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Rare-earth europium-activated single-component white-light fluorescent powder and preparation method thereof

A fluorescent powder and single-component technology, which is applied in the direction of chemical instruments and methods, luminescent materials, and the use of gas discharge lamps, etc., can solve the problems of complex preparation process, complex chemical composition, and complex preparation process, and achieve low preparation cost. Wide luminous color gamut, simple and easy-to-operate effect

Inactive Publication Date: 2014-01-01
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, white light phosphors usually need to be modulated by red, green, and blue primary color phosphors containing different rare earths in proportion. Affects the overall luminous performance of white light phosphors; at the same time, the synthesis process of the three primary color phosphors is different, each phosphor needs to be prepared separately, and the preparation process is complicated; in addition, Eu 2+ Ion-activated phosphors such as BaMgAl 10 o 17 : Eu 2+ , usually need to adopt special means such as reducing atmosphere to prepare, the preparation process is complicated, the cost is high and the safety is poor

Method used

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  • Rare-earth europium-activated single-component white-light fluorescent powder and preparation method thereof
  • Rare-earth europium-activated single-component white-light fluorescent powder and preparation method thereof
  • Rare-earth europium-activated single-component white-light fluorescent powder and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh raw material CaCO 3 9.828g, Eu 2 o 3 0.352g, ZrO 2 12.347g, of which CaCO 3 and ZrO 2 Analytical pure, Eu 2 o 3 The purity is 99.9%. Put the raw materials into an agate mortar, add an appropriate amount of absolute ethanol and grind them thoroughly, then put them into a corundum crucible, place them in a heating furnace, and carry out initial burning in an atmospheric environment. The burning temperature is 1300°C, and the reaction time is 3 hours, and cooled to room temperature naturally after the reaction. The product obtained in the first step was mixed with 23.052g NH 4 h 2 PO 4 (Analytical pure) was put into an agate mortar, added an appropriate amount of absolute ethanol to grind and mix well, then put into a corundum crucible, and carried out secondary firing in an atmospheric environment, the firing temperature was 1200°C, and the reaction time was 6 hours. After the reaction was completed, the sample was taken out after being naturally cooled t...

Embodiment 2

[0026] Weigh raw material CaCO 3 9.728g, Eu 2 o 30.528g, ZrO 2 12.347g, of which CaCO 3 and ZrO 2 Analytical pure, Eu 2 o 3 The purity is 99.9%. Put the raw materials into an agate mortar, add an appropriate amount of absolute ethanol and grind them thoroughly, then put them into a corundum crucible, place them in a heating furnace, and carry out initial burning in an atmospheric environment. The burning temperature is 1250°C, and the reaction time is 2 hours, and cooled to room temperature naturally after the reaction. The product obtained in the first step was mixed with 23.052g NH 4 h 2 PO 4 (analytical pure) was put into an agate mortar, added an appropriate amount of absolute ethanol to grind and mix evenly, then put into a corundum crucible, and carried out secondary firing in an atmospheric environment, the firing temperature was 1100°C, and the reaction time was 10 hours. After the reaction was completed, the sample was taken out after being naturally cooled...

Embodiment 3

[0028] Weigh raw material CaCO 3 9.628g, Eu 2 o 3 0.705g, ZrO 2 12.347g, of which CaCO 3 and ZrO 2 Analytical pure, Eu 2 o 3 The purity is 99.9%. Put the raw materials into an agate mortar, add an appropriate amount of absolute ethanol and grind them thoroughly, then put them into a corundum crucible, place them in a heating furnace, and perform initial burning in an atmospheric environment. The burning temperature is 1200°C and the reaction time is 4 hours, and cooled to room temperature naturally after the reaction. The product that the first step makes and 23.052gNH 4 h 2 PO 4 (analytical pure) was put into an agate mortar, added an appropriate amount of absolute ethanol to grind and mix evenly, then put it into a corundum crucible, and carried out secondary firing in an atmospheric environment, the firing temperature was 1100°C, and the reaction time was 24 hours. After the reaction was completed, the sample was taken out after being naturally cooled to room tem...

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Abstract

The invention discloses a rare-earth europium-activated single-component white-light fluorescent powder and a preparation method thereof. The chemical formula of the fluorescent powder is (Ca1-xEux)Zr(PO4)2 (0.005<=x<=0.10). The preparation method adopts a two-step solid-phase synthesis method in air, and comprises the following steps: 1. uniformly grinding and mixing CaCO3, ZrO2 and Eu2O3 used as raw materials, and igniting at the high temperature of 1100-1400 DEG C for 1-4 hours to prepare (Ca1-xEux)ZrO3; and 2. uniformly grinding and mixing the (Ca1-xEux)ZrO3 with a right amount of NH4H2PO4 or (NH4)2HPO4 or (NH4)3PO4, and igniting at the high temperature of 1100-1300 DEG C for 3-24 hours to synthesize the end product (Ca1-xEux)Zr(PO4)2. The obtained sample can emit white light under the 200-350nm ultraviolet irradiation, has wide light-emitting color range, and can cover the whole visible light wave range. By utilizing the characteristics of the fluorescent material matrix compound CaZr(PO4)2 in the crystal structure, the Eu<2+> / Eu<3+>-coactivated CaZr(PO4)2 white-light fluorescent material can be prepared in air without multiple rare earth ions or use of a reducing atmosphere. The preparation method is simple and safe, and is easy to operate and low in production cost.

Description

technical field [0001] The invention belongs to the field of rare earth luminescent materials, in particular to a rare earth europium-activated single-component white light phosphor and a preparation method thereof. Background technique [0002] In 1973, Philips of the Netherlands first proposed the three-color phosphor technology for lamps, and the red-emitting Y 2 o 3 : Eu 3+ , Green-emitting CeMgAl 11 o 19 :Tb 3+ and blue-emitting BaMgAl 10 o 17 : Eu 2+ The three kinds of rare earth phosphors are mixed in a certain proportion and emit white light under the excitation of ultraviolet light. Because of the advantages of high luminous efficiency and high luminous color, the rare earth three-color phosphor is regarded as a new type of green and energy-saving luminescent material and has been developed rapidly. It has gradually replaced incandescent lamps with high energy consumption and low efficiency, and has become an extremely important lamp in the lighting field. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/71
CPCY02B20/181Y02B20/00
Inventor 张君诚龙云泽张红娣孙彬韩文鹏
Owner QINGDAO UNIV
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