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Phosphorus aluminate fluorescent powder and preparation method thereof

An aluminophosphate and phosphor technology, applied in the field of phosphors, can solve the problems of less aluminophosphate phosphors, low luminous efficiency, and fewer types, and achieve excellent fluorescence performance, huge application prospects, high thermal stability and high thermal stability. The effect of chemical stability

Active Publication Date: 2016-02-17
KUNMING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still relatively few studies on aluminophosphate phosphors compounded with aluminate and phosphate.
[0004] Generally speaking, the research on aluminophosphate phosphors is still in its infancy, with few types and low luminous efficiency, and there are still many contents to be studied

Method used

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  • Phosphorus aluminate fluorescent powder and preparation method thereof
  • Phosphorus aluminate fluorescent powder and preparation method thereof
  • Phosphorus aluminate fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Ba 2.90 AlPO 7 :0.10Eu 3+ Synthesis of phosphors.

[0031] Weigh 5.72 grams of barium carbonate, 0.51 grams of aluminum sesquioxide, 1.15 grams of diammonium hydrogen phosphate and 0.175 grams of europium trioxide according to the stoichiometric ratio, put the weighed raw materials in an agate jar, and grind the powder finely by grinding and mix well.

[0032] Then put the mixed raw materials in the corundum boat, in the high-temperature resistance furnace, under the air atmosphere, in the high-temperature tube furnace, heat to 1200°C at a heating rate of 100°C / hour, and keep at this temperature for 2 hours , followed by slow cooling to room temperature.

[0033] The powder obtained by sintering was ground into powder, washed three times with deionized water and ethanol to remove residual impurities, and dried at 200°C for 2 hours to obtain a luminescent powder with uniform particle size.

[0034] For prepared Ba 2.90 AlPO 7 :0.10Eu 3+ Phosphor powder, the inven...

Embodiment 2

[0036] CaSr 1.98 AlPO 7 :0.02Tb 3+ Phosphor Synthesis

[0037] Weigh 1.00 grams of calcium carbonate, 2.92 grams of strontium carbonate, 0.51 grams of aluminum oxide, 1.15 grams of diammonium hydrogen phosphate and 0.036 grams of terbium trioxide according to the stoichiometric ratio, put the weighed raw materials in an agate jar, and grind them Grind the powder finely and mix well.

[0038] Then put the mixed raw materials in the corundum boat, in the high-temperature resistance furnace, under the air atmosphere, in the high-temperature tube furnace, heat up to 1350°C at a heating rate of 300°C / hour, and keep at this temperature for 4 hours , followed by slow cooling to room temperature.

[0039]The powder obtained by sintering was ground into powder, washed three times with deionized water and ethanol to remove residual impurities, and dried at 150° C. for 2 hours to obtain a luminescent powder with uniform particle size.

Embodiment 3

[0041] Sr 2.98 AlPO 7 :0.02Dy 3+ Synthesis of phosphors.

[0042] Weigh 4.40 g of strontium carbonate, 0.51 g of aluminum oxide, 1.15 g of diammonium hydrogen phosphate, and 0.037 g of dysprosium trioxide according to the stoichiometric ratio, put the raw materials in an agate jar, and mix the powder evenly by grinding.

[0043] Then put the mixed raw materials in the corundum boat, in the high-temperature resistance furnace, under the air atmosphere, in the high-temperature tube furnace, heat up to 1400°C at a heating rate of 600°C / hour, and keep at this temperature for 6 hours , followed by slow cooling to room temperature.

[0044] The powder obtained by sintering was ground into powder, washed three times with deionized water and ethanol to remove residual impurities, and dried at 60°C for 20 hours to obtain a luminescent powder with uniform particle size.

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Abstract

The invention relates to phosphorus aluminate fluorescent powder and a preparation method thereof. The fluorescent powder is prepared from M3-aAlP7O6:aR, M represents one of or a composition of more of Mg, Ca, Sr and Ba ions, R represents one of or a composition of more of Ce, Tb, Eu and Dy icons, and 0<a<=0.2. The phosphorus aluminate fluorescent powder has good fluorescence performance within the visible light wave band range, can be stimulated by ultraviolet light or blue light, achieves high light output in the visible light area and can be used for a light-emitting layer of a power type semiconductor illuminating device.

Description

technical field [0001] The invention relates to fluorescent powder, in particular to an aluminophosphate fluorescent powder and a preparation method thereof. Background technique [0002] In order to solve the world energy crisis caused by the shortage of oil, coal and other resources, countries have incorporated power-saving industries, especially white LED industries, into their national development strategies. White LED is a solid light source that converts electrical energy into white light. It has the advantages of power saving, shock resistance, long life, fast response, recyclability, and no pollution. It has broad application prospects in lighting, display and other fields. At present, white light LEDs are mainly realized by coating phosphor powder on purple or blue LED chips, and 60-100% of the emitted white light comes from phosphor powder. one ring. [0003] The phosphors developed in recent years are mainly rare earth-doped sulfide, aluminate, silicate, phospha...

Claims

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Application Information

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IPC IPC(8): C09K11/71
Inventor 鞠海东邓秀君王宝玲王海李盛锋邹涛隅马银海
Owner KUNMING UNIV
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