Broadband emission fluorescent powder material and preparation method thereof

A phosphor and broadband technology, which is applied in the field of broadband emitting phosphor materials and their preparation, can solve the problems of less research on solid luminescent materials, and achieve the effects of easy operation and mass production, simple preparation methods, and wide excitation range

Active Publication Date: 2018-11-23
SOUTHEAST UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, people's research in the field of solid luminescent materials has focused on the visible light region and the near-ultraviolet region. There are few studies on solid luminescent materials that can be effectively excited by blue light and emit near-infrared light, and there are no corresponding mature products on the market; therefore , there is an urgent need for further in-depth research on near-infrared luminescent materials, so as to construct high-performance and multi-purpose near-infrared fluorescent materials from a new way

Method used

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  • Broadband emission fluorescent powder material and preparation method thereof
  • Broadband emission fluorescent powder material and preparation method thereof
  • Broadband emission fluorescent powder material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0035] A broadband emission phosphor material, the chemical expression of the phosphor is Ca 3 Sc 1.97 Si 3 o 12 : 0.03Cr, its preparation steps are as follows:

[0036] 1. Weigh the raw material CaCO 3 9mmol, Sc 2 o 3 2.955mol, SiO 2 9mmol, Cr 2 o 3 0.045mmol;

[0037] 2. Fully mix the weighed raw materials, sinter in air at 1425°C for 2 hours, and cool down to room temperature naturally to obtain a roasted product;

[0038] 3. After fully grinding the obtained roasted product into powder and passing through a 200-mesh sieve, washing with deionized water for 3 times, and drying at 80°C, the Ca 3 Sc 1.97 Si 3 o 12 : 0.03Cr broadband emission phosphor material.

[0039] The excitation spectrum and emission spectrum of the broadband emitting phosphor material prepared in this embodiment are shown in the attached figure 1 shown.

Embodiment 2

[0041] A broadband emission phosphor material, the chemical expression of the phosphor is Ca 3 Sc 1.99 Si 3 o 12 : 0.01Cr, its preparation steps are as follows:

[0042] 1. Weigh the raw material CaCO 3 9mmol, Sc 2 o 3 2.985mol, SiO 2 9mmol, Cr 2 o 3 0.015mmol;

[0043] 2. Fully mix the weighed raw materials, sinter in the air at 1425°C for 1 hour, and naturally cool down to room temperature to obtain a roasted product;

[0044] 3. After fully grinding the obtained roasted product into powder and passing through a 200-mesh sieve, washing with deionized water for 3 times, and drying at 80°C, the Ca 3 Sc 1.99 Si 3 o 12 : 0.01Cr broadband emitting phosphor material.

[0045] The excitation spectrum and emission spectrum of the broadband emitting phosphor material prepared in this embodiment are similar to those in Embodiment 1.

Embodiment 3

[0047] A broadband emission phosphor material, the chemical expression of the phosphor is Ca 3 sc 1.9 Si 3 o 12 : 0.1Cr, its preparation steps are as follows:

[0048] 1. Weigh the raw material CaCO 3 9mmol, Sc 2 o 3 2.85mol, SiO 2 9mmol, Cr 2 o 3 0.15mmol;

[0049] 2. Fully mix the weighed raw materials, sinter in the air at 1425°C for 2 hours, and naturally cool down to room temperature to obtain a roasted product;

[0050] 3. Fully grind the roasted product into powder and pass through a 200-mesh sieve, wash once with deionized water, and dry at 130°C to obtain the Ca 3 sc 1.9 Si 3 o 12 : 0.1Cr broadband emission phosphor material.

[0051] The excitation spectrum and emission spectrum of the broadband emitting phosphor material prepared in this embodiment are similar to those in Embodiment 1.

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Abstract

The invention discloses a broadband emission fluorescent powder material and a preparation method thereof. The chemical expression formula of the fluorescent powder is Ca3Sc<2-x>Si3O12:xCr, wherein xis greater than or equal to 0.01 but is smaller than or equal to 0.1. The fluorescent powder material comprises the following preparation steps that (1) raw materials are weighed according to the chemical composition proportion of the broadband emission fluorescent powder material; (2) the raw materials are uniformly mixed, or after reaction fluxing agents are added, the raw materials and the reaction fluxing agents are uniformly mixed; then, firing is performed to obtain a roasted product; (3) the roasted product is ground into powder; after the washing and drying, the broadband emission fluorescent powder material is obtained. The prepared fluorescent powder material has stable chemical performance and excellent luminescent performance, and can be excited by a blue light LED chip for building a fluorescence conversion type LED device. The preparation method is simple; the operation is easy; no pollution exists; the cost is low.

Description

technical field [0001] The invention relates to a broadband emitting phosphor material and a preparation method thereof, belonging to the technical field of solid luminescent materials. Background technique [0002] Near-infrared light has important applications in emerging technology fields such as minimally invasive diagnosis, biological imaging, spectral test light source, food detection, optical fiber communication and night vision technology. With the gradual rise of these emerging technologies, near-infrared light has also attracted widespread attention from all walks of life. At present, the mainstream near-infrared light sources in the market mainly include three types: tungsten filament incandescent lamps, near-infrared LEDs and near-infrared lasers; among them, tungsten filament incandescent lamps have ultra-wide near-infrared light emission, but they are large in size, low in power and short in life. and other defects; near-infrared LEDs have defects such as low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79
CPCC09K11/7774C09K11/7776
Inventor 姚乐琪邵起越董岩蒋建清
Owner SOUTHEAST UNIV
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