A ho3+/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 Ho3+/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: 2015-08-05
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 luminescent characteristics of ion-enhanced 2.9μm mid-infrared emitting crystal materials

Method used

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  • A ho3+/pr3+ co-doped yttrium lithium fluoride single crystal and its preparation method
  • A ho3+/pr3+ co-doped yttrium lithium fluoride single crystal and its preparation method
  • A ho3+/pr3+ co-doped yttrium lithium fluoride single crystal and its preparation method

Examples

Experimental program
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Effect test

preparation example Construction

[0021] The single crystal materials of Examples A1-A5 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 2O and oxyfluoride, during the reaction process, use NaOH solution to absorb HF gas in the tail g...

Embodiment C1

[0032] Embodiment C1, C2, C3, C4 and comparative example C0:

[0033] 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

[0039] 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 a Ho<3+> / Pr<3+> codoping lithium yttrium fluoride monocrystal and a preparation method thereof. The lithium yttrium fluoride monocrystal is a rare-earth iron Ho<3+> / Pr<3+> codoping monocrystal; the molecular formula of the lithium yttrium fluoride monocrystal is LiY(1-x-y)HoxPryF4, wherein x is more than and equal to 0.004 or less than and equal to 0.08, and y is more than and equal to 0.0002 or less than and equal to 0.01. The lithium yttrium fluoride monocrystal disclosed by the invention has the characteristics of high efficiency of 2.9 mu m fluorescence emission, high intermediate-infrared transmittance, more excellent thermotic, mechanical and chemical stability compared with those of a glass-state material, low phonon energy, high optical transmissibility at a 300-5500 nanometer broadband, small color center forming amount, low thermal lens effect, and the like, and is easier to process and more suitable for a laser device. The preparation method disclosed by the invention adopts a sealing crucible descent method technology, is easy to operate, carries out high-temperature fluorination treatment on a raw material and obtains the high-quality Ho<3+> / Pr<3+> codoping LiYF4 monocrystal almost without -OH ions or oxides by insulating the monocrystal from air and vapors in the growing process by adopting a water-insulated oxygen-insulated sealing environment.

Description

technical field [0001] The invention relates to yttrium lithium fluoride crystals, in particular to a Ho 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 2.9 μm 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 Ho 3+ rare earth ion 5 I 6 → 5 I 7 Energy level jump can produce 2.9μm fluorescence emission, with Ho 3+ The 2.9μm mid-infrared laser material with the luminescent center has been studied to some extent. Mainly Ho 3+ Ionic single-doped SrMoO 4 , La 3 Ga 5 SiO 14 、NaLa(MoO 4 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/12C30B11/00
Inventor 夏海平彭江涛汪沛渊张约品
Owner NINGBO UNIV
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