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Gd2O3:Er3+,Yb3+ microcrystals were prepared by the co-precipitation method using water or ethanol/water as solvents. The effects of solvents on particle size, morphology, and photoluminescence intensity were investigated. The microcrystal were systematically characterized by X-ray diffraction (XRD), thermogravimetry-differential scanning calorimetry (TG-DSC), scanning electron microscope (SEM), Fourier...
In the present studies, electroless ternary Ni-Co-P alloy deposits were prepared in an alkaline bath and characterizations were carried out to ascertain their properties such as composition, structure, phase transformation behavior and microhardness. The effect of various anions of the metallic sources was studied on the structure and properties of the ternary deposits. The different anionic bases...
Highly pure (K, Na)NbO3 lead-free piezoelectric ceramic powders have been successfully synthesized by solvothermal treatment at 220°C for 10 h using distilled water, ethanol, glycol or isopropanol as the solvent. The powders were characterized using X-ray powder diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), differential scanning...
Polyamide 6 (PA6) nanocomposites filled with 2, 4, 6, 8 wt% hydroxyapatite nanorods (nHA) were compounded in Brabender extruder followed by injection molding. The effect of nHA additions on the structure, mechanical properties and in vitro bioactivities of such nanocomposties were investigated. XRD patterns showed that PA6 crystallized exclusively in the ??-form by adding nHA. DSC analysis revealed...
FePO4??2H2O precursor was synthesized from FePO4??7H2O, NH4H2PO4, NH3??H2O and H2O2 as the oxidizing agent by solution precipitation route. Effects of reaction conditions, such as solution concentration, reaction temperature, stirring speed, adding amount of H2O2, pH and drying time on synthesis of FePO4??2H2O precursor were studied. Afterwards, Li2CO3, FePO4??2H2O and glucose were ground by wet process...
In-based solders were chosen for the low temperature bonding at lower than 180degC. Three kinds of bonding types on Au/Cu/Ti/SiO2/Si dies, which were Sn/In and Au/In for Type 1, Au/In and Au/Sn for Type 2, and InSn alloy and InSn alloy for Type 3, were studied expecting that the whole In- solder layer is converted to the mixed intermetallic compound (IMC) phases of In-Cu and In-Au IMCs after bonding...
A series of the polyimide-silica NLO nanohybrid materials were synthesized from 3,3', 4,4'- Bisphenyltetracarboxylic (BPDA), 2,2-Bis(3-amino-4-hydroxyphen-yl) hexafluoropropane (6FHP), nonlinear optical (NLO) molecule 4-(N-2-Hydroxyethyl-N-methylamino)-4'-[(6-nitroben-zothiazol-2-yl)-diazenyl] azobenzene (HNBDA), coupling agent APTES and hydrolysate of TEOS via sol-gel process. The TEOS contents in...
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