Treatment method of silicon dioxide nanoparticles for blue-green fluorescent powder

A silicon dioxide and nanoparticle technology, applied in the fields of nanotechnology, chemical instruments and methods, and nanotechnology for materials and surface science, it can solve problems such as performance limitations and inability to make further breakthroughs, and achieve stable product performance and preparation. Less demanding timing requirements, the effect of increasing production

Pending Publication Date: 2021-03-16
XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

The light emission performance of phosphors can be well regulated by changing the doping concentration, the properties of precursors

Method used

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  • Treatment method of silicon dioxide nanoparticles for blue-green fluorescent powder
  • Treatment method of silicon dioxide nanoparticles for blue-green fluorescent powder
  • Treatment method of silicon dioxide nanoparticles for blue-green fluorescent powder

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016]Example 1: CA2SiO4: 0.05EU2+

[0017]Commercial CA2SiO4: EU2+The phosphor was placed at 700 ° C to calcine 2 h at 700 ° C for 2 h to obtain the blue green phosphor.

Example Embodiment

[0018]Example 2: 0.5 Sio2-CA2SiO4: 0.05EU2+

[0019]Method of treatment of silica nanoprams: The commercially available polyvinylpyrrolidone (PVP) and anhydrous ethanol were stirred at 200 rpm at room temperature at room temperature to obtain a mixed solution A. Then, the purity greater than 99.9% is added to the mixed solution A of 5 mol / L of ammonia and the concentration of 5 mol / L, and the mixed solution B is obtained, wherein tetraethyl n-ethyl silicate occupies the mass of mixed solution. %. The mixed solution B was placed at 200 ° C for calcination, calcined for 2 h, and the powder particles were obtained. The particles were ground, i.e., the obtained silica nanoparticles were obtained.

[0020]Preparation of phosphors: First, the treated silica particles and CA2SiO4: EU2+According to 0.5 according to the mass ratio, it was placed at 700 ° C for 2 h at 700 ° C for 2 h to obtain the blue-green phosphor. The luminous intensity of the pure phosphor is 1, and the luminescence intens...

Example Embodiment

[0021]Example 3: 3SIO2-CA2SiO4: 0.05EU2+

[0022]Method of treatment of silica nanoparticles: The commercially available polyvinylpyrrolidone (PVP) and anhydrous ethanol were stirred at a volume ratio of 0.5 at room temperature at room temperature for 1 h, resulting in a mixed solution A. Then, the purity of 99.9% of the orthodoxate (TEOS) was added to the mixed solution A to the mixed solution A, where the mixed solution B was obtained, where the mixed solution B was obtained. 20%. The mixed solution B was placed at 100 ° C for calcination, calcined for 4 h, and the powder particles were obtained. The particles were ground, i.e., the obtained silica nanoparticles were obtained.

[0023]Preparation of phosphors: First, the treated silica particles and CA2SiO4: EU2+The mass ratio was 3 mixed, and the blue-green phosphor was calcined at 500 ° C in acetone. The luminous intensity of the pure fluorescent powder is provided, and the luminescence intensity of the present embodiment is 1.25.

[002...

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Abstract

The invention discloses a treatment method of silicon dioxide nanoparticles for blue-green fluorescent powder, and belongs to the technical field of preparation and application of nano powder. Nano-scale silicon dioxide particles are prepared by utilizing PVP through a solution combustion method, and then the nano-scale silicon dioxide particles are added into Ca2SiO4: Eu < 2 + > fluorescent powder through a solid-state reaction method. The prepared fluorescent powder has blue-green emission at 440-635 nm, and the emission intensity is improved by 25-32% compared with that of non-added treatednano silicon dioxide particles. The treatment method provided by the invention is simple in process, stable in product performance and suitable for industrial production.

Description

technical field [0001] The invention provides a treatment method for silica nanoparticles used in blue-green fluorescent powder, and belongs to the technical field of preparation and application of luminescent materials. Background technique [0002] White light-emitting diodes (w-LEDs) have attracted increasing attention due to their positive properties such as high brightness, high energy efficiency, miniaturization, fast response, long shelf life, and environmental protection (mercury-free). In lighting and backlighting, w-LEDs are widely used due to their high efficiency. InGaN-based blue LEDs with YAG:Ce 3+ (cerium-doped yttrium aluminum garnet), a yellow phosphor, is a typical strategy to generate white light. However, this approach results in poor CRI (color rendering index) and CCT (color color number) due to insufficient red content in their emission spectrum, and in addition, its poor thermal quenching performance. These drawbacks make w-LEDs unsuitable for resi...

Claims

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Application Information

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IPC IPC(8): C09K11/59B82Y20/00B82Y30/00
CPCC09K11/7734B82Y20/00B82Y30/00
Inventor 张乐甄方正邵岑陈东顺赵超邱凡张永丽李延彬
Owner XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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