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Melt growth process of sodium borophosphate crystal

A technology of melt growth and sodium borophosphate, applied in the directions of crystal growth, single crystal growth, single crystal growth, etc., can solve the problem that the melt growth of single crystal has not yet been reported, and achieves easy processing and storage, low viscosity , the effect of facilitating ion transport

Inactive Publication Date: 2003-06-04
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, Na 5 [B 2 P 3 o 13 ] The melt method growth of single crystal has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of powdered Na 5 [B 2 P 3 o 13 ] compound:

[0026] 132.5 g Na 2 CO 3 and 172.95 g NH 4 h 2 PO 4 and 61.83 g H 3 BO 3 After mixing evenly (the molar ratio of Na, B and P contained in the mixture is 5:2:3), place it in an open platinum crucible of Φ80×60mm, put the crucible in a muffle furnace (heating electric furnace), After slowly raising the temperature to 450°C, grind it; put it into a furnace and raise the temperature to 700°C, keep the temperature constant for 48 hours to sinter, and grind to obtain powder after cooling, do powder X-ray diffraction on it, and compare with Na in the ICSD database 5 [B2 P 3 o 13 ] powder X-ray diffraction line for comparison, the results show that the obtained powder is Na 5 [B 2 P 3 o 13 ] compound powder.

Embodiment 2

[0028] Preparation of Na by pulling method 5 [B 2 P 3 o 13 ] crystal:

[0029] Na obtained in embodiment 1 5 [B 2 P 3 o 13 ]Put the powder in a Φ60×40mm open platinum crucible, put the crucible into a crystal pulling furnace, heat up to 850°C (melting), keep the temperature for 20 hours, cool down to 10°C above the saturation point temperature, and place the seeds in the c direction The crystal is fixed on the lower end of the seed rod with a platinum wire, so that the seed crystal is in contact with the liquid surface of the melt; after 5 minutes, the temperature is lowered to the saturation temperature, the rotation speed of the seed rod is 15rpm, the pulling speed is 1.0mm / h, and the temperature gradient in the growth zone 30°C / cm; increase the pulling speed at the end of the growth, so that the crystal is separated from the melt surface, and anneal at a rate of 50°C / hr to room temperature to obtain the Na 5 [B 2 P 3 o 13 ] crystal. The preparation period of the...

Embodiment 3

[0031] Preparation of Na by pulling method 5 [B 2 P 3 o 13 ] crystal:

[0032] Na obtained in embodiment 1 5 [B 2 P 3 o 13 ]Put the powder in an open platinum crucible of Φ60×40mm, put the crucible into the crystal pulling furnace, heat up to melting, keep the temperature for 20 hours, cool down to 10°C above the saturation point temperature, and wrap the seed crystal in the b direction with a platinum wire Fix the seed crystal at the lower end of the rod, so that the seed crystal is in contact with the liquid surface of the melt; after 10 minutes, cool down to the saturation temperature, the rotation speed of the seed crystal rod is 9rpm, the pulling speed is 0.8mm / h, and the temperature gradient in the growth zone is 20℃ / cm; increase the pulling speed at the end of the growth, so that the crystal is separated from the melt surface, and anneal at a rate of 50°C / hr to room temperature to obtain the Na in this example 5 [B 2 P 3 o 13 ] crystal. The preparation peri...

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Abstract

The present invention relates to the melt growth process of sodium borophosphate crystal. Synthetic compound Na5[B2P3O13] is set inside crucible and sodium borophosphate crystal is then produced through pulling growth process, melt in fusion growth process or crucible descending growth process. The said process is simple in operation and can grow transparent Na5[B2P3O13] of 22x24x20 mm size and with wide light penetrating waveband, excellent mechanical performance, no deliquescence and other advantages.

Description

field of invention [0001] The invention relates to a melt growth method of sodium borophosphate crystal. Background technique [0002] Nonlinear optical crystals can realize laser frequency conversion and broaden the range of laser wavelengths, so that the application of lasers is more extensive. Especially phosphate and borate NLO crystals such as KDP, BBO, LBO, etc. have attracted much attention due to their excellent nonlinear optical properties. The phosphooxy group and boronoxy group in the material play an important role in the properties of the crystal. If the phosphooxy group and the boronoxy group are in the same compound, it is possible to produce new properties, and the related Functional materials of such compounds are rarely reported. [0003] Compound Na 5 [B 2 P 3 o 13 ] was synthesized by C.Hauf et al in 1995 <chemistry num="001"> <chem file="01139848_cml001.xml" / > < / chemistry> ) and determine its crystal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B15/00C30B29/22
Inventor 吴以成李志华傅佩珍陈创天
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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