Preparation and Characterization of Bioactive and Magnetic Biphasic Thermo-Seeds Material

2013 ◽  
Vol 834-836 ◽  
pp. 301-304
Author(s):  
Jian An Liu ◽  
Xue Na Yang ◽  
Mei Mei Zhang
Keyword(s):  
Magnetic Property ◽  
Phase Composition ◽  
Glass Ceramic ◽  
Body Fluid ◽  
Glass Ceramics ◽  
Magnetic Behavior ◽  
In Vitro Bioactivity ◽  
Magnetic Glass

A novel biphasic material has been synthesized from a melt-derived bioactive glass (45S5) and a glass-ceramic obtained from a melt-derived magnetic glass-ceramics for hyperthermia application. The biphasic material obtained from a mixture 1:1 of these components. The phase composition was investigated by XRD. The magnetic property was measured by VSM. The in vitro bioactivity was investigated by simulated body fluid (SBF) soaking experiment. The glass-ceramic shows magnetic behavior and bioactive, useful for hyperthermia.

In Vitro Bioactivity Characterization of Machinable Glass Ceramics Containing 85wt% Na-mica and 15wt% Fluorapatite

2006 ◽  
Vol 309-311 ◽  
pp. 325-328 ◽  
Author(s):  
Gültekin Göller ◽  
Ipek Akin ◽  
A. Kahraman ◽  
Erdem Demirkesen ◽  
M. Urgen
Keyword(s):  
Thin Film ◽  
Heat Treatment ◽  
Glass Ceramic ◽  
Glass Ceramics ◽  
Xrd Analysis ◽  
Crystallization Time ◽  
In Vitro Bioactivity ◽  
Treatment Procedures

In this study; in-vitro bioactivity characterization of machinable glass-ceramics having 85 wt% sodium mica (NaMg3AlSi3O10F2) and 15 wt% fluoroapatite has been carried out. Two different heat treatment procedures are applied to the machinable glass-ceramics. The first one is nucleation at 610°C for 2 hours and crystallization at 1000°C for 3 hours and the second is nucleation at 610°C for 2 hours and crystallization at 1000°C for 4 hours. It is observed that increasing the crystallization time to 4 hours resulted in the increasing the formation of hydroxyapatite layer on surface. According to the microstructural investigations, the morphology of the precipitated crystals are different. In addition, the speed of the precipitation of hydroxyapatite is higher in glass-ceramic B than A. Thin film XRD analysis supports these results.

In Vitro Bioactivity Characterization of Machinable Glass Ceramics Containing 85wt% Na-mica and 15wt% Fluorapatite

2006 ◽  
pp. 325-328
Author(s):  
Gultekin Göller ◽  
Ipek Akin ◽  
A. Kahraman ◽  
Erdem Demirkesen ◽  
M. Urgen
Keyword(s):  
Glass Ceramics ◽  
In Vitro Bioactivity

Preparation and Characterization of Sro-Na2O-Fe2O3-P2O5-SiO2 Ferrimagnetic Glass-Ceramics for Hyperthermia Application

2012 ◽  
Vol 581-582 ◽  
pp. 457-462
Author(s):  
Jian An Liu ◽  
Xue Na Yang ◽  
Mei Mei Zhang ◽  
Wen He
Keyword(s):  
Aqueous Solution ◽  
Magnetic Properties ◽  
Magnetic Property ◽  
Glass Ceramic ◽  
Room Temperature ◽  
Glass Ceramics ◽  
Vibrating Sample Magnetometer ◽  
Heat Treated ◽  
Molecular Scale

The ferrimagnetic glass-ceramic based on SrO-Na2O-Fe2O3-P2O5-SiO2 system was prepared for hyperthermia application using aqueous aolution-melt method. Using the aqueous solution solvent evaporation, we obtained the molecular-scale homogenously glass precursor. The precursor was completely melted in a lidded platinum crucible placed in an electric furnace at 1480°C for 1h and then annealed in a furnace at 550°C for 40min.The annealed glasses were heat treated at 1050°C for 2h to obtain the glass-ceramics. The crystallization of the glass systems with different component has been systematically investigated by using XRD. Room temperature magnetic property of the samples were investigated using a Vibrating Sample Magnetometer(VSM). The evolution of magnetic properties in these glasses as a function of P2O5 quality concentration was discussed.

