438-447
Author(s):  
Gomaa El-Damrawi ◽  
Amal Behairy
Keyword(s):  
Cerium Oxide ◽  
Glass Ceramics ◽  
Silicate Glasses ◽  
Lead Silicate ◽  
Structural Role

Magnetic Properties of xCeO2•(50 − x) PbO•50B2O3 Glasses and Glass Ceramics

2017 ◽  
Vol 13 (1) ◽  
pp. 4486-4494 ◽  
Author(s):  
G.El Damrawi ◽  
F. Gharghar
Keyword(s):  
Magnetic Properties ◽  
Large Scale ◽  
Glass Ceramics ◽  
Magnetic Behavior ◽  
Crystal Formation ◽  
Dual Roles ◽  
Effective Agent ◽  
Ordered Structures ◽  
Essential Change

Cerium oxide in borate glasses of composition xCeO2·(50 − x)PbO·50B2O3 plays an important role in changing both microstructure and magnetic behaviors of the system. The structural role of CeO2 as an effective agent for cluster and crystal formation in borate network is clearly evidenced by XRD technique. Both structure and size of well-formed cerium separated clusters have an effective influence on the structural properties. The cluster aggregations are documented to be found in different range ordered structures, intermediate and long range orders are the most structures in which cerium phases are involved. The nano-sized crystallized cerium species in lead borate phase are evidenced to have magnetic behavior.  The criteria of building new specific borate phase enriched with cerium as ferrimagnetism has been found to keep the magnetization in large scale even at extremely high temperature. Treating the glass thermally or exposing it to an effective dose of ionized radiation is evidenced to have an essential change in magnetic properties. Thermal heat treatment for some of investigated materials is observed to play dual roles in the glass matrix. It can not only enhance alignment processes of the magnetic moment but also increases the capacity of the crystallite species in the magnetic phases. On the other hand, reverse processes are remarked under the effect of irradiation. The magnetization was found to be lowered, since several types of the trap centers which are regarded as defective states can be produced by effect of ionized radiation. 

Assessment of role of iron ions on the physical and spectroscopic properties of multi-component Na2O−PbO−Bi2O3−SiO2 glass ceramics

2017 ◽  
Vol 91 (1) ◽  
pp. 92-107 ◽  
Author(s):  
M. V. Sambasiva Rao ◽  
A. Suneel Kumar ◽  
G. Chinna Ram ◽  
Ch. Tirupataiah ◽  
D. Krishna Rao
Keyword(s):  
Glass Ceramics ◽  
Spectroscopic Properties ◽  
Iron Ions ◽  
Sio2 Glass

Role of precursor concentrations on the formation of ternary Pb1−Sr Se QDs in silicate glasses

2021 ◽  
Vol 266 ◽  
pp. 115066
Author(s):  
Yingrui Liu ◽  
Xiaochun Li ◽  
Yong Su ◽  
Jing Wang ◽  
Xin Shao ◽  
...  
Keyword(s):  
Silicate Glasses

Preparation and characterization of some multicomponent silicate glasses and their glass–ceramics derivatives for dental applications

2009 ◽  
Vol 35 (3) ◽  
pp. 1211-1218 ◽  
Author(s):  
Fatma H. ElBatal ◽  
Moenis A. Azooz ◽  
Yousry M. Hamdy
Keyword(s):  
Glass Ceramics ◽  
Silicate Glasses ◽  
Dental Applications

Bioactivity potential of calcium alumino-silicate glasses and glass–ceramics containing nitrogen and fluorine

2014 ◽  
Vol 49 (13) ◽  
pp. 4590-4594 ◽  
Author(s):  
A. R. Hanifi ◽  
C. M. Crowley ◽  
M. J. Pomeroy ◽  
Stuart Hampshire
Keyword(s):  
Glass Ceramics ◽  
Silicate Glasses ◽  
Alumino Silicate

Structural role of chromium sulfate in modified borate glasses and glass ceramics

Materialia ◽  
2021 ◽  
pp. 101095
Author(s):  
G. El-Damrawi ◽  
A.M. Abdelghany ◽  
M.I. Abdelghany ◽  
M.A. Madshal
Keyword(s):  
Glass Ceramics ◽  
Borate Glasses ◽  
Structural Role ◽  
Chromium Sulfate

Structural Characterization of Strontium Silicate Glasses and Glass Ceramics Applied as Glass Ionomer Cements (GICs)

Silicon ◽  
2022 ◽  
Author(s):  
Gomaa El Damrawi ◽  
Mohamed El Baiomy ◽  
Rawya Mohammed Ramadan
Keyword(s):  
Structural Characterization ◽  
Glass Ceramics ◽  
Silicate Glasses ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Strontium Silicate

scholarly journals Relaxation of scratch-induced surface deformation in silicate glasses: Role of densification and shear flow in lateral indentation experiments

2018 ◽  
Vol 500 ◽  
pp. 382-387 ◽  
Author(s):  
Elham Moayedi ◽  
Shigeki Sawamura ◽  
Jana Hennig ◽  
Enrico Gnecco ◽  
Lothar Wondraczek
Keyword(s):  
Shear Flow ◽  
Surface Deformation ◽  
Silicate Glasses
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