Growth conditions and luminescence of ZnO crystals grown by electric current heating with thermite reaction

被引：2
|
作者：
Minato, K [1 ]
Nezaki, D [1 ]
Okamoto, T [1 ]
Takata, M [1 ]
机构：
[1] Nagaoka Univ Technol, Dept Elect Engn, Nagaoka, Niigata 9402188, Japan
来源：
ELECTROCERAMICS IN JAPAN VI | 2003年 / 248卷
关键词：
zinc oxide; aluminum; electric current heating method; thermite reaction;
D O I：
10.4028/www.scientific.net/KEM.248.95
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Aluminum (Al) powder was placed on the zinc oxide (ZnO) ceramic bar (I mmx1 mmx15 mm). When a certain current flowed through the bar, a cluster of ZnO crystals grew on the Al powder. The diameter and length of the cluster were about 0.5 and 2.0 mm, respectively. It was found that the cluster grew under current densities of 70 - 100 A/cm(2) and oxygen partial pressures of 10 - 20 kPa. By the measurement of photoluminescence (PL), a well-known visible emission and an ultraviolet (UV) emission near the band edge region were observed around the bottom of the cluster of ZnO crystals. In contrast, the UV emission dominated the spectra at the top of the cluster.
引用
收藏
页码：95 / 98
页数：4
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