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首页> 外文会议>Fourth International Symposium on Ionic and Mixed Conducting Ceramics, null >DEFECT EQUILIBRIUM AND TRANSPORT PROPERTIES OF Nb DOPED SrTiO_3
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DEFECT EQUILIBRIUM AND TRANSPORT PROPERTIES OF Nb DOPED SrTiO_3

机译：掺Nb的SrTiO_3的缺陷平衡与输运性质。

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摘要

Electrical conductivity of single crystalline SrTi_(0.9998)Nb_(0.0002)O_(3-δ) was measured as a function of oxygen partial pressure and temperature from 573K to 1723K. At temperatures lower than 1000K, the electrical conductivity was not sensitive to the oxygen partial pressure, whereas, at higher temperatures, the conductivity increased with decreasing oxygen partial pressure due to the formation of electrons associated with the reduction of titanium. Defect chemistry analysis was used to interpret the conductivity variation. The electron mobility and the equilibrium constant of the red-ox reaction were obtained by the parameter fitting of the conductivity data. Thermally activated intrinsic electrons were also observed in the high temperature region. The results were compared with the literature data for undoped and La doped SrTiO_3.
机译：测量了单晶SrTi_（0.9998）Nb_（0.0002）O_（3-δ）的电导率，它是氧分压和温度从573K到1723K的函数。在低于1000K的温度下，电导率对氧分压不敏感，而在较高的温度下，由于与钛还原相关的电子的形成，电导率随氧分压的降低而增加。缺陷化学分析用于解释电导率变化。通过电导率数据的参数拟合获得氧化还原反应的电子迁移率和平衡常数。在高温区域也观察到热活化的本征电子。将结果与未掺杂和La掺杂SrTiO_3的文献数据进行比较。

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