用Raman光谱研究了温度和掺杂物浓度对SrO和MgO掺杂LaGaO3固体电解质晶体结构的影响。结果表明 :增加掺杂物浓度以及升高温度都将增加LaGaO3本体结构的对称性。SrO/MgO复合掺杂和MgO单一掺杂的LaGaO3具有菱方钙钛矿结构 ,而单一掺杂SrO和未掺杂的LaGaO3具有斜方钙钛矿结构。在 15 0℃附近观察到了LaGaO3从斜方转变成赝三方结构的相变过程 ,而复合掺杂LaGaO3的结构对称性随温度的升高也有所增加。此外 ,在掺杂LaGaO3的Raman光谱中 ,在 5 2 0 ,75 0 ,810cm- 1 附近观察到了新的非本征吸收峰 ,这可能和体系中产生氧空位导致局部对称性下降有关 The effect of temperature and dopant concentration on the crystal structure of LaGaO3 solid electrolyte doped with SrO and MgO was investigated by Raman spectroscopy. The results show that increasing the dopant concentration and increasing the temperature will increase the symmetry of the bulk structure of LaGaO3. LaGaO3 doped with SrO / MgO and doped with MgO has a rhombic perovskite structure, while single doped SrO and undoped LaGaO3 have a rhombic perovskite structure. The phase transformation of LaGaO3 from rhombohedral to pseudo-tripartite was observed near 15 0 ℃. The structural symmetry of LaGaO3 doped with LaGaO3 also increased with increasing temperature. In addition, in the Raman spectra of doped LaGaO3, new extrinsic absorption peaks were observed near 5 2 0, 75 0 and 810 cm -1, which may be related to the decrease of local symmetry due to oxygen vacancies in the system