含铁灰尘招来冰河世纪

想象一下,富含铁的灰尘从风中飘来，最后落人大海。在海里，它滋养着那些需要从空气中吸收二氧化碳的生物。随着时间的推移，大气中的此类温室气体大量消失，它们所属的星球开始冷却。这是科学家最新的研究成果。     

Zn-Fe合金镀层的电沉积及耐蚀性研究

研究了在碱性锌酸盐溶液中加入含 Fe添加剂后,Zn-Fe合金的电沉积过程及镀层含 Fe量的影响因素。结果表明,含 Fe质量百分比为 0.4 %～ 0.8%的 Zn-Fe合金镀层的耐蚀性至少是普通镀锌层的 2倍。根据镀层的腐蚀形貌,初步探讨了合金镀层的耐蚀机理     

Synthesis of Iron-containing Carbon Microparticles from Deoiled Asphalt and Ferrocene

The deoiled asphalt as the carbon source and the ferrocene as the metal source and the catalyst precursor were chosen to synthesize iron-containing carbon microparticles through co-carbonization at the temperature of about 450℃ for 3 h. The resulting products were treated at 2 000 ℃ for 2 h. All samples were examined by high resolution transmission electron microscopy （HRTEM） and X-ray diffraction （XRD）. The results show that the iron particles in the heat-treated material are completely coated by carbon. In addition to the fully filled carbon microparticles as well as hollow carbon ones, also form carbon fibers with hollow centers. The formation mechanism of the as-prepared products was discussed briefly.