采用坩埚下降法生长出了新型双折射晶体高温相偏硼酸钡α-BaB2O4单晶,尺寸为φ25mm×100mm,在He-Ne激光照射下无散射颗粒和生长条纹,在可见光区用复式宝石折射仪粗略测得该晶体的双折射率△n≈0.13,在200～900nm光区的透过率>80％.简要介绍了晶体生长的一些基本参数.
The high temperature phase barium metaborate α-BaB2O4 single crystal with 25mm in diameter, 100mm in height was grown by the Bridgman method. The data of crystal growth was briefly introduced. The results show that there is not any scattering particle examined under He-Ne laser in the crystal. And the birefractive index of this crystal in visible spectra is about △n≈0.13. The transmittance of the crystal obtained in 200～900nm is more than 80%.
参考文献
| [1] | ] Levin E M, et al. J. Research of the National Bureau of Standards, 1949, 42 (2): 131--132. [2] Wear C E, Schroeder P A. J. Research of the National Bureau of Standards, 1964, 68 (a): 465--466. [3] 周国清, 等. 材料研究学报, 2000, 14: 86--87. [4] 蒋民华. 晶体物理. 济南: 山东科学技术出版社, 1980. 229--230 |
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