Abstract A systematic research was performed about diffusion kinetics of adsorbing F − dissolved in water for carbonate hydroxyapatite (CHAP) from the natural hydroxyapatite which was modified by adulterating with CO ...
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Abstract A systematic research was performed about diffusion kinetics of adsorbing F − dissolved in water for carbonate hydroxyapatite (CHAP) from the natural hydroxyapatite which was modified by adulterating with CO 2 3 . The result shows that the speed of F − adsorption is controlled by membrane diffusion when F − concentration is relatively low, which is expressed by the kinetic equation of diffusion Q =0.0005( C 1 - C )( t - t 1 )+0.3967, or by vacancy diffusion when F − concentration is relatively high, which is expressed by the kinetic equation of diffusion In[ C (o, t )]=8.4718-0.5048ln t . Based on the feature of CHAP for adsorbing F − dissolved in water and its special channel of the structure of CO 2 3 - modified hydroxyapatite, models of vacancy diffusion and membrane diffusion were established.
Molybdenum-doped vanadium pentoxide (Mo-doped V2O5) thin films with doping levels of 3-10 mol% were prepared by dip-coating technique from a stable Mo-doped V2O5 sol synthesized by sol-gel and hydrothermal reaction. T...
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We report Langmuir-Blodgett (LB) based assembly of vanadium dioxide (VO2) nanowires. VO2 nanowires were functlonallzed with stearic acid (SA) and cetyltrlmethylammonlum bromide (CTAB) and then spread on the surface In...
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To improve the sliding wear resistance of AZ91D magnesium alloy, Cu-based amorphous composite coatings made of CuaTTi34Zr11Nis and Cu47Ti34Zr11Ni8＋20 wt pct SiC powders were fabricated on AZ91D magnesium alloy by las...
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To improve the sliding wear resistance of AZ91D magnesium alloy, Cu-based amorphous composite coatings made of CuaTTi34Zr11Nis and Cu47Ti34Zr11Ni8＋20 wt pct SiC powders were fabricated on AZ91D magnesium alloy by laser cladding, respectively. SEM （scanning electron microscopy）, EDS （energy dispersive X-ray spectroscopy）, XRD （X-ray diffraction） and TEM （transmission electron microscopy） techniques were employed to study the phases of the coatings. The results show that the coatings mainly consist of amorphous phase and different intermetallic compounds. The reason of formation of amorphous phase and the function of SiC particles were explained in details.
In this paper, a carbothermal reduction and nitridation (CRN) synthesis for cubic aluminum oxynitride (γ-AlON) powders is reported. The CRN reaction was conducted via a two-step synthesis procedure at a heating rate ...
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Steady organic-inorganic perovskite hybrids with [H22-AMP] 3/2Fe(CN)6, [H23-AMP]3/2Fe(CN) 6 and [H24-AMP]3/2Fe(CN)6 (AMP = aminomethylpyridine) were formed in the air. Each structure shows an unusual layered organic-i...
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A novel polyurea adhesive with good mechanical properties was prepared with aromatic amine terminated polyether and HDI modified by aromatic amine terminated polyether as A, B of polyurea, according to the steric effe...
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A novel polyurea adhesive with good mechanical properties was prepared with aromatic amine terminated polyether and HDI modified by aromatic amine terminated polyether as A, B of polyurea, according to the steric effect of arylamino. The effect of mass ratio for A, B part on the mechanical properties was studied and Degree of hydrogen bonding was researched by FT-IR. The experimental results show that the optimal adhesive to the aluminum is 25.98 MPa when the mass ratio of A to B is about 1.55. Degree of Ordered hydrogen bonding for the ureacarbonyl groups just is 4.31%. This shows that introduction of aromatic rings has decreased Hydrogen bonding of intermolecular, free NH can bond with metal surfaces, so the adhensive properties are improved.
ITO/AZO double films were deposited by RF sputtering on p-Si(100) substrate to fabricate ITO/AZO/SiO2/p-Si SIS heterojunction. The structural, optics and electrical properties of the ITO/AZO films were characterized b...
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