high energy grinding hydroxyapatite

  • Structure and Electrical Properties of Hydroxyapatite

    Hydroxyapatite (HA) was reinforced by adding 5 to 25 weight percent titanium oxides (Anatase) at 50 Hz high energy vibratory ball milling for one hour

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  • Structure and compression strength of hydroxyapatite

      Recently the effect of high energy ball milling (HEBM) treatment on hydroxyapatite with titanium and silicon has been described , During HEBM process, the impacts of the milling balls result in a significant decrease of the HA particle and crystalline size forming nanoscale structure

    Cited by: 56
  • (PDF) Structure and compression strength of

    Hannora et al [8] prepared HA/titania composites by a highenergy ball milling technique and achieved a high crushing strength of more than 200 MPa in comparison to 50 MPa for pure hydroxyapatite

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  • High energy ballmill behavior of titania +

    The hydroxyapatite nanocomposites (HAp/TiO 2 ) were produced by using high energy ball milling Xray diffraction studies revealed the formation of HAp and TiO 2 composites

  • (PDF) Powder Xray Diffraction Studies of

    Structural changes of hydroxylapatite and isomorphic carbonate incorporation upon high energy milling for 20, 60 and 100 h were monitored

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  • (PDF) Development of hydroxyapatite/polyvinyl

    In the present investigation high energy ball mill is used to produce nanohydroxyapatite powders in bulk quantity by optimizing the milling parameters using stainless steel grinding media

  • Hydroxyapatite synthesis and the benefits of its blend

      Hydroxyapatite (HA) is a calcium phosphate and the main mineral component of bones and teeth However, its use as a biomaterial is limited due to the poor mechanical strength presented by this compound Various techniques have been investigated for HA production, considering its good biocompatibility and chemical stability in the implanted area

    Cited by: 16
  • Synthesis method of hydroxyapatite: A review

      Hydroxyapatite (HAp) is most common calcium phosphate ceramic that is used in biomedical applications owing to its chemical composition, which is similar to human bone and teeth Hydroxyapatite can be synthesised using chemical precursors, especially calcium and phosphorus, using various methods including, dry, wet, thermal, or a combination of these methods

  • Surface energy of hydroxyapatite and βtricalcium

      Highly dense phosphate ceramics (singlephase hydroxyapatite HA and βtricalcium phosphates βTCP) presenting two distinct nano roughnesses were produced Some samples were goldsputter coated in order to conveniently mask the surface chemical effects (without modification of the original roughness) and to study the isolated effect of surface topography on cellular behavior

    Cited by: 123
  • Optimization of milling parameters for the

      Here we report synthesis of nanocrystalline hydroxyapatite (HAP), a bone substitute, through dry mechanochemical method using phosphorous pentoxide and calcium hydroxide powders as starting materials, in a specially designed highenergy dualdrive planetary mill which is able to generate a strong gravitational (around 100 g) field inside the planetary mill thereby reducing the synthesis time

    Cited by: 17
  • Hydroxyapatite synthesis and the benefits of its blend

      Hydroxyapatite (HA) is a calcium phosphate and the main mineral component of bones and teeth However, its use as a biomaterial is limited due to the poor mechanical strength presented by this compound Various techniques have been investigated for HA production, considering its good biocompatibility and chemical stability in the implanted area

  • (PDF) Powder Xray Diffraction Studies of

    Structural changes of hydroxylapatite and isomorphic carbonate incorporation upon high energy milling for 20, 60 and 100 h were monitored

  • Adhesion of Hydroxyapatite Nanoparticles to Dental

      Adhesion of Hydroxyapatite Nanoparticles to Dental Materials under Oral Conditions desirable biomimetic material include high surface energy, high solubility, and optimal bioactivity [6, 8, 9] ized grinding procedure with grid sandpapers (from

  • Synthesis method of hydroxyapatite: A review

      Hydroxyapatite (HAp) is most common calcium phosphate ceramic that is used in biomedical applications owing to its chemical composition, which is similar to human bone and teeth Hydroxyapatite can be synthesised using chemical precursors, especially calcium and phosphorus, using various methods including, dry, wet, thermal, or a combination of these methods

