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Er<3+>/Pr<3+> co-doped yttrium lithium fluoride monocrystal and preparation method thereof

A technology of yttrium lithium fluoride and single crystal, which is applied in the field of Er3+/Pr3+ co-doped yttrium lithium fluoride single crystal and its preparation, can solve the problems such as rare earth active ion sensitization, achieve low phonon energy and improve luminescence Efficiency, the effect of enhancing fluorescence emission efficiency

Inactive Publication Date: 2013-03-20
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far no Pr 3+ Sensitization of rare earth active ions to achieve Er 3+ Any reports on the process preparation and luminescence characteristics of ion-enhanced 2.7μm mid-infrared luminescent crystal materials

Method used

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  • Er&lt;3+&gt;/Pr&lt;3+&gt; co-doped yttrium lithium fluoride monocrystal and preparation method thereof
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  • Er&lt;3+&gt;/Pr&lt;3+&gt; co-doped yttrium lithium fluoride monocrystal and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0022] The single crystal materials of Examples A1 to A4 and Comparative Example A0 were prepared by the same preparation method, namely: proportioning and weighing according to the composition of the molar percentage concentration in Table 1, and the purity of the raw materials used was greater than 99.99%, After mixing, place it in a mill, mill and mix for 5 hours to obtain a uniform powder; place the above powder fluffy in a boat-shaped platinum crucible, and then install the boat-shaped platinum crucible in a platinum pipe of a tubular resistance furnace; Then use high purity N 2 Exhaust the air in the platinum pipe, and perform leak detection on the platinum pipe; then the temperature of the furnace body of the tubular resistance furnace is gradually increased to 800°C, HF gas is passed through, and the reaction is carried out for 2 hours to remove the possible H 2 O and oxyfluoride, use NaOH solution to absorb HF gas in the tail gas during the reaction. After the reaction, ...

Embodiment C1

[0033] Examples C1, C2, C3, C4 and Comparative Example C0:

[0034] The single crystal materials of Examples C1 to C4 and Comparative Example C0 were prepared by the same preparation method, namely: proportioning and weighing according to the component composition of the molar percentage concentration in Table 3, the purity of the raw materials used was greater than 99.99%, After mixing, place it in a mill, mill and mix for 5 hours to obtain a uniform powder; place the above powder fluffy in a boat-shaped platinum crucible, and then install the boat-shaped platinum crucible in a platinum pipe of a tubular resistance furnace; Then use high purity N 2 Exhaust the air in the platinum pipe, and perform leak detection on the platinum pipe; then, the temperature of the furnace body of the tubular resistance furnace is gradually increased to 800 ℃, HF gas is passed through, and the reaction is 4 hours to remove the possible H 2 O and oxyfluoride, use NaOH solution to absorb HF gas in the...

Embodiment D1、D2、D3、D4 and comparative example D0

[0040] The single crystal materials of Examples D1 to D4 and Comparative Example D0 were prepared by the same preparation method, namely: proportioning and weighing according to the component composition of the molar percentage concentration in Table 3, and the purity of the raw materials used was greater than 99.99%, After mixing, place it in a mill, mill and mix for 5 hours to obtain a uniform powder; place the above powder fluffy in a boat-shaped platinum crucible, and then install the boat-shaped platinum crucible in a platinum pipe of a tubular resistance furnace; Then use high purity N 2 Exhaust the air in the platinum pipe, and perform leak detection on the platinum pipe; then the temperature of the furnace body of the tubular resistance furnace is gradually increased to 800°C, HF gas is passed through, and the reaction is 2.5 hours to remove the possible H 2 O and oxyfluoride, use NaOH solution to absorb HF gas in the tail gas during the reaction. After the reaction, stop...

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Abstract

The invention discloses an Er<3+> / Pr<3+> co-doped yttrium lithium fluoride monocrystal and a preparation method thereof. The yttrium lithium fluoride monocrystal is a rare earth ion Er<3+> / Pr<3+> co-doped monocrystal; and the molecular formula is LiY(1-x-y)ErxPryF4, wherein x is greater than or equal to 0.010 and less than or equal to 0.085, and y is greater than or equal to 0.0001 and less than or equal to 0.008. The yttrium lithium fluoride monocrystal has the advantages of high emission efficiency of fluorescence of 2.7 microns and high transmittance in intermediate infrared ray, has better thermal, mechanical and chemical stabilities than those of glass state materials and has the characteristics of low phonon energy, high optical transmittance of wavebands with width of 300-5500nm, less color center forming amount, low thermal lens effect and the like, thereby being more easily processed and more suitably used in laser devices. In the preparation method disclosed by the invention, a sealing crucible falling technology is used, so that the operation is simple; the raw material is fluorated at high temperature in a sealed water-free and oxygen-free environment, so that the crystal is isolated from air and water vapor during the growth; and therefore, the high-quality Er<3+> / Pr<3+> co-doped LiYF4 monocrystal containing little OH<-> ion and oxide is obtained.

Description

Technical field [0001] The present invention relates to yttrium lithium fluoride crystals, in particular to an Er with enhanced 2.7μm mid-infrared emission characteristics 3+ / Pr 3+ Co-doped yttrium lithium fluoride single crystal and preparation method thereof. Background technique [0002] In recent years, due to important applications in laser medical surgery, remote sensing, lidar, chemical sensing, and military, solid-state lasers with mid-infrared 2.7μm center band have been highly valued by domestic and foreign research institutions. [0003] Inorganic materials doped with rare earth ions are one of the effective ways to obtain near-infrared and mid-infrared lasers. Most lanthanide rare earth ions have a rich energy level structure. Where Er 3+ Rare earth ion 4 I 11 / 2 → 4 I 13 / 2 The energy level jump can produce 2.7μm fluorescence emission, with Er 3+ The 2.7μm mid-infrared laser material that is the luminescent center has been studied to a certain extent, mainly Er 3+ Sing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12C30B11/00
Inventor 夏海平胡建旭汪沛渊彭江涛张约品
Owner NINGBO UNIV
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