Optimization of Synthesis Process of Nano-Hydroxyapatite

Ledesma-Carrión, Dora Elena

doi:10.1007/978-981-10-0551-0_11

Cited by 3 publications

(4 citation statements)

References 11 publications

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“…The greater the complexity of the pattern increases, the most likely the formation intercavities and atomic size vacancies and defects in the composite. The results are compatible with the literature 31‐33 …”

Section: Resultssupporting

confidence: 93%

“…The results are compatible with the literature. [31][32][33] F I G U R E 5 Density of bovine derived hydroxyapatite (BHA) with respect to zirconmullite (ZM) addition at different sintering temperatures. The best fit line is drawn for each data set F I G U R E 6 Hardness of bovine derived hydroxyapatite (BHA) with respect to zirconmullite (ZM) (wt.%) at sintering temperatures.…”

Section: Xrd Resultsmentioning

confidence: 99%

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Effects of sintering and zirconmullite doping on nanostructural vacancies of bovine hydroxyapatite by positron techniques

et al. 2023

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In this study, the nanostructural vacancy behavior of bovine derived hydroxyapatite (BHA) doped with powder zirconmullite (ZM) contents of 5, 7.5, 10 and 12.5 wt.% were presented at sintering temperatures of 1000, 1100, 1200 and 1300°C. ZM‐doped BHA (ZM‐BHA) was characterized by X‐ray diffraction and positron annihilation lifetime spectroscopy (PALS). Density and hardness behavior were measured with respect to increasing sintering temperature. PALS results indicate that the longest lifetime component τ3 of ortho‐positronium (o‐Ps) localized at open spaces is attributed to the vacancy site and almost constant with the ZM contents and the sintering temperatures to have a mean value of 0.680 ns (corresponding to the radius of 0.997 nm). This average value is ascribed to the OH group defects along the main crystalline line. On the other hand, the o‐Ps intensity attributed to the number of vacancy sites increases almost linearly with ZM additives and sintering temperatures. The intensity is also related to the density and hardness of ZM‐BHA in terms of ZM contents.

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Section: Resultssupporting

confidence: 93%

Section: Xrd Resultsmentioning

confidence: 99%

Effects of sintering and zirconmullite doping on nanostructural vacancies of bovine hydroxyapatite by positron techniques

et al. 2023

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“…Nanometric and stoichiometric hydroxyapatite was prepared by wet via [6]. Later, TiO 2 anatase was added.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Effect of Anatase on Nano- Hydroxyapatite

Ledesma-Carrión¹

2016

J Bioengineer & Biomedical Sci

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The main bone substitute is hydroxyapatite either mineral or synthetic. Synthetic hydroxyapatite is produced by various methods such as, sol-gel, mechanochemical, hydrothermal, sonochemical, ceramic (wet and dry roads, routes through cements of calcium phosphates and route using emulsions-microemulsions), and hydrolysis. Hydroxyapatite obtained by wet via has features from micro to nano. It has been reported that adding titania mechanical properties of hydroxyapatite improve. In this study only the experimental evidence is presented. The objective of this study was to analyze the effect of anatase in synthetic hydroxyapatite obtained by co-precipitators. Powders were subjected to uniaxial and isostatic cold pressing to form pills. Later pills were sintered. The characterization of the material includes several techniques. It was compared with each of the different percentages of anatase 0.1, 1.5, 1, 3, 5, 7 and 10. The results show the existence of an optimum percentage by which the mechanical properties surpass others, maximum of hardness before immersed it in simulated body fluid with 7%. The explanation of this optimum is the presence of calcium titanate because of titania diffuses efficiently in the network hydroxyapatite. Characterization and Effect of Anatase on Nano-Hydroxyapatite

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“…A rod-like morphology with particle size of 20-50 nm × 100-200 nm, particle average size of 175.9 nm with 1-modal, pore radii of 1.22 nm and stoichiometric and anisotropic hydroxyapatite was prepared by reacting calcium hydroxide and a phosphoric acid solution. Hydroxyapatite powder [3] was treated with heat at 680 º C during 3 h in Ar atmosphere (HAcc).…”

Section: Synthesismentioning

confidence: 99%

Hardness and Roughness by AFM-HR Analysis of Nano-Hydroxyapatite

Ledesma-Carrión¹

2015

JMSE-B

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Stoichiometric nano-hydroxyapatite is synthesized and compacted by UP (Uniaxial pressing) and CIP (Cold isostatic pressing). It is sintered (S) and subsequently is immersed in SBF (Synthetic body fluid). Hardness and roughness are analyzed in each part of process. The relationship between hardness and roughness is proportional after UP. While in the CIP and sintering the relationship is symmetric with a maximum. After immersion there is no clear functional relationship. Roughness changes at each stage of the process are -13.3% (UP → CIP), 22.10% (CIP → S) and -61.5% (S → SBF), respectively. Analogously, for area particle: 405.60%, 120.20% and -99.8%.

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Optimization of Synthesis Process of Nano-Hydroxyapatite

Cited by 3 publications

References 11 publications

Effects of sintering and zirconmullite doping on nanostructural vacancies of bovine hydroxyapatite by positron techniques

Effects of sintering and zirconmullite doping on nanostructural vacancies of bovine hydroxyapatite by positron techniques

Characterization and Effect of Anatase on Nano- Hydroxyapatite

Hardness and Roughness by AFM-HR Analysis of Nano-Hydroxyapatite

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