Effect of powder bed on the microstructure and electrical properties of Bi 2O 3- and Sb 2O 3-doped ZnO
Journal
Journal of Materials Science: Materials in Electronics
Journal Volume
20
Journal Issue
3
Pages
234-241
Date Issued
2009
Author(s)
Abstract
The effects of powder bed on the microstructure and electrical properties of Bi 2O 3- and Sb 2 O 3-doped ZnO specimens are investigated in the present study. By using a sufficient amount of powder bed, the weight loss of Bi 2O 3 reduces from >95 to <20%. The reduction of weight loss enhances significantly the densification and grain growth of ZnO. Furthermore, the use of powder bed can also reduce the size distribution of ZnO grains. Nevertheless, the presence of Bi 2O 3 residue results in the formation of a pyrochlore phase (Zn 2Bi 3Sb 3 O 14) during the cooling down stage; its presence is detrimental to the nonlinear characteristics of ZnO-Bi 2 O 3-Sb 2O 3 system. © Springer Science+Business Media, LLC 2008.
Type
journal article