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BaMgSiO4: Yb, Tb up-conversion luminous anti-counterfeiting ceramic material and preparation method and application thereof

A technology of ceramic materials and conversion of luminescence, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of slow response time of discoloration, single discoloration and bleaching means, etc., and achieve good reversibility, obvious discoloration effect and wide application value.

Active Publication Date: 2019-07-30
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of inorganic color-changing materials, there have been many studies on the use of external fields such as electric fields, magnetic fields, heating, etc. to achieve material color change or bleaching, but there are still problems such as slow response time of color change, single color change or bleaching methods, etc.

Method used

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  • BaMgSiO4: Yb, Tb up-conversion luminous anti-counterfeiting ceramic material and preparation method and application thereof
  • BaMgSiO4: Yb, Tb up-conversion luminous anti-counterfeiting ceramic material and preparation method and application thereof
  • BaMgSiO4: Yb, Tb up-conversion luminous anti-counterfeiting ceramic material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, the BaMgSiO 4 : Yb, Tb up-conversion luminescent anti-counterfeiting ceramic material, the chemical composition formula is BaMgSiO 4 :x%Yb, y%Tb, where x=1, y=1.

[0020] The BaMgSiO 4 : Yb, the preparation method of Tb up-conversion luminescent anti-counterfeiting ceramic material, its specific steps are as follows:

[0021] Step 1, first BaCO 3 , Tb 4 o 7 , Yb 2 o 3 , MgO and SiO 2 According to the molar ratio of 1:0.0025:0.005:1:1, mix and grind evenly to obtain the mixed material, and press the mixed material into a disc;

[0022] Step 2, under reducing atmosphere condition (H 2 and N 2 The volume ratio of the gas is 1:19, the gas flow rate is 50 mL / min), the wafer obtained in step 1 is kept at a temperature of 1300 ° C for 5 h, and after cooling to room temperature, BaMgSiO 4 : Yb, Tb up-conversion luminescent anti-counterfeiting ceramic material ceramic sheet.

[0023] The BaMgSiO 4 : 1%Yb, 1%Tb up-conversion luminescent an...

Embodiment 2

[0027] The BaMgSiO 4 : Yb, Tb up-conversion luminescent anti-counterfeiting ceramic material, the chemical composition formula is BaMgSiO 4 :x%Yb, y%Tb, where x=0.01, y=0.01.

[0028] The BaMgSiO 4 : Yb, the preparation method of Tb up-conversion luminescent anti-counterfeiting ceramic material, its specific steps are as follows:

[0029] Step 1, first BaCO 3 , Tb 4 o 7 , Yb 2 o 3 , MgO and SiO 2 According to the molar ratio of 1:0.000025:0.00005:1:1, mix and grind evenly to obtain the mixed material, and press the mixed material into a disc;

[0030] Step 2, under reducing atmosphere condition (H 2 and N 2 The volume ratio of the gas is 1:19, the gas flow rate is 50 mL / min), the disc obtained in step 1 is kept at a temperature of 1000 ℃ for 10 h, and after cooling to room temperature, BaMgSiO 4 : Yb, Tb up-conversion luminescent anti-counterfeiting ceramic material ceramic sheet.

[0031] The above BaMgSiO 4 : BaMgSiO prepared by Yb, Tb up-conversion luminescent an...

Embodiment 3

[0033] The BaMgSiO 4 : Yb, Tb up-conversion luminescent anti-counterfeiting ceramic material, the chemical composition formula is BaMgSiO 4 :x%Yb, y%Tb, where x=2, y=2.

[0034] The BaMgSiO 4 : Yb, the preparation method of Tb up-conversion luminescent anti-counterfeiting ceramic material, its specific steps are as follows:

[0035] Step 1, first BaCO 3 , Tb 4 o 7 , Yb 2 o 3 , MgO and SiO 2 According to the molar ratio of 1:0.005:0.01:1:1, mix and grind evenly to obtain the mixed material, and press the mixed material into a disc;

[0036] Step 2, under reducing atmosphere condition (H 2 and N 2 The volume ratio of the gas is 1:19, the gas flow rate is 50 mL / min), and the wafer obtained in step 1 is kept at a temperature of 1150 ℃ for 8 h, and after cooling to room temperature, BaMgSiO 4 : Yb, Tb up-conversion luminescent anti-counterfeiting ceramic material ceramic sheet.

[0037] The above BaMgSiO 4 : BaMgSiO prepared by Yb, Tb up-conversion luminescent anti-cou...

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Abstract

The invention relates to a BaMgSiO4: Yb, Tb up-conversion luminous anti-counterfeiting ceramic material, a preparation method and application thereof, and belongs to the technical field of photochromic anti-counterfeiting and identification. The material has a chemical composition formula of BaMgSiO4: x% Yb, y% Tb, wherein x is 0.01-2, and y is 0.01-2. The method comprises the following steps of:firstly, uniformly mixing and grinding BaCO3, Tb4O7, Yb2O3, MgO and SiO2 according to the molar ratio of the chemical composition formula to obtain a mixed material, and pressing the mixed material into a wafer; keeping the temperature of the obtained wafer at 1000-1300 DEG C for 5-10h under the condition of reducing atmosphere, and cooling to room temperature to obtain a BaMgSiO4: Yb, Tb up-conversion luminous anti-counterfeiting ceramic material ceramic sheet. The BaMgSiO4: Yb, Tb up-conversion luminous anti-counterfeiting ceramic material ceramic sheet can regulate the intensity of the up-conversion luminescence through a coloring and bleaching process and can be used at the field of anti-counterfeiting.

Description

technical field [0001] The present invention relates to a kind of BaMgSiO 4 The invention relates to a Yb, Tb up-conversion luminescent anti-counterfeit ceramic material, a preparation method and an application thereof, belonging to the technical field of photochromic anti-counterfeiting and identification. Background technique [0002] Photochromic materials are materials that undergo reversible changes in color under the stimulation of external electric fields, magnetic fields, heat and light. Based on the color change of the material, the electrical conductivity, absorption spectrum, refractive index, etc. of the material change accordingly. Therefore, photochromic materials have important applications in optical information storage, carbon paper, molecular switches, imaging, anti-counterfeiting marks, biosensing, logic gates, molecular wires, optical / electronic devices and other fields. Color-changing materials include organic color-changing materials, inorganic color-...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/20C09K11/59
CPCC04B35/50C04B35/20C09K11/7774C04B2235/3215C04B2235/442C04B2235/9646
Inventor 杨正文任友涛邱建备宋志国杨勇周大成
Owner KUNMING UNIV OF SCI & TECH
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