scholarly journals Characterisation of the surface structure and bioactivity of glass and glass ceramics using surface topography

2012 ◽  
Vol 10 (6) ◽  
pp. 1890-1898 ◽  
Author(s):  
Gabriela Lutišanová ◽  
Martin Palou ◽  
Milan Mikula ◽  
Jana Kozánková
Keyword(s):  
Surface Structure ◽  
Surface Topography ◽  
Body Fluid ◽  
Glass Ceramics ◽  
Apatite Layer ◽  
In Vitro Bioactivity ◽  
Ceramic Samples ◽  
Melting Technique ◽  
The Relationship

AbstractThe present paper reports the results of the relationship between the surface topography, microstructure and the in vitro bioactivity of samples with and without fluorapatite content in simulated body fluid. Glasses and glass ceramics belonging to the Li2O-SiO2-CaO-P2O5-CaF2 system were prepared by using conventional melting technique following by heat treatment to obtain glass ceramics. This current study demonstrates the benefits of combining two microscopic methods for better investigation of the surface structure. The formation of apatite layer on the surface and the increase in surface roughness proved that the glasses and glass ceramics with bioactive fluorapatite content could satisfy to the requirements for biomaterial applications. The results also showed that the roughness of apatite layer formed after immersion in body fluid on the surface of glasses with fluorapatite was more pronounced than that of equivalent glass ceramic samples cured under the same conditions.

In Vitro Bioactivity Characterization of K-Mica-Fluorapatite Based Glass Ceramics Containing Varying Amount of TiO2 Addition

2006 ◽  
Vol 309-311 ◽  
pp. 321-324 ◽  
Author(s):  
Gültekin Göller ◽  
Ipek Akin ◽  
Niyazi Eruslu ◽  
E.S. Kayali
Keyword(s):  
Glass Ceramics ◽  
Weight Ratio ◽  
Xrd Analysis ◽  
Nucleating Agent ◽  
Ftir Analysis ◽  
Layer Formation ◽  
In Vitro Bioactivity ◽  
Second Stage

The purpose of this study is to investigate the crystallization behavior and in-vitro bioactivity character of glass ceramics having 3:7 weight ratio of flourapatite (Ca5(PO4)3F) to potassium mica (K2Mg3AlSi3O10F2) as a function of titania addition, and compare the morphology of hydroxycarbonateapatite (HCA) layer formation depending on titania addition on ceramic composition. It is observed from microstructural investigations that there is no morphology change occurred on precipitated HCA layer depending on nucleating agent in glass-ceramics. TF-XRD analysis indicates that after precipitation of initial particulates, crystallization proceeds and crystallization of precipitated HCA phase increases by increasing the time. It is observed that Ca, P ion variation in solution has two stage in terms of precipitation’ first stage represents formation of amorphous HCA and the second stage is related with crystallization. FTIR analysis strongly supports TF-XRD analysis as well.

IN-VITRO BIOACTIVITY EVALUATION OF K2O-SUBSTITUTED Na2O-CaO-P2O5-SiO2 GLASS BIOCERAMICS

2018 ◽  
Vol 25 (05) ◽  
pp. 1850104
Author(s):  
REHANA ZIA ◽  
MADEEHA RIAZ ◽  
AYESHA ASGHAR ◽  
TOUSIF HUSSAIN
Keyword(s):  
Body Fluid ◽  
Glass Ceramics ◽  
Proper Function ◽  
Processing Temperature ◽  
In Vitro Bioactivity ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
X Ray ◽  
Ceramic Samples

In the present work, the effect of K2O/Na2O substitution on the bioactivity of Na2O-CaO-P2O5-SiO2 ceramics prepared by solid-state method was studied. Ceramics-based bioactive implants are economical; they require low processing temperature and are more bioactive when compared with glasses, glass ceramics and composites. K2O is known to control proper function of cells and stimulate bone formation process. The hydroxyapatite layer developed on the surface of samples after soaking in stimulated body fluid solution was studied by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy and atomic absorption spectroscopy. The results showed an increase in the bioactivity of the samples as Na2O was partially replaced with K2O. The addition of K2O enhanced the apatite-forming ability of the ceramic samples and makes it suitable for filling defects and fracture in bones.

