Compound lithium rubidium phosphate nonlinear optical crystal and preparation method and use
A technology of nonlinear optics and lithium rubidium phosphate, applied in nonlinear optics, chemical instruments and methods, optics, etc., can solve problems such as nonlinear optical crystals that have not yet been obtained
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Embodiment 1
[0032] According to the reaction formula Li 2 CO 3 +2NH 4 h 2 PO 4 +2Rb 2 CO 3 →2LiRb 2 PO 4 +3CO 2 ↑+2H 2 O↑+2NH 4 ↑+0.5O 2 ↑Synthetic compound LiRb 2 PO 4 ; Using solid-phase synthesis method:
[0033] a. Will Li 2 CO 3 , NH 4 h 2 PO 4 , Rb 2 CO 3 Weigh it into a mortar with a molar ratio of 1:2:2, mix and grind it carefully, then put it into an open corundum crucible of Φ100mm×100mm, put it into a muffle furnace, slowly raise the temperature to 400°C, and keep the temperature for 12 hours , take out the crucible after cooling, at this time the sample is relatively loose, then take out the sample and grind it evenly, then put it in the crucible, keep the temperature in the muffle furnace at 550°C for 48 hours, take it out, and then get LiRb 2 PO 4 Powder, ground in a mortar for X-ray analysis, the obtained X-ray spectrum is consistent with that of LiRb 2 PO 4 The X-ray spectra obtained by the single crystal structure are consistent;
[0034] Preparat...
Embodiment 2
[0042] According to the reaction formula LiNO 3 +NH 4 h 2 PO 4 +Rb 2 CO 3 →LiRb 2 PO 4 +CO 2 ↑+NO 2 ↑+H 2 O↑+NH 4 ↑+0.5O 2 ↑Synthetic compound LiRb 2 PO 4 , and the specific operation steps are carried out according to embodiment 1 step a:
[0043] Preparation of LiRb by Pulling Method 2 PO 4 Crystal:
[0044] B, the LiRb that step a is synthesized 2 PO 4 Put the compound into an open platinum crucible of Φ100mm×100mm, heat it to a temperature of 750°C at a heating rate of 20°C / h, keep the temperature at a constant temperature for 10h, and then cool it down to 690°C to obtain a lithium rubidium phosphate melt;
[0045] c. Preparation of lithium rubidium phosphate seed crystals: Slowly lower the lithium rubidium phosphate melt obtained in step b to room temperature at a rate of 0.5°C / h, use the hanging platinum wire method to obtain small crystals during the cooling process, and spontaneously crystallize to obtain seed crystals ;
[0046] d. Growing crystals...
Embodiment 3
[0051] According to the reaction formula LiOH+NH 4 h 2 PO 4 +Rb 2 O→LiRb 2 PO 4 +1.5H 2 O↑+NH 4 ↑+0.25O 2 ↑Synthetic compound LiRb 2 PO 4 , the specific operation steps are carried out according to embodiment 1 step a:
[0052] Preparation of LiRb by Kyropoulos method 2 PO 4 Crystal:
[0053] b. The synthesized LiRb 2 PO 4 Put the compound into an open platinum crucible of Φ100mm×100mm, heat it to a temperature of 700°C at a heating rate of 20°C / h, keep the temperature at a constant temperature for 4h, and then cool it down to 680°C to obtain a lithium rubidium phosphate melt;
[0054] c. Preparation of lithium rubidium phosphate seed crystals: Slowly lower the lithium rubidium phosphate melt obtained in step b to room temperature at a rate of 1.5°C / h. During the cooling process, use the hanging platinum wire method to obtain small crystals, and spontaneously crystallize to obtain seed crystals ;
[0055] d. Growing crystals on the surface of the compound melt:...
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