【摘要】 采用光学浮区法生长了尺寸为(6~8)mm×(40~80)mm的Ba1-xSrxTiO3晶体(x=0、0.01、0.016、0.02),并对其生长温度、旋转速度、生长速度等生长工艺参数进行了研究。实验过程中固液面稳定,X射线双晶摇摆曲线显示样品具有较好的晶体质量。XRD测试显示Sr2+的掺入能够抑制BaTiO3六方相的生成,BaTiO3四方相衍射峰向高衍射角方向移动。各组分晶体样品红外透过率超过80%。拉曼光谱显示存在峰值为489~496 cm-1的峰,这可以被认为是三方相的存在证据,这一变化应该为Sr2+的掺入所导致的。更多还原

【Abstract】 Ba1-xSrxTiO3crystals were grown by optical floating zone method.The grown crystals of Ba1-x SrxTiO3(x = 0,0.01,0.016,0.02) up to 6-8 mm in diameter and up to 40-80 mm in length was obtained.In the process of experiments the solid-liquid interface is convex to the melt,and X-ray double crystal rocking curve shows that the samples have good quality.Some parameters like growth temperature,growth speed and rotational speed were optimized.Substitution of Sr2 +for Ba2 +in BaTiO3was effective in preventing the formation of the hexagonal phase.The infrared transmittance of each component crystal samples were over 80%.The line,489-496 cm-1,has been observed by Raman scattering.A conclusion can be made that there is rhombohedral phase which is related to the Srdependent.更多还原