摘要
晶界空间电荷层在高纯的稳定化ＺｒＯ２的晶界电阻中起着重要作用，以此为基础，提出了一个稳定化ＺｒＯ２的晶界导电模型，根据这个模型分析了Ｃａ，Ｙ和Ａｌ的晶界偏聚对稳定化ＺｒＯ２的晶界导电性的影响，并同时分析了被广泛应用的以Ｂａｕｅｒｌｅ等效电路为基础的晶界电阻测量方法的局限性，以及一些晶界性能表征参量的物理意义及欠妥之处．
Abstract In stabilized ZrO 2 with high purity, the space charge contribution plays a dominating role in the grain boundary resistance. A grain boundary conduction model is proposed on the basis of this concept, and the effect of the segregations of calcium, yttrium and aluminium on the space charge conduction is discussed, the segregations are all found to decrease the space charge conduction, thus increase the grain boundary resistance. Some formerly established concepts are evaluated via the model, the limitation of the complex impedance approach based on the Bauerle′s equivalent circuit is pointed out, and the defect of the concept of the resistance per unit interface area of the grain boundaries is also discussed.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第8期1332-1338,共7页
Acta Physica Sinica
基金
国家自然科学基金
湖北省自然科学基金
