As part of a study of mixed n-type electronic and ionic conductors, the conductivities of indium doped strontium ruthenium titanates were determined. The SrTi_1-x-yRu_xIn_yO_3-δ (x = 0.1–0.4, y = 0–0.2) compositions were prepared by conventional solid-state synthesis. Samples were determined to be of a single phase by X-ray powder diffraction and electron probe microanalysis. The temperature and pO₂ dependences of the electrical conductivities were investigated by using DC and AC four-probe methods. STRIO820 and STRIO640 have conductivity of 6.4 and 5.4 Scm⁻¹, respectively, at 900 °C and pO₂ = 1 atm. The conductivities of the In-doped samples under the same conditions were lower than that of SrTi_1-xRu_xO_3-δ by around two orders of magnitude. For STRIO622, when pO₂ was increased from 10⁻⁴ to 1 atm, the DC conductivities decreased, indicating n-type conduction. The pO₂ dependence of conductivity was analyzed using the relation σ_T = ApO₂^1/x + σ_i. STRIO622 shows significant ionic conductivity, with σ_i ∼0.21 Scm⁻¹ at 1000 °C. The DC conductivities of STRIO622 in reducing environments (5% H₂/N₂ saturated with water) show protonic conduction at low temperatures. The thermal expansion coefficients (TECs) were ∼8.9–11.2 × 10⁻⁶ K⁻¹ at 200 ≤ T ≤ 990 °C.

作为混合n型电子和离子导体研究的一部分，确定了铟掺杂锶钌钛酸盐的电导率。通过传统的固态合成方法制备了SrTi _1-xy Ru _x In _y O3 _-δ（x = 0.1-0.4，y = 0-0.2）组合物。通过X射线粉末衍射和电子探针显微分析确定样品为单相。通过使用直流和交流四探针方法研究了温度和电导率与pO _2的关系。STRIO820和STRIO640在900°C和pO ₂下的电导率分别为6.4和5.4 Scm ^-1 = 1个大气压。在相同条件下，In掺杂样品的电导率比SrTi _1-x Ru _x O3 _-δ的电导率低两个数量级。对于STRIO622，当pO ₂从10 ^-4增加到1 atm时，直流电导率降低，表明为n型导通。在PO ₂使用下面的关系进行分析的导电性依赖σ _Ť  = APO ₂ ^{1 / X}  +  σ_我。STRIO622节目显著离子传导性，与σ_我~0.21 SCM ^-1在1000℃。还原环境中STRIO622的直流电导率（5％H₂ / N ₂用水饱和）在低温下表现出质子传导。在200≤T≤990  °C的条件下，热膨胀系数（TECs）约为8.9-11.2×10 ^-6  K ^-1。