A study on mechanochemical behavior of CaO–P2O5–CaF2–ZrO2 system to produce fluorapatite–zirconia composite nanopowders

Fahami, Abbas; Ebrahimi‐Kahrizsangi, Reza; Khazraei, Armin; Yazdani, Mehrdad; Kajbafzadeh, Mohammad Javad

doi:10.1016/j.powtec.2013.03.034

Cited by 14 publications

(5 citation statements)

References 33 publications

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“…Generally speaking, the SEM micrographs of all the samples show that plenty of significantly fine particles are interconnected and form irregular agglomerated clusters. It should be noted that the fine and homogeneous microstructure is the initial important factor for improvement in mechanical properties and biomedical performance of bulk ceramics [34,35].…”

Section: Sem and Eds Evaluationmentioning

confidence: 99%

Effect of different sol-gel synthesis processes on microstructural and morphological characteristics of hydroxyapatite-bioactive glass composite nanopowders

et al. 2014

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The aim of this work was to study the influence of the different synthesis processes on microstructural and morphological characteristics and distribution of hydroxyapatite-bioactive glass (HAp-BG) composite nanopowders obtained by sol-gel method. HAp-BG composite nanopowders with 20 wt% bioactive glass were prepared using a sol-gel method via four routes: (I) mixing the prepared HAp solution with BG solution before aging time; (II) mixing the prepared BG solution with the prepared HAp gel after gelation; (III) mixing the calcined BG nanopowders with the prepared HAp solution; and (IV) mixing the two prepared calcined nanopowders by mechanochemical activation. The prepared nanopowders were evaluated and studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectrometer (EDS), Fourier transform infrared (FTIR), transmission electron diffraction (TEM) and Brunauer-Emmet-Teller (BET) method to investigate the phase structure, microstructure and morphology, functional groups, and the size and distribution of nanopowders. Results indicated that morphology, crystallinity, crystallite size and specific surface area (SSA) of the powders are highly correspondent to the process and type of synthesis method. These findings suggest that the modified sol-gel derived HAp-BG composite nanopowders are expected to efficiently provide a possibility to produce a good candidate to use for fabrication of a bulk nanostructured HAp-BG composite for bone tissue engineering.

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Section: Sem and Eds Evaluationmentioning

confidence: 99%

Effect of different sol-gel synthesis processes on microstructural and morphological characteristics of hydroxyapatite-bioactive glass composite nanopowders

et al. 2014

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“…In order to determine the reactivity of the reactants and the sequences of formation of the intermediate compounds, we investigated three binary and four ternary milling routes ending up with the FA nanostructure. The data obtained were more detailed than information given by previous authors [23][24][25][26][27] and could assist us to propose a more comprehensive explanation for the FA formation process.…”

Section: Introductionmentioning

confidence: 74%

Mechanism of Nanostructured Fluorapatite Formation from CaO, CaF₂ and P₂O₅ Precursors by Mechanochemical Synthesis

Mofrad

Sadrnezhaad

Khaki

2018

Progress in Reaction Kinetics and Mechanism

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We determined the mechanism of mechanochemical synthesis of fluorapatite from CaO, CaF2 and P2O5 by characterisation of the intermediate compounds. We used atomic absorption spectroscopy, X-ray diffraction, field emission scanning electron microscopy, FTIR spectroscopy and transmission electron microscopy to find the transitional compounds. Investigation of the binary and ternary powder mixtures revealed the appearance of H3PO4, Ca(OH)2, Ca2P2O7 and CaCO3 as the intermediate compounds. At early stages of the milling, conversions of P2O5 to H3PO4 and CaO to Ca(OH)2 occurred in the wet atmosphere. Later, a combination of Ca(OH)2 and H3PO4 formed C a2P2O7 while the unreacted CaO was converted to CaCO3 by CO2 of the ambient atmosphere. Spherical crystalline Ca10 (PO4)6F2 particles formed after 48 hours of milling due to the reaction between Ca2P2O7, CaCO3 and CaF2.

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“…Nasiri-Tabrizi et al focused on fluorapatite (FAP) (Ca 10 (PO 4 ) 6 F 2 ) and observed changes in crystal size with milling time. They found that the crystal size of FAP increased to approximately 90 nm after 50 min of milling, reached around 55 nm after 100 min, and eventually reduced to 35 nm after 300 min of milling [141]. The milling process also induced lattice strain, which increased from 0.2% to approximately 0.5% over 300 min.…”

Section: Economic Feasibility Of the Mechanochemical Hap Synthesis Me...mentioning

confidence: 99%

Nutrient-Doped Hydroxyapatite: Structure, Synthesis and Properties

Ammar,

Ashraf,

Baltrusaitis

2023

Ceramics

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Complex inorganic powders based on calcium phosphates have found a plethora of practical applications. Of particular interest are the CaO-P2O5 system-based multi-component material powders and granules as the source of major- and micronutrients for the plants. The emerging strategy is to use nano fertilizers based on hydroxyapatite (HAP) for phosphorus and other nutrient delivery. The doping of micronutrients into HAP structure presents an interesting challenge in obtaining specific phase compositions of these calcium phosphates. Various techniques, including mechanochemical synthesis, have been employed to fabricate doped HAP. Mechanochemical synthesis is of particular interest in this review since it presents a relatively simple, scalable, and cost-effective method of calcium phosphate powder processing. The method involves the use of mechanical force to promote chemical reactions and create nanometric powders. This technique has been successfully applied to produce HAP nanoparticles alone, and HAP doped with other elements, such as zinc and magnesium. Nanofertilizers developed through mechanochemical synthesis can offer several advantages over conventional fertilizers. Their nanoscale size allows for rapid absorption and controlled release of nutrients, which leads to improved nutrient uptake efficiency by plants. Furthermore, the tailored properties of HAP-based nano fertilizers, such as controlled porosity and degradation levels, contribute to their effectiveness in providing plant nutrition.

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A study on mechanochemical behavior of CaO–P2O5–CaF2–ZrO2 system to produce fluorapatite–zirconia composite nanopowders

Cited by 14 publications

References 33 publications

Effect of different sol-gel synthesis processes on microstructural and morphological characteristics of hydroxyapatite-bioactive glass composite nanopowders

Effect of different sol-gel synthesis processes on microstructural and morphological characteristics of hydroxyapatite-bioactive glass composite nanopowders

Mechanism of Nanostructured Fluorapatite Formation from CaO, CaF₂ and P₂O₅ Precursors by Mechanochemical Synthesis

Nutrient-Doped Hydroxyapatite: Structure, Synthesis and Properties

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A study on mechanochemical behavior of CaO–P2O5–CaF2–ZrO2 system to produce fluorapatite–zirconia composite nanopowders

Cited by 14 publications

References 33 publications

Effect of different sol-gel synthesis processes on microstructural and morphological characteristics of hydroxyapatite-bioactive glass composite nanopowders

Effect of different sol-gel synthesis processes on microstructural and morphological characteristics of hydroxyapatite-bioactive glass composite nanopowders

Mechanism of Nanostructured Fluorapatite Formation from CaO, CaF2 and P2O5 Precursors by Mechanochemical Synthesis

Nutrient-Doped Hydroxyapatite: Structure, Synthesis and Properties

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Mechanism of Nanostructured Fluorapatite Formation from CaO, CaF₂ and P₂O₅ Precursors by Mechanochemical Synthesis