Evaluation of Sr- and/or Mg-Containing Hydroxyapatite Behavior in Simulated Body Fluid

2014 ◽  
Vol 631 ◽  
pp. 61-66 ◽  
Author(s):  
Liga Stipniece ◽  
Kristine Salma-Ancane ◽  
Andris Putnins ◽  
Liga Berzina-Cimdina
Keyword(s):  
Simulated Body Fluid ◽  
Body Fluid ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Apatite Formation ◽  
Particle Sizes ◽  
Chemical Phase ◽  
Ca Ions ◽  
Wet Chemical ◽  
Wet Chemical Precipitation

The main goal of this study was to evaluate the behavior of Sr- and/or Mg-containing hydroxyapatite (HAp) bioceramics in simulated body fluid (SBF). Sr-and/or Mg-containing HAp powders were synthesized by modified wet chemical precipitation method. Sr-and/or Mg-containing HAp bioceramics were prepared by uniaxial pressing of the precipitated powders and subsequent sintering at 1100 °C for 1 h. The synthesis products were characterized in terms of chemical, phase and molecular composition. Influence of the substitutions on thermal stability, morphology and microstructure of the HAp products were evaluated. Results suggest that incorporation of Sr (up to 1.45 wt.%) in HAp structure induced an increasing of particle sizes, but incorporation of Mg (up to 1.05 wt.%) led to a reduction of particle sizes of the HAp powders. The ability to simultaneously release bioactive ions and the apatite-formation ability of the Sr-and/or Mg-containing HAp bioceramics were evaluated through immersing the samples in SBF for different time periods. Ca ions release and apatite-formation ability on the surfaces of the Sr-and/or Mg-containing HAp bioceramics in SBF depends on Sr and/or Mg concentration in the samples.

Synthesis and Structural Characterization of Zinc and Magnesium Doped Hydroxyapatite

2012 ◽  
Vol 531-532 ◽  
pp. 250-253 ◽  
Author(s):  
Hong Quan Zhang ◽  
Ming Zhang ◽  
Lu Wei Fu ◽  
Yu Ning Cheng
Keyword(s):  
Hydrothermal Treatment ◽  
Structural Characterization ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Starting Solution ◽  
Wet Chemical ◽  
Zn Ions ◽  
Wet Chemical Precipitation ◽  
Surface Of Crystals

Zn or Mg ions doped hydroxyapatite (HA) particles were successfully developed by introducing various concentration of Zn or Mg in the starting solution using wet chemical precipitation method and followed a hydrothermal treatment. The products were identified as HA by XRD and FTIR, and the precipitated particles had a rod-like morphology. All the products for Mg and Zn ions concentration in the preparation solution less than 40 mol% were identified as HA. Substitution of Mg and Zn in HA crystal would impair the crystallization of HA and significantly reduce the length of a, c values of HA unit cell, which clearly demonstrated that Mg or Zn ions were structurally incorporated into the apatite crystals, they were not just absorbed on the surface of crystals.

scholarly journals Far-infrared optical constants of ZnO and ZnO/Ag nanostructures

RSC Advances ◽  
2014 ◽  
Vol 4 (40) ◽  
pp. 20902-20908 ◽  
Author(s):  
Reza Zamiri ◽  
Avito Rebelo ◽  
Golriz Zamiri ◽  
Atena Adnani ◽  
Ajay Kuashal ◽  
...  
Keyword(s):  
Optical Constants ◽  
Far Infrared ◽  
Cost Effective ◽  
Chemical Precipitation ◽  
Chemical Precipitation Method ◽  
Precipitation Method ◽  
Ag Nanoparticle ◽  
Wet Chemical ◽  
Wet Chemical Precipitation

We report on the synthesis of ZnO nanoplates and ZnO nanoplate/Ag nanoparticle heterostructures via a simple and cost effective wet chemical precipitation method.

