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Preparation method of superfine scandium oxide nano powder

A technology of nano-powder and scandium oxide, applied in the field of nano-materials, can solve problems such as difficult large-scale production, difficulty in filtration and washing, precipitation and pollution, and achieve low cost, simple and easy preparation process, and high dispersion.

Inactive Publication Date: 2015-04-29
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Problems solved by technology

This kind of precipitation method, at the moment of mixing, in the place of mixing, there will always be local overconcentration, so the whole solution is not uniform everywhere, which will cause co-precipitation of other substances in the solution, making the precipitate stained, and hindering filtration and filtration. Washing poses difficulties; moreover, the method is difficult to apply to large-scale production

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  • Preparation method of superfine scandium oxide nano powder
  • Preparation method of superfine scandium oxide nano powder
  • Preparation method of superfine scandium oxide nano powder

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[0042] The present invention relates to a kind of Yb 3+ doped Sc 2 o 3 Preparation method of nanopowder. The nanometer powder has small particle size and uniform particle size distribution (25-50nm), less agglomeration and high sintering activity, which is very beneficial to the preparation of highly dense transparent ceramics. Sc prepared from the above powder 2 o 3 The transmittance of base transparent ceramics is close to the theoretical value, and has broad application prospects in ultrafast laser materials, infrared window materials, scintillation materials and other fields. The synthesis method involved in the invention has the characteristics of simplicity, novelty, low cost and high efficiency.

[0043] figure 1 The superfine Yb that is the gained of embodiment 1 3+ Scanning electron microscope (SEM) photographs of doped scandium oxide nanopowders. As can be seen from the photo: the prepared Yb 3+ The particle size of the doped scandium oxide nanopowder is 25-...

Embodiment 1

[0048] With chemical formula (Yb x sc 1-x ) 2 o 3 Weigh high-purity (99.99%) Yb 2 o 3 and Sc 2 o 3 A total of 0.030mol, dissolved in concentrated nitric acid (analytical pure) at 70 ° C, continue heating to evaporate excess nitric acid and water. Add 1600 mL of water, 400 mL of ethanol, and 1 mol of urea (analytical grade), and add 0.5 g of ammonium sulfate (analytical grade) as a dispersant to each 100 mL of the mixed solution, and stir for 2 hours. Placed in an oven at 90°C for 10 h. Finally, centrifuge, pour off the supernatant, add 800mL deionized water and stir for 45min, and then continue to centrifuge. Repeat the above operation 4 times with water, and repeat the operation 2 times with absolute ethanol. The final precursor was dried in an oven at 70 °C for 24 h. Pass through a 200-mesh sieve and calcinate at 1100°C for 4 hours in the air to obtain Yb 3+ :Sc 2 o 3 Nano powder.

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Abstract

The invention relates to a preparation method of superfine scandium oxide nano powder. The preparation method comprises the following steps: a) adding ethanol, urea and ammonium sulfate into an aqueous solution containing Sc<3+>, uniformly mixing to obtain a mixed solution, and performing centrifugal separation after reacting for a specified time at 85-95 DEG C to obtain a sediment; and b) washing and drying the sediment prepared in step a), and calcining at 1,000-1,300 DEG C to obtain the superfine scandium oxide nano powder.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and relates to a novel preparation method of a transparent ceramic raw material powder, in particular to a preparation method of an ultrafine scandium oxide nanopowder. Background technique [0002] Since the birth of high-power InGaAs semiconductor diode lasers (LD) (D.Bour, D.Gilbert, K.Fabian, J.Bednarz, M.Ettenberg, Low degradation rate in strained InGaAs / AlGaAs single quantum welllasers, IEEE.Photonic.Tech. Lett.2 (1990) 173-174.), Yb 3+ Ion-doped laser materials due to their 4f 13 The only absorption band in the configuration coincides with the emission band of the LD, which is very important for the miniaturization and simplicity of the ultrafast laser system. [0003] Yb 3+ As the active ion, because only the interval is about 10000cm -1 Two multiple states of , the ground state 2 f 7 / 2 and excited state 2 f 5 / 2 , which makes some effects that are not conducive to laser oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y30/00
Inventor 刘万鹏潘裕柏寇华敏李江石云
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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