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Red long-afterglow fluorescent material of alkaline earth titanate activated by Bi<2+> and preparation method thereof

A fluorescent material and titanate technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of low excitation efficiency of ultraviolet light, low afterglow intensity and time, and achieve high luminous brightness, long time and high excitation efficiency Effect

Inactive Publication Date: 2012-08-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of long afterglow fluorescent material based on Bi 2+ Alkaline earth titanate red long-lasting luminescent material with ions as red luminescence active ions and preparation method thereof

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) According to the molar ratio of Ca ion: Bi ion: Ti ion = 0.999: 0.001: 1, weigh CaCO 3 、 Bi 2 o 3 、TiO 2 , and mix the above materials evenly;

[0015] (2) Put the mixture obtained in step (1) into the crucible, and pass the reducing atmosphere H into the furnace 2 +N 2 , and then heated up to 1200°C, and then kept warm for 5 hours and then cooled with the furnace temperature, that is, the chemical composition formula is Ca 0.999 Bi 0.001 TiO 3 bismuth ion Bi 2+ Activated alkaline earth titanate red long afterglow fluorescent material.

Embodiment 2

[0017] (1) According to the molar ratio of Sr ion: Bi ion: Er ion: Ti ion = 0.98: 0.01: 0.01: 1, weigh SrCO 3 、 Bi 2 o 3 、Er 2 o 3 、TiO 2 , and mix the above materials evenly;

[0018] (2) Put the mixture obtained in step (1) into the crucible, and pass the reducing atmosphere H into the furnace 2 +N 2 , and then heated up to 1250 ° C, and then kept for 4 hours and then cooled with the furnace temperature, that is, the chemical composition formula is Sr 0.98 Bi 0.01 Er 0.01 TiO 3 bismuth ion Bi 2+ Activated alkaline earth titanate red long afterglow fluorescent material.

Embodiment 3

[0020] (1) According to the molar ratio of Ba ion: Bi ion: Nd ion: Ti ion = 0.85: 0.1: 0.05: 1, weigh BaO and Bi 2 o 3 、Nd 2 o 3 、TiO 2 , and mix the above materials evenly;

[0021] (2) Put the mixture obtained in step (1) into a crucible, put a reducing atmosphere CO into the furnace, then raise the temperature to 1300°C, keep it warm for 3 hours, and then cool with the furnace temperature, and the chemical composition formula is Ba 0.85 Bi 0.1 Nd 0.05 TiO 3 bismuth ion Bi 2+ Activated alkaline earth titanate red long afterglow fluorescent material.

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Abstract

The invention provides a red long-afterglow fluorescent material of alkaline earth titanate activated by Bi<2+> and a preparation method thereof. The red long-afterglow fluorescent material is prepared from the components in a chemical composition formula being M(1-x-y)BixRyTiO3. The preparation method comprises the steps of: weighing MO or MCO3, Bi2O3, oxide or carbonate of R and TiO2 according to the chemical composition, uniformly mixing the materials, feeding the obtained mixed materials into a crucible, introducing a reducing atmosphere or adding carbon powder into a hearth, heating, preserving heat and then cooling the materials along with a furnace so as to obtain the red long-afterglow fluorescent material of the alkaline earth titanate activated by Bi<2+> shown in the chemical composition formula. According to the red long-afterglow fluorescent material of the alkaline earth titanate activated by Bi<2+> provided by the invention, a red long afterglow fluorescent light with a broad band can be obtained under excitation of an ultraviolet light, and therefore, the material can be expected to be used as a novel red long-afterglow fluorescent material for application.

Description

technical field [0001] The invention relates to long afterglow fluorescent powder technology, in particular to a fluorescent powder material with red long afterglow luminescence under the excitation of ultraviolet light. Background technique [0002] Long afterglow material is a kind of luminescent material with high application value. The material can continue to emit light for a long time after being irradiated by sunlight, thus providing indication and marking functions in night vision or under no lighting conditions. Long afterglow materials in the visible band are mainly used to provide indications in the civilian field, while long afterglow materials in the near-infrared band have important application value in the field of military night vision. [0003] The long-lasting luminescence bands of the current long-lasting luminescent materials mainly include blue and green light bands, and rare earth ions are used as the main photoactive ions, such as Eu 2+ Activated str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67C09K11/78C09K11/80
Inventor 宋志国李臣邱建备杨正文周大成尹兆益杨勇赵宗彦余雪
Owner KUNMING UNIV OF SCI & TECH