简介：作为材料的重要性质之一，硬度一直受到人们广泛的重视和研究。Cohen和Liu利用第一性原理计算从理论上预言了一种超硬性能的新材料β—C3N4，其体积弹性模量超过金刚石。CVO3组采用微波等离子体化学气相沉积法(MPCVD)，用高纯N2(99．999％)和CH4(99．9％)作反应气体，在单晶Si(100)和多晶Pt衬底上沉积碳氮薄膜，开展了对β-C3N4薄膜的制备与表征的探索性研究，取得了一定的进展。

简介：InordertocontrolthesizeanddistributionofthehighconductiveFe2PinLiFePO4/Fe2Pcomposite,twodifferentcoolingrates(Fast:15℃·min-1,Slow:2℃·min-1)wereemployedaftermechanicalalloying.Thedischargecapacityofthefastcooledwas83mAh·g-1andtheslowcooled121mAh·g-1.TheparticlesizeofthesynthesizedpowderwasexaminedbytransmissionelectronmicroscopyanddistributionofFe2Pwascharacterizedusingscanningelectronmicroscopy(SEM).Inaddition,two-stepheattreatmentwascarriedoutforbetterdistributionofFe2P.X-raydiffraction(XRD)andRietveldrefinementrevealthatLiFePO4/Fe2Pcompositeconsistsof95.77%LiFePO4and4.33%ofFe2P.