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Preparation method of high-quantum-efficiency blue-light-emitting BCNO phosphor

A fluorescent powder, high-quantum technology, applied in chemical instruments and methods, luminescent materials, inorganic chemistry, etc., can solve the problems that are not conducive to the batch production of BCNO phosphor powder, green environmental protection, environmental pollution, and ammonia gas production, and achieve sintering time Insensitive, simple and easy method, same efficiency effect

Active Publication Date: 2014-09-17
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, people generally use urea combustion method to prepare BCNO phosphor. Although this method is simple to prepare, the controllability of this method is poor, and the sintering time has a great influence on the emission spectrum. At the same time, when the urea is heated, it will produce ammonia gas, which will cause environmental pollution
Therefore, the urea combustion method is not conducive to the mass production of BCNO phosphors and the needs of green environmental protection

Method used

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  • Preparation method of high-quantum-efficiency blue-light-emitting BCNO phosphor
  • Preparation method of high-quantum-efficiency blue-light-emitting BCNO phosphor
  • Preparation method of high-quantum-efficiency blue-light-emitting BCNO phosphor

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Effect test

Embodiment 1

[0024] 1. Add 80mL of deionized water to the flask and heat to 85°C;

[0025] 2. When the solution temperature in the flask is 85°C, add 0.01mol of boric acid and 0.01mol of melamine, keep stirring until the solution is clear, and the solution temperature is kept at 85°C;

[0026] 3. Add 0.001 mol of hexamethylenetetramine to the solution, stir the solution continuously until it becomes clear, keep the solution temperature at 85°C, pour the solution into a beaker after stirring for 6 hours, heat the solution to 100°C and stir at the same time, Until the water is evaporated to dryness, the precursor of BCNO is obtained;

[0027] 4. Take out the precursor of BCNO, put it into the muffle furnace for low-temperature sintering, the sintering temperature is 625°C, and the sintering time is 12 hours; after the sintering, close the muffle furnace to cool naturally, and take it out after the temperature of the muffle furnace drops to room temperature Samples were fully ground in an ag...

Embodiment 2

[0029] Other steps are the same as in Example 1, except that the molar number of hexamethylenetetramine in step 2 is changed from 0.001mol to 0.002mol.

Embodiment 3

[0031] Other steps are the same as in Example 1, except that the molar number of hexamethylenetetramine in step 2 is changed from 0.001mol to 0.003mol.

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Abstract

The invention relates to a preparation method of a high-quantum-efficiency blue-light-emitting BCNO phosphor. The method which selects raw materials comprising boric acid, melamine and hexamethylene tetramine comprises a step of obtaining a BCNO precursor in a water phase and a step of sintering the precursor in a muffle furnace without a protection atmosphere at a low temperature to prepare the BCNO phosphor. The quantum efficiency of the non-rare-earth doped blue-light-emitting BCNO phosphor prepared in the invention at an emitting peak of 456nm reaches 95%, and is greater than the highest quantum efficiency (79%) of blue-light-emitting BCNO phosphors reported at present; and compared with present rare-earth doped blue-light-emitting phosphors, the high-quantum-efficiency blue-light-emitting BCNO phosphor in the invention has a same efficiency, can avoid the use of rare earth elements having the disadvantages of high price and environmental pollution, can substitute present commercial blue-light-emitting phosphors, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and more specifically relates to a preparation method of high quantum efficiency blue light emitting BCNO (boron carbon nitrogen oxygen) fluorescent powder. Background technique [0002] Most of the current phosphor materials are based on rare earth elements (Eu 2+ 、Ce 3+ etc.) to emit light as an activator, which is not only expensive, but also pollutes the environment. BCNO is a non-REE-doped luminescent phosphor, which has attracted widespread attention because it does not require REEs as activators. BCNO phosphor has low preparation temperature (700~900°C), no need for protective atmosphere sintering (i.e. sintering in air), energy saving and environmental protection, wide excitation spectrum range (from ultraviolet to blue light), and adjustable emission spectrum (visible light range ), the fluorescence lifetime can be adjusted from nanoseconds to milliseconds, and many other...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B35/00C09K11/65
Inventor 张兴华卢遵铭闫硕唐成春孟凡斌徐学文林靖
Owner HEBEI UNIV OF TECH
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