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Single-phase whitelight fluorescent powder for ultraviolet light excitation

A technology of ultraviolet light and phosphor powder, applied in the field of light-emitting, can solve the problems of unsatisfactory light-emitting performance and lack of white light phosphor powder, etc.

Inactive Publication Date: 2006-10-25
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is a shortage of white light phosphors that match the near-ultraviolet light tube core, and the luminous performance is not ideal. This white light phosphor is generally prepared by mixing three primary color phosphors of red, green and blue.

Method used

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  • Single-phase whitelight fluorescent powder for ultraviolet light excitation

Examples

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Effect test

Embodiment 1

[0010] Embodiment 1: Preparation of Eu xy Sr y-xy MgSi z o 2z+y+1 , where x=0.01; y=2; z=0.5, the specific expression is: Eu 0.02 Sr 1.98 MgSi 0.5 o 4 . Calculate and weigh raw materials according to x=0.01; y=2; z=0.5, weigh 3.52g Eu 2 o 3 , 292.2 g SrCO 3 , 40.3g MgO and 30g SiO 2 , to mix them. After fully grinding and mixing the above raw materials, put them into a high-purity corundum crucible or a platinum crucible, and put them into a high-temperature furnace; heat them for 3-5 hours at a temperature of 1100°C-1400°C under carbon or hydrogen reduction conditions, and then take them out Obtain a single-phase white phosphor: Eu 0.02 Sr 1.98 MgSi 0.5 o 4 .

Embodiment 2

[0011] Embodiment 2: Preparation of Eu xy Sr y-xy MgSi z o 2z+y+1 , where x=0.05, y=2, z=0.5, the specific expression is: Eu 0.1 Sr 2-0.1 MgSi 0.5 o 4 . Calculate and weigh raw materials according to x=0.05, y=2, z=0.5, weigh 17.6g Eu 2 o 3 , 280.44 g SrCO 3 , 40.3g MgO and 30g SiO 2 , to mix them. After fully grinding and mixing the above raw materials, put them into a high-purity corundum crucible or a platinum crucible, and put them into a high-temperature furnace; heat them for 3-5 hours at a temperature of 1100°C-1400°C under carbon or hydrogen reduction conditions, and then take them out Obtain a single-phase white phosphor Eu 0.1 Sr 2-0.1 MgSi 0.5 o 4 .

Embodiment 3

[0012] Embodiment 3: Preparation of Eu xy Sr y-xy MgSi z o 2z+y+1 , where x=0.01, y=2.8, z=0.5, the specific expression is: Eu 0.028 Sr 2.8-0.028 MgSi 0.5 o 4.8 . Calculate and weigh raw materials according to x=0.01, y=2.8, z=0.5, weigh 4.928g Eu 2 o 3 , 409.15 g SrCO 3 , 40.3g MgO and 30g SiO 2 , to mix them. After fully grinding and mixing the above raw materials, put them into a high-purity corundum crucible or a platinum crucible, and put them into a high-temperature furnace; heat them for 3-5 hours at a temperature of 1100°C-1400°C under carbon or hydrogen reduction conditions, and then take them out Obtain a single-phase white phosphor Eu 0.028 Sr 2.8-0.028 MgSi 0.5 o 4.8 .

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Abstract

The invention relates to a singleness phase white light fluorescent dye suitable for ultraviolet light and the manufacture method. It includes the following steps: grinding the raw material, putting into high purity corundum crucible or platinum crucible, putting into high-temperature furnace; under the condition of 1100-1400 degree centigrade and carbon or hydrogen deoxidization, heating 3-5 hours to gain the whit light fluorescent dye. The invention could be used in the new generation white light LED and the current fluorescent lamp.

Description

technical field [0001] The invention belongs to the technical field of light emission, and relates to a single-phase white light phosphor suitable for ultraviolet light (250-450nm) excitation, in particular to a single-phase white light phosphor suitable for ultraviolet light excitation and a preparation method. Background technique [0002] In 1993, Japan's Nichia Chemical Corporation made a technological breakthrough and successfully developed a blue-light GaN light-emitting diode (LED), which brought the dawn of the era of semiconductor solid-state lighting. Compared with incandescent tungsten bulbs and fluorescent lamps, semiconductor lighting has many advantages such as non-toxic, long life (100,000 hours), high efficiency and energy saving, all solid state, low working voltage, good shock resistance and safety, and will become an alternative in the 21st century. A new light source for traditional lighting fixtures. In 1997, Nichia Chemical Corporation used the blue li...

Claims

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Application Information

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IPC IPC(8): C09K11/79
CPCY02B20/00
Inventor 张家骅孙晓园王笑军张霞
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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