Method for preparing red nano fluoresent powder of rare earth

A nano-fluorescent powder and red technology, which is applied in the field of preparation of rare earth nano-phosphor powder, can solve the problems of high industrial production cost, easily destroyed crystal lattice, low purity of phosphor powder, etc., achieve shortened reaction time, low industrial production cost, The effect of high purity

Inactive Publication Date: 2006-07-19
HARBIN INST OF TECH
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Problems solved by technology

[0003] The present invention aims to solve the problem that the crystal lattice is easily destroyed, impurities may be introduced, the process is complicated, the process is time-consuming, the purity of the generated phosphor is low, the particle size is large, the uniformity is poor, and the industrial production cost is high in the existing preparation method of rare earth red nano phosphor powder. problem, and provide a kind of preparation method of rare earth red nano phosphor powder

Method used

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  • Method for preparing red nano fluoresent powder of rare earth
  • Method for preparing red nano fluoresent powder of rare earth
  • Method for preparing red nano fluoresent powder of rare earth

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specific Embodiment approach 1

[0006] Specific embodiment one: present embodiment carries out the preparation of rare earth red nano-fluorescent powder according to the following steps: (one) Eu 2 o 3 and Ln 2 o 3 Add the sucrose solution prepared by deionized water after being dissolved in concentrated nitric acid, so that the molar ratio of metal ions and sucrose in the solution is 1:1-30, and then adjust the pH value of the solution to 1-3 to obtain a transparent solution; (2) transparent solution Water bath under the condition of 50-90 ℃ and continuously stirred for 1-5 hours, so that the transparent solution loses water to form an opaque viscous colloid; (3) The opaque viscous colloid is evaporated by microwave heating until a fluffy brown-black xerogel is obtained (4) Calcining the xerogel at 600-1000° C. for 0.5-5 hours to obtain rare earth red nano-fluorescent powder.

specific Embodiment approach 2

[0007] Specific embodiment two: the difference between this embodiment and specific embodiment one is: step (1) will Eu 2 o 3 and Ln 2 o 3 Soluble in concentrated nitric acid, the molar ratio of Eu and Ln in the solution is 1-30:100. Other steps are the same as those in Embodiment 1.

specific Embodiment approach 3

[0008] Specific embodiment three: the difference between this embodiment and specific embodiment one is: step (1) will Eu 2 o 3 and Ln 2 o 3 Soluble in concentrated nitric acid, the molar ratio of Eu and Ln in the solution is 5-25:100. Other steps are the same as those in Embodiment 1.

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Abstract

The preparation method for red nano rare-earth fluorescent powder with 10-30nm grain size overcomes the problems of complex process, low product purity and high cost in prior art, and comprises: (1) dissolving the Eu2O3 and Ln2O3 into strong HNO3 solution, adjusting pH value; (2) water bathing and continual stirring; (3) heating with microwave; (4) calcining the dried gel. This invention brings no impurity, reduces about 30% energy, and convenient to be controlled.

Description

technical field [0001] The invention relates to a preparation method of rare earth nano phosphor powder. Background technique [0002] Rare-earth red fluorescent materials are widely used in high-tech fields such as trichromatic fluorescent lamps, color TV picture tubes, and plasma flat-panel displays. ) of red powder, its chemical formula is (Y 1-a-b Gd a Eu b ) 2 o 3 , 0 ≤ a ≤ 0.9, 0.01 ≤ b ≤ 0.2, because the product particles generated by the solid-phase method are in the micron level, so long-time ball milling is required before coating the screen (tube); and ball milling will destroy the crystal where the nano-phosphor activator is located. grid, may also introduce impurities, resulting in a reduction in luminous efficiency. Chinese patent CN1637115 utilizes the method for co-precipitation of oxalate to combine Eu 2 o 3 , Y 2 o 3 , MgO, Al(NO 3 ) 3 or Sb 2 o 3 The mixture of red fluorescent powder is made; but the preparation process is complicated, the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 徐玲玲张治国魏波吕喆于英宁张云刚
Owner HARBIN INST OF TECH
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