Papers by Author: De Wei Guo

Abstract: Green remanufacturing management, a sustainable management mode of development strategy, integrated the philosophy of green manufacturing and advanced manufacturing techniques, deeply implementing the reduction of resource consumption and environmental impact. It is the important link in the multi-lifecycle engineer of the products, which can effectively manage each link in the remanufacturing process of the products. In this paper, the connotation and characteristics of the green remanufacturing management were analyzed, and according to the current research situation of green remanufacturing management mode, the architecture including theoretical basis, content system and supporting techniques were proposed. On the basis of that, the key stage of the content structure: end-of-life management of recovery product, remanufacturing production management, performance assessment of remanufacturing product and reuse of remanufacturing product were expatiated in detail. In the end, the application strategy of the green remanufacturing management was discussed from the view of the sustainable development.

Abstract: Spinel LiMn2O4 was prepared by solution combustion synthesis. The effect of fuel content and calcination procedure on phase composition and microscopic structure of LiMn2O4 was studied. X-ray diffraction patterns showed that fuel content had no obvious influence on the grain size and phase purity of LiMn2O4. Higher calcination temperature led to higher phase purity, lager grain size, and better crystallization of resultant LiMn2O4. Below 600°C the effect of calcination time was inconspicuous, which became notable above 700°C. Scanning electron microscope images showed that nanocrystalline LiMn2O4 was obtained when the calcination temperature was lower than 600°C and the grain size increased at higher temperatures.

Abstract: Spinel LiMn2O4 powders were prepared by solution combustion synthesis using nitrate and acetate salts as raw materials and urea as fuel. The phase composition of as-synthesized powders was identified by XRD and the microscopic structure was examined by SEM. Single-phase spinel LiMn2O4 was prepared when acetate salts were used, and the incorporation of nitrate salts resulted in the formation of Mn2O3. The products consisted of slight agglomerations of fine particles with the size of 50-200nm. It was found that the addition of nitrate salts increased the reaction rate and the yield of LiMn2O4 was depressed when more nitrate salts were used as a reactant.