Preparation method of self-activation laser crystal phosphoric acid trisneodymium

A technology of trineodymium phosphate and crystal, which is applied in the directions of 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: 2013-02-06
SHANDONG UNIV
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  • 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

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Embodiment 1

[0025] figure 1 Provided adopting the method of the present invention to grow Nd 3 PO 7 Schematic diagram of the device structure of the crystal. 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 on the outer wall of the furnace tube 4. , its outer layer is thermal insulation material 6. The temperature control equipment is FP21 programmable automatic temperature controller, and the temperature control accuracy in the growth temperature area is 0.1%. 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 melt contained therein is not easy to corrode it. The thermocouple 10 adopts PtRh / Pt, which can effectively control the growth temperature.

[0026] Lithium carbonate-...

Embodiment 2

[0031] Lithium carbonate-tungsten oxide (Li 2 CO 3 -WO 3 ) The molar ratio of 1:1 is used as a flux, and the 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 evenly into a platinum crucible, control the concentration of solute (ammonium dihydrogen phosphate + neodymium oxide) to 25wt%, and raise the temperature to 1000 ° C.

[0032] Raise the temperature to 1030°C, keep the temperature constant for 30 hours, stir after the material is fully melted, so that the melt is fully mixed and even. Use the seed crystal test method to measure the temperature of the solution saturation point, select a better quality seed crystal for growth, and when the temperature is 12°C higher than the solution saturation point, introduce the seed crystal into the growth furnace, place it at an appropriate position above the liquid surface and fully preheat it before lowering it into the Solution, then lower the temperature ...

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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 invention relates to the technical field of optoelectronic materials, in particular to a self-activated laser crystal neodymium 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, aiming to use Microchip-type solid state lasers to achieve small-volume, high-density, and low-to-medium power laser output. Laser crystal properties have a decisive influence on the efficacy of lasers. Exploring laser crystals with better performance is one of the key tasks in the development of all-solid-state laser technology. [0003] Self-activated laser crystals are an important material basis for laser technology. The active ion of this type of crystal is not...

Claims

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Application Information

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