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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.

参考文献

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