Determination of the Oxygen Self‐Diffusion Coefficients in Y2O3‐Containing Tetragonal Zirconia Polycrystals by Raman Spectrometric Monitoring of the 16O‐18O Exchange Reaction
Determination of the Oxygen Self‐Diffusion Coefficients in Y2O3‐Containing Tetragonal Zirconia Polycrystals by Raman Spectrometric Monitoring of the 16O‐18O Exchange Reaction
复制标题
通过拉曼光谱监测 16O-18O 交换反应测定含 Y2O3 四方氧化锆多晶中的氧自扩散系数
DOI：
10.1111/j.1151-2916.1993.tb08345.x
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发表时间：
1993
影响因子：
3.9
通讯作者：
H. Hamaguchi
中科院分区：
文献类型：
--
作者：
Byung‐Kook Kim;S. Park;H. Hamaguchi
本文提出了一种测定氧化物中氧自扩散系数D的新方法。该方法是基于拉曼光谱结合16 O-18 O交换技术。通过使用依赖于时间的18 O2浓度测量在准原位方式由拉曼光谱，计算的氧自扩散系数。计算中考虑了表面交换反应的影响和气体体积的限制。在含2.8mol/ %Y_2 O_3的四氧化二锆多晶中得到的结果是D = 1.55（+0.07-0.07）× 10 ~（-2）exp[（-120.0 0 0.4）（kJ/mol）/RT] cm ~ 2/sec。结果表明，拉曼光谱是测定氧化物中氧自扩散系数的有效工具。
A new method of determining the oxygen self-diffusion coefficients (D) in oxides has been developed. The method is based on Raman spectroscopy combined with the 16O–18O exchange technique. By using the time dependent 18O2 concentration measured in a quasi in situ manner by Raman spectroscopy, the oxygen self-diffusion coefficients are calculated. The calculation takes into account the influence of the surface exchange reaction and the limited gas volume. The result obtained in 2.8 mo1% Y2O3-containing tetragonal zirconia polycrystals is D = 1.55 (+0.07-0.07) x 10-2 exp[(-120.0 0.4) (kJ/mol) /RT] cm2/sec. It was demonstrated that Raman spectroscopy is useful tool for determining the oxygen self-diffusion coefficients in oxides.