A kind of cerium, terbium co-doped activated aluminosilicate luminescent phosphor and preparation method thereof

A technology of aluminosilicate and fluorescent powder, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., to achieve the effects of high emission intensity, low preparation cost and easy availability of raw materials

Active Publication Date: 2021-06-04
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are few single-matrix blue-green phosphors in the white light components that can be efficiently excited by ultraviolet light. Therefore, this patent provides a high-efficiency aluminosilicate phosphor that can be activated by co-doping of cerium and terbium excited by ultraviolet light. Changing the content of doped terbium can realize multi-color light-emitting phosphors from blue to green

Method used

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  • A kind of cerium, terbium co-doped activated aluminosilicate luminescent phosphor and preparation method thereof
  • A kind of cerium, terbium co-doped activated aluminosilicate luminescent phosphor and preparation method thereof
  • A kind of cerium, terbium co-doped activated aluminosilicate luminescent phosphor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Ca 19.96 al 26 Mg 3 Si 3 o 68 :0.2Ce 3+ ,0.2Li + ;

[0033] Weigh CaCO 3 (Analytical pure) 0.9809g, A1 2 o 3 (analytical pure) 0.6627g, MgO (analytical pure) 0.0604g, SiO 2 (Analytical pure) 0.0902g, Ce 2 (CO 3 ) 3 (99.99%) 0.0230g, Li 2 CO 3 (Analytical pure) 0.0037g. Put the above raw materials in an agate mortar, add ethanol with the same volume as the raw materials, and grind for 30 minutes to make the raw materials fully mixed. Transfer the uniformly mixed reactants into a corundum crucible, put it into a high-temperature tube furnace, and heat it under 10% (volume) H at 1350°C 2 , 90% (volume) N 2 Calcined in mixed gas for 2 hours. The reducing atmosphere in the high-temperature tube furnace was lowered to room temperature, and the calcined block sample was ground into powder in an agate mortar to obtain the required phosphor powder with a mass of 1.3877g. The sample emitted blue light under a 365nm ultraviolet lamp.

Embodiment 2

[0034] Example 2: Ca 19.90 al 26 Mg 3 Si 3 o 68 :0.2Ce 3+ ,0.3Tb 3+ ,0.5Li + ;

[0035] Weigh CaCO 3 (Analytical pure) 0.9509g, A1 2 o 3 (analytical pure) 0.6627g, MgO (analytical pure) 0.0604g, SiO 2 (Analytical pure) 0.0902g, Ce 2 (CO 3 ) 3 (99.99%) 0.0230g, Tb 4 o 7 (99.99%) 0.0280g, Li 2 CO 3 (Analytical pure) 0.0092g. Put the above raw materials in an agate mortar, add ethanol with the same volume as the raw materials, and grind for 30 minutes to make the raw materials fully mixed. Transfer the uniformly mixed reactants into a corundum crucible, put it into a high-temperature tube furnace, and heat it under 10% (volume) H at 1350°C 2 , 90% (volume) N 2 Calcined in mixed gas for 2 hours. The reducing atmosphere in the high-temperature tube furnace was lowered to room temperature, and the calcined block sample was ground into powder in an agate mortar to obtain the required phosphor powder with a mass of 1.4114g. The sample glowed green under a 365nm ul...

Embodiment 3

[0036] Example 3: Ca 19.90 al 26 Mg 3 Si 3 o 68 :0.2Ce 3+ ,0.3Tb 3+ ,0.5Li + ;

[0037] Weigh CaO (analytical pure) 0.5325g, A1 2 o 3 (analytical pure) 0.6627g, MgO (analytical pure) 0.0604g, SiO 2 (Analytical pure) 0.0902g, Ce 2 (CO 3 ) 3 (99.99%) 0.0230g, Tb 4 o 7 (99.99%) 0.0280g, Li 2 CO 3 (Analytical pure) 0.0092g. Put the above raw materials in an agate mortar, add ethanol with the same volume as the raw materials, and grind for 30 minutes to make the raw materials fully mixed. Transfer the uniformly mixed reactants into a corundum crucible, put it into a high-temperature tube furnace, and heat it under 10% (volume) H at 1350°C 2 , 90% (volume) N 2 Calcined in mixed gas for 2 hours. In the high-temperature tube furnace, the reducing atmosphere was lowered to room temperature, and the block sample obtained by calcining was ground into powder in an agate mortar to obtain the required phosphor powder with a mass of 1.4110g. The sample glowed green under ...

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Abstract

A cerium and terbium co-doped activated aluminosilicate luminescent phosphor powder and its preparation method belong to the technical field of rare earth luminescent materials, and its chemical formula representing the composition and molar composition is Ca 19.96‑ 2x al 26 Mg 3 Si 3 o 68 :0.2Ce 3+ ,xTb 3+ ,(0.2+x)A + , where A + is a charge compensator, which is Li, Na or K; x represents the number of moles doped with terbium ions, 0≤x≤0.4. The present invention synthesizes a series of fluorescent powders by a high-temperature solid-phase method, and uses corresponding oxides, hydroxides, nitrates, carbonates, etc. as raw materials when synthesizing the above products. 2 、H 2 Calcining at 1350°C-1400°C for 2-3 hours in a reducing atmosphere of a mixed gas, cooling and treating to obtain cerium and terbium co-doped activated aluminosilicate luminescent phosphors. The phosphor powder prepared by the invention has wide absorption range, high emission intensity and strong thermal stability, can be combined with ultraviolet LED chips to prepare white light LEDs with high luminous performance, and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of rare earth luminescent materials, in particular to a cerium and terbium co-doped activated aluminosilicate luminescent phosphor and a preparation method thereof. Background technique [0002] In recent years, light-emitting diodes (LEDs), solid-state lighting sources, have attracted widespread attention from all over the world due to their advantages such as long service life, high efficiency, energy saving, environmental protection and pollution-free. At present, the main way to realize white light LED is to combine LED chip and phosphor powder, and use LED chip to excite phosphor powder to mix to form white light. There are two specific methods: one is to use blue LEDs to excite phosphors that emit yellow light, and the other is to use near-ultraviolet LEDs to excite red, green and blue phosphors. In 1996, Nichia Corporation of Japan launched the Y 3 al 5 o 12 : The combination of Ce phosphor powder...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64
CPCC09K11/7774
Inventor 邹海峰安正策宋艳华张向挺董儒佳盛野郑克岩
Owner JILIN UNIV
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