Kinetics of Oxygen Incorporation into SrTiO3 Investigated by Frequency-Domain Analysis
Kinetics of Oxygen Incorporation into SrTiO3 Investigated by Frequency-Domain Analysis
复制标题
通过频域分析研究氧掺入 SrTiO3 的动力学
DOI：
10.1007/s10832-004-5171-2
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发表时间：
2004
影响因子：
1.7
通讯作者：
E. Ivers-Tiffée
中科院分区：
文献类型：
--
作者：
S. F. Wagner;W. Menesklou;Th. Schneider;E. Ivers-Tiffée
氧掺入的动力学对于受主掺杂钛酸锶作为连续型氧传感器的应用是至关重要的。样品的电导率取决于环境氧分压repO2，这是由于气相和固态之间的氧交换导致电荷载流子的流动。掺入过程的动力学可以分为两个步骤：氧表面转移和随后的氧空位体扩散。慢阶跃的速率决定了整个掺入过程的动力学，从而决定了传感器的响应行为，提出了一种基于频域分析的动力学行为研究方法。在底层模型中，SrTiO 3单晶暴露于谐波调制的pO 2。这导致样品电导的调制。通过计算的方式，它示出的频率响应的形状清楚地允许区分是否氧掺入的动力学是由体扩散或由表面transfer.The实验验证该模型是由轻微的受主掺杂SrTiO 3单晶的各种厚度在不同温度下的动力学测量设置进行的调查证明。
The kinetics of oxygen incorporation are of fundamental importance for an application of acceptor doped strontium titanate as a resistive-type oxygen sensor. The electrical conductance of the sample depends on the ambient oxygen partial pressurepO2due to oxygen exchange between gas phase and solid state which leads to a flow of charge carriers. The kinetics of the incorporation process can be separated into two steps: the oxygen surface transfer and the subsequent bulk diffusion of oxygen vacancies. The rate of the slower step determines the kinetics of the overall incorporation process and thus the sensor’s response behavior.A method for the investigation of the kinetic behavior is presented which is based on a frequency-domain analysis. In the underlying model, a SrTiO3single crystal is exposed to a harmonically modulatedpO2. This leads to a modulation of the sample’s electrical conductance. By way of calculation, it is shown that the shape of the frequency response clearly allows to distinguish whether the kinetics of oxygen incorporation are determined either by bulk diffusion or by surface transfer.The experimental validation of this model is demonstrated by investigations performed on slightly acceptor doped SrTiO3single crystals of various thicknesses in a kinetic measurement setup at different temperatures.
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影响因子：
8.4
作者：
Izu, N;Shin, W;Murayama, N
通讯作者：
Murayama, N
DOI：
--
发表时间：
1993
期刊：
影响因子：
--
作者：
J. Maier
通讯作者：
J. Maier
表面转移反应对电阻式氧传感器响应特性的影响
DOI：
--
发表时间：
1992
期刊：
影响因子：
--
作者：
C. Tragut
通讯作者：
C. Tragut
氧化学计量变化的动力学
DOI：
--
发表时间：
2000
期刊：
影响因子：
--
作者：
J. Maier;J. Jamnik;M. Leonhardt
通讯作者：
M. Leonhardt