光折变材料BaTiO_3单晶生长及品质鉴定

THE GROWTH AND CHARACTERITATION OF PHOTOREFRACTIVE BaTiO_3 SINGLE CRYSTAL

四方相BaTiO_3单晶是一种新型非线性光学晶体,由于其强的非线性而在光学应用方面具有许多潜在的用途。 本文报道了以两种合成的BaTiO_3为原料,采用顶部籽晶熔盐生长技术进行块状BaTiO_3单晶生长研究。对生长出的晶体进行了结构和成份分析以及结晶学表征,并测量了Curie温度和透光率。

Tetragonal single crystal of barium titanate (BaTiO_3) is a kind of newly developed nonlinear optical crystals, which may be used extensively in optics because of its wide range of nonlinearity.In this paper, the growth of bulk BaTiO_3 single crystals by top-seeded solution growth technique, using two synthetic raw materials, is described. Structural and component analyses, crystallographic characterization and the measurement of Curie temperature and transmittance for the as-grown crystals are reported. The optimal conditions for growing excellent BaTiO_3 single crystals are proposed.