Green light luminescent material and preparation method thereof

A luminescent material and green light technology, applied in the field of green light emitting materials and their preparation, can solve the problems of high color temperature and low color rendering, and achieve the effects of high luminous intensity, high luminous efficiency and control of process conditions

Inactive Publication Date: 2010-12-22
OCEANS KING LIGHTING SCI&TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a primary color luminescent material for the two obvious deficiencies of low color rendering and high color temperature of fluorescent materials used in white light emission in the prior art, specifically to provide a suitable Green light-emitting materials that are excited by LEDs in the ultraviolet region to achieve high-efficiency green light emission

Method used

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  • Green light luminescent material and preparation method thereof
  • Green light luminescent material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] 0.4CaO 0.6Al 2 o 3 1.0 SiO2 2 : Preparation of 0.001Tb: Weigh calcium carbonate (CaCO 3 ) 0.4g, alumina (Al 2 o 3 ) 0.612g, silicon dioxide (SiO 2 ) 0.601g and terbium oxide (Tb 4 o 7 ) 0.00187g, put the weighed raw materials into a corundum crucible after grinding and mixing them evenly in an agate mortar, put the corundum crucible into a high-temperature box furnace, heat up to 1300°C and heat-preserve and calcinate for 12 hours, then cool to room temperature , to obtain the intermediate product, after grinding the intermediate product evenly, put it into the corundum crucible again, and then put the corundum crucible into the high temperature tube furnace, under 95% N 2 +5%H 2 Raise the temperature to 1300°C in a reducing atmosphere, heat-preserve and calcinate for 10 hours under this condition, then cool to room temperature, and grind the cooled product to obtain a green luminescent material added with rare earth element Tb. The green light-emitting materia...

Embodiment 2

[0023] 2.5CaO 1.0Al 2 o 3 1.0 SiO2 2 : Preparation of 0.5Tb: Weigh calcium oxide (CaO) 1.4g, aluminum oxide (Al 2 o 3 ) 1.02g, silicon dioxide (SiO 2 ) 0.601g and terbium oxide (Tb 4 o 7 ) 0.9346g, put the weighed raw materials into a corundum crucible after grinding and mixing them evenly in an agate mortar, put the corundum crucible into a high-temperature box furnace, heat up to 1400°C and heat-preserve for 20 hours, then cool to room temperature , to obtain an intermediate product, after grinding the intermediate product evenly, put it into a corundum crucible again, then put the corundum crucible into a high-temperature tube furnace, raise the temperature to 1000°C under H2 reducing atmosphere, and heat-preserve and calcinate under this condition for 20 hours, and then cooled to room temperature, and the cooled product was ground to obtain a green luminescent material added with rare earth element Tb. The green light-emitting material of this embodiment emits green...

Embodiment 3

[0025] 1.0CaO 0.5Al 2 o 3 1.0 SiO2 2 : Preparation of 0.1Tb: Weigh calcium carbonate (CaCO 3 ) 1.0g, alumina (Al 2 o 3 ) 0.51g, silicon dioxide (SiO 2 ) 0.601g and terbium oxide (Tb 4 o 7 ) 0.1869g, put the weighed raw materials into a corundum crucible after grinding and mixing them evenly in an agate mortar, then put the corundum crucible into a high-temperature box furnace, heat up to 1200°C and heat-preserve and calcinate for 12 hours, then cool to room temperature , to obtain the intermediate product, after grinding the intermediate product evenly, put it into the corundum crucible again, and then put the corundum crucible into the high temperature tube furnace, under 95% N 2 +5%H 2 Raise the temperature to 1200°C in a reducing atmosphere, heat-preserve and calcinate for 10 hours under this condition, then cool to room temperature, and grind the cooled product to obtain a green luminescent material added with rare earth element Tb. The green light-emitting materi...

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Abstract

The invention discloses a green light luminescent material which comprises the material with the following chemical formula: a CaO. B Al2O3, c SiO2: x Tb, wherein the a is larger than and equal to 0.4 and is less than and equal to 2.5, the b is larger than or equal to 0.2 and is less than or equal to 1.5, the c=1.0, and the x is larger than or equal to 0.001 and is less than or equal to 0.8. The green light luminescent material has high luminous efficiency, good stability and high luminous intensity, can be used in 'UV-LED+red, green and blue three-base color fluorescent powder', and replacesthe LED chip and is matched with the cerium-activated tombarthite garnet yellow fluorescent powder to send the white light. The preparation method of the green light luminescent material comprises the following steps of: adopting at least one oxide, carbonate and oxalate of Ca, Al2O3, SiO2 and Tb4O7 as raw materials, calcinating at high temperature under the reducing atmosphere, cooling to room temperature, and grinding to obtain the green light luminescent material. The preparation method of the green light luminescent material is simple in technology step, easy to control the technical conditions, easy to operate and low in cost.

Description

technical field [0001] The invention belongs to the technical field of lighting, and relates to a luminescent material and a preparation method thereof, in particular to a green light luminescent material and a preparation method thereof. Background technique [0002] Because semiconductor lighting technology (LED) has many advantages such as energy saving, green environmental protection, and flexible application, especially the new semiconductor lighting source represented by the third-generation semiconductor material gallium nitride, the power consumption of the same brightness is only that of ordinary incandescent lamps. 1 / 10, life can reach more than 100,000 hours. LEDs are widely used in various indications, displays, decorations, backlights and general lighting and other fields. [0003] At present, the mainstream way to realize white light emission of LEDs is to combine blue LED chips with cerium-activated rare earth garnet yellow phosphors (such as YAG:Ce 3+ or TA...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80H01L33/00
CPCY02B20/181Y02B20/00
Inventor 周明杰马文波时朝璞
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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