Preparation method and application of hydrated lithium borate nonlinear optical crystal
A technology of nonlinear optics and hydrated lithium borate, which is applied in the field of preparation of nonlinear optical crystals, can solve the problems of slow growth, unseen, and high cost, and achieve the effects of fast growth, good quality, and low cost
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Embodiment 1
[0037] According to the chemical reaction formula LiOH·H 2 O + H 3 BO 3 + 5H 2 O → Li(H 2 O) 4 B(OH) 4 2H 2 O as an example, the specific operation steps are as follows:
[0038] a. Put boric acid, DL-malic acid and lithium hydroxide monohydrate in a 23 mL high-pressure hydrothermal kettle lined with polytetrafluoroethylene, and then add 3 mL of deionized water to make them fully mixed;
[0039] b. Transfer the mixed solution in step a to a high-pressure reactor, place it in an oven, raise the temperature to 150°C at a rate of 20°C / h for 3 days, and then reduce the temperature to 10°C / h at a rate of 10°C / h. At room temperature, a solution containing colorless crystals was obtained;
[0040] c. Filter the crystal solution obtained in step b, and wash with deionized water or absolute ethanol to obtain a colorless and transparent single crystal.
Embodiment 2
[0042] According to the chemical reaction formula 2LiOH·H 2 O + B 2 o 3 + 13H 2 O→ 2[Li(H 2 O) 4 B(OH) 4 2H 2 O] as an example, the specific operation steps are as follows:
[0043] a. Put boron oxide, DL-malic acid and lithium hydroxide monohydrate in a 23 mL high-pressure hydrothermal kettle lined with polytetrafluoroethylene, and then add 3 mL of deionized water to make them fully mixed;
[0044] b. Transfer the mixed solution in step a to a high-pressure reactor, place it in an oven, raise the temperature to 140°C at a rate of 10°C / h for 3 days, and then reduce the temperature to 140°C at a rate of 5°C / h. At room temperature, a solution containing colorless crystals was obtained;
[0045] c. Filter the crystal solution obtained in step b, and wash with deionized water or absolute ethanol to obtain a colorless and transparent single crystal.
Embodiment 3
[0047] With the chemical reaction formula Li 2 CO 3 + 2H 3 BO 3 +13H 2 O →2[Li(H 2 O) 4 B(OH) 4 2H 2 O] + CO 2 For example, the specific operation steps are as follows:
[0048] a. Put boron oxide, DL-malic acid and lithium carbonate in a 23 mL high-pressure hydrothermal kettle lined with polytetrafluoroethylene, and then add 4 mL of deionized water to make them fully mixed;
[0049] b. Transfer the mixed solution in step a to a high-pressure reactor, place it in an oven, raise the temperature to 150°C at a rate of 30°C / h for 3 days, and then lower it to room temperature at a rate of 10°C / h to obtain solutions containing colorless crystals;
[0050] c. Filter the crystal solution obtained in step b, and wash with deionized water or absolute ethanol to obtain a colorless and transparent single crystal.
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