Papers by Author: Dan Dan Lin

Abstract: Thin Mn2(NO3)2/PVA precursor nanowire was fabricated via electrospinning technology at a low temperature in this paper. After dried at 150°C for 10 hours and then sintered at 450°C for 2 hours, Mn2O3 nanowire was successfully obtained. The nanowire was characterized using X-ray diffraction and scanning electron microscopy. The results showed that the nanowire was composed of pure Mn2O3 phase. The nanowire exhibited smooth surface and continuous sharp with length of tens of micrometer. The diameter of Mn2O3 nanowire was measured and calculated through SEM, which showed most probable value of about 110 nm and 270 nm. The reason of the diameter separation was also discussed.

Abstract: In this paper, porous carbon was made from biomass derived carbonaceous mesophase and carbonaceous fillers, and further applied as the substrate for CVD grow of nano carbon materials. With the assistance of microwave plasma, the acetone gas was decomposed into carbon and grew on the surface of the porous carbon, which produce ballas diamonds, carbon tubes, nets, petal, and other structures.

Abstract: In this paper we report a study using fully automated EBSP orientation measurements on the texture and microstructure of fully processed Bi-2223 tapes produced by the powder-in-tube method. For the automated analysis a new unit cell describing the quasi-tetragonal Bi-2223 phase has been developed. The texture data confirm that a strong fibre texture is produced during processing, with the c-axis of the Bi2223 plates parallel to the tape normal direction. Quantitative analysis suggests that the orientation density along the fibre texture is close to random. In contrast the distribution of misorientations shows significant correlations between the orientations, and is skewed towards low misorientation angles. A more detailed investigation reveals that the structure consists of colonies of plates, with low angle misorientations within each colony. Analysis of the rotation axes shows some differences as a function of misorientation angle.