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Fluorescent material for preparing LED lamp and application

A technology of fluorescent materials and LED lamps, which is applied in the field of fluorescent materials, can solve the problems of high color temperature, low yield, and low color rendering index of light sources, and achieve the effects of simple operation steps, good crystallinity of samples, and good luminous purity

Inactive Publication Date: 2019-01-01
江苏锐阳照明电器设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the research on white light LED is still one of the current priorities, because the current commercial white light LED products mainly use blue light LED to excite yellow phosphor YAG:Ce to form white light. The color rendering index is low and the color temperature is high, which is difficult to meet the application requirements of high-performance devices
Subsequently, with the commercial red phosphor Y 2 o 3 :Eu 3+ This phenomenon has been improved, but the red phosphor cannot effectively absorb in the near ultraviolet range, which greatly reduces the brightness of the light, so its application is still not optimistic
Moreover, the existing phosphor preparation process is complicated and the yield is not high, which limits its normal use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] According to the chemical formula Na 0.1 Eu 1.9 Zn 2 Mo 2 o 9 The stoichiometric ratio of each element in the formula is weighed separately: sodium carbonate Na 2 CO 3 : 0.026 g, europium oxide Eu 2 o 3 : 1.672 g, ammonium molybdate (NH 4 ) 6 m O7 o 24 .4H 2 O: 1.766 grams. After grinding and mixing uniformly in an agate mortar, pre-sintering is carried out in an air atmosphere in a muffle furnace, the pre-sintering temperature is 300°C, and the pre-sintering time is 4 hours, and then this operation is repeated for pre-sintering again. After cooling to room temperature, take out the sample, fully mix and grind the mixture, and calcine in the air atmosphere. The calcination temperature is 800°C, and the calcination time is 6 hours. Then cool to room temperature, take out the sample and grind it evenly to obtain a powder of red phosphor.

[0013] Characterized by XRD, the sample has good crystallinity and high purity, and can have an obvious luminescence pea...

Embodiment 2

[0015] Prepare Na according to the chemical formula 0.25 Eu 1.75 Zn 2 Mo 2 o 9 The stoichiometric ratio of each element in is weighed separately: Sodium oxide Na 2 O: 0.039 g, europium oxide Eu 2 o 3 : 1.54 g, molybdenum oxide MoO 3 : 1.44 g. After grinding and mixing uniformly in an agate mortar, pre-sintering is carried out in an air atmosphere in a muffle furnace, the pre-sintering temperature is 500°C, and the pre-sintering time is 7 hours, and then this operation is repeated for pre-sintering again. After cooling to room temperature, take out the sample, fully mix and grind the mixture, and calcine in the air atmosphere. The calcination temperature is 1000°C, and the calcination time is 10 hours. Then slowly cool to room temperature, take out the sample and grind evenly to obtain powder shaped red phosphor.

[0016] The sample prepared in this embodiment is basically the same as in Example 1.

Embodiment 3

[0018] According to the chemical formula NaEuMo 2 o 9 The stoichiometric ratio of each element in the formula is weighed separately: sodium nitrate NaNO 3 : 0.424 g, europium oxide Eu 2 o 3 : 0.352 g, molybdenum oxide MoO 3 : 1.44 g. After grinding and mixing evenly in an agate mortar, pre-sintering is carried out in an air atmosphere in a muffle furnace. The pre-sintering temperature is 500°C, and the pre-sintering time is 6 hours. After cooling to room temperature, take out the sample and fully mix the mixture again Mix and grind evenly, then calcinate in air atmosphere, the calcining temperature is 1000°C, and the calcining time is 6 hours, then slowly cool to room temperature, take out the sample and grind evenly to obtain powdery red fluorescent powder.

[0019] The sample prepared in this embodiment is basically the same as in Example 1.

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Abstract

The invention discloses a fluorescent material for preparing an LED lamp and application. A chemical formula is Na2-2xEu2xMo2O9, wherein x is a molar percentage of trivalence europium ions Eu<3+>, andx is greater than or equal to 0.001 and less than 1.0. The raw materials adopted by the invention are easy to obtain, the operation procedures are simple, and the repeatability is good; the fluorescent material prepared in the invention can emit red light and is good in sample crystallization, high in purity and excellent in performance, and is good in light emitting purity, high in brightness and applicable to the preparation of a luminescent element.

Description

technical field [0001] The invention relates to a fluorescent material that can be used for preparing LED lamps and its application, and belongs to the field of physical optoelectronics. Background technique [0002] With the continuous development of society, corresponding technologies such as electronic equipment and devices are constantly being updated, and white light-emitting diodes (white LEDs) have been widely popularized in lighting, flat panel display, lighting decoration and other fields. But the research on white light LED is still one of the current priorities, because the current commercial white light LED products mainly use blue light LED to excite yellow phosphor YAG:Ce to form white light. The color rendering index is low and the color temperature is high, which makes it difficult to meet the application requirements of high-performance devices. Subsequently, with the commercial red phosphor Y 2 o 3 :Eu 3+ However, the red phosphor cannot effectively abs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78H01L33/50
CPCC09K11/7736H01L33/502Y02B20/00
Inventor 秦吉胜
Owner 江苏锐阳照明电器设备有限公司
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