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Nonlinear Optical Crystal Beryllium Sodium Cesium Borate

A nonlinear optics, beryllium borate technology, applied in nonlinear optics, optics, crystal growth and other directions, can solve the problems of poor optical uniformity, poor structural integrity, inability to apply, etc., and achieve the effect of good chemical stability

Active Publication Date: 2016-01-20
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They overcome the layered habit of KBBF single crystal growth, but these crystals have not been able to replace KBBF single crystals so far, because SBBO and TBO crystals have poor structural integrity, and their macroscopic properties show very poor optical uniformity. Cannot be used in real devices

Method used

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  • Nonlinear Optical Crystal Beryllium Sodium Cesium Borate
  • Nonlinear Optical Crystal Beryllium Sodium Cesium Borate
  • Nonlinear Optical Crystal Beryllium Sodium Cesium Borate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Synthesis of Compound Na by High Temperature Solid State Reaction 2 CaB 6 B 5 o 15

[0033]

[0034] Its chemical reaction equation is:

[0035] 2Na 2 CO 3 +Cs 2 CO 3 +12BeO+5B 2 o 3 = 2Na 2 CaB 6 B 5 o 15 +3CO 2 ↑

[0036] The specific operation steps are as follows: after weighing the above-mentioned raw materials according to the above-mentioned dosage in the operation box, put them into a mortar, mix them evenly and grind them carefully, then put them into a platinum crucible of Φ30×30mm, press it tightly with a medicine spoon and cover it , put it into the muffle furnace (the muffle furnace is placed in the fume hood, and the exhaust port of the fume hood is exhausted through the water tank), slowly raise the temperature to 500°C and pre-burn at a constant temperature for 3 hours. Cause the change of proportion, make the solid phase reaction fully proceed. Take out the crucible after cooling, and the sample is looser at this time. Then take out...

Embodiment 2

[0038] Synthesis of Compound Na by High Temperature Solid State Reaction 2 CaB 6 B 5 o 15

[0039]

[0040] Its chemical reaction equation is:

[0041] 2Na 2 CO 3 +Cs 2 CO 3 +12BeO+10H 3 BO 3 = 2Na 2 CaB 6 B 5 o 15 +3CO 2 ↑+15H 2 O↑

[0042] The specific operation steps are as follows: after weighing the above-mentioned raw materials according to the above-mentioned dosage in the operation box, put them into a mortar, mix them evenly and grind them carefully, then put them into a platinum crucible of Φ30×30mm, press it tightly with a medicine spoon and cover it , put it into the muffle furnace (the muffle furnace is placed in the fume hood, and the exhaust port of the fume hood is exhausted through the water tank), slowly raise the temperature to 500°C and pre-burn at a constant temperature for 3 hours. Cause the change of proportion, make the solid phase reaction fully proceed. Take out the crucible after cooling, and the sample is looser at this time. T...

Embodiment 3

[0044] Na crystals grown by the molten salt method 2 CaB 6 B 5 o 15

[0045] The crystal growth device is a self-made resistance wire heating furnace, and the temperature control device is a 908PHK20 programmable automatic temperature controller. Use Na 2 O-Cs 2 O-B 2 o 3 As a flux, spontaneous nucleation to obtain crystals.

[0046]

[0047] The specific operation steps are as follows: weigh the above-mentioned raw materials according to the above-mentioned dosage, mix them evenly, put them into a Φ60×60mm platinum crucible, place them in a self-made growth furnace, raise the temperature to 1000°C until the raw materials are completely melted, keep the temperature for 10 hours, and then cool down rapidly 5-10°C above the saturation temperature, then lower the temperature to 600°C at a rate of 3°C per day, and turn off the furnace. After the sample is cooled, the flux is washed away with dilute nitric acid and water to obtain a transparent NCBB single crystal. Exa...

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Abstract

The invention provides a novel nonlinear optical crystal beryllium-sodium-cesium borate of which the chemical formula is Na2CsBe6B5O15 (NCBB). The crystal structure of the novel nonlinear optical crystal belongs to a monoclinic system; the space group is C2; cell parameters are as follows: a=13.885 Angstrom, b=4.4332 Angstrom, c=10.874 Angstrom, alpha=gamma=90 DEG C, beta=103.141 DEG C, z=2, and the unit cell volume V=651.8 Angstrom<3>. A solid phase synthesis method is used for acquiring an NCBB compound by sintering at high temperature. A molten salt method is used for successfully growing a single crystal by taking Na2O-Cs2O-B2O3 or Na2O-Cs2O-B2O3-MF (M=Na or Cs) as a fluxing agent. The frequency-doubled effect of the Na2CsBe6B5O15 is 0.55 time of that of LiB3O5 (LBO), the ultraviolet absorption edge of the Na2CsBe6B5O15 is shorter than 190nm, and the Na2CsBe6B5O15 can not dissolve in dilute acid, has good chemical stability, can be widely applied to various nonlinear optical fields and develops the nonlinear optical application of deep ultraviolet bands.

Description

technical field [0001] The present invention relates to a novel optoelectronic functional material and its growth method and use, in particular to a nonlinear optical crystal material and its preparation method and use, i.e. sodium beryllium cesium borate, whose chemical formula is Na 2 CaB 6 B 5 o 15 , NCBB for short. Background technique [0002] The nonlinear optical effect of crystal refers to such an effect: when a laser beam with a certain polarization direction passes through a nonlinear optical crystal (such as NCBB) in a certain incident direction, the frequency of the beam will change. [0003] Crystals with nonlinear optical effects are called nonlinear optical crystals. The use of nonlinear optical crystals for laser frequency conversion broadens the range of laser wavelengths and makes the application of lasers more extensive. Especially borate nonlinear optical crystals such as BaB 2 o 4 (BBO), LiB 3 o 5 (LBO), KBe 2 BO 3 f 2 (KBBF), Sr 2 be 2 B ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B9/12G02F1/355G02F1/37G02F1/39
Inventor 叶宁王时超
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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