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首页> 外文期刊>Russian journal of electrochemistry >Proton transport in doped yttrium oxide. Monte-carlo simulation
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Proton transport in doped yttrium oxide. Monte-carlo simulation

机译:掺杂氧化钇中的质子传输。蒙特卡洛模拟

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摘要

The Monte-Carlo technique is used to calculate the dependences of the tracer diffusion coeffi- cient D~* and conductivity σ of protons on the temperature and content x of the acceptor dopant in oxides with the structure of distorted fluorite ('bixbyite' structure). Analysis is carried out for the calcium doped Y_2O_3 oxide as an example. The effect of dopant-generated traps (different energy states for protons) and also the effect of site blocking due to interaction of protons between themselves and with oxygen vacancies are considered. It is shown that mobility of protons decreases significantly as a result of doping already at low x ? 1 mol %. The behavior of conductivity noticeably depends on the distribution of dopant ions over nonequiv- alent cation sites in the lattice. The predominant dopant distribution over the sites of the same type accounts for the appearance of a maximum in the dependence of σ(x) when correlations are taken into account.
机译:蒙特卡罗技术用于计算示踪剂扩散系数D〜*和质子电导率σ与萤石畸变萤石结构(“方铁矿”结构)中氧化物的温度和受主掺杂剂含量x的相关性。 。以掺杂钙的Y_2O_3氧化物为例进行分析。考虑了掺杂剂产生的陷阱(质子的不同能量状态)的影响,以及由于质子彼此之间以及与氧空位的相互作用而引起的位阻的影响。结果表明,由于已经在低xγ处掺杂,质子的迁移率显着降低。 1摩尔%。电导率的行为明显取决于掺杂离子在晶格中非等效阳离子位点上的分布。当考虑相关性时,在相同类型的位点上的主要掺杂剂分布会导致出现最大的σ(x)依赖性。

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