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首页> 外文期刊>Physica status solidi, B. Basic research >Equilibration kinetics of TiO2 single crystal at elevated temperatures
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Equilibration kinetics of TiO2 single crystal at elevated temperatures

机译:TiO2单晶在高温下的平衡动力学

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The equilibration kinetics of single-crystal TiO2 were determined in the rapid kinetics regime (within the first 10 h) within narrow ranges of oxygen activities, p(O-2), under the conditions of 1198-1323 K and p(O-2) = 10(-10_)10(5) Pa. The determined chemical diffusion coefficient, D-chem, is observed to exhibit a complex dependence on p(O-2). Comparison of D-chem for single-crystal and polycrystalline TiO2 demonstrates that the grain boundaries have a retarding effect on the transport of defects, The present work represents the first assessment of the effect of nonstoichiometry on well defined D-chem for TiO2 within a wide range of p(O-2). (c) 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
机译:在1198-1323 K和p(O-2)的条件下,在较窄的氧气活度p(O-2)的快速动力学范围内(前10小时内)确定了单晶TiO2的平衡动力学。 )= 10(-10_)10(5)Pa。观察到确定的化学扩散系数D-chem对p(O-2)表现出复杂的依赖性。对单晶和多晶TiO2的D-chem的比较表明,晶界对缺陷的传输有延迟作用。本工作代表了非化学计量学对宽范围内TiO2定义明确的D-chem的影响的首次评估。 p(O-2)的范围。 (c)2005 WILEY-VCH Verlag GmbH&Co. KGaA,Weinheim。

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