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Compound potassium lead borophosphate nonlinear optical crystal as well as preparation method and application thereof

A nonlinear optics, potassium lead phosphate technology, applied in nonlinear optics, chemical instruments and methods, optics, etc., can solve the problems of slow growth, difficult to obtain large-sized crystals, BBO phase transition, etc.

Inactive Publication Date: 2010-11-03
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After decades of hard work by scientists from various countries, many nonlinear optical crystals have been discovered, and some nonlinear optical crystals have been used in practice, such as: KTP, low-temperature phase BBO, LBO, etc., but these materials have shortcomings in crystal growth Advantages: Since KTP and LBO are non-identical molten compounds, they must be grown using a flux method; BBO has a phase change, so the low temperature phase BaB 2 o 4 Flux growth
Because these crystals need to be grown by the flux method, the growth rate is slow, and it is not easy to obtain large-sized crystals.

Method used

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  • Compound potassium lead borophosphate nonlinear optical crystal as well as preparation method and application thereof
  • Compound potassium lead borophosphate nonlinear optical crystal as well as preparation method and application thereof
  • Compound potassium lead borophosphate nonlinear optical crystal as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: (adopting melt method)

[0034] Potassium lead borophosphate (KPbBP) 2 o 8 ) compounds:

[0035] By chemical formula: K 2 CO 3 +2PbO+2H 3 BO 3 +4NH 4 h 2 PO 4 =2KPbBP 2 o 8 +CO 2 ↑+4NH 3 ↑+9H 2 O↑, prepared by solid phase reaction method:

[0036] Will K 2 CO 3 , PbO, H 3 BO 3 , NH 4 h 2 PO 4 Weigh it into a mortar with a molar ratio of 1:1:1:2, mix and grind it carefully, put it into a corundum crucible with an opening of Ф400mm×400mm, press it tightly, put it into a muffle furnace, and slowly raise the temperature to 500 ℃, constant temperature for 24 hours, take out the crucible after cooling, at this time the sample is relatively loose, then take out the sample and grind it evenly, then put it in the crucible, keep the temperature in the muffle furnace at 800℃ for 48 hours, take it out, put it in Pound and grind in a mortar to get KPbBP 2 o 8 compound, the product is subjected to X-ray analysis, and the resulting X-ray spectrum ...

Embodiment 2

[0041] Embodiment 2: (adopting melt method)

[0042] According to reaction formula K 2 O+2PbO+2H 3 BO 3 +4NH 4 h 2 PO 4 =2KPbBP 2 o 8 +4NH 3 ↑+9H 2 O ↑ Synthetic KPbBP 2 o 8 Compound, specific operation steps are carried out according to embodiment 1;

[0043] Preparation of KPbBP by pulling method 2 o 8 the crystal

[0044] Synthetic KPbBP 2 o 8 Put the compound into a Ф90mm×90mm open platinum crucible, put the crucible into a crystal growth furnace, raise the temperature to 980°C, keep the temperature for 10 hours, then cool it down to 867°C, cut the KPbBP along the c-axis 2 o 8 The seed crystal is fixed on the lower end of the seed rod with a platinum wire, and the seed crystal is introduced into the crucible from the small hole on the top of the furnace, so that the seed crystal is in contact with the liquid surface of the melt, and the temperature is lowered to 865°C, the rotation speed of the seed rod is 20rpm, and the pulling speed is 0.1 mm / h, increas...

Embodiment 3

[0046] Embodiment 3: (adopt melt method)

[0047] Reaction K 2 C 2 o 4 .H 2 O+2PbO+2H 3 BO 3 +4NH 4 h 2 PO 4 =2KPbBP 2 o 8 +CO 2 ↑+CO↑+4NH 3 ↑+10H 2 O ↑ Synthetic KPbBP 2 o 8 Compound, specific operation steps are carried out according to embodiment 1;

[0048] Preparation of KPbBP by Kyropoulos method 2 o 8 the crystal

[0049] Synthetic KPbBP 2 o8 Put the compound into an open platinum crucible of Ф80mm×80mm, put the crucible into a crystal growth furnace, raise the temperature to 1100°C, keep the temperature for 4 hours, then cool down to 865°C, cut the KPbBP along the c-axis 2 o 8 The seed crystal is fixed on the lower end of the seed rod with a platinum wire, and the seed crystal is introduced into the crucible from the small hole on the top of the furnace, so that the seed crystal is in contact with the liquid surface of the melt. After the crystal growth is over, the crystal is lifted from the melt surface, cooled to room temperature at a rate of 10...

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Abstract

The invention relates to a compound potassium lead borophosphate nonlinear optical crystal as well as a preparation method and application thereof. The compound has the chemical formula of KPbBP2O8. The preparation method comprises the following steps of: after uniformly mixing a raw material containing K, Pb, B and P by adopting a solid-phase reaction method, heating for carrying out solid-phase reaction to obtain a compound of the potassium lead borophosphate; and growing a crystal on the compound by adopting a melt method to obtain the potassium lead borophosphate nonlinear optical crystal. The compound is the centimeter-grade large size nonlinear optical crystal of a tetragonal crystal system; a space group is I-42d; cell parameters comprise a=7.1764(7), b=7.1764(7), c=13.9483(13), Z=4 and V=718.35; the powder frequency doubling effect of the compound is equivalent to that of KDP (Potassium Dihydrogen Phosphate); the Mohs hardness is 4 to 5; and the potassium lead borophosphate nonlinear optical crystal has the advantages of easy cutting, polishing processing and storage, no deliquescence, high preparation speed, simple operation, low cost, good mechanical performance, difficult cracking, stable physicochemical property, and the like and is suitable for manufacturing an nonlinear optical device.

Description

technical field [0001] The invention relates to a compound potassium lead borophosphate (KPbBP 2 o 8 ) nonlinear optical crystal and its preparation method and application. Background technique [0002] Nonlinear optical crystal material is a new type of material. It uses nonlinear processes such as frequency doubling, frequency mixing, optical parametric oscillation and multiphoton absorption of nonlinear optical crystal material to achieve the purpose of optical frequency conversion. This type of crystal is widely used in laser frequency Transformation, four-wave mixing, beam steering, image amplification, optical information processing, optical storage, optical fiber communication, underwater communication, laser countermeasures and nuclear fusion research and other fields. [0003] After decades of hard work by scientists from various countries, many nonlinear optical crystals have been discovered, and some nonlinear optical crystals have been used in practice, such as...

Claims

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Application Information

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IPC IPC(8): G02F1/355C30B29/22C30B11/00
Inventor 潘世烈赵奕侯雪玲贾殿增
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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