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Rare earth phosphate nano-phosphor and preparation method thereof

A technology of rare earth phosphate and nano-fluorescent powder, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of unfavorable practical application, narrow application range, and high price, and achieve stable and reliable process conditions, low cost, and particle size small effect

Inactive Publication Date: 2012-09-05
JIANGSU FOCUS NEW ENERGY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The thermal injection method is a common method for preparing monodisperse oil-soluble phosphor nanoparticles, but the disadvantage of this method is that the reaction needs to be carried out at a higher temperature, a high-boiling point flux is required, and the reaction precursors used are usually expensive. It is a highly toxic organometallic compound with a narrow scope of application, and its yield is low, which is not conducive to the transformation into practical applications

Method used

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  • Rare earth phosphate nano-phosphor and preparation method thereof
  • Rare earth phosphate nano-phosphor and preparation method thereof
  • Rare earth phosphate nano-phosphor and preparation method thereof

Examples

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Embodiment 1

[0031] (Example 1, Rare Earth Phosphate Nano Phosphor Powder)

[0032]The rare earth phosphate nano-phosphor powder of this embodiment includes a structural formula of Bi (1-y) PO 4 :y Eu 3+ Nano-rare earth phosphate particles and adsorption on Bi (1-y) PO 4 :y Eu 3+ A layer of oleate ions outside the nano-rare earth phosphate particles; the particle size of the nano-rare earth phosphate particles is 40-80nm, 0.05— It is adsorbed on the surface of nano-rare earth phosphate particles, while the organic long chain at the other end of the oleate ion as a lipophilic group is far away from the surface of nano-rare earth phosphate particles; It emits red light visible to the naked eye under ultraviolet light at 254 nm.

Embodiment 2

[0033] (Example 2, Rare Earth Phosphate Nano Phosphor Powder)

[0034] The rare earth phosphate nano-phosphor powder of this embodiment includes a structural formula of Bi (1-y) PO 4 :y Tb 3+ Nano-rare earth phosphate particles and adsorption on Bi (1-y) PO 4 :y Tb 3+ A layer of oleate ions outside the nano-rare earth phosphate particles; the particle size of the nano-rare earth phosphate particles is 40-80nm, 0.05— It is adsorbed on the surface of nano-rare earth phosphate particles, while the organic long chain at the other end of the oleate ion as a lipophilic group is far away from the surface of nano-rare-earth phosphate particles; the phosphor is a white powder with a wavelength of 254 It emits green light visible to the naked eye under ultraviolet light of 1 nm.

Embodiment 3

[0035] (Example 3, Rare Earth Phosphate Nano Phosphor Powder)

[0036] The rare earth phosphate nano-phosphor powder of this embodiment includes a structural formula of Bi (1-y) PO 4 :y Sm 3+ Nano-rare earth phosphate particles and adsorption on Bi (1-y) PO 4 :y Sm 3+ A layer of oleate ions outside the nano-rare earth phosphate particles; the particle size of the nano-rare earth phosphate particles is 40-80nm, 0.05— It is adsorbed on the surface of nano-rare earth phosphate particles, while the organic long chain at the other end of the oleate ion as a lipophilic group is far away from the surface of nano-rare-earth phosphate particles; the phosphor is a white powder with a wavelength of 254 It emits a light red light visible to the naked eye under ultraviolet light of 10 nm.

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Abstract

The invention discloses a rare earth phosphate nano-phosphor and a preparation method thereof. A synthesis method comprises the steps of taking polyphosphoric acid, nitric acid and rare earth nitrate as raw materials, taking sodium oleate as surfactant and performing hydrothermal treatment on precursors at 100 to 180 DEG C to obtain oil-soluble phosphor. According to the difference of rare earth ions contained, the phosphor emits visible red, green or light red light under the irradiation of 254nm-wavelength ultraviolet rays of a low-pressure mercury lamp. The obtained phosphor is white powder with small particle size, uniform size distribution and high luminescent intensity, and as the surfaces of phosphor particles adsorb hydrophilic groups COO- at one end of oleate ions while organic long chains at the other end of the oleate ions are oleophylic groups, the nano-phosphor has good dispersity in organic solvent and can be dispersed in the organic solvent to form transparent sol.

Description

technical field [0001] The invention belongs to the technical field of rare earth luminescent materials, and in particular relates to a rare earth phosphate nano fluorescent powder and a preparation method thereof. Background technique [0002] Since the commercialization of rare earth phosphors for lamps in the 1970s, the research on phosphors has entered a new stage. The preparation of phosphors is the basis of the study of luminescent materials. Rare earth luminescent materials are particularly attractive because of their rich and varied fluorescence characteristics, high color purity of luminescence, high luminescence conversion rate and stable chemical properties. After decades of development, rare earth luminescent materials have become an important class of functional materials, widely used in fluorescent lamps, plasma flat panel displays and X-ray imaging technology and other fields. [0003] The size, uniformity and shape of the phosphor are very important factors ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/74
Inventor 关明云
Owner JIANGSU FOCUS NEW ENERGY TECH
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