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Bismuth ion-doped wavelength-adjustable color-changing luminescent material and preparation method thereof

A technology of luminescent materials and color-changing materials, applied in the field of luminescent materials, can solve the problems of complex process, easy copying of information, high cost, etc., and achieve the effect of stable chemical and physical properties

Pending Publication Date: 2022-07-29
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, most of the existing technologies use watermarks, colored fibers, fluorescent ink printing, the shape of tiny marks and random distribution as anti-counterfeiting technologies. Compared with other preparation processes, the cost is high, the process is complicated, and the stored information is easily copied. , Luminescent anti-counterfeiting materials are attracting more and more people's attention due to their simple manufacturing process, high visibility, and adjustable colors.

Method used

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  • Bismuth ion-doped wavelength-adjustable color-changing luminescent material and preparation method thereof
  • Bismuth ion-doped wavelength-adjustable color-changing luminescent material and preparation method thereof
  • Bismuth ion-doped wavelength-adjustable color-changing luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Synthesis:

[0032] 1) Weigh 0.2764g potassium carbonate (K 2 CO 3 ), 0.7894g barium carbonate (BaCO3 ), 0.4806g silicon dioxide (SiO 2 ), 0.4471g yttrium oxide (Y 2 O 3 ), 0.0093g bismuth oxide (Bi 2 O 3 ) into the agate mortar, add 5ml absolute ethanol (C 2 H 6 O) After grinding for 20min to dryness.

[0033] 2) Transfer the mixed powder obtained in step 1) into a corundum crucible and put it in a tube furnace, heat it up to 1100 ° C for calcination for 4 hours, and cool with the furnace to obtain a white solid product, namely KBaY 0.99 Si 2 O 7 :0.01Bi 3+ Luminescent material.

[0034] figure 1 is the KBaY obtained in Example 1 of the present invention 0.99 Si 2 O 7 :0.01Bi 3+ XRD pattern of figure 1 It can be seen that the KBaY obtained in Example 1 0.99 Si 2 O 7 :0.01Bi 3+ The XRD results are consistent with the standard diffraction peaks, and the intensity of the diffraction peaks is high.

[0035] figure 2 is the KBaY obtained in Example ...

Embodiment 2

[0038] Synthesis:

[0039] 1) Weigh 0.2764g potassium carbonate (K 2 CO 3 ), 0.7894g barium carbonate (BaCO 3 ), 0.4806g silicon dioxide (SiO 2 ), 0.4381g yttrium oxide (Y 2 O 3 ), 0.028g bismuth oxide (Bi 2 O 3 ) into the agate mortar, add 4 ml of absolute ethanol (C 2 H 6 O) After grinding for 30min to dryness.

[0040] 2) Transfer the mixed powder obtained in step 1) into a corundum crucible and put it in a tube furnace, heat it up to 1200 ° C for calcination for 3 hours, and cool with the furnace to obtain a white solid product, namely KBaY 0.97 Si 2 O 7 :0.03Bi 3+ Luminescent material.

[0041] Figure 4 is the KBaY obtained in Example 2 of the present invention 0.97 Si 2 O 7 :0.03Bi 3+ XRD pattern of Figure 4 It can be seen that the KBaY obtained in Example 2 0.97 Si 2 O 7 :0.03Bi 3+ XRD results with KBaYSi 2 O 7 Standard cards have good matching and good crystallinity.

[0042] Figure 5 is the KBaY obtained in Example 2 of the present invent...

Embodiment 3

[0045] Synthesis:

[0046] 1) Weigh 0.2764g potassium carbonate (K 2 CO 3 ), 0.7894g barium carbonate (BaCO 3 ), 0.4806g silicon dioxide (SiO 2 ), 0.4246g yttrium oxide (Y 2 O 3 ), 0.056g bismuth oxide (Bi 2 O 3 ) into the agate mortar, add 2ml absolute ethanol (C 2 H 6 O) After grinding for 40min to dryness.

[0047] 2) Transfer the mixed powder obtained in step 1) into a corundum crucible and put it in a tube furnace, heat it up to 1300 ° C for calcination for 1 hour, and cool with the furnace to obtain a white solid product, namely KBaY 0.94 Si 2 O 7 :0.06Bi 3+ Luminescent material.

[0048] Figure 7 is the KBaY obtained in Example 3 of the present invention 0.94 Si 2 O 7 :0.06Bi 3+ XRD pattern of Figure 7 It can be seen that the KBaY obtained in Example 3 0.94 Si 2 O 7 :0.06Bi 3+ The XRD results are consistent with the standard diffraction peaks, and the purity is high.

[0049] Figure 8 is the KBaY obtained in Example 3 of the present invention...

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Abstract

The invention relates to a Bi < 3 + >-doped wavelength-adjustable color-changing luminescent material and a preparation method thereof, the general formula of the material is KBaY < 1-x > Si2O7: xBi < 3 + >, 0 lt; x is less than or equal to 0.06. KBaYSi2O7 is adopted as a matrix, a good crystal field environment and a stable chemical structure are provided for a light-emitting center Bi < 3 + >, and the crystal structure of the light-emitting material belongs to a monoclinic structure of a P21 / n space group. The light-emitting range of Bi < 3 + > is 400-600 nm, and the light-emitting material can realize adjustable light emission from blue light to green light under the excitation of ultraviolet light with different wavelengths. The adjustable emission from blue to cyan can be realized by changing the excitation wavelength. The material is prepared by adopting a simple high-temperature solid-phase method, has the advantages of simple process, wide spectrum, high luminous intensity, environmental protection, safety, economy, high efficiency and the like, and can be produced in batches in practice.

Description

technical field [0001] The invention relates to a wavelength-tunable KBaY 1-x Si 2 O 7 :xBi 3+ A color-changing luminescent material and a preparation method thereof belong to the technical field of luminescent materials. Background technique [0002] Information security is one of the most serious problems in today's social life, which affects various fields such as society, economy, science and technology. The development of new anti-counterfeiting technologies makes it harder to replicate the authenticity of a product, which has important implications for protecting brands and confidential documents. Therefore, various reliable anti-counterfeiting and encryption methods, such as nuclear track technology, holographic images, magnetic materials and luminescent materials, are constantly being researched and innovated. Among them, watermarks, colored fibers, fluorescent ink printing, the shape and random distribution of tiny marks, etc. are mostly used as anti-counterfei...

Claims

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Application Information

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IPC IPC(8): C09K11/79C09K9/00G09F3/02
CPCC09K11/77062C09K9/00G09F3/0294
Inventor 张文涛杨朕瑞赵舟袁菲吴琪祺杜海英陈显飞
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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