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Phosphor, Method For Manufacturing Same, Light Emitting Device, And Image Display Device

A technology of phosphors and elements, which is applied in the field of phosphors and can solve problems such as easy decline in the brightness of phosphors

Active Publication Date: 2014-09-03
NAT INST FOR MATERIALS SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a result of exposure of the phosphor to the above-mentioned excitation source, the brightness of the phosphor tends to decrease, so it is desired to obtain a phosphor that does not decrease in brightness.

Method used

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  • Phosphor, Method For Manufacturing Same, Light Emitting Device, And Image Display Device
  • Phosphor, Method For Manufacturing Same, Light Emitting Device, And Image Display Device
  • Phosphor, Method For Manufacturing Same, Light Emitting Device, And Image Display Device

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preparation example Construction

[0208] The preparation method of such a phosphor of the present invention is not particularly limited, for example, by firing a mixture of metal compounds, that is, in an inert atmosphere environment containing nitrogen, within a temperature range of 1200° C. to 2200° C. , to be able to form a Sr 3 Si 8 o 4 N 10 The raw material mixture of inorganic compounds whose crystals are matrix crystals and in which M element is solid-dissolved is burned. The main crystal of the present invention is monoclinic and belongs to space group P2 1 / n, however, depending on the synthesis conditions such as firing temperature, crystals with a different crystal system or space group may be mixed in. In this case, since the change in luminescence characteristics is small, it can be used as a high-brightness fluorescent body.

[0209] As a starting material, for example, a mixture of metal compounds, a compound containing M, a compound containing A, a compound containing D, a compound contain...

Embodiment

[0242] The present invention will be described in more detail by the examples shown below, but they are disclosed only to help understand the present invention more easily, and the present invention is not limited to these examples.

[0243] [Raw materials used in synthesis]

[0244] The raw material powder used in the synthesis has a specific surface area of ​​11.2m 2 Silicon nitride powder (SN-E10 grade manufactured by Ube Industries, Ltd.), silicon dioxide powder (SiO 2 , High Purity Chemical Research Institute), the specific surface area is 13.2m 2 Alumina powder (Diamicron manufactured by Daemyung Chemical Industry), lithium carbonate (manufactured by High Purity Chemical Industry), boron nitride (manufactured by Denki Chemical Industry), calcium oxide (manufactured by High Purity Chemical Industry), and nitrided with a purity of 99.5% per gram of particle size Strontium (Sr 3 N 2 , manufactured by shellac), strontium oxide (manufactured by High Purity Chemical), ceri...

example 1 to example 22

[0255] According to the design composition shown in Table 2 and Table 3, raw materials were weighed so as to obtain the mixing composition (mass ratio) shown in Table 4. The composition differs depending on the type of raw material used, that is, when the design composition in Table 2 and Table 3 is different from the mixed composition in Table 4, the mixed composition is determined so that the amount of metal ions is consistent. The weighed raw material powders were mixed for 5 minutes using a silicon nitride sintered pestle and mortar. Then, the obtained mixed powder was filled in a crucible made of boron nitride. The bulk density of the powder body is about 20% to 30%.

[0256] The crucible filled with the mixed powder was installed on a graphite resistance heating electric furnace. The burning operation is as follows: First, set the burning atmosphere environment to 1×10 through the diffusion pump -1 Vacuum at a pressure below Pa, and heat from room temperature to 800°C...

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Abstract

According to the present invention, a chemically and thermally stable phosphor having unconventional light emitting properties, and having high light emitting intensity even when combined with an LED at 470 nm or less, contains crystals expressed by A3(D,E)8X1 4 that contain: element A, element D, and element X (where A represents one or more element selected from Li, Mg, Ca, Sr, and Ba; D represents one or more element selected from Si, Ge, Sn, Ti, Zr, Hf, and X represents one or more elements selected from O, N, and F), and if necessary element E (where E represents one or more elements selected from B, Al, Ga, In, Sc, Y, and La); crystals expressed by Sr3Si8O4N1 0; inorganic crystals having the same crystalline structure as the crystals expressed by Sr3Si8O4N1 0; or an inorganic compound in the form of a solid solution of element M (where M represents one or more elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb) in these solid-solution crystals.

Description

technical field [0001] The present invention relates to phosphor, its preparation method and its use. The phosphor at least contains elements A, D, and X (A is one or more elements selected from Li, Mg, Ca, Sr, Ba; D is selected from Si, Ge, Sn, Ti, One or more elements of Zr, Hf; X is at least one element selected from O, N, F), and contains E elements as required (E is selected from B, Al, Ga, In, Sc, One or more elements of Y, La) from A 3 (D,E) 8 x 14 The crystal shown (solid solution crystallization), by Sr 3 Si 8 o 4 N 10 The crystal shown, with Sr 3 Si 8 o 4 N 10 Inorganic crystals with the same crystal structure as shown in the crystals, or solid solution of these crystals, M element (wherein, M is at least one selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Yb) elements) inorganic compounds. Background technique [0002] Phosphors are used in vacuum fluorescent display (VFD (Vacuum-Fluorescent Display)), field emission display (FED (Field Emission Display...

Claims

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Application Information

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IPC IPC(8): C09K11/59C09K11/08C09K11/63C09K11/64H01J1/63H01L33/50
CPCC30B29/34H01J17/49H01L2224/8592H01L2924/0002C09K11/7792C30B1/04H01L33/504G02F1/133603C09K11/7749H01L33/502C09K11/7721H01J29/20G02F2001/133614H01J19/57F21K9/56H01L2224/45144C09K11/7706H01L2224/48091C09K11/7764H01J11/42C09K11/7734H01L2924/12044H01L2924/181F21K9/64C09K11/77927C09K11/77347C09K11/77067C09K11/77217C09K11/77348C09K11/77497H01L2924/00014H01L2924/00H01L2924/00012C09K11/59C09K11/63C09K11/64H01J1/63H05B33/14C09K11/08C09K11/77068G02F1/133614
Inventor 广崎尚登武田隆史舟桥司朗
Owner NAT INST FOR MATERIALS SCI
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