非线性光学晶体BiB3O6属单斜晶系,晶体的极性生长严重。采用不同方向的籽晶,晶体的形状、尺寸、质量和生长速度有着很大的差异。为了确定晶体的最佳生长方向,热膨胀性能被考虑。通过分析热膨胀椭球,[101]方向被确定为最佳籽晶方向。在适合的高温溶液条件和工艺参数下,沿着该方向,成功生长了尺寸为30mm×30mm×40mm、重120g的BiB3O6晶体。 Nonlinear optical crystals BiB3O6 is a monoclinic system, the polarity of the crystal growth. The use of different directions of the seed crystal, the shape, size, quality and growth rate are very different. In order to determine the best crystal growth direction, thermal expansion properties are considered. By analyzing the thermal expansion ellipsoid, [101] direction was determined as the best seed direction. Under the appropriate high temperature solution conditions and process parameters, BiB3O6 crystals with dimensions of 30mm × 30mm × 40mm and weight of 120g were successfully grown in this direction.