Preparation and characterization of nano-hydroxyapatite powder using sol-gel technique

Sanosh, K.P.; Chu, Min-Cheol; Balakrishnan, Avinash; Kim, T. N.; Cho, Seong-Jai

doi:10.1007/s12034-009-0069-x

Cited by 135 publications

(75 citation statements)

References 33 publications

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“…1415 and 1450 cm -1 are characteristic for type B or AB [23]. The presence of CO 3 2-may improve the bioactivity of HAP rather than being a cause of concern [24].…”

Section: Resultsmentioning

confidence: 99%

Low Crystallinity Nanohydroxyapatite Prepared at Room Temperature

Mocanu¹,

Balint²,

Garbo³

et al. 2017

Studia UBB Chemia

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ABSTRACT. In order to obtain a low crystalline nanohydrxyapatite (HAP), suitable for biomedical application, a new synthesis procedure was developed, based on the aqueous precipitation method, at room temperature, without any additives. Accordingly, lyophilized HAP powders, both calcined and non calcined, were prepared, and characterized by XRD, TEM and AFM imaging, FTIR spectroscopy, zeta potential and BET measurements. The results confirmed HAP as the only phase present. The high porosity of this nanomaterial is attained. The nanoparticle size and shape as well as the crystallinity degree of the obtained HAP samples were also determined.

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“…1415 and 1450 cm -1 are characteristic for type B or AB [23]. The presence of CO 3 2-may improve the bioactivity of HAP rather than being a cause of concern [24].…”

Section: Resultsmentioning

confidence: 99%

Low Crystallinity Nanohydroxyapatite Prepared at Room Temperature

Mocanu¹,

Balint²,

Garbo³

et al. 2017

Studia UBB Chemia

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“…The mechanical properties could be improved by improving the methods of filler preparation. 20 Improving the surface treatment and loading mode of the na-HA filler warrant further investigation. Moreover, due to the excellent biocompatibility of the na-HA, the higher the HA content, the better will be the bioactivity of the composites.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the mechanical properties of a low-shrinkage liquid crystalline matrix combined with nano-hydroxyapatite

Liu

Xiao²,

Mo³

et al. 2011

IJN

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The objective of this study was to investigate the mechanical properties of a low-shrinkage acrylate liquid crystalline resin matrix (ALCRM), (4-3-(acryloyloxy)-2-hydroxypropoxy) phenyl 4-(3-(acryloyloxy)-2-hydroxypropoxy) benzoate, combined with nano-hydroxyapatite (na-HA). The ALCRM monomer and diluent monomer triethylene glycol dimethacrylate (TEGDMA) were mixed at a mass ratio of 7:3 to prepare the resin matrix. The volume shrinkage of the ALCRM/TEGDMA and the traditional resin matrix Bis-GMA (2, 2-bis [4-(3-methacryloxy-2-hydroxypropoxy) phenyl] propane)/TEGDMA were measured. Then 20%, 30%, and 40% na-HA were added to ALCRM/TEGDMA and Bis-GMA/TEGDMA, respectively. Compressive strength (CS) and Vickers hardness (VHN) were tested to identify mechanical properties of the composites. The volume shrinkage of the ALCRM/TEGDMA was 3.60% ± 0.36%, which was lower than that of the traditional resin matrix. Moreover, with the same amount of na-HA filler, the mechanical properties of the ALCRM-based composites were superior to those of Bis-GMA-based composites. ALCRM-based composites exhibited the highest CS and VHN values when the filler content was 30%. These results indicate that the low-shrinkage liquid crystalline resin matrix has strong mechanical properties after incorporating the na-HA. The experimental ALCRM-based composites have promising potential for the development of novel low-shrinkage dental resins with strong mechanical properties.

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“…A step scan of 0.02°and scan speed of 0.5°/min was employed. The crys-tallite size of the synthesized powder (upon heat treatment) was measured using Scherrer equation by taking the highest peak observed at 36.4°, (2 1 1) plane, to obtain the Full-Width Half Maximum value 13) with three samples. Five samples for each parameter were used to measure the bulk density of forsterite by water immersion technique using Archimedes principle.…”

Section: Characterization Of Forsterite Ceramicsmentioning

confidence: 99%

Study on the effects of milling time and sintering temperature on the sinterability of forsterite (Mg<sub>2</sub>SiO<sub>4</sub>)

Tan

Ramesh

et al. 2015

J. Ceram. Soc. Japan

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Synthesis of phase-pure forsterite (Mg 2 SiO 4 ) is a challenging process that requires multiple steps including careful heat treatment and ball milling. In this work, the effects of temperature, time and ball milling duration in synthesizing forsterite powder were investigated. A comparison of 1000 and 1200°C heat treatment temperature with 1 min, 1, and 2 h of holding time during heat treatment was conducted. In addition, 1, 5, 7, and 10 h of milling time were selected as variables to identify optimum conditions for completion of reaction in forming pure forsterite powder. Based on the X-ray diffraction results, 1200°C heat treatment, 2 h of holding time, and 7 h of milling successfully produced single phase forsterite powders with crystallite size of 41 nm. The forsterite powder was compacted and sintered at temperatures ranging from 1200 to 1500°C. The highest hardness and fracture toughness of 7.11 GPa and 4.88 MPa m 1/2 were achieved when sintered at 1400°C, respectively. Meanwhile, the highest relative density of 91% was obtained for the sample sintered at 1500°C.

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Preparation and characterization of nano-hydroxyapatite powder using sol-gel technique

Cited by 135 publications

References 33 publications

Low Crystallinity Nanohydroxyapatite Prepared at Room Temperature

Low Crystallinity Nanohydroxyapatite Prepared at Room Temperature

Investigation of the mechanical properties of a low-shrinkage liquid crystalline matrix combined with nano-hydroxyapatite

Study on the effects of milling time and sintering temperature on the sinterability of forsterite (Mg<sub>2</sub>SiO<sub>4</sub>)

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