A kind of er3+/pr3+ co-doped yttrium lithium fluoride single crystal and its preparation method

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 of rare rare earth active ion sensitization and other problems, and achieves low phonon energy and enhanced fluorescence Low emission efficiency, thermal lensing effect

Inactive Publication Date: 2015-09-30
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far no Pr 3+ The sensitization effect of rare earth active ions realizes 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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  • A kind of er3+/pr3+ co-doped yttrium lithium fluoride single crystal and its preparation method
  • A kind of er3+/pr3+ co-doped yttrium lithium fluoride single crystal and its preparation method
  • A kind of er3+/pr3+ co-doped yttrium lithium fluoride single crystal and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022]The single crystal materials of Examples A1~A4 and Comparative Example A0 were respectively prepared by the same preparation method, that is, the proportioning and weighing were carried out according to the molar percentage concentration of the components in Table 1, and the purity of the raw materials used were all greater than 99.99%. After mixing, put it in a mill, grind and mix for 5 hours to obtain a uniform powder; put the above powder loosely in a boat-shaped platinum crucible, and then install the boat-shaped platinum crucible in the platinum pipeline of the tubular resistance furnace; Then use high-purity N 2 Gas removes the air in the platinum pipeline, and conducts leak detection on the platinum pipeline; then gradually raises the temperature of the furnace body of the tubular resistance furnace to 800°C, passes HF gas, and reacts for 2 hours to remove possible H 2 O and oxyfluoride, absorb the HF gas in the tail gas with NaOH solution during the reaction proc...

Embodiment C1

[0033] Embodiment C1, C2, C3, C4 and comparative example C0:

[0034] The single crystal materials of Examples C1~C4 and Comparative Example C0 were respectively prepared by the same preparation method, that is, the proportioning and weighing were carried out according to the composition of the molar percentage concentration in Table 3, and the purity of the raw materials used were all greater than 99.99%. After mixing, put it in a mill, grind and mix for 5 hours to obtain a uniform powder; put the above powder loosely in a boat-shaped platinum crucible, and then install the boat-shaped platinum crucible in the platinum pipeline of the tubular resistance furnace; Then use high-purity N 2 Gas removes the air in the platinum pipe, and conducts leak detection on the platinum pipe; then gradually raises the temperature of the furnace body of the tube resistance furnace to 800°C, passes HF gas, and reacts for 4 hours to remove possible H 2 O and oxyfluoride, during the reaction pr...

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

[0040] The single crystal materials of Examples D1-D4 and Comparative Example D0 were respectively prepared by the same preparation method, that is, the proportioning and weighing were carried out according to the molar percentage concentration of the components in Table 3, and the purity of the raw materials used were all greater than 99.99%. After mixing, put it in a mill, grind and mix for 5 hours to obtain a uniform powder; put the above powder loosely in a boat-shaped platinum crucible, and then install the boat-shaped platinum crucible in the platinum pipeline of the tubular resistance furnace; Then use high-purity N 2 Gas removes the air in the platinum pipeline, and conducts leak detection on the platinum pipeline; then gradually raises the furnace body temperature of the tubular resistance furnace to 800°C, passes HF gas, and reacts for 2.5 hours to remove possible H 2 O and oxyfluoride, during the reaction process, use NaOH solution to absorb HF gas in the tail gas. ...

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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 invention relates to yttrium lithium fluoride crystals, in particular to an Er crystal with enhanced emission characteristics in the 2.7 μm mid-infrared band 3+ / Pr 3+ Co-doped yttrium lithium fluoride single crystal and its preparation method. Background technique [0002] In recent years, due to its important applications in laser medical surgery, remote sensing, lidar, chemical sensing and military, solid-state lasers in the mid-infrared 2.7μm central band have been highly valued by research institutions at home and abroad. [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 abundant energy level structures. Among them 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 materials with luminescent centers have been studied to som...

Claims

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Application Information

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Patent Type & Authority Patents(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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