Probing the photocatalytic competency of hydroxyapatite synthesized by solid state and wet chemical precipitation method

2021 ◽  
pp. 132142
Author(s):  
Mashrafi Bin Mobarak ◽  
Md. Sahadat Hossain ◽  
Zenefar Yeasmin ◽  
Monika Mahmud ◽  
Md. Maksudur Rahmana Sazia Sultana ◽  
...  
Keyword(s):  
Solid State ◽  
Chemical Precipitation ◽  
Chemical Precipitation Method ◽  
Precipitation Method ◽  
Wet Chemical ◽  
Wet Chemical Precipitation

scholarly journals Synthesis and Characterization of Fe-doped Hydroxyapatite

2012 ◽  
Vol 47 (1) ◽  
pp. 1-8 ◽  
Author(s):  
S. F. Kabir ◽  
S. Ahmed ◽  
A. I. Mustafa ◽  
M. Ahsan ◽  
S. Islam
Keyword(s):  
Ceramic Material ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Synthesis And Characterization ◽  
Ft Ir ◽  
Standard Values ◽  
Wet Chemical ◽  
Egg Shell ◽  
Wet Chemical Precipitation

Fe-doped hydroxyapatite bio-ceramic material has been successfully synthesized by wet chemical precipitation method using waste egg shell as Ca precursor and (NH4)2HPO4 as P precursor. Two different concentrations of doping solutions (0.1 M and 0.05 M) were chosen and the developed apatite was characterized by using FT-IR, XRF, XRD and SEM techniques. Observed data were in excellent agreement with the standard values for hydroxyapatite which indicated successful formation of the Fe- doped apatite of different concentrations.DOI: http://dx.doi.org/10.3329/bjsir.v47i1.10711Bangladesh J. Sci. Ind. Res. 47(1), 1-8, 2012

Effect of Nano Silica on the Sinterability of Hydroxyapatite Dense Bodies

2011 ◽  
Vol 264-265 ◽  
pp. 1832-1838 ◽  
Author(s):  
R. Tolouei ◽  
Chou Yong Tan ◽  
Ramesh Singh ◽  
Iis Sopyan ◽  
Wan Dung Teng
Keyword(s):  
Mechanical Properties ◽  
Bulk Density ◽  
Sintering Temperature ◽  
Xrd Analysis ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Nano Silica ◽  
Dense Bodies ◽  
Wet Chemical ◽  
Wet Chemical Precipitation

The effects of adding a small amount of nano silica in hydroxyapatite (HA) on the sinterability and mechanical properties of hydroxyapatite were studied. The starting HA powder was synthesized using a novel wet chemical precipitation method. Different amount of silica powder was mechanically mixed with the synthesized HA. The green samples were subsequently cold isostatically pressed at 200 MPa. Sintering in air was accomplished by firing the green samples at temperatures ranging from 1050°C to 1250°C. Sintered samples were analyzed to determine phase composition and mechanical properties. The XRD analysis revealed that with increasing the amount of silica in the HA powder, decomposition of HA to TCP occurred at sintering temperature higher than 1050°C. The bulk density of all silica-doped samples decreased through the temperature range studied. In agreement with the bulk density trend, the increasing silica additives in HA depleted the Young’s modulus and Vickers hardness of the HA body. The study revealed that the addition of silica have an adverse effect on the sintered properties of hydroxyapatite bioceramics.

Formation of Secondary Phases on Hydroxyapatite Powders for Bone Regeneration: Effect of Water Source

2008 ◽  
Vol 587-588 ◽  
pp. 37-41
Author(s):  
Vera Lourenço ◽  
Susana Dias ◽  
Carlos A. Nogueira ◽  
Fernando A. Costa Oliveira
Keyword(s):  
Water Source ◽  
Chemical Precipitation ◽  
Synthesis Temperature ◽  
Precipitation Method ◽  
Secondary Phases ◽  
Factors Affecting ◽  
Precipitation Medium ◽  
Wet Chemical ◽  
Regeneration Effect ◽  
Wet Chemical Precipitation

This study focus on the synthesis of Ca-deficient apatites (CDA) by using the wet chemical precipitation method in demineralised water solutions at pH=7 and synthesis temperature of 90 °C. Upon calcination at 1000°C, the resulting HAP powders decomposed leading to the formation of small amounts of β-TCP. Surprisingly, under some conditions, minor amounts of α- TCP were also formed at 1000°C together with β-TCP. The appearance of α-TCP is favoured by the absence of mineral ions in the precipitation medium, which in turn depends on the purity of the water used. Factors affecting the formation of both β-TCP and α-TCP are discussed.

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