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Single-base multi-photochromic long afterglow phosphorescence body and its preparation method

A phosphor, multi-color technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problem of not yet finding a luminescent material matrix, etc.

Inactive Publication Date: 2004-03-03
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, people have not found a luminescent material matrix that can emit light in different full color ranges

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh analytically pure cadmium carbonate (CdSiO 3 ) 17.21g, spectrally pure silica (SiO 2 )6.0g, cerium oxide (CeO 2 ) 0.207g, fully ground and mixed in an agate mortar, compacted in a corundum crucible, tightly closed the mouth of the crucible with a flat crucible lid, placed in a high-temperature furnace, heated to 1050°C, and kept at a constant temperature for 3 hours. Remove from heat and cool to room temperature. The product is a white powder. Through XRD identification, the product is cadmium metasilicate (CdSiO 3 ), the emission spectrum includes a broadband from 300 to 450nm and a trivalent Ce at ~580nm 3+ The emission belt composition. After being irradiated with 254nm ultraviolet light, the phosphor exhibits strong light orange long afterglow luminescence.

Embodiment 2

[0018] Weigh analytically pure cadmium carbonate (CdSiO 3 ) 17.21g, spectrally pure silica (SiO 2 ) 6.0g, praseodymium oxide (Pr 6 o 11 ) 0.825g, fully ground and mixed in an agate mortar, compacted in a corundum crucible, tightly closed the mouth of the crucible with a flat crucible lid, placed in a high-temperature furnace, heated to 1050°C, and kept at a constant temperature for 3 hours. Remove from heat and cool to room temperature. The product is a white powder. Through XRD identification, the product is cadmium metasilicate (CdSiO 3 ), the emission spectrum includes a broadband from 300 to 450nm and a trivalent Pr at 611nm 3+ composition of emission peaks. After being irradiated with 254nm ultraviolet light, the phosphor exhibits strong pink long afterglow luminescence.

Embodiment 3

[0020] Weigh analytically pure cadmium carbonate (CdSiO 3 ) 17.21g, spectrally pure silica (SiO 2 )6.0g, samarium oxide (Sm 2 o 3 ) 1.744g, fully ground and mixed in an agate mortar, compacted in a corundum crucible, tightly closed the mouth of the crucible with a flat crucible lid, placed in a high-temperature furnace, heated to 950°C, and kept at a constant temperature for 6 hours. Remove from heat and cool to room temperature. The product is a white powder. Through XRD identification, the product is cadmium metasilicate (CdSiO 3 ), the emission spectrum includes a broadband from 300 to 450nm and two characteristic emission peaks at 570 and 602nm of trivalent Sm ions, respectively. After being irradiated with 254nm ultraviolet light, the phosphor exhibits strong pink long afterglow luminescence.

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Abstract

A single-matrix multi-color long-afterglow phosphorescent body has the formula: CdSiO2:Re3t, where CdSiO3 is matrix and Re3+ is activating RE ion. It is prepared through proportional mixing, calcining in covered corundum crucible, and cooling in air.

Description

technical field [0001] The invention relates to a long afterglow phosphor, in particular to a matrix polychromatic long afterglow phosphor activated by trivalent rare earth ions. [0002] The present invention also relates to a method for preparing the above-mentioned phosphor. Background technique [0003] Long afterglow material is an energy-saving low-light lighting and display material. After it is irradiated by sunlight or ultraviolet light, it can store light energy in the trap of the material itself, and then slowly release the energy to the rare earth activated ions in the material to emit light. Long afterglow materials can be widely used in low-light lighting, energy-saving materials, emergency indicating equipment, handicrafts and decorative materials, etc. From the perspective of practical application, it is hoped that long-lasting luminescent materials with different light colors or even all color ranges can be obtained. According to the principle of three pr...

Claims

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Application Information

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IPC IPC(8): C09K11/79
Inventor 刘应亮雷炳富叶泽人张静娴石春山易守军
Owner JINAN UNIVERSITY