Zn_（1－y）Al_yO敏感材料的固溶及导电机制

SOLID SOLUBILITY AND CONDUCTIVE MECHANISM OF Zn_(1-y)Al_yO SENSITIVE MAIERIAL

用化学共沉淀法，经热处理制得Ｚｎ＿（１－ｙ）Ａｌ＿ｙＯ系敏感材料。实验发现，在ｙ＜０．０８区间内，材料的电阻降低幅度较大，当ｙ＞０．０８时，阻值开始随ｙ值增大而上升。ＸＲＤ分析表明Ｚｎ＿（１－ｙ）Ａｌ＿ｙＯ（Ｏ＜ｙ＜０．１）是固溶体，此体系中存在缺陷平衡，并探讨其导电机制。

This paper reports the investigation on relationship of conductive mechanism with solid solubilityin Zn_(1-y)Al_yO n-type semiconductor system prepared by co-precipitation method.It is found that the resistance of the system remarkably decreased while y<0.08,but it slowlyincreased as the range of y value was from 0.08 to 0.30 Zn_(1-y)Al_yO system with 0<y<0.10 is solidsolution as shown by XRD analysis According to the defect equilibrium theory,the reason of varianceinresistance and the conductive mechanism for this solid solution system are discusse.The pointdefect equilibrium equation exists in this solid solution system.