18-12-2012, 12:13 PM
Sol-gel combustion synthesis of Calcium Silicate Bioceramics
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Abstract
Wollastonite (CaSiO3) is a bioactive and biocompatible calcium silicate used in biomedical applications like implants used in clinical bone repair, regeneration materials and drug delivery system [1] . The sol-gel combustion method was employed to prepare wollastonite and calcium nitrate was taken as calcium source and tetraethyl ortho silicate as a source for silicate. The nitrate ions present in the calcium nitrate acts as an oxidizer and glycine was used as a fuel. The precursor was calcined at 9000c for 12h and the product was characterized by using powder X-ray Diffraction, Fourier - Transform Infrared spectroscopy and scanning electron microscopy. The phase formation of wollastonite was confirmed by powder XRD, functional groups of wollastonite was identified by FT-IR and topography, morphology of wollastonite was investigated by SEM
Introduction
A wide range of ceramic materials were used for biomedical applications
Calcium Silicates can be used in various medical applications such as implants used in clinical bone repair, regeneration materials and drug delivery system
Wollastonite (CaSiO3) has received considerable attention due to its good bioactivity and biocompatibility in recent years.
The bioactivity of the CaSiO3 was found by immersing it in SBF and found that hydroxyapatite is formed on the surface of the CaSiO3 after a short period of time[2].
Wollastonite can be prepared by various methods such as Co-precipitation, Hydrothermal, solution combustion method and sol-gel method.
Sol-gel combustion synthesis is an attractive technique due to its advantages such as low processing cost, energy efficiency and high percentage of yield.
Objective of the work
The aim of the present work is to synthesize the wollastonite (CaSiO3) by sol-gel combustion method using glycine as fuel/reductant and nitrate as an oxidant.
The pure phase of wollastonite was synthesized.
Result and Discussion
Powder X-ray Diffraction
The XRD pattern confirms the pure phase formation of wollastonite.
The crystallite size of wollastonite was calculated by using Scherer’s formula is 42.0nm
FT-IR
The FT-IR spectrum shows the characteristic peaks of the functional groups present in the wollastonite.
SEM
From the SEM image the agglomerated particles were observed and the particle size of the wollastonite was in the range of 200nm-600nm
[attachment=44138]
Abstract
Wollastonite (CaSiO3) is a bioactive and biocompatible calcium silicate used in biomedical applications like implants used in clinical bone repair, regeneration materials and drug delivery system [1] . The sol-gel combustion method was employed to prepare wollastonite and calcium nitrate was taken as calcium source and tetraethyl ortho silicate as a source for silicate. The nitrate ions present in the calcium nitrate acts as an oxidizer and glycine was used as a fuel. The precursor was calcined at 9000c for 12h and the product was characterized by using powder X-ray Diffraction, Fourier - Transform Infrared spectroscopy and scanning electron microscopy. The phase formation of wollastonite was confirmed by powder XRD, functional groups of wollastonite was identified by FT-IR and topography, morphology of wollastonite was investigated by SEM
Introduction
A wide range of ceramic materials were used for biomedical applications
Calcium Silicates can be used in various medical applications such as implants used in clinical bone repair, regeneration materials and drug delivery system
Wollastonite (CaSiO3) has received considerable attention due to its good bioactivity and biocompatibility in recent years.
The bioactivity of the CaSiO3 was found by immersing it in SBF and found that hydroxyapatite is formed on the surface of the CaSiO3 after a short period of time[2].
Wollastonite can be prepared by various methods such as Co-precipitation, Hydrothermal, solution combustion method and sol-gel method.
Sol-gel combustion synthesis is an attractive technique due to its advantages such as low processing cost, energy efficiency and high percentage of yield.
Objective of the work
The aim of the present work is to synthesize the wollastonite (CaSiO3) by sol-gel combustion method using glycine as fuel/reductant and nitrate as an oxidant.
The pure phase of wollastonite was synthesized.
Result and Discussion
Powder X-ray Diffraction
The XRD pattern confirms the pure phase formation of wollastonite.
The crystallite size of wollastonite was calculated by using Scherer’s formula is 42.0nm
FT-IR
The FT-IR spectrum shows the characteristic peaks of the functional groups present in the wollastonite.
SEM
From the SEM image the agglomerated particles were observed and the particle size of the wollastonite was in the range of 200nm-600nm