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Rapid preparation method of Ho:Sc2O3 nano-crystal powder

A nanocrystal and sc2o3 technology, applied in the direction of nanotechnology, chemical instruments and methods, rare earth metal compounds, etc., can solve the problems of product quality decline, low synthesis efficiency, etc., and achieve the effect of ensuring quality, improving efficiency, and increasing reaction titration rate

Active Publication Date: 2018-05-25
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
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Problems solved by technology

[0006] The traditional chemical co-precipitation method for synthesizing scandium oxide nanopowder adopts the common titration method. The biggest shortcoming is the low synthesis efficiency.
Simply improving the synthesis reaction efficiency of co-precipitation can only reduce the quality of the product, and the gain outweighs the gain

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preparation example Construction

[0039] The embodiment of the invention discloses a Ho:Sc 2 o 3 The rapid preparation method of nanocrystalline powder comprises the following steps:

[0040] Step 1, preparation of cationic salt solution

[0041] Using micron-sized scandium oxide and micron-sized holmium oxide powder as raw materials, add dilute nitric acid to scandium oxide and holmium oxide raw materials respectively until the excess is reached, heat and stir until the raw material powder is completely dissolved, continue heating to make the excess nitric acid volatilize completely, and then add Dilute with deionized water to obtain scandium nitrate solution and holmium nitrate solution, and calibrate Sc in scandium nitrate solution 3+ Concentration and Ho in holmium nitrate solution 3+ Concentration, take scandium nitrate solution and holmium nitrate solution according to the required doping concentration, mix evenly to obtain cation salt solution, dilute the cation salt solution, and keep the total conc...

Embodiment 1

[0061] According to the method of the above-mentioned invention embodiment, the cation concentration of the salt solution is controlled to 0.4mol / liter, and the spray speed is 80ml / min. After the obtained precursor is calcined at 1200°C for two hours, the morphology characteristics of the electron microscope are as shown in the attached figure 2 shown. It can be seen from the SEM morphology that the prepared powder has a large amount of abnormal rod-shaped powder and serious agglomeration.

Embodiment 2

[0063] According to the method of the above-mentioned invention embodiment, the cation concentration of the salt solution is controlled to 0.4 mol / liter, and the spray speed is 20ml / min. After the obtained precursor is calcined at 1200° C. for two hours, the morphology characteristics of the electron microscope are as follows: image 3 As shown, from the SEM morphology characteristics, the obtained nano-powder grains are evenly distributed and well dispersed.

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Abstract

The invention discloses a rapid preparation method of a Ho:Sc2O3 nano-crystal powder. The rapid preparation method of the Ho:Sc2O3 nano-crystal powder comprises the steps of, firstly, preparing cationsalt solution, specifically, dissolving scandium oxide and holmium oxide into nitric acid to obtain scandium oxide solution and holmium oxide solution, uniformly mixing the scandium oxide solution and the holmium oxide solution to obtain the cation salt solution; secondly, preparing precipitant solution, specifically, preparing ammonium bicarbonate solution and at the meantime, adding in ammoniumhydroxide, then adding in ammonium sulfate dispersant to obtain the precipitant solution; thirdly, performing atomizing and precipitation processes, specifically, through a peristaltic pump, sprayingthe precipitant solution into the cation salt solution inside an ultrasonic device via a pneumatic atomizing nozzle to obtain a Ho:Sc2O3 precipitation precursor; fourthly, performing precipitation, filtering and washing processes; fifthly, calcinating the precipitation precursor to obtain the Ho:Sc2O3 nano-crystal powder. The prepared Ho:Sc2O3 nano-crystal powder is high in purity and dispersionand narrow in size distribution and reaches an average grain size of around 100 nm.

Description

technical field [0001] The invention relates to a preparation method of powder, in particular to a Ho:Sc 2 o 3 The invention relates to a rapid preparation method of nano crystal powder, which belongs to the technical field of chemical material preparation. Background technique [0002] Scandium oxide (Sc 2 o 3 ) belongs to the cubic crystal system, and has high transmittance in the visible to mid-infrared bands. At the same time, its corresponding band gap is 5.7eV, which can be well matched with doped rare earth ions to obtain wavelengths from visible to infrared fluorescence. In addition, due to the mechanical and thermal properties of scandium oxide matrix itself such as high thermal conductivity, low phonon energy and wide emission cross-sectional area, scandium oxide becomes one of the most ideal media for high-energy infrared lasers. Doped with holmium ions (Ho 3+ ) scandium oxide can obtain mid-infrared laser output with a wavelength of 2.15 microns or more, an...

Claims

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Application Information

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IPC IPC(8): C01F17/00B82Y40/00
CPCB82Y40/00C01F17/206C01P2002/54C01P2002/72C01P2004/03C01P2004/64C01P2006/80
Inventor 敬畏余盛全胥涛黄辉康彬尹文龙张羽袁泽锐窦云巍陈盈方攀谢婧
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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