Comparative Study of Calcium Silicate Bulk Systems Produced by Different Methods

Sinkó, Katalin; Meiszterics, Anikó; Rosta, L.

doi:10.1007/2882_2008_094

Cited by 4 publications

(8 citation statements)

References 26 publications

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“…However, recent studies have shown it is possible to produce smaller particles in the nanoscale size range which has compositional homogeneity of the CaOSiO 2 groups using a sol–gel process at a lower reaction temperature 2–4, 9, 12–14. Gou and Chang prepared β‐and γ‐Ca 2 SiO 4 powders using a sol–gel method, followed by hydrothermal processing 2.…”

Section: Introductionmentioning

confidence: 99%

A synthesis route to nanoparticle dicalcium silicate for biomaterials research

2011

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Dicalcium silicate (Ca₂ SiO₄) has been reported as an interesting candidate for biomaterials use due to its attractive bioactive properties. Here, we report on how dicalcium silicate was prepared by a sol-gel route using calcium nitrate tetrahydrate and tetraorthosilicate as the precursors chemicals for CaO and SiO₂ , respectively. The synthesized powders were characterized using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) method, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). High purity dicalcium silicate at a CaO/SiO₂ molar ratio of 2:1 could be formed by the sol-gel method without a washing process and was then calcined at 800°C. The effects of the molar ratio of CaO/SiO₂ , the washing process, and the calcination temperature have been shown to affect the purity, the formation, and the particle size of the nanoparticles, which have been investigated and discussed.

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Section: Introductionmentioning

confidence: 99%

A synthesis route to nanoparticle dicalcium silicate for biomaterials research

2011

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“…The gelation of starting organic solution (1 h at base and 24 h at acid catalysis), the aging (24 h, acetic acid catalysis) as well as the drying processes (24 h, NH 3 catalysis) was performed at 80 °C. 12,13 The experiments of the heat treatment were conducted in the range of 100-1000 °C (2 h).…”

Section: Introductionmentioning

confidence: 99%

Structural Characterization of Gel-Derived Calcium Silicate Systems

et al. 2010

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The main aim of this study is to synthesize calcium silicate ceramics that exhibit suitable properties to be used for biomedical applications. In the present work, attention was paid to the understanding of processing-structure relationships. A particular effort was made to clarify the identification of Ca-O-Si bonds by means of spectroscopy. The calcium silicate systems were prepared via a sol-gel route, varying the chemical compositions, the catalyst concentration, and the temperature and time of aging and heat treatment. The processes and the phases evolved during the sol-gel procedure were determined. The bond systems were investigated by Fourier transform infrared (FTIR) and (29)Si magic angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy and the aggregate structures by scanning electron microscopy (SEM), small-angle neutron scattering (SANS), small-angle X-ray scattering (SAXS), wide-angle X-ray scattering (WAXS), and X-ray diffraction (XRD) measurements.

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“…The calcium silicate ceramic systems were synthesized by acid-or base-catalyzed sol-gel routes [17,18]. A Ca-and Si-containing colloid (gel or sol) systems form in the first step of the sol-gel method.…”

Section: Resultsmentioning

confidence: 99%

“…The main reactions of the gelation are the hydrolysis and condensation. The hydrolysis and condensation reactions require acid or base catalysis [17,18].…”

Section: Resultsmentioning

confidence: 99%

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Catalysis, nanostructure and macroscopic property triangle in bioactive calcium-containing ceramic systems

Meiszterics

Havancsák

Sinkó

2013

Materials Science and Engineering: C

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Calcium silicate ceramics are intended for application as long-term implant materials. In the present work, attention was paid to understand the correlations between the nanostructure (aggregate size, crystallinity, porosity) and the macroscopic properties (solubility in water and simulated body fluids, SBF; hardness) varying the chemical composition. Varying the catalyst (from a base to various acids) during the chemical synthesis was shown to significantly impact on the pore size, crystallinity and mechanical properties. The basic catalyst yields the ceramics with the highest mechanical strength. Ammonia used in 1.0 or 10.0 molar ratio results in bulk ceramics with parameters required for a biomedical application, good hardness (180-200 HV) and low solubility (1-3%) in water and in SBF. The fine porosity (~50 nm) and homogeneous amorphous structure induce good mechanical character.

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Comparative Study of Calcium Silicate Bulk Systems Produced by Different Methods

Cited by 4 publications

References 26 publications

A synthesis route to nanoparticle dicalcium silicate for biomaterials research

A synthesis route to nanoparticle dicalcium silicate for biomaterials research

Structural Characterization of Gel-Derived Calcium Silicate Systems

Catalysis, nanostructure and macroscopic property triangle in bioactive calcium-containing ceramic systems

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