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Silicate phosphor and preparation method and application thereof

A phosphor and silicate technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of poor product particle size uniformity and morphology, surface damage of phosphor particles, and strict requirements for reaction atmosphere, etc. The effect of crystal structure, crystal quality improvement, and emission intensity improvement

Active Publication Date: 2017-01-04
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The preparation of silicate phosphor generally adopts high-temperature solid-state reaction method. This method has great disadvantages, such as high synthesis temperature, slow reaction speed, low reaction uniformity, and strict requirements on the reaction atmosphere; the uniformity of product particle size and Poor shape, low luminous efficiency and other disadvantages
Moreover, due to the high firing temperature, phosphor powder sintering is easy to occur, and the aggregation of phosphor powder must be reduced by ball milling and other methods, but this will easily lead to damage on the surface of phosphor powder particles, which will greatly reduce the performance of phosphor powder.

Method used

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  • Silicate phosphor and preparation method and application thereof
  • Silicate phosphor and preparation method and application thereof
  • Silicate phosphor and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Selected raw materials: Li 2 CO 3 (A·R), SrCO 3 (A·R), Eu 2 o 3 (A·R), Ag nano, tetraethyl orthosilicate (TEOS), HNO 3 (A R), absolute ethanol (A R), its composition and content according to the chemical formula Li 2 Sr 1-x-y SiO 4 :xEu 2+ , yRE 3+ A configuration was performed with x=0.5 mol%, y=0 mol%. Its process steps are:

[0045] (1) configure metal ion solution, according to stoichiometry, weigh the mass to get 1 / 75 of the formula molar mass, and the formula molar mass is 1molLi 2 m 1-x-y SiO 4 When taking x=0.5mol%, y=0mol%, then weigh Li respectively 2 CO 3 =1.0345g, SrCO 3 =1.9586g, (C 2 h 5 O) 4 Si=2.7788g, Eu 2 o 3 =0.0117g raw material, dissolve SrCO with 3-4ml nitric acid with a concentration of 65%~68% 3 , to obtain metal ion solution A.

[0046] (2) Mix concentrated nitric acid with a certain amount of deionized water to form dilute nitric acid with a concentration of (1-2) mol / L; dissolve Eu with dilute nitric acid 2 o 3 、Sm 2 o...

Embodiment 2

[0054] Selected raw materials: Li 2 CO 3 (A·R), SrCO 3 (A·R), Eu 2 o 3 (A·R), Sm 2 o 3 , Ag nano, tetraethyl orthosilicate (TEOS), HNO 3 (A R), absolute ethanol (A R), its composition and content according to the chemical formula Li 2 Sr 1-x-y SiO 4 :xEu 2+ ,yRE 3 + , RE 3+ =Sm to configure, x=0.4mol%, y=0.1mol%. Its process steps are:

[0055] (1) configure metal ion solution, according to stoichiometry, weigh the mass to get 1 / 75 of the formula molar mass, and the formula molar mass is 1molLi 2 m 1-x-y SiO 4 When taking x=0.4mol%, y=0.1mol%, then weigh Li respectively 2 CO 3 =1.0345g, SrCO 3 =1.9586g, (C 2 h 5 O) 4 Si=2.7788g, Eu 2 o 3 =0.0094g, Sm 2 o 3 =0.0023g raw material, dissolve SrCO with 3-4ml nitric acid with a concentration of 65%~68% 3 , to obtain metal ion solution A.

[0056] (2) Mix concentrated nitric acid with a certain amount of deionized water to form dilute nitric acid with a concentration of (1-2) mol / L; dissolve Eu with dilute...

Embodiment 3

[0064] Selected raw materials: Li 2 CO 3 (A·R), SrCO 3 (A·R), Eu 2 o 3 (A·R), Gd 2 o 3 , Ag nano, tetraethyl orthosilicate (TEOS), HNO 3 (A R), absolute ethanol (A R), its composition and content according to the chemical formula Li 2 Sr 1-x-y SiO 4 :xEu 2+ , yRE 3 + , RE 3+ =Gd for configuration, x=0.6 mol%, y=0.2 mol%. Its process steps are:

[0065] (1) configure metal ion solution, according to stoichiometry, weigh the mass to get 1 / 75 of the formula molar mass, and the formula molar mass is 1molLi 2 m 1-x-y SiO 4 When taking x=0.6mol%, y=0.2mol%, then weigh Li respectively 2 CO 3 =1.0345g, SrCO 3 =1.9527g, (C 2 h 5 O) 4 Si=2.7788g, Eu 2 o 3 =0.0141g, Gd 2 o 3 =0.0048g raw material, dissolve SrCO with 3-4ml nitric acid with a concentration of 65%~68% 3 , to obtain metal ion solution A.

[0066] (2) Mix concentrated nitric acid with a certain amount of deionized water to form dilute nitric acid with a concentration of (1-2) mol / L; dissolve Eu wit...

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Abstract

The invention discloses a silicate phosphor and a preparation method and application thereof. By adjusting formula composition, selecting raw materials and adding rare earth Sm<3+> or Bi3<+> or Gd3<+> into an activator with a rare earth activator Eu2<+> being a main ingredient, the emission strength of a fluorescent material is improved through the energy transmission effect between Sm<3+> or Gd3<+> or Bi3<+> and Eu3<+>; secondly, in the process of generating a precursor, Ag nano-particles are added, fluorescence enhancement is realized according to the Ag nanometer fluorescence enhancement principle, and therefore the prepared phosphor is higher in luminescent property.

Description

technical field [0001] The invention belongs to the technical field of rare earth luminescent materials, and specifically relates to a silicate phosphor and its preparation method and application. Preparation method of yellow fluorescent powder of matrix material. Background technique [0002] Light-emitting diodes (white LEDs) have been widely used in lighting and display because of their advantages such as low energy consumption, good color reproduction, environmental protection and long life. The development of three primary colors (red, green, blue) white LED lighting technology in the near ultraviolet band is the focus of current research in the field of semiconductor lighting, in which phosphor is the key material for manufacturing white LEDs. [0003] Silicate phosphors have various systems, rich sources of raw materials, and simple preparation methods. They are one of the important optional matrix materials for phosphors used in LEDs. At present, it has been widely...

Claims

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Application Information

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IPC IPC(8): C09K11/59
CPCC09K11/7734C09K11/7792
Inventor 关荣锋张金鹏池宪虎邵荣王家亮陈尚千赵源李宇
Owner YANCHENG INST OF TECH
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