Hydroxyapatite nanopowders prepared in the presence of zirconium ions

Lukić, Miodrag J.; Veselinović, Ljiljana; Stevanović, Magdalena; Nunić, Jana; Dražić, Goran; Marković, Smilja; Uskoković, Dragan

doi:10.1016/j.matlet.2014.02.072

Cited by 32 publications

(6 citation statements)

References 12 publications

(16 reference statements)

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“…The splitted weak bands 400–525 cm −1 could be assigned to the zirconia; the bands at 427.5 cm −1 at x = 0.2 and 525.1 cm −1 at x = 1.0 could be attributed to Zr–O-Zr stretching mode283637. Considerably, the small amount of doped zirconia, makes it difficult to differentiate between the bands attributed to HAP and ZrO 2 as observed from FTIR spectra.…”

Section: Resultsmentioning

confidence: 98%

“…The recognizable bands were detected as follows: At x = 0.0, the spectra shows distinct vibrational bands at 602.5 and 562.8 cm −1 , attributed to the ν 4 vibrational mode, while the weak intensity band at 467.9 cm −1 as a component of the ν 2 mode corresponds to P-O bending 33 34 35 . The band at 525.1 cm −1 that appeared only at x = 1.0 is assigned for Zr–O stretching vibration mode 28 36 37 .…”

Section: Resultsmentioning

confidence: 99%

“…However, M. J. Lukić et al .have synthesized HAP nano powder in the presence of zirconium (Zr 4+ ) ions, keeping (Ca + Zr)/P = 1.67. The authors reported that the phase transformations could be tailored by adjusting zirconium content 28 29 .…”

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confidence: 99%

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Physico-mechanical and morphological features of zirconia substituted hydroxyapatite nano crystals

Mansour

El-Dek

Ahmed

2017

Sci Rep

138

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Zirconia doped Hydroxyapatite (HAP) nanocrystals [Ca10(PO4)6−x(ZrO2)x(OH)2]; (0 ≤ x ≤ 1 step 0.2) were synthesized using simple low cost facile method. The crystalline phases were examined by X-ray diffraction (XRD). The crystallinity percentage decreased with increasing zirconia content for the as-synthesized samples. The existence of zirconia as secondary phase on the grain boundaries; as observed from scanning electron micrographs (FESEM); resulted in negative values of microstrain. The crystallite size was computed and the results showed that it increased with increasing annealing temperature. Thermo-gravimetric analysis (TGA) assured the thermal stability of the nano crystals over the temperature from room up to 1200 °C depending on the zirconia content. The corrosion rate was found to decrease around 25 times with increasing zirconia content from x = 0.0 to 1.0. Microhardness displayed both compositional and temperature dependence. For the sample (x = 0.6), annealed at 1200 °C, the former increased up to 1.2 times its original value (x = 0.0).

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

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Physico-mechanical and morphological features of zirconia substituted hydroxyapatite nano crystals

Mansour

El-Dek

Ahmed

2017

Sci Rep

138

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“…27 The chemical precipitation method was also used for the preparation of hydroxyapatite nano-powders in the presence of different concentrations of zirconium ions. 28 HAp/ZrO 2 composites had improved properties, especially mechanical, while biocompatibility was not impaired, when compared to pure HAp. Non-isothermal sintering enables to suppress the reaction between hydroxyapatite and zirconia by limiting it to only calcium phosphates.…”

Section: Full Density Nanostructured Calcium Phosphate and Functionalmentioning

confidence: 93%

Molecular designing of nanoparticles and functional materials

Ignjatović

Marković

Jugović

et al. 2017

JSCS

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The interdisciplinary research team implemented the program titled "Molecular designing of nanoparticles with controlled morphological and physicochemical characteristics and functional materials based on them" (MODENAFUNA), between 2011 and 2016, gaining new knowledge significant to the further improvement of nanomaterials and nanotechnologies. It gathered under its umbrella six main interrelated topics pertaining to the design and control of morphological and physicochemical properties of nanoparticles and functional material based on them using new methods of synthesis and processing: 1) inorganic nanoparticles, 2) cathode materials for lithium-ion batteries, 3) functional ceramics with improved electrical and optical properties, 4) full density nanostructured calcium phosphate and functionally-graded materials, 5) nano-calcium phosphate in bone tissue engineering and 6) biodegradable micro-and nano-particles for the controlled delivery of medicaments.

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“…Generally, achieving a certain level of multifunctionality within HAp-based bioceramics for specific purposes could make a progress in applications of HAp-based materials. Lithium iron phosphate (LFP) is interesting as a sintering aid for HAp, since it melts around 960 -1000 °C in inert atmosphere [16], which is usually in the intermediate stage of HAp sintering regardless its stoichiometry or synthesis method [17][18][19]. Exploitation of these findings accompanied with an appropriate sintering cycle, could induce changes in the HAp sintering behaviour through the formation of liquid phase.…”

Section: Introductionmentioning

confidence: 99%

Inert atmosphere processing of hydroxyapatite in the presence of lithium iron phosphate

Lukić

Kuzmanović

Sezen

et al. 2018

Journal of the European Ceramic Society

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The present study describes sintering behaviour of hydroxyapatite (HAp) upon addition of lithium iron phosphate (LFP) (1-10 wt. %) system in inert (Ar) atmosphere. The interaction between materials and melting of LFP influenced early and intermediate stages of HAp sintering, shifting the densification curves towards low-temperature side. Analysis of densification process indicated significant differences upon LFP addition. The reaction mechanism that assumes the initial interaction between phosphates from LFP and calcium from HAp was proposed, generating calcium vacancies and contributing to HAp densification. Cross-sections of sintered samples showed changes in microstructural properties, with uniform atomic distribution and presence of Li 2 Fe 3 O 4 spherical inclusions (200 nm) located at grain boundaries of calcium phosphate matrix. The Rietveld refinement analysis indicated changes in structural and microstructural parameters like crystallite size, anisotropy and microstructural strain of HAp upon LFP addition. Mechanical characterisation indicated improvements in fracture behaviour upon LFP addition.

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Hydroxyapatite nanopowders prepared in the presence of zirconium ions

Cited by 32 publications

References 12 publications

Physico-mechanical and morphological features of zirconia substituted hydroxyapatite nano crystals

Physico-mechanical and morphological features of zirconia substituted hydroxyapatite nano crystals

Molecular designing of nanoparticles and functional materials

Inert atmosphere processing of hydroxyapatite in the presence of lithium iron phosphate

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