Cerium-ion-doped silicate blue fluorescent powder and preparation method thereof

A blue phosphor and silicate technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of InGaN chip matching, easy agglomeration of phosphor powder, high synthesis temperature, etc., and achieve chromaticity and photometric stability Good, cheap and easy to get raw materials, good development effect

Inactive Publication Date: 2013-05-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the near-ultraviolet LED blue phosphor is mainly BaMgAl10O17:Eu 2+ (BAM), but the absorption of BAM at 400nm is very weak, it cannot be well matched with InGaN chips, and the synthesis temperature is high, and the phosphor powder is easy to agglomerate at the synthesis temperature of 1300 ° C, so it is necessary to develop a new type Near-ultraviolet-excited blue phosphors to replace the current commercial BAM

Method used

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  • Cerium-ion-doped silicate blue fluorescent powder and preparation method thereof
  • Cerium-ion-doped silicate blue fluorescent powder and preparation method thereof

Examples

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Embodiment 1

[0023] According to Sr 1.9999 MgSi 2 o 7 : 0.0001Ce 3+ The stoichiometric ratio of each element, accurately weighed analytically pure SrCO 3 , MgO, SiO 2 , CeO 2 and H 3 BO 3 Put it in an agate mortar, add a small amount of alcohol to grind for 30~60min, H 3 BO 3 with SrCO 3 The molar ratio is 0.03:1. After drying at 60~120°C, continue to grind for 10 minutes, then place it in a crucible at 1100°C for 48 hours, wait for the temperature to drop to room temperature, take out the product, crush it, grind it, and classify it to get The blue phosphor to be prepared.

Embodiment 2

[0025] According to Sr 1.99 MgSi 2 o 7 : 0.01Ce 3+ The stoichiometric ratio of each element, accurately weighed analytically pure SrCO 3 , MgO, SiO 2 , CeO 2 and H 3 BO 3 Put it in an agate mortar, add a small amount of alcohol to grind for 30~60min, H 3 BO 3 with SrCO 3 The molar ratio is 0.01:1. After drying at 60~120°C, continue to grind for 10 minutes, then place it in a crucible at 1200°C for 24 hours, wait for the temperature to drop to room temperature, take out the product, crush it, grind it, and classify it to get The blue phosphor to be prepared.

Embodiment 3

[0027] According to Sr 1.97 MgSi 2 o 7 : 0.03Ce 3+ The stoichiometric ratio of each element, accurately weighed analytically pure SrCO 3 , MgO, SiO 2 , CeO 2 and H 3 BO 3 Put it in an agate mortar, add a small amount of alcohol to grind for 30~60min, H 3 BO 3 with SrCO 3 The molar ratio is 0.05:1. After drying at 60~120°C, continue to grind for 10 minutes, then place it in a crucible at 1250°C for 12 hours, wait for the temperature to drop to room temperature, take out the product, crush it, grind it, and classify it to get The blue phosphor to be prepared.

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Abstract

The invention provides cerium-ion-doped silicate blue fluorescent powder and a preparation method thereof. The chemical formula of the cerium-ion-doped silicate blue fluorescent powder is Sr2-xMgSi2O7:xCe<3+>, wherein x is more than or equal to 0.0001 and less than or equal to 0.3; and the preparation method comprises the following steps of: 1) weighing a compound containing Sr, a compound containing Mg, a compound containing Si and a compound containing Ce, mixing and then grinding for 30-60 minutes; 2) drying the ground mixed powder and continuously grinding to form powder; 3) carrying out high-temperature calcining for 2-48 hours in reducing atmosphere; and 4) crushing and grinding the calcined powder, and grading to obtain the cerium-ion-doped silicate blue fluorescent powder. The blue fluorescent powder prepared by the invention is good in crystal development and wider in emission spectrum and can better meet the packaging requirement of a white LED (light-emitting diode), chromaticity and luminosity stability are better, raw materials are cheap and easy to get, the preparation method is simple and practicable, and industrial production can be realized.

Description

technical field [0001] The invention relates to luminescent materials, in particular to a cerium ion-doped silicate blue fluorescent powder and a preparation method thereof. Background technique [0002] As a new type of solid-state light source, white light LED (White Light Emitting Diodes, WLED) has great application prospects in the field of lighting and display due to its many advantages such as energy saving, environmental protection, long life and small size. At present, there are three ways to use LED technology to achieve white light: (1) The blue light chip excites the yellow light emitted by the yellow phosphor and the remaining blue light to combine into white light; (2) Use the near-ultraviolet LED chip to excite the three primary colors of red, green and blue Phosphor powder is organically combined to form white light; (3) Red light chip, green light chip and blue light chip are assembled together to realize white light. At present, the first form is the mainst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59
Inventor 宁青菊乔畅君李向龙高丹鹏于成龙史永胜
Owner SHAANXI UNIV OF SCI & TECH
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