Method for rapidly preparing solid light-emitting material

A solid-state luminescent and fast technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of high energy consumption and long preparation cycle, and achieve the effects of low energy consumption, low cost and simple preparation steps

Inactive Publication Date: 2017-05-31
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method usually needs to be prepared at a high temperature for several hours, the reaction process consumes a lot of energy, and the preparation cycle is long.

Method used

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  • Method for rapidly preparing solid light-emitting material
  • Method for rapidly preparing solid light-emitting material
  • Method for rapidly preparing solid light-emitting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 0.5 g of citric acid, 0.17 g of methylamine hydrochloride, and 0.78 g of lanthanum chloride heptahydrate, place them in a mortar, grind them well and mix them evenly, transfer them to a conical flask, place them in a microwave oven for 4 minutes, and the reaction is over Then the solid luminescent material can be obtained.

Embodiment 2

[0026] Take 0.5 g of citric acid, 0.35 g of methylamine hydrochloride, and 0.39 g of lanthanum chloride heptahydrate, place them in a mortar, grind them well and mix them evenly, transfer them to a conical flask, place them in a microwave oven for pyrolysis for 1 minute, and the reaction is over Then the solid luminescent material can be obtained.

[0027] Such as figure 1 As shown, the maximum emission wavelength of the solid luminescent material prepared in Example 1 is about 580nm; figure 2 , image 3 As shown, the material prepared by the aqueous phase method has no obvious emission spectrum, and the solid has no fluorescence signal; as Figure 4 As shown, the solid-phase luminescent material prepared in Example 2 can see obvious yellow fluorescence under a 365nm ultraviolet lamp, and the product yield is high, and it has great application prospects in mass production and industrial promotion.

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Abstract

The invention discloses a method for rapidly preparing a solid light-emitting material. According to the method, citric acid, amine hydrochloride and rare earth metal salt are taken as raw materials and subjected to a microwave-assisted pyrolysis reaction after being directly ground and mixed uniformly, wherein amine hydrochloride is methylamine hydrochloride, ethylamine hydrochloride, ethylenediamine hydrochloride or propylamine hydrochloride; the rare earth metal salt is halide salt containing lanthanum or yttrium, sulfate containing lanthanum or yttrium, or nitrate containing lanthanum or yttrium. By means of the provided method, the defects of a conventional method for preparing the solid light-emitting material are overcome; preparation steps of the method are simple, preparation is fast and consumes short time (the pyrolysis process lasts for less than 5 minutes), the cost is low, energy consumption is low, and the reaction conditions are mild. According to the method, the material with the light emitting function can be obtained by directly pyrolyzing a solid mixture with microwaves, no solvent is needed, dependence on a reaction solvent is eliminated, and the method is suitable for large-scale production and industrial popularization.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, and more specifically relates to a method for rapidly preparing solid luminescent materials. Background technique [0002] Solid luminescent materials have been widely used in optoelectronics, laser, lighting, display, radiation detection, medicine, agriculture and so on. With the development of society and the progress of technology, new requirements are put forward for the properties and preparation methods of solid luminescent materials. At present, the methods used to prepare solid luminescent materials mainly include: chemical precipitation method, sol-gel method, spray pyrolysis method, hydrothermal synthesis method, high-temperature solid-state sintering method, etc. [0003] The chemical precipitation method is to dissolve various raw materials in the same solution, and then add a precipitating agent or hydrolyze the solution at a certain temperature to form a...

Claims

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Application Information

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IPC IPC(8): C09K11/77
CPCC09K11/77
Inventor 欧阳钢锋杨升宏陈晓
Owner SUN YAT SEN UNIV
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