Search

In this work, an organic double-layer protective coating (ODC) was fabricated through a simple spray process on aluminum and steel. The coating is built as double-layer structure of heat resist base layer and reflective surface layer. Laser with power 103~104Wcm-2was set to ablate samples for 4s, while the temperature of panels’ back were being measured. Also, reflectivity of the coating was tested. Results demonstrated that reflectivity of ODC was up to 94%, and the panels were less apt to be ablated by laser radiation after coated, while the temperatures measured were substantially lower compared to blank panels with respect to the coating structure and composition.

Fe 3 O 4 /T-ZnOw composites are fabricated by depositing a layer of Fe 3 O 4 film on the surface of tetrapod-shaped ZnO whisker (T-ZnOw) by ferrite plating method. The morphology, structure and magnetic properties of the composites are characterized by scanning electron microscopy (SEM), X-ray diffractometer (XRD) and vibrating-sample magnetometer (VSM), respectively. The effects of temperature and pH value of ferrite plating on the Fe 3 O 4 /T-ZnOw composites and the magnetic properties of composites are studied. It is shown that the chemical environment with pH value at 7.5 is most favorable for the ferrite plating processes by analyzing the main peaks intensity of Fe 3 O 4 in the XRD patterns and the average diameters of the Fe 3 O 4 crystalline. The increase of the ferrite plating temperature with pH value around 7.5 benefits the whole encapsulation of T-ZnOw by the Fe 3 O 4 magnetic films. The composites exhibit ferromagnetic properties and show much lower magnetization intensity than bulk samples at the same magnetic field intensity.