Enhanced sinterability and in vitro bioactivity of diopside through fluoride doping

Baghjeghaz, M. Jafari; Salahinejad, E.

doi:10.1016/j.ceramint.2016.12.144

Cited by 33 publications

(8 citation statements)

References 39 publications

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“…The absorbance bands positioned at 445 cm −1 , 470 cm −1 and 563 cm −1 are assigned to the bending vibrations of PO 4 3− group whereas the peaks at 1012 cm −1 and 1056 cm −1 are attributed to the stretching modes of the phosphate functional group. The bands at 1444 cm −1 and 1636 cm −1 indicates the presence of asymmetric stretching of CO 3 2− and OH − groups . After bioactivity investigation, the observation of Si−O and O−Si‐O bond is due to the mixing of bulk material with deposited HAp on the surface when antecedently bioactivity studies for FT‐IR investigation is carried out following the grounding of the scaffold into powder.…”

Section: Resultsmentioning

confidence: 99%

“…The bands at 1444 cm À 1 and 1636 cm À 1 indicates the presence of asymmetric stretching of CO 3 2À and OH À groups. [36,37] After bioactivity investigation, the observation of SiÀ O and OÀ Si-O bond is due to the mixing of bulk material with deposited HAp on the surface when antecedently bioactivity studies for FT-IR investigation is carried out following the grounding of the scaffold into powder. From the above functional group identification, it has been proposed that hydroxyapatite deposition occurred on the surface.…”

Section: Apatite Deposition Abilitymentioning

confidence: 99%

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Synthesis, Bioactivity and Mechanical Stability of Mg/Ca Silicate Biocomposites Developed for Tissue Engineering Applications

Venkatraman

Swamiappan

2019

ChemistrySelect

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Bioceramics used in hard tissue engineering applications should primarily meet the criteria of mechanical strength and apatite mineralisation of natural bone. In such a scenario, designing of bioceramic composites is inevitable as calcium silicates possess good apatite deposition ability and magnesium silicates show excellent mechanical stability. The present study investigates the influence of calcium (Ca) and magnesium (Mg) ions of the bioceramics on bioactivity and mechanical strength. Binary silicates such as wollastonite (CaSiO3), enstatite (MgSiO3) and forsterite (Mg2SiO4) were prepared by sol‐gel combustion technique. Functional group identification and phase formation of the silicate materials were analysed by FT‐IR and X‐ray diffraction studies respectively. Furthermore, apatite mineralisation ability and mechanical strength of wollastonite were evaluated. Influence of wollastonite on the bioactivity of both enstatite and forsterite was also investigated. The obtained results conferred that the wollastonite possesses good apatite formation ability, moderate resorbability and low mechanical strength. The composites of wollastonite show improvement in the enstatite with respect to bioactivity and in forsterite with respect to superior mechanical properties.

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Section: Resultsmentioning

confidence: 99%

Section: Apatite Deposition Abilitymentioning

confidence: 99%

Synthesis, Bioactivity and Mechanical Stability of Mg/Ca Silicate Biocomposites Developed for Tissue Engineering Applications

Venkatraman

Swamiappan

2019

ChemistrySelect

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“…It can be seen that copper doping slightly enhanced the intensity of the diffraction peaks which are related to crystallinity and crystallite size. This may be that copper acted as a flux, lowering the sintering temperature of diopside; therefore, for the given sintering temperature of 1250 °C the crystallinity and grain size of the copperdoped samples was increased [29,30].…”

Section: Structural Characterization Of Scaffoldsmentioning

confidence: 99%

High performing additively manufactured bone scaffolds based on copper substituted diopside

Pang

Kamutzki

et al. 2022

Materials & Design

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“…The FTIR spectra of omphacite (e.g., in points 13, 16) can be identified by the strong modes at 964 cm −1 (ν Si-O) and 1064 cm −1 (νas Si-O-Si), as well as by the Si-O stretching weaker peaks at 785, 758, 740, and 719 cm −1 in all the FTIR spectra of diopside are due to albite [42], always co-present with diopside in this gem. The FTIR spectra of omphacite (e.g., in points 13, 16) can be identified by the strong modes at 964 cm −1 (ν Si-O) and 1064 cm −1 (νas Si-O-Si), as well as by the Si-O stretching The FTIR reflectance spectra of diopside (Figure 12a) show broad bands at 1094, 1006, and 970-964 cm −1 attributed to the characteristic Si-O stretching modes of the SiO 4 tetrahedron, while the sharp peak at 669 cm −1 and the other peak at 875-870 cm −1 are assigned to the non-bridging bending vibration of O-Si-O and non-bridging stretching mode of Si-O, respectively [39][40][41]. All the detected bands are in good agreement with the vibrations of the functional groups of diopside.…”

Section: Raman and Ftir Spectroscopymentioning

confidence: 99%

New Insights for Gem-Quality Mn-Bearing Diopside-Omphacite, Violane Variety, from Saint Marcel (Val D’Aosta, Italy): Its Trace Elements and Spectroscopic Characterization

et al. 2021

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This study proposes new data on the rare pyroxene, variety violane, sampled from its type locality, Praborna manganese deposit, near Saint Marcel (Val d’Aosta, Italy). Violane is very appreciated as a gemstone for its different hues of violet-blue color and is characterized by its diopsidic or omphacitic composition. To assess the possible causes of color, electron-probe microanalysis (EMPA) and laser-ablation inductively coupled plasma mass spectrometry (LA–ICP–MS) were used to establish the chemical composition. Raman and Fourier transform infrared (FTIR) spectroscopy, ideal for the non-destructive analysis, identified the different present phases directly on gemstone. Raman and FTIR spectra highlighted the presence, in the same sample, of diopside and omphacite showing almost inappreciable violet hue difference. The two minerals were easily differentiated by microprobe analyses and showed a compositional heterogeneity not linked to the different colors. The best way to detect the color-causing elements in microcrystalline violanes resulted in the analysis of trace elements and their quantification. An enrichment of Ti and Li characterizes darker violet omphacite and that of V and rare-earth elements (REE) the lilac-lavender or light violet-blue diopside. In general, our results led us to say that the color changes, previously proposed as due to Mn both in divalent and trivalent oxidation state, may be controlled by trace elements or by concentration of minor elements, such as Fe, and their oxidation state. REE patterns showed a negative anomaly of Ce that could be ascribed to the variation of the oxygen chemical potential occurring in the ore. The new data, combined with previous results, may provide new constrains on the processes that generated the Mn-rich deposit of Praborna.

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Enhanced sinterability and in vitro bioactivity of diopside through fluoride doping

Cited by 33 publications

References 39 publications

Synthesis, Bioactivity and Mechanical Stability of Mg/Ca Silicate Biocomposites Developed for Tissue Engineering Applications

Synthesis, Bioactivity and Mechanical Stability of Mg/Ca Silicate Biocomposites Developed for Tissue Engineering Applications

High performing additively manufactured bone scaffolds based on copper substituted diopside

New Insights for Gem-Quality Mn-Bearing Diopside-Omphacite, Violane Variety, from Saint Marcel (Val D’Aosta, Italy): Its Trace Elements and Spectroscopic Characterization

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