无机材料学报

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SiC纳米粉表面研究

杨修春1,2; 韩高荣2; 李福燊1; 丁子上2; 周国治1   

  1. 1北京科技大学理化系; 北京 100083; 2浙江大学材料系; 杭州310027
  • 收稿日期:1996-12-26 修回日期:1997-02-26 出版日期:1998-02-20 网络出版日期:1998-02-20

Studies of the Surface of SiC Nanometer Powder

YANG Xiu-Chun1,2; HAN Gao-Rong2; LI Fu-Shen1; DING Zi-Shang2; ZHOU Guo-Zhi1   

  1. 1Department of Physical Chemistry; Science and Technology University Beijing Beijing 100082 China; 2Department of Materials Science and Engineering; Zhejiang Unversity Hangzhou 310027 Chine
  • Received:1996-12-26 Revised:1997-02-26 Published:1998-02-20 Online:1998-02-20

摘要: 借助于TEM、IR和XPS分析;对新鲜的SiC纳米粉表面和不同存放时间及处理条件下的样品表面进行分析比较,发现新鲜的作品表面主要以物理吸附氧为主(78.25%),化合态氧为辅(21.75%),在空气中存放一个月后,O/Si比由新鲜样品表面的0.49上升至0.70表面发生氧化,继续存放一个月,O/Si比增至0.77;但表面氧化速度变缓,在潮湿空气中SiC纳米粉更易氧化.离子刻蚀分析表明,O主要分布在粉末表面.

关键词: SiC纳米粉, 表面氧化, 物理吸附氧, 化合态氧

Abstract: The surface composition and bonding of a wide variety of SC nanometer powders were characterized by TEM, IR and XPS. The results show that oxygen mainly
exists in the form of physical adsorption for fresh SiC nanometer powder(adsorbed oxygen---78.25%, combined oxygen---21.75%). When the powder was kept in air for
a month, its O/Si mole ratio added from 0.49 to 0.70, when the powder was kept in air for two month, the O/Si mole ratio added to 0.77. The results show that the
oxidization of the powder becomes slower after a month. Oxidization of the powder is easier in wet air than in dry air. Oxygen content decreases with increasing Ar+
sputtering time, and oxygen is mainly distributed over the surface of the powder.

Key words: SiC nanometer powder, surface oxidization, adsorbed oxygen, combined oxygen

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