Phosphor

A technology of phosphors and metal elements, applied in the field of phosphors, can solve problems such as difficulty in reducing luminous brightness, and achieve the effect of reducing luminous brightness

Inactive Publication Date: 2010-07-21
SUMITOMO CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Among the above-mentioned phosphors, it is sufficient that the emission luminance hardly decreases after irradiation with an excitation source, but there is still room for improvement from the viewpoint of obtaining a phosphor exhibiting high emission luminance.

Method used

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Experimental program
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Effect test

Embodiment

[0056] Next, the present invention will be described in detail through examples, but the present invention is not limited to these examples.

[0057] The measurement of the luminous brightness is carried out as follows. The phosphor is placed in a vacuum chamber and kept at 6.7Pa (5×10 -2 In a vacuum below Torr), vacuum ultraviolet rays were irradiated using an excimer laser 146 nm light source (Usio Denki Co., Ltd. H0012 type) or an excimer laser 172 nm light source (Usio Denki Co., Ltd. H0016 type).

[0058] The content of the halogen element in the phosphor was obtained by the following method.

[0059] That is, put 1 g of a weighed phosphor powder sample into a distillation flask together with pyrophosphoric acid, heat and dissolve the phosphor powder, and then introduce water vapor into the flask (the flask is kept at 145° C.) to fully extract the halogen to On the water vapor side, the water vapor is cooled to obtain a brine extraction solution (about 500 ml of the obtain...

Embodiment 1

[0068] Barium carbonate (manufactured by Kanto Chemical Co., Ltd.: purity 99.99%), gadolinium oxide (manufactured by Shin-Etsu Chemical Co., Ltd.: purity 99.99%), terbium fluoride (manufactured by Kanto Chemical Co., Ltd.: purity 99.99%), and silica (and Mitsujun Pharmaceutical Co., Ltd.: purity 99.99%), weighed and mixed in a molar ratio of Ba:Gd:Tb:Si of 1:3.4:0.6:3, and contained 2% by volume of H 2 N 2 It was kept at 1000° C. for 3 hours and sintered, and then slowly cooled to room temperature to obtain phosphor 2 . figure 1 The X-ray diffraction pattern of phosphor 2 is shown. according to figure 1 It is found that the X-ray diffraction pattern of the phosphor 2 is different from that of the phosphor 1 . In addition, the content of fluorine (F) in the phosphor 2 was investigated and found to be 25000 ppm, and the molar ratio of Ba:(Gd+Tb):Si:F of the phosphor was 1:4:3:1.4.

[0069] Phosphor 2 at 6.7Pa (5×10 -2 After irradiating it with vacuum ultraviolet rays using ...

Embodiment 2

[0073] Barium carbonate (manufactured by Kanto Chemical Co., Ltd.: purity 99.99%), gadolinium oxide (manufactured by Shin-Etsu Chemical Co., Ltd.: purity 99.99%), gadolinium fluoride (manufactured by Kanto Chemical Co., Ltd.: purity 99.99%) and terbium oxide (manufactured by Shin-Etsu Chemical Co., Ltd.) were used. Kogyo Co., Ltd.: purity 99.99%) and silicon dioxide (Wako Junpharmaceutical Co., Ltd.: purity 99.99%), barium carbonate (BaCO 3 ): Gadolinium oxide (Gd 2 o 3 ): Gadolinium Fluoride (GdF 3 ): Terbium oxide (Tb 4 o 7 ): silicon dioxide (SiO 2 ) in a molar ratio of 1:1.4:0.6:0.15:3 after weighing and mixing, in the presence of 2% by volume H 2 N 2 It was kept at 1000° C. for 3 hours and sintered in the environment, and then slowly cooled to room temperature to obtain phosphor 3 . In addition, the content of fluorine (F) in the phosphor 3 was investigated and found to be 25000 ppm, and the molar ratio of Ba:(Gd+TB):Si:F in the phosphor 3 was 1:4:3:1.4.

[0074] ...

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Abstract

Disclosed is a phosphor having high luminance, which is composed of M1, M2, M3, M4, a halogen element and O (M1 represents an alkaline earth metal; M2 represents a trivalent metal element; M3 represents an activator element; and M4 represents a tetravalent metal element), with the molar ratio among M1, (M2 + M3), M4, and the halogen element, namely M1:(M2 + M3):M4: halogen element being 1:4:3:a (wherein a is a number within the range of not less than 0.01 but not more than 3). The phosphor can be obtained by firing a metal compound mixture containing M1, M2, M3, M4, and a halogen element (M1, M2, M3 and M4 are as defined above), which additionally contains one or more halides selected from the group consisting of halides of M1, halides of M2 and halides of M3.

Description

technical field [0001] The present invention relates to phosphors. Background technique [0002] Phosphors are used for light emitting elements. Examples of light-emitting elements include electron beam-excited light-emitting elements in which the excitation source of phosphors is electron beams (such as electron beam tubes, electroluminescent displays, surface electric field displays, etc.), and ultraviolet-excited light-emitting elements in which the excitation sources of phosphors are ultraviolet rays ( For example, backlights for liquid crystal displays, three-wavelength fluorescent lamps, high-load fluorescent lamps, etc.), vacuum ultraviolet-ray excitation light-emitting devices whose excitation source is vacuum ultraviolet rays (such as plasma display panels, rare gas lamps, etc.), excitation sources for phosphors A white LED that emits light from a blue LED or an ultraviolet LED, a light emitting element (such as an X-ray imaging device, etc.) where the excitation s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/86C09K11/08H01J1/63H01J11/02H01J29/20H01J31/12H01J61/44H01J11/12H01J11/22H01J11/24H01J11/26H01J11/34H01J11/36H01J11/42
CPCC09K11/7773H01J2211/42H01J2329/20
Inventor 伊藤丰大观光德山根明小林笃史国本崇
Owner SUMITOMO CHEM CO LTD
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