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Fluorescent material and preparation method of various titanate germanates for white light LED

A fluorescent material, titanium germanium technology, applied in the field of fluorescent material science, can solve problems such as the inability to meet the needs of crop lighting, and achieve the effects of simple preparation method, easy availability of raw materials, and accelerated growth and development

Active Publication Date: 2021-06-18
YANBIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the development of modern agriculture, traditional light sources are limited by conditions such as light-emitting mechanisms, which can no longer meet the needs of crop lighting

Method used

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  • Fluorescent material and preparation method of various titanate germanates for white light LED
  • Fluorescent material and preparation method of various titanate germanates for white light LED
  • Fluorescent material and preparation method of various titanate germanates for white light LED

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Raw material Ca 2 CO 3 , La 2 o 3 、TiO 2 、GeO 2 、Eu 2 o 3 Press Ca 0.8 La 0.133 Ti 0.9 Ge 0.1 o 3 : 0.01Eu stoichiometric ratio was weighed and uniformly mixed in a mortar for 30 minutes, and the obtained fraction was packed into a corundum crucible with a cover and then put into a calciner for calcination, respectively at 825°C (CaCO 3 melting point), 1115°C (GeO 2 melting point) and calcined for 10 minutes at 1300°C for 2 hours. After cooling, finely ground to obtain Ca 0.8 La 0.133 Ti 0.9 Ge 0.1 o 3 : 0.01Eu fluorescent material. see test results figure 1 .

Embodiment 2

[0039] Raw material Ca 2 CO 3 , La 2 o 3 、TiO 2 、GeO 2 、Sm 2 o 3 Press Ca 0.8 La 0.133 The stoichiometric ratio of Ti0.9Ge0.1O3:0.01 Sm was weighed and uniformly mixed in a mortar for 30 minutes. The obtained fractions were put into a corundum crucible with a lid and then calcined in a calciner at 825°C ( CaCO 3 melting point), 1115°C (GeO 2 melting point) and calcined for 10 minutes at 1300°C for 2 hours. After cooling, finely ground to obtain Ca 0.8 La 0.133 Ti 0.9 Ge 0.1 o 3 : 0.01Sm fluorescent material. see test results figure 2 .

Embodiment 3

[0041] Raw material Ca 2 CO 3 , La 2 o 3 、TiO 2 、GeO 2 、Dy 2 o 3 Press Ca 0.8 La 0.133 Ti 0.9 Ge 0.1 o 3 : 0.01Dy stoichiometric ratio was weighed, uniformly mixed in a mortar, the duration was 30 minutes, the resulting split was packed into a corundum crucible with a cover and then put into a calciner for calcination, respectively at 825 ° C (CaCO 3 melting point), 1115°C (GeO 2 melting point) and calcined for 10 minutes at 1300°C for 2 hours. After cooling, finely ground to obtain Ca 0.8 La 0.133 Ti 0.9 Ge 0.1 o 3 : 0.01Dy fluorescent material. see test results image 3 .

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Abstract

The invention discloses a fluorescent material of various titanate germanates used in white light LEDs, the chemical expression of which is A a m b Ti 0.9 Ge 0.1 o 3 :cR, A is one or a combination of Mg, Ba, Sr, Ca; M is one or a combination of La, Gd, Y; O is oxygen; R is Pr, Sm, Eu, Tb, One or a combination of Dy, Mn, Cr, Bi, Ce; 0.001≤c≤0.133. The invention relates to converting ultraviolet light, near ultraviolet light and blue light into visible light with higher brightness, which can be used for white LED fluorescent materials. Fluorescent materials can be used in white light LEDs and related display and lighting devices. The raw material of the invention is cheap and easy to obtain, the preparation method is simple, the chemical property is stable, and the luminous performance is good, so it is an ideal candidate material for white light LED fluorescent powder. The invention discloses a preparation method of various titanate germanate fluorescent materials used for white light LEDs.

Description

technical field [0001] The invention belongs to the technical field of fluorescent material science, and specifically relates to a fluorescent material and a preparation method of various titanate germanates used in white light LEDs that can be effectively excited by ultraviolet, near ultraviolet and blue light. Background technique [0002] White light LED is the fourth generation of lighting electric light source after incandescent lamps, fluorescent lamps and energy-saving lamps. White light LEDs are light-emitting diodes that emit white light. White light is composed of multiple wavelengths of light. It has the advantages of high efficiency, low energy consumption, strong applicability, high stability, no pollution to the environment, and multi-color luminescence. It is called the most valuable new light source in the 21st century. The mainstream solution of LED solid-state light source today is phosphor light conversion white light LED, and the core problem is to develo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
CPCC09K11/7775C09K11/7793
Inventor 田莲花付世豪
Owner YANBIAN UNIV