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a ce 3+ , Dy 3+ Doped phosphor with controllable color and preparation method thereof

A phosphor and color technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of short service life, low luminous efficiency, mercury generation, etc., and achieve the effects of low cost, simple preparation process and good filling.

Active Publication Date: 2021-01-08
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, lighting sources represented by fluorescent lamps have many defects, such as low luminous efficiency, high energy consumption, short service life, and the generation of toxic waste such as mercury, etc., which cannot meet the needs of modern society for high-efficiency, energy-saving, and environmentally friendly lighting.

Method used

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  • a ce <sup>3+</sup> , Dy <sup>3+</sup> Doped phosphor with controllable color and preparation method thereof
  • a ce <sup>3+</sup> , Dy <sup>3+</sup> Doped phosphor with controllable color and preparation method thereof
  • a ce <sup>3+</sup> , Dy <sup>3+</sup> Doped phosphor with controllable color and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] a Ce 3+ , Dy 3+ Doped color-controllable phosphors with a molar composition of Ca 2.93 (PO 4 ) 2 : 0.01Ce 3+ 0.06 Dy 3+ ;

[0028] The preparation method of the above-mentioned fluorescent powder with controllable color comprises the steps of:

[0029] (1) Accurately weigh calcium carbonate (CaCO 3 ) 5.2197g, ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) 4.5038g, cerium nitrate hexahydrate (Ce(NO 3 ) 3 •6H 2 O) 0.0773g, dysprosium oxide (Dy 2 o 3 )0.1992g;

[0030] (2) Fully grind the raw materials weighed above, mix them evenly and place them in a crucible, put them into a muffle furnace at a heating rate of 5°C / min to 600°C, and keep them warm for 2 hours; wait for the samples to cool naturally After reaching room temperature, the sample was taken out and fully ground again; the obtained powder was put into the muffle furnace again at a heating rate of 5 °C / min to 1100 °C, kept for 4 h, cooled to room temperature naturally, taken out, and ground to po...

Embodiment 2

[0032] a Ce 3+ , Dy 3+ Doped color-controllable phosphors with a molar composition of Ca 2.93 (P 0.9 B 0.1 o 4 ) 2 : 0.01Ce0.06Dy;

[0033] The preparation method of the above-mentioned fluorescent powder with controllable color comprises the steps of:

[0034] (1) Accurately weigh calcium carbonate (CaCO 3 ) 5.3307g, ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) 4.1397g, boric acid (H 3 BO 3 ) 0.2473g, cerium nitrate hexahydrate (Ce(NO 3 ) 3 •6H 2 O) 0.0789g, dysprosium oxide (Dy 2 o 3 )0.2034g;

[0035] (2) Fully grind the raw materials weighed above, mix them evenly and place them in a crucible, put them into a muffle furnace at a heating rate of 5°C / min to 600°C, and keep them warm for 2 hours; wait for the samples to cool naturally After reaching room temperature, the sample was taken out and fully ground again; the obtained powder was put into the muffle furnace again at a heating rate of 5 °C / min to 1100 °C, kept for 4 h, cooled to room temperature na...

Embodiment 3

[0037] a Ce 3+ , Dy 3+ Doped color-controllable phosphors with a molar composition of Ca 2.93 (P 0.8 B 0.2 o 4 ) 2 : 0.01Ce0.06Dy;

[0038] The preparation method of the above-mentioned fluorescent powder with controllable color comprises the steps of:

[0039] (1) Accurately weigh calcium carbonate (CaCO 3 ) 5.4466g, ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) 3.7597g, boric acid (H 3 BO 3 ) 0.5053g, cerium nitrate hexahydrate (Ce(NO 3 ) 3 •6H 2 O) 0.0806g, dysprosium oxide (Dy 2 o 3 )0.2078g;

[0040] (2) Fully grind the weighed raw materials, mix them evenly and place them in a crucible, put them into a muffle furnace at a heating rate of 5°C / min to 600°C, and keep them warm for 2 hours; wait for the samples to cool naturally to room temperature Finally, the sample was taken out and fully ground again; the obtained powder was put into the muffle furnace again at a heating rate of 5 °C / min to 1100 °C, kept for 4 h, cooled to room temperature naturally, t...

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Abstract

The invention relates to the technical field of light emitting materials, in particular to color-controllable fluorescent powder doped with Ce3+ and Dy3+ and a preparing method thereof. The color-controllable fluorescent powder is characterized by being composed of Ca2.93(P1-xBxO4)<2> to 0.01 Ce 0.06 Dy at the molar ratio, wherein x is larger than or equal to 0 and smaller than or equal to 0.5. Trivalent cerium ions (Ce3+) and dysprosium ions (Dy3+) serve as a light emitting center; the prepared fluorescent powder can emit light stably under the excitation of near ultraviolet light, and various kinds of light colors are mixed to form white light. According to the color-controllable fluorescent powder, by changing the matrix composition of the fluorescent powder, particularly changing the relative content of boron phosphate, light emitting of rare earth ions is controlled, and then the light emitting performance of the fluorescent powder is adjusted and controlled.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a Ce 3+ , Dy 3+ Doped phosphor with controllable color and preparation method thereof. Background technique [0002] At present, lighting sources represented by fluorescent lamps have many defects, such as low luminous efficiency, high energy consumption, short service life, and the generation of toxic waste such as mercury, etc., which cannot meet the needs of modern society for high-efficiency, energy-saving, and environmentally friendly lighting. Light Emitting Diode (LED) is a semiconductor light-emitting device that converts electrical energy into light energy. It has the advantages of energy saving, long life, and environmental protection. It can replace fluorescent lamps in the future and will play an important role in solving energy problems faced by human beings. effect. At this stage, the lack of adjustment of the luminescent spectrum of the phosphor po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/71
CPCC09K11/7778C09K11/778
Inventor 朱超峰陆萌石美玲
Owner QILU UNIV OF TECH
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