ChemInform Abstract: Lanthanide-Activated Na5Gd9F32Nanocrystals Precipitated from a Borosilicate Glass: Phase-Separation-Controlled Crystallization and Optical Property.

ChemInform ◽  
2015 ◽  
Vol 46 (11) ◽  
pp. no-no
Author(s):  
Daqin Chen ◽  
Zhongyi Wan ◽  
Yang Zhou ◽  
Yan Chen ◽  
Hua Yu ◽  
...  
Keyword(s):  
Phase Separation ◽  
Optical Property ◽  
Borosilicate Glass ◽  
Glass Phase ◽  
Controlled Crystallization

Sassolite Formation in Glass Powders: A Novel Method to Study Phase Separation in Alkali Borosilicate Glass Compositions

2010 ◽  
Vol 93 (10) ◽  
pp. 3027-3030 ◽  
Author(s):  
C. J. Dileep Kumar ◽  
M. A. Shadiya ◽  
E. K. Sunny ◽  
N. Raghu ◽  
N. Venkataramani ◽  
...  
Keyword(s):  
Phase Separation ◽  
Borosilicate Glass ◽  
Study Phase ◽  
Novel Method ◽  
Glass Compositions ◽  
Glass Powders

Micro-Morphology of Crystal Separated from Glass by the Heat-Treatment with an Electric Field

2007 ◽  
Vol 280-283 ◽  
pp. 1647-1650
Author(s):  
Guoliang Wang ◽  
Kai Ming Liang ◽  
Wei Liu ◽  
An Min Hu ◽  
Feng Zhou ◽  
...  
Keyword(s):  
Experimental Data ◽  
Heat Treatment ◽  
Free Energy ◽  
Phase Separation ◽  
Electric Field ◽  
Borosilicate Glass ◽  
Free Energy Change ◽  
Silver Particles ◽  
Micro Morphology ◽  
Calculation Analysis

By means of SEM, the micro-morphology of silver particles separated from borosilicate glass by the heat-treatment with an electric field is investigated. The distribution of the silver particles appears clusters. This result is explained by an energy viewpoint. Based on hermodynamics theory of phase separation, the calculation of the free energy change during the heat-treatment in an electric field is performed by means of the Ansoft Maxwell software. The results of this calculation analysis are found to be very close to the experimental data.

Meso- and Macroporous Ceramics by Phase Separation and Reactive Sintering Methods

MRS Bulletin ◽  
2009 ◽  
Vol 34 (8) ◽  
pp. 587-591 ◽  
Author(s):  
Yoshikazu Suzuki ◽  
Peter E.D. Morgan
Keyword(s):  
Phase Separation ◽  
Porous Structure ◽  
Borosilicate Glass ◽  
Selective Etching ◽  
Separation Method ◽  
Reactive Sintering ◽  
Synthesis Technique ◽  
Recent Developments ◽  
New Applications ◽  
Sintering Method

AbstractControlled pore glasses are formed through selective etching of one phase of a spinodally decomposed borosilicate glass, an old technique that is the basis of the porous Vycor synthesis technique developed in the 1920s. This technique is receiving renewed attention as these glasses find new applications as substrates for biosensing, bioreactors, precise filtration, and chromatography. Analogous techniques are being applied to crystalline ceramics, such as directed cooling of ZrO2/MgO and MgAl2O4/Al2O3 eutectics to drive phase separation with the subsequent dissolution of one phase. Pyrolytic reactive sintering is a combination of the phase separation method and the reactive sintering method to obtain a 3D porous structure network. For example, dolomite (CaMg[CO3]2) and ZrO2 yield a uniformly porous CaZrO3/MgO composite that utilizes evolved CO2 as a “pore-forming agent.” This article gives an overview of recent developments on meso- and macroporous ceramics based on phase separation and reactive sintering technologies.

Initial Investigation Into the Vitrification of High Molybdenum Solids in Borosilicate Glass

2009 ◽  
Vol 1193 ◽  
Author(s):  
Barbara F. Dunnett ◽  
Nick R. Gribble ◽  
Andrew D. Riley ◽  
Carl J. Steele
Keyword(s):  
Phase Separation ◽  
Borosilicate Glass ◽  
Spent Nuclear Fuel ◽  
Storage Tanks ◽  
Waste Storage ◽  
Waste Vitrification ◽  
Durability Testing ◽  
Glass Formulation ◽  
Selection Of ◽  
Scanning Electron

AbstractSellafield Ltd operates a Waste Vitrification Plant (WVP) to immobilise the arisings from the reprocessing of spent nuclear fuel. Washout of solids from the base of waste storage tanks in preparation for decommissioning is likely to produce feeds enriched in molybdenum to the WVP. Vitrification of such feeds in the borosilicate glass formulation currently used by the WVP for vitrification of reprocessing waste has been investigated to determine the maximum achievable loading of MoO3.The vitrification of molybdenum in the absence and presence of reprocessing waste was studied. A number of glasses were manufactured in the laboratory containing various waste loadings. The resultant glasses were examined both visually and under the scanning electron microscope for the presence of any phase separation. Additional aluminium was added to the glasses manufactured in the absence of reprocessing waste to improve the durability of the glass. In borosilicate glass containing 3.5 wt% Al2O3 the onset of a molybdenum phase separation was observed in glasses containing 2.6 wt% MoO3. In the presence of Magnox reprocessing waste, phase separation was observed when the product contained >3.8 wt% MoO3. Soxhlet durability testing of a selection of the glasses manufactured was carried out. The Soxhlet durability of glasses in the absence of phase separation was good.

Nanocement Produced from Borosilicate Bioactive Glass Nanoparticles Composited with Alginate

2019 ◽  
Vol 72 (5) ◽  
pp. 354 ◽  
Author(s):  
Xin Xie ◽  
Libin Pang ◽  
Aihua Yao ◽  
Song Ye ◽  
Deping Wang
Keyword(s):  
Compressive Strength ◽  
Bioactive Glass ◽  
Sodium Alginate ◽  
Borosilicate Glass ◽  
Glass Phase ◽  
Solid Phase ◽  
Setting Time ◽  
Sol Gel ◽  
Bone Cements ◽  
Composite Bone

A novel injectable bone cement was prepared using sol–gel derived borosilicate bioactive glass nanoparticles as a solid phase and sodium alginate solution as a liquid phase. The gelation reaction of the alginate was modulated by Ca2+ ions released from the borosilicate glass phase, which in turn greatly depended on the boron content of the borosilicate glass phase. Such a gelation reaction not only significantly enhanced the anti-washout property of the bone cements, but also allowed control of the setting, handling properties, and compressive strength of the composite bone cements. Consequently, bone cements with controllable performances can be developed by simply adjusting the B2O3/SiO2 ratio of the borosilicate glass phase. Borosilicate bioactive glass with 20–30 mol-% borate contents exhibit a short setting time, good compressive strength, injectability, and anti-washout properties. With controllable performances and excellent bioactivity, the borosilicate bioactive glass/sodium alginate (BSBG/SA) composite bone cements are highly attractive for bone filling and regeneration applications.

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