CHARACTERIZATION OF DEGRADED SURFACES OF AL AND AIN ULTRAFINE POWDERS

被引：7

作者：

SAKKA, Y

OKUYAMA, H

UCHIKOSHI, T

OHNO, S

机构：

[1] Chemical Processing Division, National Research Institute for Metals, Tsukuba, Ibaraki, 305, 1-2-1, Sengen

来源：

NANOSTRUCTURED MATERIALS | 1995年 / 5卷 / 05期

关键词：

D O I：

10.1016/0965-9773(95)00268-J

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Aluminum (Al) and aluminum nitride (AlN) ultrafine powders (UFPs) were synthesized by an active plasma-metal reaction method. Temperature-programmed gas Desorption (TPD) measurements were conducted for the Al and/or AlN UFPs after exposure to air. H2O gas for AlN UFPs and H2O and H-2 gases for (Al+AlN) UFPs were mainly defected. The surface chemistry of the powders after exposure to air is estimated in comparison of the desorption characteristics with infrared spectrometry spectra. The evolved H-2 around 420 degrees C from the (Al+AlN) UFPs is due to the reaction of H2O with inner Al. The evolved H2O is considered to be formed by the reaction of adsorbed H2O on surface oxide of the powders and decomposition of hydroxide-like compounds.

引用

页码：577 / 588

页数：12

共 27 条

[1] SYNTHESIS AND PROPERTIES OF ULTRAFINE AIN POWDER BY RF PLASMA [J].