Unlock instant, AI-driven research and patent intelligence for your innovation.

Non-linear optical crystal potassium sodium alumino borate and its preparation process and application

A technology of nonlinear optics and potassium sodium borate, applied in the field of nonlinear optics crystals, can solve the problems of difficult crystal growth and large size

Inactive Publication Date: 2006-02-08
INST OF PHYSICS - CHINESE ACAD OF SCI
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Crystals with larger size and higher quality have been obtained by the molten salt method, which basically overcomes the problems of SBBO, but there is still the problem of difficult crystal growth.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Non-linear optical crystal potassium sodium alumino borate and its preparation process and application
  • Non-linear optical crystal potassium sodium alumino borate and its preparation process and application
  • Non-linear optical crystal potassium sodium alumino borate and its preparation process and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Compound KNaAl 2 B 2 o 7 (hereinafter referred to as KNAB) is synthesized at high temperature (750°C) by solid phase sintering, and its chemical reaction equation is:

[0035]

[0036] The specific operation steps are to accurately weigh 5.30gNa in the operation box according to the molar ratio of 1:2:2:4. 2 CO 3 , 10.01gKHCO 3 , 20.0gAl 2 o 3 , 24.26gH 3 BO 3 , put them into a mortar and grind them well and mix well, then put the ground material into a Φ70mm×50mm platinum crucible, put it in a muffle furnace and slowly raise the temperature to 750°C and keep the temperature constant for 48 hours, take out the crucible after cooling, The sample was ground again and heated to 750°C for 48 hours to obtain the pure KNAB powder phase.

[0037] The purity and manufacturer of the chemical reagents used are:

[0038] h 3 BO 3 Ar Beijing Chemical Reagent Company

[0039] al 2 o 3 Ar Beijing Chemical Reagent Company

[0040] Na 2 CO 3 ...

Embodiment 2

[0042] Embodiment 2, using the melt pulling method to grow KNaAl 2 B 2 o 7 single crystal

[0043] Growth of KNaAl by Melt Pulling Method 2 B 2 o 7 Single crystal: use resistance heating single crystal furnace, use DWT-702 precision temperature controller and Eurotherm818 temperature program controller as the program control device for heating and cooling and constant temperature during the crystal growth process.

[0044] The specific operation is: first weigh 300g of the KNAB compound prepared in Example 1 and place it in a platinum crucible of Φ40mm×40mm, then put it into a resistance heating single crystal furnace, heat up to 1000°C to melt the raw material, keep the temperature for 5 hours, and then The temperature is lowered to 920°C, grown under the process conditions of cooling rate of 1°C / day and crystal rotation speed of 20 rpm, and a KNAB single crystal 1 of 15mm×10mm×4mm can be obtained.

Embodiment 3

[0045] Embodiment 3, using the melt pulling method to grow KNaAl 2 B 2 o 7 single crystal

[0046] Adopt the method in embodiment 2 to grow KNaAl 2 B 2 o 7 Single crystal: First weigh 300g of the KNAB compound prepared in Example 1 and place it in a platinum crucible of Φ40mm×40mm, then put it into a resistance heating single crystal furnace, raise the temperature to 1040°C to melt the raw material, keep the temperature for 1 hour, and then drop to To 960°C, growing under the process conditions of cooling rate of 2°C / day and crystal rotation speed of 50 rpm, KNAB single crystal 2 of 14mm×11mm×5mm can be obtained.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melting pointaaaaaaaaaa
refractive indexaaaaaaaaaa
Login to View More

Abstract

This invention relates to a non-linear optical crystal aluminum boracic acid potassuim natrium. It's molecular formula is KNaAl2B2O7, isomorphic to the usual non-linear optical crystal K2Al2B2O7, the space group is P321, unit cell parameter a=b=8.430(1)A,c=8.134(1)A,Z=3, the volume of unit cell is V=500.6(3)A3, and K, Na are occupied random. This crystal is first using solid phase reaction to synthesize KNaAl2B2O7 powder, then growing KNaAl2B2O7 crystal by fusant withdrawal method or flux method. For laser beam that wave length lambda=1.04 mum, this crystal can make 2,3,4,5 double frequency harmonic light output, also it can make harmonic light output that its wave length is below 200nm. This crystal can be made into harmonic generator, beche-de-mer without spike and light amplifier and optical waveguides device. This crystal has good non-linear optical r optical performance, suitable degree of birefringence, bigger double frequency coefficient, and the crystal can grow easily. We can get big dimension and high quality crystal.

Description

technical field [0001] The invention relates to a nonlinear optical crystal sodium aluminum borate (molecular formula is KNaAl 2 B 2 o 7 , referred to as KNAB) and its preparation method and use. Background technique [0002] The so-called nonlinear optical effect is such a phenomenon: when a beam of laser light passes through a nonlinear optical crystal according to a certain polarization direction and incident direction, laser outputs of different frequencies can be obtained. figure 1 is a typical schematic diagram of this effect. [0003] At present, the prominent crystals in the field of ultraviolet deep ultraviolet nonlinear optical materials mainly include β-BaB 2 o 4 (referred to as BBO), KBe 2 BO 3 f 2 (referred to as KBBF), Sr 2 be 2 B 2 o 7 (referred to as SBBO) and K 2 al 2 B 2 o 7 (referred to as KABO). [0004] The basic structural unit of BBO crystal is planar (B 3 o 6 ) 3- Group, its outstanding advantages are: large frequency doubling coef...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B1/02H01P5/00H01P7/00G01S3/16
Inventor 陈小龙吴星张淑玉贺蒙
Owner INST OF PHYSICS - CHINESE ACAD OF SCI