The Preparation of Bioactive Glass Microspheres in W/O Emulsion

2011 ◽  
Vol 239-242 ◽  
pp. 1149-1152
Author(s):  
Qun Feng Liu ◽  
Bo Yuan ◽  
Xiao Feng Chen
Keyword(s):  
Bioactive Glass ◽  
Sol Gel ◽  
Synthesis Process ◽  
Silica Spheres ◽  
Glass Microspheres ◽  
Stage Synthesis ◽  
Particle Size And Morphology ◽  
Size And Morphology ◽  
Two Stages ◽  
Hydrolysis Of

The emulsion combining sol-gel method was used to prepare spherical bioactive glass in the present work. This method involves a two-stage synthesis process: the pre-hydrolysis of tetraethyl orthosilicate (TEOS) in an aqueous acidic solution using templates, and afterward the fabrication of silica spheres by pH induced rapid gelation in a W/O emulsion. Through controlling the two stages separately, the particle size and morphology of silica spheres can be adjusted. These results indicated that emulsion method could supply a good way to prepare glass microspheres.

Hybrid Bioactive Glass-Polyvinyl Alcohol Prepared by Sol-Gel

2008 ◽  
Vol 587-588 ◽  
pp. 62-66 ◽  
Author(s):  
Hermes S. Costa ◽  
Alexandra A.P. Mansur ◽  
Edel Figueiredo Barbosa-Stancioli ◽  
Marivalda Pereira ◽  
Herman S. Mansur
Keyword(s):  
Mechanical Properties ◽  
Polyvinyl Alcohol ◽  
Bioactive Glass ◽  
Sol Gel ◽  
Degree Of Hydrolysis ◽  
Bioactive Glasses ◽  
Composite Foams ◽  
Composition Ratios ◽  
Hybrid Scaffolds ◽  
Hydrolysis Of

Bioactive glasses are materials that have been used for the repair and reconstruction of diseased bone tissues, as they exhibit direct bonding with human bone tissues. However, bioactive glasses have low mechanical properties compared to cortical and cancellous bone. On the other hand, composite materials of biodegradable polymers with inorganic bioactive glasses are of particular interest to engineered scaffolds because they often show an excellent balance between strength and toughness and usually improved characteristics compared to their individual components. Composite bioactive glass-polyvinyl alcohol foams for use as scaffolds in tissue engineering were previously developed using the sol-gel route. The goal of this work was the synthesis of composite foams modified with higher amounts of PVA. Samples were characterized by morphological and chemical analysis. The mechanical behavior of the obtained materials was also investigated. The degree of hydrolysis of PVA, concentration of PVA solution and different PVA-bioactive glass composition ratios affect the synthesis procedure. Foams with up to 80 wt% polymer content were obtained. The hybrid scaffolds obtained exhibited macroporous structure with pore size varying from 50 to 600 µm and improved mechanical properties.

Surfactant-assisted sol–gel synthesis of mesoporous bioactive glass microspheres

2019 ◽  
Vol 8 (2) ◽  
pp. 126-134
Author(s):  
Fabian Zemke ◽  
Valerie Schölch ◽  
Maged F Bekheet ◽  
Franziska Schmidt
Keyword(s):  
Bioactive Glass ◽  
Sol Gel ◽  
Glass Microspheres ◽  
Sol Gel Synthesis ◽  
Surfactant Assisted ◽  
Mesoporous Bioactive Glass

The Properties of YSZ-Ni-Cr Cermet Fabricated by Sol-Gel Method

2012 ◽  
Vol 535-537 ◽  
pp. 787-790
Author(s):  
Shu Lan Guo ◽  
Min Wang ◽  
Su Hua Lv ◽  
Jia Li ◽  
Xian Chang Du
Keyword(s):  
Particle Size ◽  
Sol Gel ◽  
Hot Press ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Particle Size And Morphology ◽  
Size And Morphology ◽  
Increasing Temperature ◽  
Hot Press Sintering

The properties of YSZ-Ni-Cr cermet fabricated by Sol-Gel Method（YSZ-Ni-Cr powder was synthesized by coprecipitation method at 850°C for 2 h and was processed into YSZ-Ni-Cr cermet by hot-press sintering at 1350°C for 1 h）was explored. The identification of phases was carried out using a X-ray diffractometer (XRD). The particle size and morphology was determined by electron microscopys(SEM/TEM) The conductivity had a tendency to decrease with increasing temperature. This behavior can be accounted for that there are two conduction paths through the cermet, an electronic path through the (Ni,Cr) metal phase and an ionic path through the ZrO2-Y2O3 phase.

