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Iron oxide particles with various shapes, sizes and phase concentrations (including α-Fe2O3 and Fe3O4) have been synthesized through a simple hydrothermal method in the ethylene glycol (EG)-water system. In the preparation conditions, ferric chloride (FeCl3·6H2O) was used as the iron source in the presence of sodium hydroxide (NaOH) without any surfactants. By adjusting the experimental parameters...
A cause analysis model of pseudo solder for chip component is presented. Based on analyzing the causes of the chip pseudo solder, an comprehensive equation, which is composed of an ellipse equation and a circle equation, is used to fit the surface shape of chip solder joint. On the basis of that, the chip pseudo solder model is presented. All the parameters of the chip pseudo solder model are effected...
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