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| 1 | Synthesis and Performance of Polyurethane Coated Urea as Slow/controlled Release Fertilizer显示文摘Polyurethane coated urea slow/controlled release fertilizer was prepared based on urea granules, isocyanate, polyols and paraffin. Isocyanate reacted with polyols to synthesize the polyurethane skin layer on urea granules surface. Paraffin serves as a lubricant during syntheses of polyurethane skin layers. The structure and nutrient release characteristics of the polyurethane skin layers were investigated by FTIR, SEM and TG. Urea nitrogen slow-release behavior of the polyurethane coated urea was tested. The experimental results indicated that compact and dense polyurethane skin layers with a thickness of 10-15 μm were formed on urea surface, the urea nitrogen slow-release time can reach 40-50 days. Paraffin proves to play a key role in inhibiting water to penetrate into urea, but excessive addition would decrease the polyurethane crosslinking density. | 李青山 WU Shu RU Tiejun 王利民 XING Guangzhong WANG Jinming | 2012 | Journal of Wuhan University of Technology(Materials Science)2012，27，1： | 10 |
| 2 | Synthesis and performanceof polyurethane coated urea as slow/controlled release fertilizer显示文摘 | Li Qingshan Wu Shu Ru Tiejun | 2012 | Journal of Wuhan University of Technology:Material Science inEnglish2012，27，12： | 1 |
| 3 | Field-free switching through bulk spin−orbit torque in L10-FePt films deposited on vicinal substrates显示文摘L1_(0)-FePt distinguishes itself for its ultrahigh perpendicular magnetic anisotropy(PMA),enabling thermally stabile memory cells to scale down to 3 nm.The recently discovered“bulk”spin−orbit torques in L1_(0)-FePt provide an efficient and scalable way to manipulate the L1_(0)-FePt magnetization.However,the existence of an external field during the switching limits its practical application,and therefore field-free switching of L1_(0)-FePt is highly demanded.In this manuscript,by growing the L1_(0)-FePt film on vicinal MgO(001)substrates,we realize the field-free switching of L1_(0)-FePt.This method is different from previously established strategies as it does not need to add other functional layers or create asymmetry in the film structure.The dependence on the vicinal angle,film thickness,and growth temperature demonstrates a wide operation window for the fieldfree switching of L1_(0)-FePt.We confirm the physical origin of the field-free switching is due to the tilted anisotropy of L1_(0)-FePt induced by the vicinal surface.We also quantitatively characterize the spin-orbit torques in the L1_(0)-FePt films.Our results extend beyond the established strategies to realize field-free switching,and potentially could be applied to mass production. | Yongming Luo Yanshan Zhuang Zhongshu Feng Haodong Fan Birui Wu Menghao Jin Ziji Shao Hai Li Ru Bai Yizheng Wu Ningning Wang Tiejun Zhou | 2022 | Frontiers of physics2022，17，5： | 0 |
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