Synthesis of Glasses and Glass-Ceramics of the System Diopside - Fluorapatite and Characterization of Their in Vitro Bioactivity

MRS Advances ◽  
2017 ◽  
Vol 2 (61) ◽  
pp. 3845-3850
Author(s):  
Jorge López-Cuevas ◽  
Juan C. Rendón-Angeles ◽  
José L. Rodríguez-Galicia ◽  
Carlos A. Gutiérrez-Chavarría
Keyword(s):  
Structural Changes ◽  
Glass Ceramics ◽  
Inhibitory Effect ◽  
Molar Ratio ◽  
Isothermal Treatment ◽  
In Vitro Bioactivity ◽  
X Ray Diffraction ◽  
D 20

AbstractGlasses and glass-ceramics of the system Diopside [D, CaMgSi2O6] - Fluorapatite [FAp, Ca5(PO4)3F] were synthesized and characterized. The studied theoretical phase compositions were (wt%): 1) 70% D-30% FAp, 2) 60% D-40% FAp and 3) 80% D-20% FAp. The glass-ceramics were synthesized by isothermal treatment of the corresponding parent glasses at either 800, 900 or 1000 °C, with holding times of either 30 min, 2 h or 5 h at high temperature. The in vitro bioactivities of all materials were tested in Kokubo’s Simulated Body Fluid (SBF), for 21 days at pH = 7.4 and 37 °C. All materials were characterized by X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM/EDS). In all cases, the in vitro bioactivity increased with decreasing crystallization degree in the materials, which was likely due to an inhibitory effect of the structural changes occurring during thermal treatment of the glasses. This was more accentuated for long thermal treatments. After 21 days of soaking in the SBF, an apatite-like surface layer, with a Ca/P molar ratio close to 1.67, was formed in the case of the parent glass of composition 2. This was attributed to an enhancing effect of so-called “phase separation” phenomenon that took place during the synthesis of that particular glass. Lastly, the MgO content of the glasses made no clear difference on their in vitro bioactivity.

scholarly journals Quenched/unquenched nano bioactive glass-ceramics: Synthesis and in vitro bioactivity evaluation in Ringer’s solution with BSA

2013 ◽  
Vol 19 (2) ◽  
pp. 231-239 ◽  
Author(s):  
Nima Nabian ◽  
Maedeh Delavar ◽  
Mahmood Rabiee ◽  
Mohsen Jahanshahi
Keyword(s):  
Electron Microscope ◽  
Bioactive Glass ◽  
Glass Ceramic ◽  
Sol Gel ◽  
Glass Ceramics ◽  
Apatite Formation ◽  
In Vitro Bioactivity ◽  
Sem Images ◽  
Transmission Electron

The paper reports the first attempt at changing cooling treatment of synthesizing method in order to investigate its effect on the physical properties of sol-gel derived nano bioactive glass-ceramic in the system 58SiO2-33CaO-9P2O5 (wt.%). We hypothesized that the method of cooling may affect the properties of nano bioactive glass-ceramic. To test this hypothesis, two different method of cooling treatment was applied after calcinations in synthesizing method. Both quenched and unquenched nano bioactive glass-ceramics were soaked in Ringer?s solution with bovine serum albumin (BSA) for bioactivity evaluation. The obtained samples were analyzed for their composition, crystalinity and morphology through X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), surface electron microscope (SEM) and transmission electron microscope (TEM). The SEM images showed that the morphology of nano bioactive glass-ceramics was completely changed by quenching process. Results of in vitro bioactivity evaluation revealed that the unquenched attains faster apatite formation ability than the quenched sample. Other properties of these two morphologically different nano bioactive glass-ceramics were strongly discussed.

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