The Solubility and Temperature Dependence of Resistivity for Aluminum‐Doped Zinc Oxide Ceramic

Abstract

The solubility of Aluminum (Al)‐doped ZnO ceramic was determined to be 0.9 atomic ratio percent (at.%), and the ZnAl2O4 was formed once the Al content achieved 1.0 at.% or above. The resistivity decreased at an Al content of 0–0.8 at.% to a minimum of 1.45 × 10−3 Ω, while increased at a range of 1.0–6.0 at.%. The resistivity increased and decreased with temperature when the Al content was below and above 2.0 at.%, respectively. The activation energy increased from −489.5 to −65.0 eV and from 66.0 to 293.8 eV when the Al doping content was below and above 2.0 at.%.