Electrical conductivity of UO2-ThO2 solid solutions
Electrical conductivity of UO2-ThO2 solid solutions
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UO2-ThO2固溶体的电导率
DOI：
10.1016/0022-3115(73)90144-x
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发表时间：
1973
影响因子：
3.1
通讯作者：
H. M. Lee
中科院分区：
文献类型：
--
作者：
H. M. Lee
在800 ~ 1200℃的温度范围内，测量了处于气相热力学平衡的UO 2+ x、tho2及其固溶体的电导率随温度和氧分压的变化规律。图中log α随1/T的斜率在UO 2+ x和富UO 2固溶体中呈单一区域，而在富UO 2固溶体中呈两个区域。电导率(σ)的压力依赖性UO财固体的解决方案可以用σ∝我[O]∝p O 2 1 2的0.01 < x < 0.1。这里，O i是间隙氧，p O 2是氧的分压，它随ThO 2含量的变化而变化。在与化学计量的较大偏差（x小于0.1）处，u4 O 9或（Th U） 4 O 9相的存在影响电导率数据。在tho2或富tho2的固溶体中。在高氧压下的p型传导被解释为由于过量氧气进入氧空位而引起的。
The electrical conductivities of UO 2+ x. ThO 2 and their solid solutions, in thermodynamic equilibrium with the gas phase, were measured as a function of temperature, and of oxygen partial pressure in the temperatnre range 800 to 1200° C. The slope of the plot log α versus 1/T for UO 2+ x and UO 2-rich solid solutions exhibits a single region, whereas in the ThO 2-rich solid solutions it exhibits two regions. The pressure dependence of the conductivity (σ) in the UO 2-rich solid solutions can be represented by σ∝[O i]∝ p o 2 1 2 in the range of 0.01< x< 0.1. Here, O i is an interstitial oxygen and p o 2 the partial pressure of oxygen, and it varies with the ThO 2 content. At greater deviation from stoichiometry (x⩾ 0.1) the presence of U 4 O 9 or (Th U) 4 O 9 phases influences the conductivity data. In ThO 2 or ThO 2-rich solid solutions. P-type conduction at high oxygen pressures is interpreted as arising from the incorporation of excess oxygen into oxygen vacancies.