Method for reinforcing upconversion luminous efficiency of rare earth doped nano-crystal powder material

A technology of powder materials and luminous efficiency, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of complicated process and expensive materials, and achieve the effect of enhanced effect, wide applicability, and improved luminous efficiency

Inactive Publication Date: 2014-12-03
三亚哈尔滨工程大学南海创新发展基地
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  • Application Information

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Problems solved by technology

But its process is complex and the material (Au) used is expensive

Method used

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  • Method for reinforcing upconversion luminous efficiency of rare earth doped nano-crystal powder material
  • Method for reinforcing upconversion luminous efficiency of rare earth doped nano-crystal powder material
  • Method for reinforcing upconversion luminous efficiency of rare earth doped nano-crystal powder material

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Embodiment Construction

[0015] The following examples describe the present invention in more detail:

[0016] 1. Use a tablet press to press the prepared rare earth ion-doped nanocrystal powder into a circular sheet with a thickness of about 1 mm.

[0017] 2. Fix the circular sheet on the product shelf, align and excite the surface of the sheet with a low-power laser, collect the upconversion fluorescence of the product, and measure the spectrum with a spectrometer ( figure 2 Curve 1).

[0018] 3. Increase the laser power. Irradiate the surface of the sheet with a high-power laser to melt the irradiated point until microcavities are formed (Figure 1), stop the laser irradiation, and obtain an ablation point with enhanced up-conversion luminescence after cooling. The formation of ablation microvoids is marked by the sharp increase of thermal radiation brightness at the irradiation point on the surface of the slice.

[0019] 4. Verify the enhanced effect. Keep the relative position of the product s...

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Abstract

The invention provides a method for reinforcing the upconversion luminous efficiency of a rare earth doped nano-crystal powder material. The method comprises the following steps of: pressing rare earth ion doped nano-crystal powder into a thin slice by a tablet press; irradiating the surface of the thin slice by high power laser to ensure the position of the irradiated point to be molten until a micro hole is formed; stopping carrying out laser irradiation; and cooling. According to the method provided by the invention, a preparation method, preparation conditions and a doped matrix of the rare earth doped nano-crystal powder material are not changed; other metal ions do not need to be doped; and the obvious reinforcement of the upconversion luminescence can be obtained only by carrying out secondary processing on a formed product.

Description

technical field [0001] The invention relates to an up-conversion luminescence method of a rare-earth-doped solid material, in particular to a method for enhancing the up-conversion luminescence efficiency of a rare-earth-doped nanocrystal powder material. Background technique [0002] Up-conversion luminescence refers to the phenomenon of emitting short-wavelength high-frequency fluorescence under the pumping of long-wavelength low-frequency laser. The upconversion luminescence of rare earth ions has shown or has great application value in many fields such as fiber amplifiers, solar cells, and short-wavelength lasers. In recent years, with the rapid development of nanomaterial technology, rare earth ion-doped up-conversion luminescent materials on the nanometer scale have appeared. The combination of nano-size effect and upconversion luminescence of rare earth ions has given birth to rare earth-doped nanocrystal materials, which have been widely used in bioluminescence labe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/362B23K26/354
Inventor 张振国李立张新陆
Owner 三亚哈尔滨工程大学南海创新发展基地
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