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采用提拉法生长 β Zn3BPO7(简称ZBP)晶体。研究了生长工艺 ,用 [2 10 ]方向的籽晶 ,获得了尺寸为 35mm× 2 0mm× 10mm的单晶 ,该晶体无色透明 ,不开裂 ,呈现发育完好的 { 0 0 1}板面。通过设计特殊的温场以及在生长结束后采用适当的热条件有效地抑制了相变的发生。生长过程中靠近液面的温度梯度为 30～ 6 0℃ /cm ,晶体转速为 15～ 2 5r/min ,提拉速度不大于 1mm/h。ZBP晶体有宽的透光范围 ,它的紫外吸收边为 2 4 0nm。ZBP晶体不潮解 ,其莫氏硬度为 5Mohs。
The Czochralski method was used to grow β Zn3BPO7 (ZBP) crystal. The growth process was studied. A single crystal with a dimension of 35mm × 20mm × 10mm was obtained from seed in the direction of [2 10]. The crystal was colorless, transparent and not cracked, and developed well-developed {0 0 1} plate. By designing a special temperature field and using appropriate thermal conditions at the end of growth, phase transitions are effectively suppressed. During the growing process, the temperature gradient near the liquid surface is 30 ~ 60 ℃ / cm, the crystal rotation speed is 15 ~ 25r / min and the pulling speed is not more than 1mm / h. ZBP crystals have a wide range of light transmission, and its UV absorption edge is 240nm. ZBP crystals do not deliquesce and have a Mohs hardness of 5 Mohs.