  • Highscale yield of nano hydroxyapatite through

      The aim of this study is to develop a simple, convenient and effective approach to synthesize nanosized hydroxyapatite (nanoHA) at highscale yield NanoHA was wet synthesized in the presence or absence of alendronate sodium (ALN), one of bisphosphonates for antiosteoporotic

  • ifsm iste high photocatalytic activity of hydroxyapatite

      Cu2+) incorporation was carried out by dint of grinding and high temperature effect for remove all impurity Hydroxyapatite (HAP) powders doped with metal ions were characterized by uvvisible spectroscopy analysis to evaluate the photocatalytic activity of all samples of hydroxyapatite The result shows the high photocatalytic activity of all HAP

  • Grinding: An Idea, from LABORATORY to INDUSTRY

      • High Energy Planetary Mill (used for grinding/milling/ mechanical alloying) • N t lliNanocrystalline CbidCarbides : (iron carbide, silicon carbide, titanium carbide) (d(used as abibrasive parti lticles, coating matilterials on cutting tools, in automobile industry) • Nanocrystalline Hydroxyapatite

  • Electrocrystallization of Hydroxyapatite and Its

      Electrocrystallization of hydroxyapatite (HAp) on titanium was achieved by cathodic polarization in solution containing calcium nitrate and ammonium dihydrogen phosphate The composition and pH of the bath were found to significantly affect the nature and surface morphology of the deposit The effect of bath temperature was also studied Xray diffraction tests and microscopic inspections

  • Electrodeposited HydroxyapatiteBased Biocoatings:

    Hydroxyapatite has become an important coating material for bioimplants, following the introduction of synthetic HAp in the 1950s The HAp coatings require controlled surface roughness/porosity, adequate corrosion resistance and need to show favorable tribological behavior The deposition rate must be sufficiently fast and the coating technique needs to be applied at different scales on

  • Effect of nonstoichiometry and amount of additives on

      The highenergy milling conditions were as follows: milling time of 15, 30, 60, 120, 240, and 480 min; rotation direction reversed every 15 min; interval between direction reversals, 5 s; rotation speed of the disk supporting the grinding vials, 500 rpm

  • Adhesion of Hydroxyapatite Nanoparticles to Dental

      Adhesion of Hydroxyapatite Nanoparticles to Dental Materials under Oral Conditions desirable biomimetic material include high surface energy, high solubility, and optimal bioactivity [6, 8, 9] ized grinding procedure with grid sandpapers (from

  • Adhesion of Hydroxyapatite Nanoparticles to Dental

      Hydroxyapatite nanoparticles (nanoHAP) are receiving considerable attention for dental applications, and their adhesion to enamel is well established However, there are no reports concerning the effects of HAP on other dental materials, and most of the studies in this field are based on in vitro designs, neglecting the salivary pellicleapatite interactions

  • Electrodeposited HydroxyapatiteBased Biocoatings:

    Hydroxyapatite has become an important coating material for bioimplants, following the introduction of synthetic HAp in the 1950s The HAp coatings require controlled surface roughness/porosity, adequate corrosion resistance and need to show favorable tribological behavior The deposition rate must be sufficiently fast and the coating technique needs to be applied at different scales on

  • Electrocrystallization of Hydroxyapatite and Its

      Electrocrystallization of hydroxyapatite (HAp) on titanium was achieved by cathodic polarization in solution containing calcium nitrate and ammonium dihydrogen phosphate The composition and pH of the bath were found to significantly affect the nature and surface morphology of the deposit The effect of bath temperature was also studied Xray diffraction tests and microscopic inspections

  • A Review on Ionic Substitutions in Hydroxyapatite

    Plasma sprayed coatings composed of stoichiometric hydroxyapatite have been extensively used to improve integration of metallic implants in the host bone, as hydroxyapatite (HA) is normally regarded as similar to the mineralized phase of bone However, these coatings exhibited several drawbacks that limited their success On the one hand biological apatite is a carbonatedHA, containing

  • Noblemetalfree hydroxyapatite activated by facile

      However, regards to the highcost, critical requirement on nanoparticle size and dispersibility controlling, development of alternative and novel noblemetalfree catalyst is urgently desired

  • Effect of nonstoichiometry and amount of additives on

      The highenergy milling conditions were as follows: milling time of 15, 30, 60, 120, 240, and 480 min; rotation direction reversed every 15 min; interval between direction reversals, 5 s; rotation speed of the disk supporting the grinding vials, 500 rpm

