ZrO_2－Y_2O_3纳米晶的制备及其湿敏性能  

Preparation and Humidity Sensitive Propertles of Nanocrystalline ZrO_2-Y_2O_3 Powders

作　　者：廖秉良[1] 裘炳毅[1] 高志红 徐向明 

机构地区：[1]华南师范大学实验中心

出　　处：《功能材料》1995年第5期445-448,共4页Journal of Functional Materials

基　　金：广东省科委科学基金;广东省高教厅资助

摘　　要：以化学共沉淀法为基础，配合高速剪切均质并添加表面活性剂制备了粒径为２０～４０ｎｍ的ＺｒＯ＿２－Ｙ＿２Ｏ＿３纳米晶，经ＸＲＤ分析为稳定立方相结构。用ＺｒＯ＿２－Ｙ＿２Ｏ＿３纳米晶为感湿材料制作了厚膜型湿敏元件，测试结果表明：（１）元件电阻随相对湿度上升而下降。（２）在总电导中．离子电导占主要成分。（３）元件有较快的感湿响应速度。Nanocrystalline ZrO_2-Y_2O_3 powderswere preparedbyChemical coprecipitation methodwith cornbination of surfactant additives and highspeed homogenizer.The nanocrystalals werecharacterized by TEM and XRD。The article sizewas 20-40 nm.Stabilized cubic phase were obtained。Thck film humiditv sensors were made ofnanocrystalline ZrO_2-Y_2O0;powders。Their humiditysensitive properties were inyestigated.The resuItsare obtained as follows,(1)The sensor resistancedecreases withincrease of relative humidity.(2)Theionic conductance is predominant in the totalconductance.(3)The sensor has high speed response to various humidities.

关 键 词：化学共沉淀 纳米晶 湿敏性能 陶瓷半导体 

分 类 号：TN304.82[电子电信—物理电子学]