Large size barium borate bismuth nonlinear optical crystal and preparation thereof
A technology of nonlinear optics and barium bismuth borate, which is applied in chemical instruments and methods, borates, crystal growth, etc., can solve the problem that crystals cannot be purchased in the market, and the single crystal structure of compounds has not been seen, etc. question
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Embodiment 1
[0038] Synthesis of barium bismuth borate (BaBiBO 4 ) compounds:
[0039] The solid-state synthesis method is used to sinter at a high temperature of 630°C, and its chemical equation is: Ba(NO 3 ) 2 +H 3 BO 3 +Bi 2 o 3 →BaBiBO 4 +NO 2 ↑+H 2 O↑[(4) reaction formula]
[0040] Ba(NO 3 ) 2 、H 3 BO 3 、 Bi 2 o 3 Put it into a mortar in a stoichiometric ratio, mix and grind it carefully, then put it into a corundum crucible with an opening of Φ400mm×400mm, press it tightly, put it into a muffle furnace, slowly raise it to 500°C, keep the temperature for 24 hours, and wait for it to cool Take out the crucible, the sample is relatively loose at this time, then take out the sample and grind it evenly again, then put it in the crucible, keep the temperature in the muffle furnace at 650°C for 48 hours, take it out, put it in a mortar, mash and grind it to get barium bismuth borate compound. Carry out X-ray analysis to this product, gained X-ray spectrogram and finished pr...
Embodiment 2
[0044] According to the reaction formula BaO+H 3 BO 3 +Bi 2 o 3 →BaBiBO 4 +H 2 O ↑ Synthesis of BaBiBO 4 , the specific operation steps are carried out according to embodiment 1;
[0045] The synthesized BaBiBO 4 with flux Bi 2 o 3 Massive BaBiBO4 : Bi 2 o 3 = 1:3 for mixing, put it into an open platinum crucible of Φ200mm×200mm, put the crucible into a vertical heating furnace, seal the opening at the top of the furnace with insulating material, and the top of the furnace corresponds to the center of the crucible Leave a small hole for the seed rod to enter and exit, heat up to 800°C, keep the temperature for 100 hours and then quickly cool down to 750.1°C (0.1°C above the saturation temperature), cut the BaBiBO along the c-axis 4 The seed crystal is fixed on the lower end of the seed rod with a platinum wire, and the seed crystal is introduced into the crucible from a small hole on the top of the furnace to make it contact with the liquid surface, and the seed cry...
Embodiment 3
[0047] Formulating BaB 2 o 4 Flux:
[0048] Analytical pure Ba(NO 3 ) 2 and H 3 BO 3 Mixing by molar ratio, its mixing molar ratio is: Ba(NO 3 ) 2 :H 3 BO 3 =1:2, after mixing and grinding, sintering at a temperature of 650-700°C for 36 hours to make BaB 2 o 4 flux;
[0049] According to the reaction formula BaCO 3 +H 3 BO 3 +Bi 2 o 3 →BaBiBO 4 +CO 2 ↑+H 2 O ↑ Synthesis of BaBiBO 4 , the specific operation steps are carried out according to embodiment 1;
[0050] The synthesized BaBiBO 4 Flux formulated with BaB 2 o 4 Massive BaBiBO 4 :BaB 2 o 4 = 1:0.8 for mixing, put it into a platinum crucible with an opening of Φ100mm×100mm, put the crucible into a vertical heating furnace, seal the opening at the top of the furnace with insulating material, and the top of the furnace corresponds to the center of the crucible Leave a small hole for the seed rod to enter and exit, heat up to 600°C, keep the temperature for 72 hours and then quickly cool down to 58...
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