Jianrong Xiao
材料科学技术（英文）
Copper nitride (Cu3N) films were prepared by reactive radio frequency magnetron sputtering at various nitrogen partial pressures, and the films were annealed at different temperatures. The crystal structure of the films was identified by X-ray diffraction technique. The Cu3N films have a cubic anti-ReO3 structure, and lattice constant is 0.3855 nm. With increasing nitrogen partial pressure, the Cu3N films are strongly textured with the crystal direction [100]. The atomic force microscope images show that the films presence a smooth and compact morphology with nanocrystallites of about 70 nm in size. The films were further characterized by UV-visible spectrometer, and the optical band gap of the films was calculated from the Tauc equation. The typical value of optical band gap of the films is about 1.75 eV, and it increases with increasing nitrogen partial pressure. The thermal property of the films was measured by thermogravimetry, and the decomposition temperature of the films was about 530 K.
关键词:
Cu3N films
Jianrong Xiao
材料科学技术（英文）
Copper nitride (Cu3N) films were prepared by reactive radio frequency magnetron sputtering at various nitrogen partial pressures, and the films were annealed at different temperatures. The crystal structure of the films was identified by X-ray diffraction technique. The Cu3N films have a cubic anti-ReO3 structure, and lattice constant is 0.3855 nm. With increasing nitrogen partial pressure, the Cu3N films are strongly textured with the crystal direction [100]. The atomic force microscope images show that the films presence a smooth and compact morphology with nanocrystallites of about 70 nm in size. The films were further characterized by UV-visible spectrometer, and the optical band gap of the films was calculated from the Tauc equation. The typical value of optical band gap of the films is about 1.75 eV, and it increases with increasing nitrogen partial pressure. The thermal property of the films was measured by thermogravimetry, and the decomposition temperature of the films was about 530 K.
关键词:
Cu3N films
巨浩波
,
吕生华
,
孙婷
,
孔宪辉
高分子材料科学与工程
采用化学氧化还原法和超声分散制备出石墨烯(GN),采用X射线衍射仪、红外光谱和原子力显微镜对所得石墨烯进行了分析和表征.结果表明,氧化石墨烯被较好地还原为石墨烯并且成功分散为纳米级厚度;采用溶液超声共混法制备石墨烯/硅丙乳液复合材料.对复合材料成膜进行扫描电镜表征、热重分析、导电渗流测试、力学性能以及耐水、耐腐蚀性测试,发现复合材料具有较低的渗滤阈值(质量分数0.5％),石墨烯用量大于0.9％时,体积电阻率基本稳定在103Ω·cm以下,导电性有了明显提高;石墨烯的用量为0.7％时,与硅丙乳液相比,复合材料拉伸强度提高了15.5％,断裂伸长率下降了3.6％,耐水性提高了14％,失重5％时的热分解温度提高了43℃,耐腐蚀性能也得到了极大提高.
关键词:
石墨烯
,
硅丙乳液
,
热分解温度
,
力学性能
,
耐水性
,
导电性
陈宇飞
,
郭红缘
,
李志超
,
韩阳
,
汪波涛
,
楚洪月
复合材料学报
doi:10.13801/j.cnki.fhclxb.20160711.004
为研究聚醚砜(PES)增韧双马来酰亚胺(BMI)与环氧树脂(EP)体系的微观结构与性能,采用原位聚合法制得PES/BMI-EP复合材料.通过FTIR和SEM分析可知PES未与BMI-EP树脂发生化学反应,而是与BMI-EP分子间存在强烈的相互作用,并以两相结构存在,是多相复合材料.在PES/BMI-EP复合材料中,PES为分散相,相与相之间界面模糊,其断面裂纹不光滑方向发生改变,为典型的韧性断裂形貌;能谱测试结果证明PES与基体间存在相互渗透现象,PES均匀的分散于基体树脂中.力学测试分析结果显示:当PES含量为4 wt%时,PES在基体树脂中分散性较好,其弯曲强度与冲击强度达到最高,为144.9 MPa和19.7 kJ/m2,比BMI-EP基体树脂分别提高41.2%和90%;热失重测试结果显示,适量的PES能提高PES/BMI-EP复合材料的分解温度,过量添加不利于材料分解温度的升高.
关键词:
环氧树脂
,
双马来酰亚胺
,
聚醚砜
,
力学性能
,
分解温度
