scholarly journals Impact of recently discovered sodium calcium silicate solutions on the phase diagrams of relevance for glass-ceramics in the Na2O-CaO-SiO2 system

2022 ◽  
Author(s):  
Imam Santoso ◽  
Markus Riihimäki ◽  
David Sibarani ◽  
Pekka Taskinen ◽  
Leena Hupa ◽  
...  
Keyword(s):  
Phase Diagrams ◽  
Calcium Silicate ◽  
Glass Ceramics ◽  
Sio2 System ◽  
Sodium Calcium

Microstructure and Crystallization of MAS Glass-Ceramics Containing Alkali Oxides

2010 ◽  
Vol 177 ◽  
pp. 437-440
Author(s):  
Zhuo Hao Xiao ◽  
Jian Er Zhou ◽  
Yong Qing Wang
Keyword(s):  
Heat Treatment ◽  
Glass Ceramics ◽  
Melt Quenching ◽  
Base Glass ◽  
Sio2 Glass ◽  
Sio2 System ◽  
Treatment Conditions ◽  
Strength Tests ◽  
Alkali Oxides ◽  
Regular Network

MgO-Al2O3-SiO2 glass-ceramics containing 4.0w% alkali oxides were prepared by conven- tional melt quenching technique. The effects of heat treatment conditions on crystal types, microstructure and break strength of the glass-ceramics were studied by DSC, XRD, SEM and break strength tests. The main crystallization phases of this glass system are β-quartz (Li2-2xMgxAl2Si3O10) and β-Spodumene, no cordierite phase found. The glass-ceramics possessed a regular network-shaped microstructure feature formed by pyroxene crystals. With the increase of temperature, the β-Quartz around pyroxene crystals converted into β-spodumene and the regular network-shaped microstructure feature getting weaker and disappeared. The average break strength of the glass-ceramics containing no cordierite crystals based on MgO2-Al2O3-SiO2 system is about 150MPa, which is much high than the base glass.

Synthesis, characterization and formulation of sodium calcium silicate bioceramic for drug delivery applications

2016 ◽  
Vol 23 (4) ◽  
pp. 375-380
Author(s):  
P. Manohar Reddy ◽  
Ravy Lakshmi ◽  
Febin Prabhu Dass ◽  
Swamiappan Sasikumar
Keyword(s):  
Drug Delivery ◽  
Calcium Silicate ◽  
Release Kinetics ◽  
Release Profile ◽  
Apatite Formation ◽  
X Ray Diffraction ◽  
Drug Release Profile ◽  
Sodium Calcium ◽  
Calcium Magnesium ◽  
Model Drug

AbstractSodium calcium silicate (Na2CaSiO4) is a bioactive silicate with Na2O, CaO and SiO2 as its basic components, which is similar to that of the composition of bioactive glasses. In the present study, pure sodium calcium silicate was synthesized by rapid combustion technique, and the synthesized sample was characterized by powder X-ray diffraction to check the phase purity. The scaffolds were prepared by varying the ratio of sodium calcium silicate and polyvinyl alcohol, and the apatite-formation ability of the scaffolds was examined by soaking them in a simulated body fluid. The results revealed the formation of hydroxyapatite on the surface of the scaffold after 5 days, which is found to be rapid when compared with the bioactivity of the calcium silicates and calcium magnesium silicates. The scaffolds were also loaded with ciprofloxacin as a model drug and analyzed for its drug release profile using UV spectrophotometer. The release profile did not vary with the change in bioceramic-to-biopolymer ratio, and 60% of the drug was released in 10 days, which is within the appreciable range for a targeted drug delivery system. Moreover, the experimental and simulated values of the release kinetics were compared by applying the existing mathematical model.

Features of vertical cellular corrosion of refractories by molten sodium-calcium silicate glass

Refractories ◽  
1988 ◽  
Vol 29 (3-4) ◽  
pp. 194-198
Author(s):  
M. N. Kucheryavyi ◽  
V. P. Frolova ◽  
O. N. Popov
Keyword(s):  
Silicate Glass ◽  
Calcium Silicate ◽  
Sodium Calcium ◽  
Molten Sodium

Crystallization and properties of some CaO-Al2O3-SiO2 system glass-ceramics with Y2O3 addition

2006 ◽  
Vol 16 ◽  
pp. s105-s108 ◽  
Author(s):  
Wei-hong ZHENG ◽  
Jin-shu CHENG ◽  
Jian QUAN ◽  
Xian-chun LOU ◽  
Jian LIU
Keyword(s):  
Glass Ceramics ◽  
Sio2 System ◽  
Y2o3 Addition
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