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Orange long afterglow phosphors in strontium stannate composite oxide system and preparation method thereof

A composite oxide, long afterglow luminescence technology, used in luminescent materials, chemical instruments and methods, etc., can solve problems such as unreported, and achieve wide application prospects, good performance, and easy grinding.

Inactive Publication Date: 2010-08-18
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, for rare earth ions Sm 3+ The study of activated strontium stannate composite oxide system long-lasting luminescent materials has not been reported yet

Method used

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  • Orange long afterglow phosphors in strontium stannate composite oxide system and preparation method thereof
  • Orange long afterglow phosphors in strontium stannate composite oxide system and preparation method thereof
  • Orange long afterglow phosphors in strontium stannate composite oxide system and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Get A=2, B=1, x=0.001, according to the expression A(Sr 1-x O)·B(SnO 2 ):xSm 3+ The stoichiometric ratio of each substance in the formula was weighed respectively as strontium carbonate (SrCO 3 , analytically pure), tin dioxide (SnO 2 , analytically pure) and samarium oxide (Sm 2 o 3 , >99.999%), put it into a corundum crucible after fully grinding, heat to 1400 ° C, keep the temperature for 4 hours, the sample is naturally cooled with the furnace, and the final product long afterglow luminescent material can be obtained after grinding. The luminescent material emits obvious orange luminescence under the excitation of the ultraviolet lamp, and after the irradiation is stopped, an orange long afterglow luminescence can be observed, and the long afterglow luminescence time is about 30 minutes. Identified by XRD, the product is Sr 2 SnO 4 Pure phase (all XRD peaks correspond well to standard card 89-0374), figure 1 Shown is the XRD spectrum of the obtained long-las...

Embodiment 2

[0028] Get A=2, B=1, x=0.003, according to expression A(Sr 1-x O)·B(SnO 2 ):xSm 3+ The stoichiometric ratio of each substance in the formula was weighed respectively as strontium carbonate (SrCO 3 , analytically pure), tin dioxide (SnO 2 , analytically pure) and samarium oxide (Sm 2 o 3 , >99.999%), put it into a corundum crucible after fully grinding, heat to 1400 ° C, keep the temperature for 4 hours, the sample is naturally cooled with the furnace, and the final product long afterglow luminescent material can be obtained after grinding. The luminescent material emits obvious orange luminescence under the excitation of the ultraviolet lamp, and after the irradiation is stopped, orange long afterglow luminescence can be observed, and the long afterglow luminescence time exceeds 1 hour. Identified by XRD, the product is Sr 2 SnO 4 pure phase.

[0029] The luminescent material emits bright orange luminescence under the excitation of ultraviolet light, which is derived f...

Embodiment 3

[0031] Get A=2, B=1, x=0.01, according to expression A(Sr 1-x O)·B(SnO 2 ):xSm 3+ The stoichiometric ratio of each substance in the formula was weighed respectively as strontium carbonate (SrCO 3 , analytically pure), tin dioxide (SnO 2 , analytically pure) and samarium oxide (Sm 2 o 3 , >99.999%), put it into a corundum crucible after fully grinding, heat to 1400 ° C, keep the temperature for 5 hours, the sample is naturally cooled with the furnace, and the final product long afterglow luminescent material can be obtained after grinding. The luminescent material emits obvious orange luminescence under the excitation of the ultraviolet lamp, and after the irradiation is stopped, an orange long afterglow luminescence can be observed, and the long afterglow luminescence time is about 20 minutes. Identified by XRD, the product is Sr 2 SnO 4 pure phase. A high doping concentration changes the distribution and concentration of traps for the presence of external excitation l...

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Abstract

The invention discloses orange long afterglow phosphors in a strontium stannate composite oxide system. The composition of the phosphors is based on the following expression: A (Sr1-xO).B(SnO2):xSm3+, wherein when A is 2, B is 1 and x ranges from 0.0005 to 0.01; and when A is 3, B is 2 and x ranges from 0.0005 to 0.01. A preparation method comprises the following steps: mixing and grinding strontium carbonate, stannic oxide and samarium oxide, in the air atmosphere, carrying out sintering at 1400-1500 DEG C, cooling and grinding, thus obtaining the long afterglow phosphors. The preparation method is simple, and the prepared long afterglow phosphors have good performance, have afterglow time at least lasting more than one hour in the darkness, have low production cost and stable chemical property, are fluffy, quite easy to grind and non-radioactive, and can not do harm to the environment. The contents of the invention have wide application prospects and enormous industrialization potential.

Description

technical field [0001] The invention belongs to the field of long afterglow luminescent materials, in particular to a trivalent rare earth ion samarium (Sm 3+ ) activated novel strontium stannate composite oxide orange light emitting long afterglow luminescent material and a preparation method thereof. Background technique [0002] Long afterglow luminescent materials refer to materials that can continue to emit light for a period of time after being irradiated by light sources such as visible light and ultraviolet light for a short time, and then turn off the light source. Compared with other colors, the luminous brightness and afterglow time of long-wave red or orange luminescent materials are far from meeting the needs of practical applications. It can be expected that if a red or orange long-lasting luminescent material with excellent performance can be developed that can match the existing green and blue long-lasting luminescent materials, according to the principle of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66
Inventor 雷炳富刘应亮满石清
Owner JINAN UNIVERSITY
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