Nonlinear optical crystal fluorine boron beryllium salt and its preparation process and use
AssigneeFujian Institute of Research On the Structure of Matter, Chinese Academy of Sciences
InventorsNing Ye, Guang Peng, Min Luo, Ge Zhang, Yu Chen
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Abstract
Crystalline NH4Be2BO3F2 or Be2BO3F (abbreviated as BBF) has nonlinear optical effect, is not deliquescent in the air, is chemically stable. They can be used in a variety of nonlinear optical fields and will pioneer the nonlinear optical applications in the deep UV band.
Claims13
A fluorine boron beryllium salt, having a chemical formula of Be2BO3F, and is a nonlinear optical crystal having a trigonal structure, wherein the nonlinear optical crystal crystallizes in a non-centrosymmetrical structure with a space group of R32, and cell parameters of a=4.4398 Å, b=4.4398 Å, c=12.4697 Å, α=β=90° , γ=120° , z=3, and unit cell volume (V)=212.87 Å3.
A process for preparing ammonium beryllium borate fluoride having a chemical formula of NH4Be2BO3F2 comprising:
- preparing raw materials NH4F, BeO and H3BO3,
- adding the raw materials into a hydrothermal kettle, followed by addition of water,
- raising the temperature to 150-240° C., keeping the temperature constant for 5 to 7 days;
- cooling followed by separating solid from liquid and washing to obtain the ammonium beryllium borate fluoride compound.
Dependencies are inferred from the claim text.