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Nowadays, the microelectronics industry broadly uses the flipchip technology to enhance the packaging density. However, the small size and the unique geometry of the flip-chip solder joints induce the electromigration (EM) reliability issue. In this study, a Pb-free solder joints (SAC1205) was EM tested by a current of 7.5×103 A/cm2. During the tests, a three-dimensional (3D) X-ray laminography method...
Glycidoxypropyltrimethoxysilane (GPTMS) was employed, for the first time, as a new sonochemical promoter for the synthesis of gold nanoparticles (NPs) as well as γ-Fe2O3/Au@SiO2 nanocomposites. In either case, GPTMS shows higher efficiency at reduction rate of Au(III) than conventional radial scavengers (alcohols), which is likely attributed to a cascade to generate 4-folds higher amount of alcoholic...
Mg-substituted olivine LiFePO4 at Li-site and Fe-site, namely, Li0.98FeMg0.02PO4/C, LiFe0.98Mg0.02PO4/C and Li0.99Fe0.99Mg0.02PO4/C, were synthesize via a two-step method with pre-heating. X-ray diffraction (XRD) patterns indicate all of the samples have pure olivine structures. Scanning electron microscopy (SEM) imply that the Li-site doping will lead to an anomalistic apparent morphology with a...
Mg-substituted olivine LiFePO4 samples with various substituted contents were prepared via a two-step method. The crystal structures of the as-prepared LiFe1−xMgxPO4 (x=0, 0.02, 0.1, 0.2) were detected by X-ray diffraction, and no impurities found. The electrochemical performances of the LiFe1−xMgxPO4 cathodes were evaluated by charge/discharge test, cyclic voltammetry, and electrochemical impedance...
Simulated Moving Bed chromatography has become a widely used separation technology in die pharmaceutical and fine chemical industries. In particular, the separation of enantimeric mixtures has received recently great interest because it can achieve good performances and high productions. SMB process is a typical hybrid system with both continuous and discrete variables. The thesis proposed the SMB...
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