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A kind of preparation method of copper-doped magnesium aluminate tunable light-emitting material

A luminescent material, magnesium aluminate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problem that the powder particle size is difficult to effectively control in the sol-gelation process, the wet gel is difficult to completely remove, and the raw materials are expensive. problem, to achieve the effect of thorough solvent drying, simple structure and uniform particle size

Active Publication Date: 2020-08-25
KUNMING UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, this method has the following disadvantages: raw materials are expensive, the preparation process is complicated, the sol-gel process and the particle size of the powder are difficult to effectively control, a large amount of organic matter or other metal salt anions (such as Cl - ) makes it difficult to completely remove the wet gel during the drying and calcination stages, etc.

Method used

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  • A kind of preparation method of copper-doped magnesium aluminate tunable light-emitting material
  • A kind of preparation method of copper-doped magnesium aluminate tunable light-emitting material
  • A kind of preparation method of copper-doped magnesium aluminate tunable light-emitting material

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Experimental program
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Effect test

Embodiment 1

[0027] Cu of this embodiment y Mg 1-y Al 2 O 4 ( y =0.1%) The preparation of ceramics includes the following steps:

[0028] (1) Press ( n Mg + n Cu ): n Al = 1:2 molar ratio weighed 2.5614g Mg(NO 3 ) 2 ·6H 2 O, 0.0024g Cu(NO 3 ) 2 ·3H 2 O and 7.5026g Al(NO 3 ) 3 ·9H 2 O, dissolve the three in 60ml absolute ethanol to obtain solution A; weigh C 2 H 2 O 4 ·2H 2 O dissolved in 40ml of absolute ethanol (C 2 H 2 O 4 ·2H 2 The molar ratio of O to total metal ions is 1.0), and add 0.6mL of dispersant (ethylene glycol), stir and mix uniformly to obtain No. B solution; Use an atomizer to atomize No. B solution and add it to No. A solution. Finished in 30 minutes, after mixing uniformly, get C solution; stir C solution at room temperature for 5 hours, then stir at 80°C for 2 hours, after evaporating ethanol, a light blue wet gel can be obtained. The wet gel is dried at 120°C A honeycomb-shaped small piece of fluffy dry gel, that is, the precursor, can be obtained overnight.

[0029] (2) ...

Embodiment 2

[0036] Cu of this embodiment y Mg 1-y Al 2 O 4 ( y =0.3%) The preparation of ceramics includes the following steps:

[0037] (1) Press ( n Mg + n Cu ): n Al = 1:2 molar ratio weighed 2.5563g Mg(NO 3 ) 2 ·6H 2 O, 0.0072g Cu(NO 3 ) 2 ·3H 2 O and 7.5026g Al(NO 3 ) 3 ·9H 2 O, dissolve the three in 60ml absolute ethanol to obtain solution A;

[0038] Weigh C 2 H 2 O 4 ·2H 2 O dissolved in 40ml of absolute ethanol (C 2 H 2 O 4 ·2H 2 The molar ratio of O to total metal ions is 1.0), and add 0.6mL of dispersant (ethylene glycol), stir and mix uniformly to obtain No. B solution; Use an atomizer to atomize No. B solution and add it to No. A solution. Finished in 30 minutes, after mixing uniformly, get C solution; Stir C solution at room temperature for 5 hours, then stir at 75°C for 1.5 hours, after evaporating ethanol, a light blue wet gel can be obtained. The wet gel is dried at 120°C Dry it overnight to obtain a honeycomb-shaped piece of fluffy dry gel, which is the precursor.

[0039] ...

Embodiment 3

[0042] Cu of this embodiment y Mg 1-y Al 2 O 4 ( y =0.5%) The preparation of ceramics includes the following steps:

[0043] (1) Press ( n Mg + n Cu ): n Al = 1:2 molar ratio weighed 2.5512g Mg(NO 3 ) 2 ·6H 2 O, 0.0121g Cu(NO 3 ) 2 ·3H 2 O and 7.5026g Al(NO 3 ) 3 ·9H 2 O, dissolve the three in 60ml absolute ethanol to obtain solution A; weigh C 2 H 2 O 4 ·2H 2 O dissolved in 40ml of absolute ethanol (C 2 H 2 O 4 ·2H 2 The molar ratio of O to total metal ions is 1.1, and 0.6mL of dispersant (ethylene glycol) is added, stirred and mixed uniformly to obtain No. B solution; Use an atomizer to atomize No. B solution and add it to No. A solution. 30 minutes to complete, after mixing uniformly, get C solution; stir C solution at room temperature for 6 hours, then stir at 80°C for 2 hours, after evaporating the ethanol, a light blue wet gel can be obtained, and the wet gel is dried at 120°C overnight You can get honeycomb-shaped small pieces of fluffy dry gel, that is, the precursor.

...

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Abstract

The invention discloses a preparation method of a copper-doped magnesium aluminate tuanable luminescent material and belongs to the technical field of preparation of luminescent materials. Wet gel is prepared from Mg(NO3)2.6H2O, Cu(NO3)2.3H2O, Al(NO3)3.9H2O and C2H2O4.2H2O by an improved sol-gel preparation process and sol-gel micro-area complexing method, and the wet gel is subjected to drying, calcining, ball mill, blank making, formation and high-temperature sintering to prepare a spinel type copper-doped magnesium aluminate tuanable luminescent material. In the copper-doped magnesium aluminate tuanable luminescent material prepared by the method provided by the invention, the 470-nm (blue light area) and 720-nm (red light area) emission peak intensity can be adjusted through the doping amount of copper under the excitation condition of ultraviolet light (280 nm); the intrinsic magnesium aluminate mainly emits light in the red light area, but the copper-doped magnesium aluminate can properly enhance 470-nm emission peak intensity and weaken 720-nm emission peak intensity, so that the two kinds of peak intensity are close to each other, and tuning of the blue light and the red light is realized. Therefore, the spinel type copper-doped magnesium aluminate tuanable luminescent material is a novel potential material for preparing visible light band tunable solid laser devices.

Description

Technical field [0001] The invention relates to a copper-doped magnesium aluminate tunable luminescent material and an improved preparation method thereof, and belongs to the technical field of luminescent material preparation. Background technique [0002] Magnesium aluminate ceramics have good physical and chemical properties, such as good chemical stability, wear resistance, corrosion resistance, low thermal expansion coefficient, good insulation properties, and good mechanical properties, thermal vibration stability and slag resistance. Performance etc. It can be used in refractory materials, optical materials, catalysts and humidity sensors. [0003] Among the preparation methods of magnesium aluminate ceramics, the sol-gel method is a relatively common preparation method. The traditional sol-gel method is a method in which organic or inorganic compounds are prepared through process procedures such as solution, sol, gel, drying, and heat treatment to prepare magnesium alumin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64C04B35/443C04B35/624
CPCC04B35/443C04B35/624C04B2235/3281C04B2235/9646C09K11/64
Inventor 谭红琳刘伟陈志斌罗天纵
Owner KUNMING UNIV OF SCI & TECH