The influence of sintering temperature on Li diffusivity was investigated for two Li_0.29La_0.57TiO₃ samples sintered at 1400 °C and 1450 °C, respectively. Synchrotron radiation diffraction was used to get detailed insights into the crystal structure and the real structure and also into the subtle differences between the two samples. ⁷Li NMR relaxometry and ⁷Li PFG NMR were used to observe the local hopping of Li ions and the long-range transport, respectively. Our results show that the motion of Li ions inside the crystallites is very similar for both samples. The enhanced conductivity of the sample sintered at the higher temperature, as observed by impedance spectroscopy, is caused by the reduced density of grain boundaries.

研究了两个烧结温度分别为1400°C和1450°C的Li _0.29 La _0.57 TiO ₃样品的烧结温度对Li扩散率的影响。同步辐射衍射用于深入了解晶体结构和实际结构，以及两个样品之间的细微差别。⁷ Li NMR弛豫法和⁷Li PFG NMR分别用于观察Li离子的局部跳跃和远距离迁移。我们的结果表明，两种样品中锂离子在微晶内部的运动非常相似。如通过阻抗谱所观察到的，在较高温度下烧结的样品的增强的电导率是由降低的晶界密度引起的。