Thermal ageing of nanostructured tetragonal zirconia ceramics: Characterization of interfaces
Thermal ageing of nanostructured tetragonal zirconia ceramics: Characterization of interfaces
复制标题
DOI：
10.1016/j.jeurceramsoc.2009.05.004
复制
发表时间：
2010
影响因子：
5.7
通讯作者：
R. A. Rocha;E. Muccillo;L. Dessemond;E. Djurado
中科院分区：
文献类型：
--
作者：
R. A. Rocha;E. Muccillo;L. Dessemond;E. Djurado
本文报道了在超声雾化器辅助下，采用喷雾热解法在较低温度下制备了3.5mol% Y2O3 掺杂ZrO2 纳米粉末，其微观结构可控。发现所制备的粉末为结晶状，由致密且化学均匀的球形颗粒组成。在空气中于 1500°C 下常规烧结 2 小时可产生平均晶粒尺寸为 83 nm 的致密陶瓷。电极/电解质界面的电性能通过在干燥空气中 700°C 热老化 2000 小时之前、期间和之后的阻抗谱测量来确定。研究了热老化对陶瓷和铂电极界面的电响应的影响。
This paper reports the preparation of nanometric powders of 3.5mol% Y2O3-doped ZrO2, with controlled microstructure, by the spray pyrolysis process, assisted by ultrasonic atomizer, at relatively low temperature. As-prepared powders were found crystalline and consisted of dense and chemically homogeneous spherical particles. Conventional sintering at 1500°C for 2h in air yields dense ceramics of 83nm of average grain size. The electrical properties of electrode/electrolyte interface were determined by impedance spectroscopy measurements before, during and after thermal ageing for 2000h at 700°C in dry air. The effect of thermal ageing on the electrical responses of the ceramic and interfaces with platinum electrodes was investigated.