测定了不同气氛烧结的SrTiO3 双功能陶瓷的正电子湮灭 (PAT)寿命谱 ,其平均寿命随着烧结气氛中H2含量的增加而减小 .这是还原烧结气氛使瓷体中形成较多的氧缺位 ,氧缺位捕获两个弱束缚电子形成F′ 色心所致 .弱束缚电子在禁带内形成局域能级 ,并使材料的电子浓度增大 .x衍射分析结果证明了材料晶体结构的变化 . The lifetime distribution of positron annihilation (PAT) spectrum of SrTiO3 bifunctional ceramic sintered at different atmospheres was measured, and its average life expectancy decreased with the increase of H2 content in the sintering atmosphere, which was the result of reducing the sintering atmosphere to form more oxygen Lack of position, oxygen vacancy capture two weakly bound electrons to form the F ’color center due to weak binding electrons in the forbidden band to form a local energy level and increase the electron concentration of the material.X diffraction analysis results show that the material crystal Structural changes.