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钛酸钡钙(BCT)晶体是一种新型的光折变材料,由于其优于钛酸钡的电光性能及无室温相变的优势,使其具有更大的应用前景。本文从大量的实验中总结出生长高质量BCT晶体的生长条件,用Czochralski法生长出18mm×15mm的BCT晶体。通过粉末X射线衍射测定其晶格常数,由红外、紫外可见光透射谱确定其吸收边,并通过Raman光谱等一系列实验对晶体结构及其基本光学性能进行了研究。
Barium titanate (BCT) crystal is a new type of photorefractive material, which has more application prospects because of its superiority to electro-optic properties of barium titanate and the advantage of no phase transition at room temperature. In this paper, we summarize the growing conditions of high quality BCT crystals grown from a large number of experiments and use the Czochralski method to grow BC18mm × 15mm BCT crystals. The lattice constants were determined by powder X-ray diffraction. The absorption edge was determined by infrared and ultraviolet visible light transmission spectra. The crystal structure and its basic optical properties were studied by Raman spectroscopy and a series of experiments.