Method for preparing material of frequency up conversion

A technology for converting materials and frequencies, applied in the field of fluorescent materials, can solve the problems of limited application and low up-conversion efficiency, and achieve the effects of regular shape, shortened reaction cycle, and uniform distribution

Inactive Publication Date: 2007-12-26
XIAMEN UNIV
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  • Abstract
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Problems solved by technology

Up-conversion materials have been widely used in various fields such as three-dimensional display, up-conversion lasers, fiber amplifiers and anti-counterfeiting, making them a focus in luminescent optics (J.H.Zeng, J.Su, Z.H.Li, R.X.Yan and Y.D.Li: Adv .Mater.Vol.17(2005), p.2119), but for a long time due to the low conversion efficiency, its application has been limited

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  • Method for preparing material of frequency up conversion
  • Method for preparing material of frequency up conversion

Examples

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Embodiment 1

[0024] (1) Preparation of rare earth nitrate solution

[0025] Accurately weigh Y 2 o 3 14.114g, add 25ml concentrated nitric acid, heat to 70°C in a water bath, fully dissolve it under magnetic stirring, transfer to a 250ml volumetric flask to constant volume, and configure as Y 3+ A solution with a concentration of 0.500mol / l; accurately weigh Yb 2 o 3 9.852g, add 12ml concentrated nitric acid, heat to 80°C in a water bath, fully dissolve it under magnetic stirring, transfer to a 250ml volumetric flask to constant volume, and configure as Y 3+ A solution with a concentration of 0.200mol / l; weigh Er 2 o 3 0.957g, add 0.5ml concentrated nitric acid, heat to 70°C in a water bath, fully dissolve it under magnetic stirring, transfer to a 250ml volumetric flask to constant volume, and configure as Er 3+ A solution with a concentration of 0.020mol / l; weigh the Tm 2 o 3 0.242g, add 0.3ml concentrated nitric acid, heat to 70°C in a water bath, fully dissolve it under magne...

Embodiment 2

[0030] Embodiment 2: In embodiment 1, change preparation step (3) 0.552g ammonium fluoride into 0.663g; Make the molar ratio of oxide compound, sodium fluoride, ammonium fluoride be 1: 2: 12, grind and mix ; Place the mixture in an electric furnace to raise the temperature to 450°C at a rate of 3°C / min and keep it warm for 3h, which is the cost example.

Embodiment 3

[0031] Embodiment 3: similar to embodiment 1, its difference is that the 0.552g ammonium fluoride in embodiment 1 step (3) is changed into 1.104g; Make the mol ratio of oxide compound, sodium fluoride, ammonium fluoride be 1: 2:20, grind and mix; put the mixture in an electric furnace and raise the temperature to 250°C at a rate of 3°C / min and keep it warm for 4h, which is the cost example.

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Abstract

This invention discloses a method for preparing frequency up conversion material. The method comprises: adding concentrated HNO3 into yttrium oxide, ytterbium oxide and erbium oxide (or thulium oxide), heating to dissolution in a water bath to obtain yttrium nitrate solution, ytterbium nitrate solution and erbium nitrate solution (or thulium nitrate solution), mixing to obtain mixed solution A, adding glycine to obtain mixed solution A1, placing mixed solution A1 in a furnace, cooling to obtain white powder A2, adding NaF and NH4F to obtain mixture A3, placing mixture A3 in a furnace, and performing thermal treatment to obtain the target product. Compared with hydrothermal method, the method in this invention has such advantages as low thermal treatment temperature and short reaction period. The synthesized sample has such advantages as small and uniform sizes, no need for grinding, regular morphology and high luminescent efficiency.

Description

technical field [0001] The invention relates to a fluorescent material, in particular to a frequency up-converting material and a preparation method thereof. Background technique [0002] Among photoluminescent materials, up-conversion materials refer to materials that can emit fluorescence shorter than the excitation wavelength when excited by light, that is, absorb low-frequency light and emit high-frequency light, so it is frequency up-conversion. The upconversion phenomenon of this material is the anti-Stockes effect (Xu Xurong, Su Fangzeng. Luminescent Optics and Luminescent Materials. Beijing: Chemical Industry Press, 2004; Zhang Zhongtai, Zhang Junying. Inorganic Photoluminescent Materials and Their Applications. Beijing: Chemistry Industrial Press, 2005), the long-wave radiation is converted into short-wave radiation through the multiphoton mechanism, so that the infrared light invisible to the human eye can be changed into visible light. Up-conversion materials hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/77
Inventor 熊兆贤成昌华
Owner XIAMEN UNIV
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