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A kind of ultraviolet fluorescent material and preparation method thereof

A fluorescent material and ultraviolet technology, applied in the field of ultraviolet fluorescent materials and their preparation, can solve the problems of high cost, long preparation cycle, toxicity of sodium dicyandiamide, etc., and achieve low cost, short preparation cycle and good repeatability

Active Publication Date: 2018-12-21
JIANGSU NADN SCI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method has a long preparation cycle and high cost, and the raw material sodium dicyandiamide has certain toxicity

Method used

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  • A kind of ultraviolet fluorescent material and preparation method thereof
  • A kind of ultraviolet fluorescent material and preparation method thereof
  • A kind of ultraviolet fluorescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 4g of melamine and 1.2g of sodium carbonate in a mortar, add absolute ethanol and wet grind to obtain precursor A, put precursor A into an alumina crucible, calcinate in a muffle furnace at 550°C for 2 hours, and cool with the furnace Obtain sample B, grind and dissolve sample B in 50ml of deionized water to obtain a colorless transparent solution, add 50ml of absolute ethanol, the substance precipitates, centrifuge, put it in an oven and dry at 70°C for 12 hours to obtain phosphor powder.

[0018] See attached figure 1 , which is the XRD diffraction pattern of the ultraviolet phosphor powder prepared in this example, from figure 1 It can be seen that the intensity of the diffraction peak is high and sharp, indicating that the synthesized high temperature resistant phosphor has good crystallinity.

[0019] See attached figure 2 , which is the infrared spectrogram of the ultraviolet fluorescent powder prepared in this example, from figure 2 As can be seen in t...

Embodiment 2

[0022] Weigh 4g of melamine and 1.6g of sodium carbonate in a mortar, add absolute ethanol and wet grind to obtain precursor A, put precursor A into an alumina crucible, calcinate in a muffle furnace at 550°C for 2 hours, and cool with the furnace Obtain sample B, grind and dissolve sample B in 50ml of deionized water to obtain a colorless transparent solution, add 50ml of absolute ethanol, the substance precipitates, centrifuge, put it in an oven and dry at 70°C for 12 hours to obtain phosphor powder.

Embodiment 3

[0024] Weigh 4g of melamine and 2g of sodium carbonate in a mortar, add absolute ethanol and wet grind to obtain precursor A, put precursor A into an alumina crucible, calcinate in a muffle furnace at 550°C for 2 hours, and obtain Sample B, grind and dissolve sample B in 50ml of deionized water to obtain a colorless transparent solution, add 50ml of absolute ethanol, the substance precipitates, centrifuge, put it in an oven for 12 hours at 70°C, and obtain a fluorescent powder.

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Abstract

The invention discloses an ultraviolet fluorescence material and a preparation method thereof. The molecular formula of the fluorescence material is Na3C6N9.3H2O. The preparation method comprises the steps that melamine and sodium carbonate are taken as raw materials and subjected to wet grinding with ethyl alcohol to prepare precursor powder, then the precursor powder is calcined at high temperature and naturally cooled to obtain a sample, the sample is dissolved into deionized water to obtain a colorless transparent solution, absolute ethyl alcohol is added into the colorless transparent solution, substances are separated out, centrifugal separating and drying are conducted, and the product is obtained. The ultraviolet fluorescence material prepared according to the technical scheme has the good ultraviolet fluorescence property. According to the ultraviolet fluorescence material, the raw materials are poisonless and easy to obtain, the price is low, the process repeatability is good, and the product is short in preparation cycle and low in cost.

Description

technical field [0001] The invention relates to an ultraviolet fluorescent material and a preparation method thereof. Background technique [0002] Liquid crystal display is widely favored by people because of its low operating voltage, low energy consumption and a series of excellent characteristics such as no radioactivity. However, it has two main disadvantages, namely, the small viewing angle and low transmittance, which limit its brightness and contrast, and have always affected its application and development. Until 1997, W. A. ​​Crossland and others in Cambridge, UK, proposed the concept of Photoluminescent Liquid Crystal Display (PLLCD), combining photoluminescent phosphors with liquid crystals to form a new liquid crystal display mode. A new approach is proposed to completely solve these problems that seriously affect the quality of liquid crystal display. Photoluminescent liquid crystal displays are also sometimes referred to as liquid crystal modulated photolumi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C09K11/65
CPCC09K11/06C09K11/65C09K2211/10
Inventor 郑敏李伟峰王作山
Owner JIANGSU NADN SCI TECH CO LTD
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