Method for growing large-size vanadium sodium iodate crystal by using hydrothermal method

A sodium vanadium iodate, crystal growth technology, applied in the direction of single crystal growth, crystal growth, single crystal growth, etc.

Active Publication Date: 2012-04-04
徐翔
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the large-scale single crystal of this compound and its growth.

Method used

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  • Method for growing large-size vanadium sodium iodate crystal by using hydrothermal method
  • Method for growing large-size vanadium sodium iodate crystal by using hydrothermal method
  • Method for growing large-size vanadium sodium iodate crystal by using hydrothermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh NaOH (96 mg), V 2 o 5 (109 mg), I 2 o 5 (1402 mg) was put into a hydrothermal tank with a volume of 30 mL, 4 mL of water was added, sealed, and placed in a heating furnace. The heating furnace was heated up to 160 °C, kept at a constant temperature for 6 hours, and then the temperature was lowered slowly, the crystals nucleated and grew spontaneously, and the cooling rate was 2.5 °C / day. Lower the temperature to 60°C, stop the growth, and open the kettle. Get dimensions 13 x 5 x 2 mm 3 yellow transparent crystals, such as figure 1 .

Embodiment 2

[0020] Weigh NaOH (36 mg), NaVO 3 2H 2 O (142 mg), I 2 o 5 (701 mg) was put into a hydrothermal tank with a volume of 30 mL, 4 mL of water was added, sealed, and put into a heating furnace. The heating furnace was heated up to 160 °C, kept at a constant temperature for 6 hours, and then the temperature was lowered slowly, the crystals nucleated and grew spontaneously, and the cooling rate was 2.5 °C / day. Lower the temperature to 60°C, stop the growth, and open the kettle. Yellow transparent crystals up to 8 mm in size were obtained.

Embodiment 3

[0022] Weigh NaOH (80 mg), NaVO 2 (IO 3 ) 2 (H 2 O) (284 mg), I 2 o 5 (1268 mg) was put into a hydrothermal tank with a volume of 30 mL, 4 mL of water was added, sealed, and placed in a heating furnace. The heating furnace was heated up to 160 °C, kept at a constant temperature for 6 hours, and then the temperature was lowered slowly, the crystals nucleated and grew spontaneously, and the cooling rate was 2.5 °C / day. Lower the temperature to 60°C, stop the growth, and open the kettle. Yellow transparent crystals up to 5 mm in size are obtained.

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Abstract

The invention relates to a method for growing a large-size vanadium sodium iodate crystal by using a hydrothermal method. A Na-containing compound, a V-containing compound and an I-containing compound are used as raw materials in the method for growing the large-size vanadium sodium iodate crystal by using the hydrothermal method; and the crystal is grown in two manners, namely spontaneous nucleation and adoption of a seed crystal. According to the method, successful raw material proportion and growth processes are provided, growth of the massive crystal with a crystal plane is realized, and the maximum size of the crystal exceeds two centimeters.

Description

[0001] technical field [0002] The invention relates to a method for growing a large-size single crystal, in particular to a hydrothermal growth method for a large-size sodium vanadium iodate crystal. Background technique [0003] With the wide application of laser technology, as the core device of laser frequency conversion, nonlinear optical crystals have also been deeply studied. The application of existing nonlinear optical crystals is becoming more and more mature, such as KDP, BBO, LBO, KBBF, KTP, etc. At the same time, new nonlinear optical crystals with superior performance are also emerging. Sodium vanadium iodate is a new crystal with excellent nonlinear optical properties synthesized by us in 2010. Its molecular formula is NaVO 2 (IO 3 ) 2 (H 2 O), belonging to the monoclinic crystal system, the space group is P 2 1 , the point group is C 2. The crystal structure contains distorted VO 6 Octahedrons and IOs with lone electrons 3 group, and the I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B7/10
Inventor 毛江高徐翔杨冰苹
Owner 徐翔
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