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A rare earth borate-based red phosphor

A red phosphor, borate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of low luminous efficiency, impure chromaticity, large light decay, etc.

Active Publication Date: 2017-05-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, many units at home and abroad have devoted themselves to the research of rare earth borate red phosphors, and prepared a series of red phosphors for lamps and displays (Y 2 o 3 : Eu 3+ 、YBO 3 : Eu 3+ ), and showed good optical properties, but compared with the currently commercialized phosphors, there are still some defects, such as low luminous efficiency, large light attenuation, impure chromaticity, etc.

Method used

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  • A rare earth borate-based red phosphor
  • A rare earth borate-based red phosphor
  • A rare earth borate-based red phosphor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: (In 0.88 ,Al 0.03 , Eu 0.09 )(Ca 0.94 , Ba 0.06 )BO 4 Phosphor powder preparation

[0035] Weigh 0.9314g CaCO 3 , 0.1172g BaCO 3 , 1.0995g In 2 o 3 , 0.1425g Eu 2 o 3 , 0.0138gAl 2 o 3 and 0.6864g H 3 BO 3 Put it in an agate mortar and grind for 30 minutes to mix the ingredients evenly. Put the raw materials into a crucible and place them in a muffle furnace for pre-sintering (sintering temperature 600°C, heating rate 5°C / min, keep warm for 12 hours and then cool to room temperature with the furnace), and grind the pre-fired samples for 20 minutes before sintering Two-step final firing (the first stage sintering temperature is 1050°C, after 12 hours of heat preservation, cool to room temperature with the furnace, and grind for 10 minutes; the second stage sintering temperature is 1080°C, after 12 hours of heat preservation, cool to room temperature with the furnace, the heating rate of the two-step sintering both at 4°C / min). Take out the ...

Embodiment 2

[0036] Embodiment 2: (In 0.89 ,Al 0.02 , Eu 0.09 )(Ca 0.94 , Ba 0.06 )BO 4 Phosphor powder preparation

[0037] Weigh 0.9314g CaCO 3 , 0.1172g BaCO 3 , 1.1119g In 2 o 3 , 0.1425g Eu 2 o 3 , 0.0092gAl 2 o 3 and 0.6864g H 3 BO 3 , the rest of the steps are the same as in Example 1.

Embodiment 3

[0038] Embodiment 3: (In 0.87 ,Al 0.04 , Eu 0.09 )(Ca 0.94 , Ba 0.06 )BO 4 Phosphor powder preparation

[0039] Weigh 0.9314g CaCO 3 , 0.1172g BaCO 3 , 1.0870g In 2 o 3 , 0.1425g Eu 2 o 3 , 0.0184gAl 2 o 3 and 0.6864g H 3 BO 3 , the rest of the steps are the same as in Example 1.

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Abstract

The invention discloses rare earth borate-based red fluorescent powder. According to the fluorescent powder, CaInBO4 is used as a base body, 0.02-0.08 at.% of Al<3+> is doped to enter In<3+> bit, 0.02-0.08 at.% of Ba<2+> is doped to enter Ca<2+> bit and 0.07-0.10 at.% of Eu<3+> is doped to enter In<3+> bit, so that fluorescent powder (In(1-x-z), Alx, Euz)(Ca(1-y), Bay)BO4 is obtained, wherein x is equal to 0.02-0.04, y is equal to 0.05-0.07, and z is equal to 0.07-0.1. The rare earth borate-based red fluorescent powder provided by the invention has excellent properties of high luminous intensity, warm color, rapid decay, short persistence, good heat stability, easiness in long-term preservation and wide application range.

Description

technical field [0001] The invention relates to the field of rare earth luminescent materials, in particular to a rare earth borate-based red fluorescent powder which can be applied to trichromatic fluorescent lamps and plasma flat panel displays (PDP). Background technique [0002] Most of the current commercial light sources need to use phosphors for light conversion. Fluorescent lamps made of rare earth tricolor phosphors are very efficient and energy-saving new light sources. They are the key development direction of the world's lighting sources. There is a huge demand for primary color phosphors, and the supply is basically in short supply. Because the rare earth three-color fluorescent lamp has the characteristics of high luminous efficiency, low light decay and long life, it has been widely recognized and developed rapidly in the current environment where energy conservation and emission reduction are vigorously advocated. my country is also the world's largest produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 蔡格梅刘红星刘华山金展鹏
Owner CENT SOUTH UNIV
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