Calcium Hydroxyapatite Thin Films on Titanium Substrates Prepared by Ultrasonic Spray Pyrolysis

Abstract

Calciumhydroxyapatite thin films have been prepared by ultrasonic spray pyrolysis deposition on titanium substrate. The surface morphologies of the films formed at different deposition times were analysed by using SEM. The mechanism of the films formation was investigated in relation to the observed film morphology during the first stages of its formation, as well as to its consolidation to the final form. The chemical homogeneity of the synthesized films was determined by using EDS analysis, whereas the phase composition was determined by using XRD measurements and IR spectroscopy. The roughnesses and the thicknesses of the films were analysed by using surface profiler method. The continuous morphology films are obtained only for samples deposited more than 1.5 h.

Synthesis of Hydroxyapatite Bio-Ceramic Powder by Hydrothermal Method

“…The FT-IR spectrum of the HAp produced by hydrothermal method shown in Fig.4 shows all the characteristic bands for Hydroxyapatite [14,15]. The asymmetric stretching (v 3 ) and bending (v 4 ) modes of PO 4 -3 ion were detected at around 1047.9, and 604.1 and 566.7 cm were also present [16].…”

Luminescence properties of SiO2:Eu3+ nanopowders: Multi-step nano-designing

“…The waves formed by transferring ultrasound oscillations on a given precursor, depending on the superposition conditions, have a complex spatial form that primarily depend on oscillation damping factors in different directions (in the direction parallel or perpendicular to the direction of deformation) and on the forced frequency of the ultrasonic generator [15][16][17][18][19][20][21][22][23][24][25]. Based on the 3D model of capillary standing waves, formed at the meniscus surface, the following expression is obtained:…”

“…The particle size distribution can be estimated by equation [15][16][17][18][19][20][21][22][23][24][25]:…”

“…Processing parameters are chosen in such way to make this interaction constrained to preserve all inherent materials physical properties. Theoretical and experimental background, obtained on the structural and sub-structural designing of a various ceramic systems (alumina, mulite, cordierite, calciumhydroxyapatite, titanium di-oxide, wolfram bronzes doped with a phosphorus, argentum iodate) [15][16][17][18][19][20][21][22][23][24][25], is used in presented work to design and investigate SiO 2 :Eu 3+ powder self-assembling process. The resulting SiO 2 :Eu 3+ powder system is described by experimentally determined distributions of particle and sub-particle sizes, which are further compared to the theoretical calculations.…”

Laser Ablation of Biomaterials

“…The most commonly used metallic implants are based on titanium and its alloys due to their excellent mechanical properties and corrosion stability [16]. Unfortunately, studies in the ield showed that bare titanium or other metallic implants can determine ion release into body [17].…”