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Gallate luminous material and preparation method thereof

A technology of light-emitting material and gallate, applied in the field of light-emitting materials, can solve the problems of limited application in lighting and display fields, low light-emitting efficiency, etc., and achieve the effects of improved light-emitting efficiency, fewer process steps, and good light-emitting performance

Inactive Publication Date: 2013-05-08
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the fluorescent materials used in field emission devices at present, there is a class of oxide series phosphors, in which the gallate luminescent material is doped with rare earth ions to emit light, and has the characteristics of good stability. However, the gallate prepared in the prior art Luminescent materials have low luminous efficiency, which limits their application in lighting and display fields

Method used

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  • Gallate luminous material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 sol-gel method prepares La 0.995 GaO 3 :Tm 0.005 , Ag 0.0001

[0031] Weigh 6.4610g La(NO 3 ) 3 ·6H 2 O and 6.4556g Ga(NO 3 ) 3 ·XH 2 O (Ga content 16.2%) was placed in the container, and then 50 mL of a mixed solution of ethanol and water with a volume ratio of 4:1 was added, and 0.75 mL of Tm with a concentration of 0.1 mol / L was added under the condition of stirring in a water bath at 80 °C. 3+ solution, 0.15 mL of AgNO with a concentration of 0.01 mol / l 3 Solution, 8.6463g citric acid and 2.5g polyethylene glycol were stirred for 2 hours to obtain a uniform and transparent precursor sol.

[0032] Dry the precursor sol at 70°C for 20 hours to evaporate the solvent to obtain a xerogel, then grind the obtained xerogel into powder, put it into a high-temperature box furnace and raise the temperature to 800°C at a rate of 60°C / h, at this temperature Calcined at a constant temperature for 8 hours to obtain the blue-emitting La 0.995 GaO 3 :Tm 0....

Embodiment 2

[0033] Embodiment 2 sol-gel method prepares La 0.99 GaO 3 :Tm 0.01 , Ag 0.0005

[0034] Weigh 0.8064g La 2 o 3 and 0.4686g Ga 2 o 3 , heat and dissolve 1.1mL concentrated nitric acid and 1mL deionized water in the container, add 50mL mixed solution of ethanol and water with a volume ratio of 3:1 after cooling, add 0.5mL concentration of 0.1mol / L's Tm 3+ solution, 2.5 mL of Ag nanomicelle solution with a concentration of 0.001 mol / L, 4.8035 g of citric acid and 5 g of polyethylene glycol, and stirred for 4 hours to obtain a uniform and transparent precursor sol.

[0035] Dry the precursor sol at 150°C for 6 hours to evaporate the solvent to obtain a xerogel, then grind the obtained xerogel into powder, put it into a high-temperature box furnace and raise the temperature to 1100°C at a rate of 500°C / h, at this temperature Calcined at constant temperature for 4h to obtain blue-emitting La 0.99 GaO 3 :Tm 0.01 , Ag 0.0005 Gallate luminescent material.

[0036] figur...

Embodiment 3

[0037] Embodiment 3 sol-gel method prepares La 0.995 GaO 3 :Tb 0.005 , Ag 0.00005

[0038] Weigh 2.1537g La(NO 3 ) 3 ·6H 2 O and 2.1519g Ga(NO 3 ) 3 ·XH 2 O (Ga content 16.2%) was placed in the container, and then 50 mL of a mixed solution of ethanol and water with a volume ratio of 8:1 was added, and 0.25 mL of Tb with a concentration of 0.1 mol / L was added under the condition of stirring in a water bath at 70 ° C. 3+ solution, 0.25mL of Ag nanomicelle solution with a concentration of 0.001mol / L, 9.605g of citric acid and 5g of polyethylene glycol, and stirred for 4 hours to obtain a uniform and transparent precursor sol.

[0039] Dry the precursor sol at 120°C for 8 hours to evaporate the solvent to obtain a xerogel, then grind the obtained xerogel into powder, put it into a high-temperature box furnace and raise the temperature to 1350°C at a rate of 300°C / h, at this temperature Calcined at a constant temperature for 2 hours to obtain La which emits blue-white lig...

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Abstract

The invention discloses a gallate luminous material and a prepration method thereof, the chemical formula of the gallate luminous material is La1-xGaO3: Lnx, My, wherein Ln is one or two of Tm 3+, Tb 3+, Eu 3+ and Sm 3+, M is one of Ag, Au, Pt and Pd, y is the molar ratio of La1-xGaO3: Lnx, the value range of x is 0.001-0.1, and the value range of y is 0.00002-0.01. The sol-gel method is adopted for preparing the gallate luminous material, the process is simple, the process conditions are easy to achieve, the quality of a prepared product is high, and the obtained gallate luminous material can greatly improve the luminous efficiency and have excellent luminous performance.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a gallate luminescent material and a preparation method thereof. Background technique [0002] In recent years, field emission devices have attracted much attention because of their advantages such as low operating voltage, low power consumption, no need for deflection yokes, no X-ray radiation, and resistance to radiation and magnetic field interference. The field emission cathode and luminescent material can be combined to obtain a field emission light source with high brightness and high color rendering, which can be applied to the fields of display, various indications and general lighting. [0003] One of the key factors to prepare field emission devices with excellent performance is to prepare high-performance phosphors. Among the fluorescent materials used in field emission devices at present, there is a class of oxide series phosphors, in which the gallate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/87C09K11/80
Inventor 周明杰马文波时朝璞吕婷
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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