Influence of microwave power on nanosized hydroxyapatite particles

Siddharthan, A; Seshadri, S.K.; Kumar, T.S. Sampath

doi:10.1016/j.scriptamat.2006.03.044

Cited by 69 publications

(36 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This value is similar to the particle size obtained by Siddharthan et al using a microwave-based thermal treatment process. 50 The presence of ultrasound in the synthesis procedure prior to the thermal treatment has a significant influence in forming the initial nano-HAP particle precursors. This is due to the particle size being related to nucleation and the growth pattern of the material, which in turn is related to the degree of super saturation within the liquid phase.…”

mentioning

confidence: 99%

Thermal and ultrasonic influence in the formation of nanometer scale hydroxyapatite bio-ceramic

Poinern¹,

Brundavanam²,

Le³

et al. 2011

IJN

View full text Add to dashboard Cite

Hydroxyapatite (HAP) is a widely used biocompatible ceramic in many biomedical applications and devices. Currently nanometer-scale forms of HAP are being intensely investigated due to their close similarity to the inorganic mineral component of the natural bone matrix. In this study nano-HAP was prepared via a wet precipitation method using Ca(NO 3 ) 2 and KH 2 PO 4 as the main reactants and NH 4 OH as the precipitator under ultrasonic irradiation. The Ca/P ratio was set at 1.67 and the pH was maintained at 9 during the synthesis process. The influence of the thermal treatment was investigated by using two thermal treatment processes to produce ultrafine nano-HAP powders. In the first heat treatment, a conventional radiant tube furnace was used to produce nano-particles with an average size of approximately 30 nm in diameter, while the second thermal treatment used a microwave-based technique to produce particles with an average diameter of 36 nm. The crystalline structure and morphology of all nanoparticle powders produced were investigated using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR). Both thermal techniques effectively produced ultrafine powders with similar crystalline structure, morphology and particle sizes.

show abstract

mentioning

confidence: 99%

Thermal and ultrasonic influence in the formation of nanometer scale hydroxyapatite bio-ceramic

Poinern¹,

Brundavanam²,

Le³

et al. 2011

IJN

View full text Add to dashboard Cite

show abstract

“…In particular, for BC-FeC sample, the diffraction peak of the (0 0 2) Miller plane family is relatively broader than the other peaks. This result suggests the crystal destruction along the c-axis of the hydroxyapatite structure [61,62]. On the other hand, bone chars doped with aluminum salts have similar crystalline structures and XRD profiles than that obtained for raw BC.…”

Section: Saltmentioning

confidence: 88%

Physico-chemical characterization of metal-doped bone chars and their adsorption behavior for water defluoridation

Rojas-Mayorga

Bonilla-Petriciolet

Silvestre-Albero

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

“…El sólido se recuperó por decantación y se secó en una estufa a 70 ºC (muestra denominada HA12). Esta muestra se comparó con la que se obtiene en condiciones similares pero sin irradiación y que está reportada en la bibliografía [16][17][18].…”

Section: Preparación De Las Muestrasunclassified

“…Es de suponer que la irradiación con microondas durante la preparación de la hidroxiapatita agilice el proceso de síntesis [16][17][18] y quizá procure sólidos textural y morfológicamente originales.…”

Section: Introductionunclassified

Efecto del pH en la síntesis de hidroxiapatita en presencia de microondas

2010

View full text Add to dashboard Cite

RESUMENLa hidroxiapatita sintética, Ca 10 (PO 4 ) 6 (OH) 2 , es un biomaterial que se emplea para reconstruir tejido óseo dañado o como recubrimiento de prótesis, ya que su composición química y su estructura se asemejan a la fase mineral contenida en el esqueleto; esta similitud favorece la formación de enlaces con el hueso, siendo por consiguiente un material biocompatible. La hidroxiapatita se puede obtener a partir de huesos, pero hoy en día se sintetiza mediante diferentes procedimientos químicos, como las reacciones en estado sólido, el método sol-gel, la reacción por doble descomposición, la neutralización o el método hidrotérmico. El método hidrotérmico es el más empleado por su simplicidad, pero los inconvenientes del proceso son las altas temperaturas (600-1000 ºC) y los largos tiempos (2-14 días) necesarios para obtener los cristales de hidroxiapatita. Por otro lado, una mejora novedosa en la síntesis de sólidos como las arcillas pilareadas, las hidrotalcitas o las zeolitas es la irradiación con microondas que tiene la particularidad de reducir los tiempos y las temperaturas de cristalización.En este trabajo se presenta la síntesis de hidroxiapatita por medio de irradiación con microondas en una autoclave a 80 ºC, por 10 minutos, 1 atm y una potencia de 200 W. Además, se estudió la influencia del pH en la preparación. El tratamiento con microondas redujo considerablemente el tiempo de síntesis en comparación con otros métodos y las propiedades, la textura y la morfología de la hidroxiapatita obtenida resultaron ser significativamente diferentes.Palabras clave: Hidroxiapatita, biomateriales, irradiación con microondas, núcleos, hidroxilos, porosidad, pH, morfología.Hydroxyapatite synthesis using microwave irradiation during the crystallization step ABSTRACT Synthetic hydroxyapatite, Ca 10 (PO 4 ) 6 (OH) 2 , is a biomaterial used to reconstruct damaged bone tissue or to recover protheses. Indeed, the chemical composition and structure is similar to the mineral phase contained in the scheleton. This similarity favors the formation of bonds with the bone, it becomes then a biocompatible material. Hydroxyapatite may be obtained from bones, but, nowadays, it is synthesized through various chemical procedures such as: solid state, sol-gel, double decomposition, neutralization and hydrothermal reactions. The hydrothermal method is the most employed due to its simplicity but it presents the disadvantage of the required high temperatures (600-1000 °C) and very long times (2-14 days) to obtain hydroxyapatite crystals. A recent improvement in the synthesis of solids as pillared clays, hydrotalcites or zeolites has been the microwave irradiation, as it reduces time and crystallization temperature.In this work, hydroxyapatite is synthesized in presence of microwave irradiation in an autoclave at 80 °C for 10 minutes, 1 atm and 200 W power. The influence of pH is studied. The microwave treatment reduced considerably the synthesis time if compared to the other methods. The properties, texture and morphology of the ob...

show abstract

Influence of microwave power on nanosized hydroxyapatite particles

Cited by 69 publications

References 12 publications

Thermal and ultrasonic influence in the formation of nanometer scale hydroxyapatite bio-ceramic

Thermal and ultrasonic influence in the formation of nanometer scale hydroxyapatite bio-ceramic

Physico-chemical characterization of metal-doped bone chars and their adsorption behavior for water defluoridation

Efecto del pH en la síntesis de hidroxiapatita en presencia de microondas

Contact Info

Product

Resources

About