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Optical anti-counterfeiting material and preparation method thereof

An optical anti-counterfeiting and raw material technology, applied in the field of optical anti-counterfeiting materials and their preparation, can solve the problems of difficult multi-mode fluorescent anti-counterfeiting technology, and achieve the effects of low cost, good stability and simple preparation method

Pending Publication Date: 2020-04-07
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to realize multi-mode fluorescent anti-counterfeiting technology in single-phase materials (Adv. Mater. 2018, 1804644)

Method used

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  • Optical anti-counterfeiting material and preparation method thereof
  • Optical anti-counterfeiting material and preparation method thereof
  • Optical anti-counterfeiting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation of the optical anti-counterfeiting material of this embodiment comprises the following steps:

[0032] 1. Preparation of Sr 1.995 Er 0.005 SnO 4 Material: SrCO with a purity of 99.5% 3 , 99.9% SnO 2 , 99.9% Er 2 o 3 As raw material, according to Sr 1.995 Er 0.005 SnO 4 The metering ratio is weighed, put into a ball mill tank and mixed for ball milling, ball milling conditions: the volume ratio of the volume of raw materials, agate ball volume, and ball milling medium absolute ethanol is equal to 1:1:1.5, and it is ball milled for 12 hours, and the raw materials after ball milling are placed Bake in an oven at 80°C for 4 hours. Afterwards, use a tablet machine to press the dried raw materials into raw material embryos with a diameter of 40mm, and then put the pressed green embryos into a KSL-1700X box furnace for pre-calcination. The pre-calcination condition is 800°C After 1 hour, crush the pre-fired block sample, grind it into a powder, sieve ...

Embodiment 2

[0040] Basically the same as Embodiment 1, the difference is that step 3 of this embodiment is:

[0041] The prepared Sr 1.995 Er 0.005 SnO 4 Material and Ca 1.999 PR 0.001 Nb 2 o 7 The materials are crushed, then weighed and mixed according to the mass ratio of 1:1 to obtain the raw materials, and then the raw materials are put into a ball mill tank and mixed for ball milling. Ball milling conditions: the volume of raw materials, the volume of agate balls, and the volume ratio of absolute ethanol as the ball milling medium Equal to 1:1:1.5, ball mill it for 12 hours, put the raw material after ball milling into an oven and bake at 80°C for 4 hours to get mixed solid powder; mix the mixed solid powder and polydimethylsiloxane solution according to the ratio of 4:6 The mass ratio is mixed to obtain a mixture solution, and then the mixture solution is cast on a glass substrate by a tape casting machine, and finally cured at 80°C to form a film, and finally a composite flex...

Embodiment 3

[0044] Basically the same as Embodiment 1, the difference is that step 3 of this embodiment is:

[0045] The prepared Sr 1.995 Er 0.005 SnO 4 Material and Ca 1.999 PR 0.001 Nb 2 o 7 The materials are crushed, then weighed and mixed according to the mass ratio of 1:1 to obtain the raw materials, and then the raw materials are put into a ball mill tank and mixed for ball milling. Ball milling conditions: the volume of raw materials, the volume of agate balls, and the volume ratio of absolute ethanol as the ball milling medium Equal to 1:1:1.5, ball mill it for 12 hours, put the raw material after ball milling into an oven and bake at 80°C for 4 hours to obtain mixed solid powder; mix the mixed solid powder and polydimethylsiloxane solution according to the ratio of 2:8 The mass ratio is mixed to obtain a mixture solution, and then the mixture solution is cast onto a glass substrate by a tape casting machine, and finally cured at 80°C to form a film, and finally a composite f...

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Abstract

The invention relates to an optical anti-counterfeiting material which is characterized by comprising two fluorescent ceramic materials with chemical formulas of Sr1.995Er0.005SnO4 and Ca1.999Pr0.001Nb2O7, wherein the mass ratio of the Sr1.995Er0.005SnO4 material to the Ca1.999Pr0.001Nb2O7 material is(1: 2)-(2: 1). The invention also discloses a preparation method of the optical anti-counterfeiting material. Compared with the prior art, multi-mode anti-counterfeiting can be achieved, and then the anti-counterfeiting technology is improved.

Description

technical field [0001] The invention belongs to the technical field of anti-counterfeiting materials, and in particular relates to an optical anti-counterfeiting material and a preparation method thereof. Background technique [0002] Photochromic materials refer to a class of materials that can change color after being irradiated by a light source, mainly including inorganic photochromic materials and organic photochromic materials. The color center of the material changes, thereby changing the color of the material. Using the principle of photochromism, photochromic materials are widely used in optical storage and optical anti-counterfeiting. Existing photochromic materials can refer to the invention patent application with application number CN201710142424.5 "A Stannate Reversible Photochromic Material with a Perovskite Structure and Its Preparation Method" (application publication number is CN106916579A), application number For the invention patent application of CN201...

Claims

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Application Information

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IPC IPC(8): C09K9/00G09F3/02
CPCC09K9/00G09F3/0294
Inventor 杨玉成罗来慧罗锦辉朱渊
Owner NINGBO UNIV
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