Porous bioactive glass microspheres prepared by flame synthesis process

2019 ◽  
Vol 256 ◽  
pp. 126625 ◽  
Author(s):  
Jozef Kraxner ◽  
Martin Michalek ◽  
Acacio Rincon Romero ◽  
Hamada Elsayed ◽  
Enrico Bernardo ◽  
...  
Keyword(s):  
Bioactive Glass ◽  
Synthesis Process ◽  
Flame Synthesis ◽  
Glass Microspheres

Synthesis and Bioactivity of Sol-Gel Derived Porous, Bioactive Glass Microspheres Using Chitosan as Novel Biomolecular Template

2011 ◽  
Vol 95 (1) ◽  
pp. 30-33 ◽  
Author(s):  
Bo Lei ◽  
Kwan-Ha Shin ◽  
Young-Wook Moon ◽  
Da-Young Noh ◽  
Young-Hag Koh ◽  
...  
Keyword(s):  
Bioactive Glass ◽  
Sol Gel ◽  
Glass Microspheres

Preparation of fine multicomponent oxide ceramic powder by a combustion synthesis process

1994 ◽  
Vol 9 (8) ◽  
pp. 1997-2004 ◽  
Author(s):  
Yangsheng Zhang ◽  
Gregory C. Stangle
Keyword(s):  
Ceramic Powder ◽  
Synthesis Process ◽  
Maximum Temperature ◽  
Oxide Ceramic ◽  
Multicomponent Oxide ◽  
Powder Packing ◽  
Ferrite Material ◽  
Maximum Reaction ◽  
Particle Size And Morphology ◽  
Size And Morphology

An important, rather novel procedure for the synthesis of submicron crystalline multicomponent oxide ceramic powders has been studied. The synthesis of CuFe2O4 powder, a ferrite material, has been used as a model system for understanding the synthesis process. The effect of the fuel content, powder packing, and surface heat loss has been investigated in terms of the maximum reaction temperature and reaction period, phase formation, and particle size and morphology. It has been shown that the maximum temperature and reaction period can be tailored to produce different phases. The submicron features of the synthesized powders are indicated by the large surface area values obtained from BET measurement.

Novel Non-aqueous Sol-Gel Synthesis of Carbon-Coated LiMPO4 (M = Fe, Mn, Co) for Lithium Ion Batteries

2004 ◽  
Vol 835 ◽  
Author(s):  
Jingsi Yang ◽  
Jun John Xu
Keyword(s):  
Sol Gel ◽  
Lithium Ion ◽  
Uniform Size ◽  
Carbon Coated ◽  
Specific Discharge ◽  
Particle Size And Morphology ◽  
Size And Morphology ◽  
Conventional Solution ◽  
Sol Gel Synthesis

ABSTRACTA simple organic solvent based sol-gel method for synthesis of carbon-coated LiFePO4 is developed. Phase pure LiFePO4 with uniform size of 200–300 nm and no agglomeration is obtained, with 1.8 wt % surface carbon formed in-situ. Such a material gives specific discharge capacities of 150 mAh/g and 145 mAh/g at C/5 and 2C at room temperature, respectively, with desirable cycling stability. The dependence of particle size and morphology on precursor concentrations is opposite to conventional solution based methods. Other LiMPO4 (M = Mn, Co, Ni, etc) with favorable physical characteristics can be synthesized the same way.

Synthesis of Calcium Carbonate from Calcium Chlorine Solution Using Homogeneous Precipitation Method

2005 ◽  
Vol 486-487 ◽  
pp. 542-545 ◽  
Author(s):  
Kyung Nam Kim ◽  
Dae Yong Shin ◽  
Se Gu Son ◽  
Yong Do Kim
Keyword(s):  
Particle Size ◽  
Calcium Carbonate ◽  
Precipitation Method ◽  
Homogeneous Precipitation ◽  
Reaction Conditions ◽  
Homogeneous Precipitation Method ◽  
Reaction Solution ◽  
Particle Size And Morphology ◽  
Size And Morphology ◽  
Hydrolysis Of

Calcium carbonate(CaCO3) was synthesized from aqueous CaCl2 solution, using the homogeneous precipitation technique, which uses the hydrolysis of urea. The effects of reaction conditions on the morphology of CaCO3 were examined at 50-90°C. Particle size of CaCO3 decreases, as the concentrations of urea and [Ca2+] are increased. Calcite is produced more, as the concentration of [Ca2+] is increased. Method to stir the reaction solution affects significantly the particle size and morphology of CaCO3. Uniform needle-like aragonite particles were obtained, when left at 90°C for 4hours without stirring.

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