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A kind of silicate activated by divalent europium ion and divalent manganese ion and its preparation method and application

A technology of divalent manganese ions and europium ions, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., to achieve the effects of sensitive temperature response, cheap and easy-to-obtain raw materials, and simple preparation methods

Active Publication Date: 2022-05-06
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects and deficiencies that the existing optical anti-counterfeiting materials cannot achieve rapid color changes at different temperatures while maintaining strong luminous brightness, and provide a Silicate activated by valence manganese ions. The present invention uses divalent europium ions and divalent manganese ions as activators. By regulating the content of dopant ions, the multi-color material with different colors as the temperature changes is realized. Anti-counterfeiting, while maintaining strong luminous brightness under high temperature conditions

Method used

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  • A kind of silicate activated by divalent europium ion and divalent manganese ion and its preparation method and application
  • A kind of silicate activated by divalent europium ion and divalent manganese ion and its preparation method and application
  • A kind of silicate activated by divalent europium ion and divalent manganese ion and its preparation method and application

Examples

Experimental program
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Embodiment 1

[0050] A silicate activated by divalent europium ions and divalent manganese ions, its chemical formula is: Ca 0.899 Eu 0.001 mn 0.1 MgSi 2 o 6 .

[0051] above Ca 0.899 Eu 0.001 mn 0.1 MgSi 2 o 6 A preparation method comprising the steps of:

[0052] Weigh calcium carbonate (CaCO 3 )0.1800g, basic magnesium carbonate (Mg(OH) 2 4MgCO 3 ) 0.2015g, silicon dioxide (SiO 2 )0.2403g, europium oxide (Eu 2 o 3 ) 0.0004g, manganese carbonate (MnCO 3 ) 0.0230g in an agate mortar, add 5mL of absolute ethanol, grind for 20min, mix evenly, put it into a corundum crucible, and put it in a box furnace, and gradually increase the temperature from 5°C / min to 1150°C, Then heat preservation, roasting in a hot carbon reducing atmosphere, the roasting process from temperature rise to heat preservation takes 6 hours, then the sample is naturally cooled and annealed to room temperature in the furnace, and the sample is taken out and ground to obtain the product.

Embodiment 2

[0054] A silicate activated by divalent europium ions and divalent manganese ions, its chemical formula is: Ca 0.897 Eu 0.003 mn 0.1 MgSi 2 o 6 .

[0055] above Ca 0.897 Eu 0.003 mn 0.1 MgSi 2 o 6 The preparation method is the same as in Example 1, the difference is that calcium carbonate (CaCO 3 ) addition amount is replaced by 0.1796g, europium oxide (Eu 2 o 3 ) is replaced by 0.0010g.

Embodiment 3

[0057] A silicate activated by divalent europium ions and divalent manganese ions, its chemical formula is: Ca 0.895 Eu 0.005 mn 0.1 MgSi 2 o 6 .

[0058] above Ca 0.895 Eu 0.005 mn 0.1 MgSi 2 o 6 The preparation method is the same as in Example 1, the difference is that calcium carbonate (CaCO 3 ) addition amount is replaced by 0.1792g, europium oxide (Eu 2 o 3 ) addition amount is replaced by 0.0018g.

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Abstract

The invention discloses a silicate activated by divalent europium ions and divalent manganese ions and its preparation method and application, wherein the chemical formula of the silicate is: Ca 1‑x‑y Eu x mn y MgSi 2 o 6 ,0

Description

technical field [0001] The invention relates to the technical field of optical anti-counterfeiting materials, more specifically, to a silicate activated by divalent europium ions and divalent manganese ions and its preparation method and application. Background technique [0002] Counterfeiting is a global problem, which poses a serious threat to production and consumption. The development of new anti-counterfeiting technology is of great significance for protecting genuine products and encrypting confidential documents. Most of the optical anti-counterfeiting materials have temperature-dependent luminescence characteristics, such as the relative intensity of luminescence of materials, CIE chromaticity coordinates, etc., will change with temperature, which can be directly presented through the emission spectrum. [0003] Alkaline earth silicate has excellent chemical stability and is not easy to absorb moisture. It can exist stably in the air for a long time and is often use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/59C01B33/20
CPCC09K11/7734C01B33/20C01P2006/60
Inventor 梁宏斌苏芳马凤凯周容富欧奕意杨蕴琳
Owner SUN YAT SEN UNIV
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