  • c axis preferential orientation of hydroxyapatite

      He, C, Xia, B et al caxis preferential orientation of hydroxyapatite accounts for the high wear resistance of the teeth of black carp (Mylopharyngodon piceus) Sci Rep 6, 23509 (2016) https

  • Optimization of process parameters for preparation of

      Hydroxyapatite (HA) powder was prepared by a sol–gel method using Ca(NO3)24H2O and (NH4)2HPO4 as raw materials The usage of preset parameters just mixing the two raw materials only produced Ca2P2O7 and βCa3(PO4)2, without any evidence of HA

  • Influence of mechanochemical treatment on thermal and

      energy into the reaction system is very often associated with long periods of time to achieve the required conditions and high energy consumption It should be also stressed that the principles of “green chemistry” are the guidelines for reducing the consumption of raw materials, energy, generated wastes and, in general, production costs

  • Adhesion of Hydroxyapatite Nanoparticles to Dental

      Adhesion of Hydroxyapatite Nanoparticles to Dental Materials under Oral Conditions desirable biomimetic material include high surface energy, high solubility, and optimal bioactivity [6, 8, 9] ized grinding procedure with grid sandpapers (from

  • Nano‐hydroxyapatite (HAp) and

      The Canadian Journal of Chemical Engineering, published by Wiley on behalf of The Canadian Society for Chemical Engineering, is the forum for publication of high quality original research articles, new theoretical interpretation or experimental findings and critical reviews in the science or industrial practice of chemical and biochemical processes

  • Electrodeposited HydroxyapatiteBased Biocoatings:

    Hydroxyapatite has become an important coating material for bioimplants, following the introduction of synthetic HAp in the 1950s The HAp coatings require controlled surface roughness/porosity, adequate corrosion resistance and need to show favorable tribological behavior The deposition rate must be sufficiently fast and the coating technique needs to be applied at different scales on

  • Electrocrystallization of Hydroxyapatite and Its

      Electrocrystallization of hydroxyapatite (HAp) on titanium was achieved by cathodic polarization in solution containing calcium nitrate and ammonium dihydrogen phosphate The composition and pH of the bath were found to significantly affect the nature and surface morphology of the deposit The effect of bath temperature was also studied Xray diffraction tests and microscopic inspections

  • Noblemetalfree hydroxyapatite activated by facile

      However, regards to the highcost, critical requirement on nanoparticle size and dispersibility controlling, development of alternative and novel noblemetalfree catalyst is urgently desired

  • A Review on Ionic Substitutions in Hydroxyapatite

    Plasma sprayed coatings composed of stoichiometric hydroxyapatite have been extensively used to improve integration of metallic implants in the host bone, as hydroxyapatite (HA) is normally regarded as similar to the mineralized phase of bone However, these coatings exhibited several drawbacks that limited their success On the one hand biological apatite is a carbonatedHA, containing

  • Deposition of thin hydroxyapatite films by 335 nm

      Deposition of thin hydroxyapatite films by laser ablation 695 hydroxyapatite target was a dense disk, acquired from the Berkeley Advanced Biomaterials, Inc The laser fluence was ~33 J⋅cm–2 (intensity I = 033 GW⋅cm–2) The incident angle of the laser beam was 45° to the surface normal The deposition was made

  • Adsorption of Uranyl Ions at the Nanohydroxyapatite

      Nanohydroxyapatite and its modification, hydroxyapatite with the excess of phosphorus (PHAP) and hydroxyapatite with the carbon ions built into the structure (CHAP), were prepared by the wet method They were studied by means of XRD, accelerated surface area and porosimetry (ASAP), and SEM The size of crystallites computed using the Scherrer method was nanohydroxyapatite (HAP) =

  • c axis preferential orientation of hydroxyapatite

      He, C, Xia, B et al caxis preferential orientation of hydroxyapatite accounts for the high wear resistance of the teeth of black carp (Mylopharyngodon piceus) Sci Rep 6, 23509 (2016) https

  • Chemical gradients in human enamel crystallites

      Dental enamel is a principal component of teeth1, and has evolved to bear large chewing forces, resist mechanical fatigue and withstand wear over decades2 Functional impairment and loss of