De Souza Roger A, Pietrowski Martha J, Anselmi-Tamburini Umberto, Kim Sangtae, Munir Zuhair A, Martin Manfred
Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany.
Phys Chem Chem Phys. 2008 Apr 21;10(15):2067-72. doi: 10.1039/b719363g. Epub 2008 Feb 25.
The transport of oxygen in dense samples of yttria-stabilized zirconia (YSZ), of average grain size d approximately 50 nm, has been studied by means of 18O/16O exchange annealing and secondary ion mass spectrometry (SIMS). Oxygen diffusion coefficients (D*) and oxygen surface exchange coefficients (k*) were measured for temperatures 673<or=T/K<or=973 at an oxygen partial pressure of 900 mbar. No evidence is found for fast diffusion along grain boundaries. Rather, the analysis indicates that grain boundaries hinder oxygen transport.
通过(^{18}O/^{16}O)交换退火和二次离子质谱法（SIMS）研究了平均晶粒尺寸(d)约为(50)纳米的氧化钇稳定氧化锆（YSZ）致密样品中的氧传输。在氧分压为(900)毫巴的条件下，测量了(673\leq T/K\leq973)温度范围内的氧扩散系数（(D^)）和氧表面交换系数（(k^)）。未发现沿晶界快速扩散的证据。相反，分析表明晶界阻碍了氧传输。
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