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Preparation and application of K3Al2(PO4)3 non-linear optical crystal

A technology of nonlinear optics, K2O-P2O5, applied in the field of preparation of nonlinear optical crystals

Inactive Publication Date: 2012-05-30
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, there is no information on the preparation of K with sufficient size for physical property testing 3 Al 2 (PO 4 ) 3 crystals, and there is no report on K 3 Al 2 (PO 4 ) 3 Crystal nonlinear optical properties or K 3 Al 2 (PO 4 ) 3 A report on the use of crystals in the fabrication of nonlinear optical devices

Method used

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  • Preparation and application of K3Al2(PO4)3 non-linear optical crystal
  • Preparation and application of K3Al2(PO4)3 non-linear optical crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1. high temperature solid state reaction method prepares powdery K 3 Al 2 (PO 4 ) 3 Polycrystalline powder

[0036] According to the reaction formula (2): 3K 2 O+2Al 2 o 3 +6NH 4 h 2 PO 4 = 2K 3 Al 2 (PO 4 ) 3 +9H 2 O↑+6NH 3 ↑

[0037] Weigh 12.42gK 2 O, 6.12gAl 2 o 3 and 20.70gNH 4 h 2 PO 4 (K 2 O:Al 2 o 3 : NH 4 h 2 PO 4 = 0.09mol: 0.06mol: 0.18mol), put the weighed raw materials into a mortar, mix and carefully grind them, then put them into a Φ60mm×60mm open platinum crucible, compact them, and put them into a muffle furnace , heat up to 200°C at 30°C / hour, keep the temperature for 10 hours, take it out after cooling, and the sample is loose at this time; take out the sample and grind it again, then put it in a crucible for compaction, in the muffle furnace, at 50°C Heat up to 500°C per hour and sinter for 24 hours. At this time, the sample shrinks into a block; take out the sample and re-grind and mix it, then put it in a cruc...

Embodiment 2

[0038] Embodiment 2: Flux method prepares K 3 Al 2 (PO 4 ) 3 Nonlinear Optical Crystals.

[0039] Weigh 55.2 g of K 2 CO 3 , 20.2 g Al 2 o 3 and 92.0 g NH 4 h 2 PO 4 [K 3 Al 2 (PO 4 )3 : K 2 O:P 2 o 5 =1mol:0.5mol:0.5mol] After the raw materials are uniformly mixed, put them into an open platinum crucible of Φ80mm×60mm, place them in a muffle furnace, raise the temperature to 700°C at 30°C / hour, keep the temperature constant for 24 hours, and take it out after cooling , put it into a mortar and crush it, and melt it in batches in a Φ60mm×60mm open platinum crucible in a muffle furnace at 1050°C; after cooling, put the crucible into a vertical single crystal growth furnace, and put the Seal the opening on the top of the vertical single crystal growth furnace, leave a small hole at the position corresponding to the top of the vertical single crystal growth furnace and the center of the crucible for the seed rod to enter and exit, and heat up to 1050°C at 50°C / hou...

Embodiment 3

[0040] Embodiment 3: flux method prepares K 3 Al 2 (PO 4 ) 3 nonlinear optical crystal

[0041] with synthetic K 3 Al 2 (PO 4 ) 3 Polycrystalline powder (the product obtained in Example 1) is raw material, analytically pure K 2 CO 3 and NH 4 h 2 PO 4 As a flux, weigh 47.6 grams of K 3 Al 2 (PO 4 ) 3 Powder, 6.9 g K 2 CO 3 , 34.5 g NH 4 h 2 PO 4 [equivalent to K 3 Al 2 (PO 4 ) 3 : K 2 O:P 2 o 5 =1mol: 0.5mol: 1.5mol], evenly mixed, melted in batches at 1030°C in a muffle furnace in an open platinum crucible of Φ60mm×60mm; after cooling, put the crucible into a vertical single crystal growth furnace, Seal the opening at the top of the furnace with insulating material, leave a small hole at the corresponding position between the top of the furnace and the center of the crucible for the entry and exit of the seed rod, raise the temperature to 1030°C at 80°C / hour, keep the temperature for 24 hours, then set the temperature at 20°C °C / hour to cool down to...

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Abstract

The invention relates to a K3Al2(PO4)3 non-linear optical crystal as well as a preparation method and application thereof. The crystal belongs to a rhombic system and has a space group of Pna21, and the cell parameters of the crystal are described in specifications of the invention. The preparation method of the crystal adopts a flux growth method to grow the crystal and mainly comprises the steps of: preparing materials of K3Al2(PO4)3:K2O:P2O5 by the molar ratio being 1: (0.5-1.5): (0.5-1.5); putting in a muffle furnace for heating and melting; and then putting in a single crystal growth furnace for growing the crystal by using a seed crystal method. The K3Al2(PO4)3 crystal has the advantages of large non-linear optical effect, wide light transmission range of 180-2500nm, good mechanicalproperty, no deliquescence and easy processing and preservation and the like, can be used for preparing non-linear optical devices and meet the demands of frequency conversion of laser in a blue-green light band and an ultraviolet light band.

Description

technical field [0001] The invention belongs to the field of preparation of nonlinear optical crystals, in particular to chemical formula K 3 Al 2 (PO 4 ) 3 The preparation and application of nonlinear optical crystals. technical background [0002] Crystals with nonlinear optical effects are called nonlinear optical crystals. Here nonlinear optical effects refer to effects such as frequency doubling, sum frequency, difference frequency, and parametric amplification. Nonlinear optical effects are only possible in crystals that do not have a center of symmetry. Using the nonlinear optical effect of crystals, nonlinear optical devices such as second harmonic generators, up and down frequency converters, and optical parametric oscillators can be made. The laser generated by the laser can be frequency converted by nonlinear optical devices, so as to obtain more useful wavelengths of laser light, so that the laser can be used more widely. The all-solid-state blue-green las...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/14C30B9/06C30B9/12
Inventor 张国春刘作亮傅佩珍吴以成
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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