Mn < 4 + > activated antimonate narrow-band red fluorescent powder and preparation method thereof

A red phosphor, antimonate technology, applied in chemical instruments and methods, luminescent materials, electrical components, etc., to achieve the effects of simple preparation process, narrow emission peak, and low synthesis temperature

Pending Publication Date: 2021-09-17
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings and deficiencies in the prior art and solve the bottleneck problem faced by the red light component of the current white light LED, the present invention provides a device that can emit red fluorescence

Method used

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  • Mn &lt; 4 + &gt; activated antimonate narrow-band red fluorescent powder and preparation method thereof
  • Mn &lt; 4 + &gt; activated antimonate narrow-band red fluorescent powder and preparation method thereof
  • Mn &lt; 4 + &gt; activated antimonate narrow-band red fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] According to Li 4 al 1-0.5x Sb 1-0.5x o 6 :0.3%Mn 4+ The stoichiometric ratio, accurately weighed raw materials: 1.4778 grams of lithium carbonate, 0.5090 grams of alumina, 1.6152 grams of antimony pentoxide and 0.0034 grams of manganese carbonate. After fully grinding these raw materials and an appropriate amount of ethanol solution in an agate mortar, the obtained mixture was put into a muffle furnace and heated to 950° C. for 7 hours in an air atmosphere for calcination. After calcination, after cooling down to room temperature naturally, take it out and grind it evenly to get Li 4 AlSbO 6 :0.3%Mn 4+ red phosphor.

Embodiment 2

[0034] According to Li 4 al 1-0.5x Sb 1-0.5x o 6 :0.5%Mn 4+ According to the stoichiometric ratio, the raw materials were accurately weighed: 1.4778 grams of lithium carbonate, 0.5085 grams of alumina, 1.6136 grams of antimony pentoxide and 0.0057 grams of manganese carbonate. After fully grinding these raw materials and an appropriate amount of ethanol solution in an agate mortar, the obtained mixture was put into a muffle furnace and heated to 1000° C. for 6 hours in an air atmosphere for calcination. After calcination, after cooling down to room temperature naturally, take it out and grind it evenly to get Li 4 AlSbO 6 :0.5%Mn 4+ red phosphor.

[0035] See attached figure 1 , which is the X-ray powder diffraction pattern of the sample prepared according to the technical scheme of this embodiment, and the test results show that the crystallinity of the prepared sample is relatively good, and it is a single-phase material.

[0036] See attached figure 2, which is t...

Embodiment 3

[0039] According to Li 4 Al 1-0.5x Sb 1-0.5x o 6 :0.7%Mn 4+ The stoichiometric ratio, accurately weighed raw materials: 1.4778 grams of lithium carbonate, 0.5080 grams of alumina, 1.6119 grams of antimony pentoxide and 0.0080 grams of manganese carbonate. After fully grinding these raw materials and an appropriate amount of ethanol solution in an agate mortar, the obtained mixture was put into a muffle furnace and heated to 1050° C. for 5 hours in an air atmosphere for calcination. After calcination, after cooling down to room temperature naturally, take it out and grind it evenly to get Li 4 AlSbO 6 :0.7%Mn 4+ red phosphor.

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Abstract

The invention discloses Mn < 4 + > activated antimonate narrow-band red fluorescent powder and a preparation method thereof. The general chemical formula of the fluorescent powder is Li<4>M<1-0. 5x>Sb<1-0. 5x>O<6>: xMn < 4 + >, M is at least one of Al and Ga, x is the molar ratio of Mn < 4 + > doping, and x is more than 0 and less than or equal to 0.03. The fluorescent powder has the characteristics of broadband excitation and narrowband emission, can be well matched with commercial near ultraviolet or blue light LED chips, and is narrow in emission peak and high in color purity. In addition, the fluorescent powder is prepared by adopting a high-temperature solid-phase synthesis method, the synthesis process is simple, the synthesis temperature is low, the chemical performance is stable, and no pollution is caused. The fluorescent powder can be widely applied to illumination of warm white light LED devices excited by near ultraviolet or blue light LED chips.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a Mn4+-activated antimonate narrow-band red fluorescent powder and a preparation method thereof. Background technique [0002] Compared with traditional lighting sources such as incandescent lamps and fluorescent lamps, white LEDs are known as a new generation of green solid-state lighting sources due to their small size, low energy consumption, long service life, and no pollution. They have very important application values. and broad market prospects. [0003] So far, the most mature and easy-to-achieve method for obtaining white light is to combine blue-light InGaN chips with commercial yellow phosphor Y 3 al 5 o 12 : Ce 3+ (YAG:Ce 3+ ) combined, the principle is YAG:Ce 3+ The phosphor powder absorbs part of the blue light emitted by the chip, and the emitted yellow light mixes with the unabsorbed blue light to form white light. However, due to...

Claims

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Application Information

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IPC IPC(8): C09K11/75H01L33/50
CPCC09K11/751C09K11/757H01L33/502Y02B20/00
Inventor 郭锐李志远罗岚
Owner NANCHANG UNIV
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