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Chlorosilicate phosphor powder and preparation method thereof

A technology of chlorosilicate and fluorescent powder, which is applied in the field of zinc-doped chlorosilicate and its preparation, and can solve the problems of no intensity enhancement and sacrificed emission intensity, etc.

Inactive Publication Date: 2010-05-05
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents can change the color range of the emission spectrum of the phosphor, but often do not enhance the intensity of the emission spectrum of the phosphor or even sacrifice its emission intensity

Method used

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  • Chlorosilicate phosphor powder and preparation method thereof
  • Chlorosilicate phosphor powder and preparation method thereof
  • Chlorosilicate phosphor powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Accurately weigh 28.34g SrCO 3 , 18.03gSiO 2 , 53.3g SrCl 2 ·6H 2 O, 1.41g Eu 2 o 3 . Grind and mix the above raw materials evenly, put them into a corundum crucible, vibrate and compact, coat a large crucible, put carbon powder in the interlayer and cover it, put it in a high-temperature resistance furnace at room temperature, pre-fire at 850°C for 1 hour, and take it out after high-temperature heat Grind after cooling, then react at a constant temperature of 915°C for 3 hours, cool down to room temperature with the furnace, grind, wash, filter, and dry to obtain the final product. The resulting phosphor composition is Sr 3.92 Eu 0.08 Si 3 o 8 Cl 4 , emits blue light under 325nm ultraviolet excitation, and the emission peak is located at 488nm, see figure 1 and figure 2 The curve a.

Embodiment 2

[0017] Accurately weigh 26.87g SrCO 3 , 0.814g ZnO, 18.03gSiO 2 , 53.3g SrCl 2 ·6H 2 O, 1.41g Eu 2 o 3 . Grind and mix the above raw materials evenly, put them into a corundum crucible, vibrate and compact, coat a large crucible, put carbon powder in the interlayer and cover it, put it in a high-temperature resistance furnace at room temperature, pre-fire at 850°C for 1 hour, and take it out after high-temperature heat After cooling, grind, then react at a constant temperature of 915°C for 3 hours, cool down to room temperature with the furnace, grind, wash, filter, and dry to obtain the final product. The resulting phosphor composition is Sr 3.82 Zn 0.1 Eu 0.08 Si 3 o 8 Cl 4 , emits blue light under 325nm ultraviolet excitation, and the emission peak is located at 488nm, see figure 1 and figure 2 The curve b.

Embodiment 3

[0019] Accurately weigh 25.39gSrCO 3 , 1.63g ZnO, 25.39g SiO 2 , 53.3g SrCl 2 ·6H 2 O, 1.41g Eu 2 o 3 . Grind and mix the above raw materials evenly, put them into a corundum crucible, vibrate and compact, coat a large crucible, put carbon powder in the interlayer and cover it, put it in a high-temperature resistance furnace at room temperature, pre-fire at 850°C for 1 hour, and take it out after high-temperature heat After cooling, grind, then react at a constant temperature of 915°C for 3 hours, cool down to room temperature with the furnace, grind, wash, filter, and dry to obtain the final product. The resulting phosphor composition is Sr 3.72 Zn 0.2 Eu 0.08 Si 3 o 8 Cl 4 , emits blue light under 325nm ultraviolet excitation, and the emission peak is located at 488nm, see figure 1 and figure 2 The curve c.

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Abstract

The invention relates to a chlorosilicate phosphor powder and a preparation method thereof. The chlorosilicate phosphor powder is used for enhancing the excitation and emission intensity of the chlorosilicate phosphor powder so as to obtain higher luminous efficiency. The general formula of the chlorosilicate phosphor powder is (Sr4-x-yZnxEuy)Si3O8C14, wherein x is more than 0, but smaller than 0.2, and y is not less than 0.001, but not more than 0.2.The preparation method of the phosphor powder comprises the following steps of: accurately weighing raw materials according to the formula proportion, uniformly mixing and grinding the oxides of the elements in the structural formula and corresponding salts, pre-sintering firstly at 800-900 DEG C for 0.5-2 hours under a reducing atmosphere, taking out at high temperature and cooling, levigating, then sintering at 800-1000 DEG C for 1-4 hours, levigating the sintered materials and obtaining a final product; or uniformly mixing and grinding the raw materials, sintering at 800-1000 DEG C for 2-4 hours under the reduction atmosphere, furnace cooling and levigating, washing by water, filtering, drying and obtaining the final product.

Description

technical field [0001] The invention relates to a chlorosilicate fluorescent powder, in particular to a zinc-doped chlorosilicate and a preparation method thereof. Background technique [0002] Chlorosilicates have good luminescent properties and chemical stability, and have been extensively studied in recent years. Europium activated chlorosilicate Sr 4 Si 3 o 8 Cl 4 It can be used in fields such as anti-counterfeiting technology, high-pressure mercury lamps and white light LEDs. Therefore, it is very important to further improve the spectral characteristics of the fluorescent material and increase the luminous intensity. [0003] U.S. Patent US4128498 discloses a chlorosilicate fluorescent powder that can change the color range, and its chemical formula is Sr 4-x-y be x Si 3 o 8 :yEu 2+ , this phosphor can be effectively excited by ultraviolet rays and vacuum ultraviolet rays and emit blue-green light. Chinese patent CN1640985A discloses a chlorosilicate fluores...

Claims

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Application Information

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IPC IPC(8): C09K11/86
Inventor 章少华胡江峰谢冰严明明许玉华
Owner NANCHANG UNIV