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Preparation method of self-activation laser crystal phosphoric acid trisneodymium

A technology of laser crystal and tri-neodymium phosphate, which is applied in crystal growth, chemical instruments and methods, and self-melting solvent melt, etc., to achieve the effect of high conversion efficiency and high concentration of activated ions

Inactive Publication Date: 2015-06-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Neodymium Phosphate (Nd 3 PO 7 ) crystals currently only exist in nanocrystals, and the solid state reaction is used to obtain the crystalline phase, and its structure is analyzed. There is no report on the preparation of bulk crystals with fluxes.

Method used

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  • Preparation method of self-activation laser crystal phosphoric acid trisneodymium
  • Preparation method of self-activation laser crystal phosphoric acid trisneodymium

Examples

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Effect test

Embodiment 1

[0025] figure 1 The method of the present invention is used to grow Nd 3 PO 7 Schematic diagram of the crystal device structure. The device is a vertical resistance wire heating furnace. The seed rod 2 extends into the melt 8 and rotates under the drive of the rotating device 1. The furnace tube 4 is equipped with refractory bricks 3, and the resistance wire 5 is wound around the outer wall of the furnace tube 4 , Its outer layer is insulation material 6. The temperature control equipment is a FP21 programmable automatic temperature controller with a temperature control accuracy of 0.1% in the growth temperature area. The crystal incubator 7 is placed in the alumina crucible 9, which is a platinum crucible of 70×90 mm, which can withstand the working temperature below 1774°C, and the contained melt is not easy to cause corrosion to it. The thermocouple 10 uses PtRh / Pt, which can effectively control the growth temperature.

[0026] Use lithium carbonate-tungsten oxide (Li 2 CO 3...

Embodiment 2

[0031] Choose lithium carbonate-tungsten oxide (Li 2 CO 3 -WO 3 ) Combination flux with a molar ratio of 1:1, raw material is 3N Nd 2 O 3 And 3NNH 4 H 2 PO 4 ,According to ammonium dihydrogen phosphate: neodymium oxide=3:2, mix it evenly and put it in a platinum crucible, control the concentration of the solute (ammonium dihydrogen phosphate + neodymium oxide) to 25wt%, and heat up to 1000℃ to melt the material.

[0032] The temperature is raised to 1030°C and the temperature is kept constant for 30 hours. After the material is fully melted, it is stirred to make the melt fully mixed and uniform. Measure the saturation point temperature of the solution by the seed crystal trial method, choose a better quality seed crystal to grow, introduce the seed crystal into the growth furnace when the temperature is 12 ℃ higher than the solution saturation point temperature, and place the seed crystal in a proper position above the liquid surface before fully preheating it. Then the temperatu...

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Abstract

The invention relates to a preparation method of self-activation laser crystal phosphoric acid trisneodymium. Neodymium oxide and ammonium dihydrogen phosphate serve as raw materials, lithium carbonate-tungsten oxide serves as a fluxing agent, solute concentration is controlled to be 20-50wt%, a fluxing agent growth method is used for preparing, obtained neodymium phosphate crystals are monoclinic systems, and a space group is Cm. Prepared phosphoric acid trisneodymium crystals can serve as a laser operation material and be used for producing 1060nm and 1339nm laser output and be used for fields, such as medical treatment, scientific research and military affairs.

Description

(1) Technical field [0001] The present invention relates to the technical field of optoelectronic materials, in particular to the self-activated laser crystal trineodymium phosphate (Nd 3 PO 7 ) Method of preparation. (2) Background technology [0002] All-solid-state lasers are widely used in industrial production, scientific research, medical treatment, military and other fields, and are the mainstream of laser development and research. The miniaturization of all-solid-state lasers is the current development direction, which intends to use microchip-type solid-state lasers to achieve small-volume, high-density, medium and low-power laser output. The performance of the laser crystal has a decisive influence on the efficiency of the laser. Exploring laser crystals with better performance is one of the key tasks for the development of all-solid-state laser technology. [0003] Self-activated laser crystal is an important material basis of laser technology. The activated ion of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/14C30B9/12C01B25/37
Inventor 李静王继扬
Owner SHANDONG UNIV
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