Multicolor fluorescent material regulated through crystal forms and preparation method and application thereof

A technology for controlling fluorescent materials and crystal forms, which can be used in luminescent materials, chemical instruments and methods, electrical components, etc., and can solve the problems of easy deliquescence, poor chemical stability of sulfide fluorescent materials, and difficulty in obtaining raw materials.

Inactive Publication Date: 2016-01-13
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sulfide fluorescent materials have poor chemical stability and are prone to deliquescence, while the preparation conditions of nitride phosphors are harsh and the raw materials are not easy to obtain

Method used

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  • Multicolor fluorescent material regulated through crystal forms and preparation method and application thereof
  • Multicolor fluorescent material regulated through crystal forms and preparation method and application thereof
  • Multicolor fluorescent material regulated through crystal forms and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for preparing a multicolor fluorescent material controlled by crystal form, the chemical formula of the multicolor fluorescent material is Ca 2 SiO 4 : 0.02Ce 3+ , the preparation steps are as follows:

[0036] According to the chemical formula of the material Ca 2 SiO 4 : 0.02Ce 3+ Accurately Weigh CaCO 3 , SiO 2 and CeO 2 Raw material, Ce 3+ Ions replace Ca 2 SiO 4 Ca in 2+ Ion measurement: put the weighed raw materials into an agate mortar, add 50% alcohol as a grinding medium, mix and dry them evenly, and put them into a corundum crucible. 2 The volume percentage is 10% N 2 +H 2 The mixed gas is a reducing atmosphere, calcined in a horizontal tube furnace at 1450°C for 12 hours, taken out for grinding, put into the tube furnace again and calcined at 1400°C for 6 hours in the same reducing atmosphere, and naturally cooled to room temperature to obtain fluorescence Material. The XRD diffraction pattern of the fluorescent material that present e...

Embodiment 2

[0038] A method for preparing a multicolor fluorescent material controlled by crystal form, the chemical formula of the multicolor fluorescent material is Ca 2 SiO 4 : 0.04Eu 2+ , the preparation steps are as follows:

[0039] According to the chemical formula of the material Ca 2 SiO 4 : 0.04Eu 2+ Accurately Weigh CaCO 3 , SiO 2 and Eu 2 o 3 Raw materials, Eu 2+ Ions replace Ca 2 SiO 4 Ca in 2+ Ion measurement: put the weighed raw materials into an agate mortar, add 50% alcohol as a grinding medium, mix and dry them evenly, and put them into a corundum crucible. 2 The volume percentage is 10% N 2 +H 2 The mixed gas is a reducing atmosphere, calcined in a horizontal tube furnace at 1450°C for 12 hours, taken out for grinding, put into the tube furnace again and calcined at 1400°C for 6 hours in the same reducing atmosphere, and naturally cooled to room temperature to obtain fluorescence Material. The XRD diffraction pattern of the fluorescent material that pres...

Embodiment 3

[0041] A method for preparing a multicolor fluorescent material controlled by crystal form, the chemical formula of the multicolor fluorescent material is Ca 2 SiO 4 : 0.02Ce 3+ ,0.04Al 3+ , the preparation steps are as follows:

[0042] According to the chemical formula of the material Ca 2 SiO 4 : 0.02Ce 3+ ,0.04Al 3+ Accurately Weigh CaCO 3 , SiO 2 , CeO 2 and Al 2 o 3 Raw material, Ce 3+ and Al 3+ ions respectively replace Ca 2 SiO 4 Ca in 2+ and Si 4+ Ion measurement: put the weighed raw materials into an agate mortar, add 50% alcohol as a grinding medium, mix and dry them evenly, and put them into a corundum crucible. 2 The volume percentage is 10% N 2 +H 2 The mixed gas is a reducing atmosphere, calcined in a horizontal tube furnace at 1450°C for 12 hours, taken out for grinding, put into the tube furnace again and calcined at 1400°C for 6 hours in the same reducing atmosphere, and naturally cooled to room temperature to obtain fluorescence Material....

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Abstract

The invention provides a multicolor fluorescent material regulated through crystal forms. The general chemical formula of the material is Ca2SiO4:xRe,yM, wherein Re is a rare earth ion Ce<3+> or Eu<2+>, M is a doping agent for regulating the crystal forms, the additive quantity of Re is 0.001<=x<=0.4 by molar volume, and the additive quantity of M is 0.00<=y<=1.0 by molar volume; the Ca2SiO4 fluorescent material with the light-emitting color adjustable and five kinds of the crystal forms of gamma-, beta-, alpha'L-, alpha'H- and alpha- is prepared and synthesized by doping the crystal form regulating agent M, and the fluorescent material can achieve color-adjustable emission of blue light, green light, yellow light and red light in the whole visible light range under excitation of near ultraviolet or blue light. The multicolor fluorescent material regulated through the crystal forms has the advantages that the different crystal forms can be obtained only by doping the crystal form regulating agent, so that the fluorescent material with the different light-emitting colors is prepared; the preparation and synthesis technology is simple, the cost is low, and the potential application prospect on LED illumination and display devices are achieved.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic materials and devices, and in particular relates to a polychromatic fluorescent material controlled by crystal form and its preparation method and application. Background technique [0002] Against the backdrop of global low-carbon, energy-saving, and environmental protection, semiconductor lighting and display technologies have developed rapidly and been widely used in the past few decades. In 2014, the Royal Swedish Academy of Sciences awarded the Nobel Prize in Physics to three scientists who invented the blue LED, injecting more firm confidence and positive signals into the global semiconductor lighting industry. The industry predicts that the next twenty years or longer will be the golden development period of the LED lighting industry. Phosphor powder is one of the key materials to realize white LED, and its luminous characteristics determine the light efficiency, color temperature, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59H01L33/50
Inventor 毛智勇陈静静王达健卢志娟许姣杨艳芳
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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