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Synthesis method of Sr3SiO5: Eu fluorescent powder with uniform particle size of 5-7[mu]m

A synthesis method, a technology of uniform particle size, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of large particle size and uneven particle size of phosphors

Inactive Publication Date: 2016-07-20
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the Sr prepared by this preparation method 3 SiO 5 : The particle size of Eu phosphor is relatively large, within the range of 10-30 μm, and the particle size is not uniform, and the uniformity is greater than ±10%

Method used

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  • Synthesis method of Sr3SiO5: Eu fluorescent powder with uniform particle size of 5-7[mu]m
  • Synthesis method of Sr3SiO5: Eu fluorescent powder with uniform particle size of 5-7[mu]m
  • Synthesis method of Sr3SiO5: Eu fluorescent powder with uniform particle size of 5-7[mu]m

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] SrCO 3 (A.R.), Ultrafine SiO 2 (A.R.), C 6 h 8 o 7 (A.R.), Eu 2 o 3 (4N) as raw material to prepare Sr 3 SiO 5 :Eu 0.07 Orange fluorescent powder. SrCO 3 The addition amount is 45g, superfine SiO 2 The addition amount is 6g, Eu 2 o 3 The addition amount is 1.23g, C 6 h 8 o 7 The addition amount of is 0.38g. The various raw materials are placed in an agate mortar and thoroughly ground and mixed to obtain a raw material mixture. The raw material mixture is placed in an alumina crucible, the alumina crucible is placed in a sagger of a microwave oven, the cavity of the microwave oven is connected to the atmosphere, and then N 2 / H 2 Mix gas, start microwave heating, heating temperature 1400°C, heating time 100min, stop microwave heating, and get the product Sr after cooling 3 SiO 5 :Eu 0.07 Orange fluorescent powder.

Embodiment 2

[0012] SrCO 3 (A.R.), Ultrafine SiO 2 (A.R.), C 2 h 2 o 4 (A.R.), Eu 2 o 3 (4N) as raw material to prepare Sr 3 SiO 5 :Eu 0.07 Orange fluorescent powder. SrCO 3 The addition amount is 45g, superfine SiO 2 The addition amount is 6g, Eu 2 o 3 The addition amount is 1.23g, C 6 h 2 o 4 The addition amount of is 0.78g. The various raw materials are placed in an agate mortar and thoroughly ground and mixed to obtain a raw material mixture. The raw material mixture is placed in an alumina crucible, the alumina crucible is placed in a sagger of a microwave oven, the cavity of the microwave oven is connected to the atmosphere, and then N 2 / H 2 Mix gas, start microwave heating, heating temperature 1300°C, heating time 120min, stop microwave heating, and get the product Sr after cooling 3 SiO 5 :Eu 0.07 Orange fluorescent powder.

Embodiment 3

[0014] SrCO 3 (A.R.), Ultrafine SiO 2 (A.R.), C 6 h 8 o 6 (A.R.), Eu 2 o 3 (4N) as raw material to prepare Sr 3 SiO 5 :Eu 0.07 Orange fluorescent powder. SrCO 3 The addition amount is 45g, superfine SiO 2 The addition amount is 6g, Eu 2 o 3 The addition amount is 1.23g, C 6 h 8 o 6The addition amount of is 1.3g. The various raw materials are placed in an agate mortar and thoroughly ground and mixed to obtain a raw material mixture. The raw material mixture is placed in an alumina crucible, the alumina crucible is placed in a sagger of a microwave oven, the cavity of the microwave oven is connected to the atmosphere, and then N 2 / H 2 Mix gas, start microwave heating, heating temperature 1600°C, heating time 20min, stop microwave heating, and get the product Sr after cooling 3 SiO 5 :Eu 0.07 Orange fluorescent powder.

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Abstract

The invention relates to a synthesis method of Sr3SiO5: Eu fluorescent powder with uniform particle size of 5-7[mu]m, and belongs to the technical field of optical functional materials. The particle size of the Sr3SiO5: Eu fluorescent powder prepared by the conventional method is large, is within the range of 10-30 [mu]m and is not uniform in particle size, and the uniformity is more than minus 10% to 10%. According to the synthesis method provided by the invention, raw materials include SrCO3, SiO2 and Eu2O3. Synthesis is performed under reducing atmosphere in a microwave heating manner. The synthesis method is characterized in that the raw materials further include an organic compound serving as a wave absorbing agent, wherein the organic compound is one or two of acetic acid, citric acid, oxalic acid, stearic acid, ascorbic acid, glucose and cane sugar; an oven chamber of a microwave oven is communicated with atmosphere, the heating temperature is 1300-1600 DEG C, and the heating time is 10-120min. The synthesized Sr3SiO5: Eu fluorescent powder with the uniform particle size of 5-7[mu]m is used for manufacturing white light LEDs.

Description

technical field [0001] The invention relates to a Sr with a uniform particle size of 5-7 μm 3 SiO 5 : Synthetic method of Eu phosphor, using microwave heating method, supplemented with organic absorbing agent, synthesized Sr with uniform particle size of 5-7μm 3 SiO 5 The invention relates to Eu phosphor powder, which is used to manufacture white light LEDs and belongs to the technical field of optical functional materials. Background technique [0002] Under blue light excitation, Sr 3 SiO 5 :Eu can emit 575nm fluorescence, such as figure 1 shown. Warm white light is obtained by recombining the 575nm fluorescent green light with red light and blue light, and has a higher color rendering index. Sr 3 SiO 5 : Eu, as a silicate-based phosphor, has good chemical stability and thermal stability, and its main preparation raw material, high-purity silica, is cheap and easy to obtain. Therefore, Sr 3 SiO 5 :Eu has become the preferred raw material for the manufacture of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59
CPCC09K11/592
Inventor 刘全生张希艳柏朝晖卢利平米晓云王晓春王能利孙海鹰
Owner CHANGCHUN UNIV OF SCI & TECH
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