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Magnesium aluminate blue fluorescent powder blended with barium strontium

A technology of blue phosphor, magnesium aluminate, applied in the field of materials

Inactive Publication Date: 2010-07-14
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The research group where the inventor belongs once invented a kind of "blue phosphor" and applied for a patent. The patent application number is 200910021439.1, which provides a blue phosphor with high luminous intensity, good stability and high color purity. Powder and its simple preparation method, but in terms of its luminous intensity and color purity, there is still a big gap in practical application, which needs to be further improved

Method used

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  • Magnesium aluminate blue fluorescent powder blended with barium strontium
  • Magnesium aluminate blue fluorescent powder blended with barium strontium
  • Magnesium aluminate blue fluorescent powder blended with barium strontium

Examples

Experimental program
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Effect test

Embodiment 1

[0031] To prepare with the general formula Ba x Sr y Mg 1-x-y-z Al 2 o 4 :Eu z 10g of magnesium aluminate blue fluorescent powder doped with barium strontium is taken as an example, where x is the number of moles of barium atoms, y is the number of moles of strontium atoms, z is the number of moles of europium atoms, x takes a value of 0.07, and y The value is 0.12, and the value of z is 0.02. The raw materials used and the preparation method thereof are as follows:

[0032] 1. Raw material pretreatment

[0033] Strontium carbonate and europium oxide were pre-fired in a high-temperature furnace at 850°C for 2 hours to remove moisture and impurities.

[0034] 2. Ingredients

[0035] According to the general formula Ba 0.07 Sr 0.12 Mg 0.79 Al 2 o 4 :Eu 0.02 Weighed 1.2452g of strontium carbonate, 0.9710g of barium carbonate, 5.3935g of basic magnesium carbonate, 10.9654g of aluminum hydroxide, 0.2474g of europium oxide, and 0.5g of boric acid, and ground them in a m...

Embodiment 2

[0044] To prepare with the general formula Ba x Sr y Mg 1-x-y-z Al 2 o 4 :Eu z 10g of magnesium aluminate blue fluorescent powder doped with barium and strontium is taken as an example, where x is the number of moles of barium atoms, y is the number of moles of strontium atoms, z is the number of moles of europium atoms, x takes a value of 0.005, and y The value is 0.005, and the value of z is 0.005. The raw materials used and the preparation method thereof are as follows:

[0045] In batching step 2, according to the general formula Ba 0.005 Sr 0.005 Mg 0.985 Al 2 o 4 :Eu 0.005 Weigh respectively 0.0519g of strontium carbonate, 0.0694g of barium carbonate, 6.7248g of basic magnesium carbonate, 10.9654g of aluminum hydroxide, and 0.0618g of europium oxide, and add 0.1g of boric acid. The other steps of this step are the same as in Example 1, and the raw materials are prepared mixture. The other steps are the same as in Example 1, and a barium-strontium-doped magnes...

Embodiment 3

[0047] To prepare with the general formula Ba x Sr y Mg 1-x-y-z Al 2 o 4 :Eu z 10g of magnesium aluminate blue phosphor doped with barium strontium is taken as an example, where x is the molar number of barium atoms, y is the molar number of strontium atoms, z is the molar number of europium atoms, x is 0.15, and y is 0.20, z is 0.10, used raw material and preparation method thereof are as follows:

[0048] In batching step 2, according to the general formula Ba 0.15 Sr 0.20 Mg 0.55 Al 2 o 4 :Eu 0.10 Weigh respectively 2.0754g of strontium carbonate, 2.0807g of barium carbonate, 3.7550g of basic magnesium carbonate, 10.9654g of aluminum hydroxide, 1.2369g of europium oxide, and add 0.7g of boric acid. The other steps of this step are the same as in Example 1, and the raw materials are prepared mixture. Other steps are the same as in Example 1 to prepare blue phosphor.

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Abstract

The invention relates to magnesium aluminate blue fluorescent powder doped with barium strontium, containing the materials represented in the general formula: BaxSryMgl-x-y-z Al2O4: Euz, wherein x is the mole number of barium atoms, y is the mole number of strontium atoms, z is the mole number of europium atoms, x is not less than 0.005 and not greater than 0.15, y is not less than 0.005 and not greater than 0.20, and z is not less than 0.005 and not greater than 0.10. After the magnesium aluminate blue fluorescent powder doped with the barium strontium is tested by using a fluorospectro photometer and an ambient scanning electron microscope, the result indicates that the excitation spectrum of the magnesium aluminate blue fluorescent powder doped with the barium strontium is a broadband-shaped spectrum of 230-400 nm, the central wavelength of the excitation spectrum is 304 nm, the emission spectrum of the magnesium aluminate blue fluorescent powder doped with the barium strontium is a band-shaped spectral line of 400-500nm under the excitation of ultraviolet light of 304 nm and 365 nm, the central wavelength of the emission spectrum is 440 nm, and the spectrums of the magnesium aluminate blue fluorescent powder are in accordance with the spectrum of the conventional blue fluorescent powder; and therefore, the prepared magnesium aluminate fluorescent powder doped with the barium strontium is blue fluorescent powder, and the grain diameter of the grains of the blue fluorescent powder is 2-3 mum.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a magnesium aluminate blue fluorescent powder doped with barium and strontium. Background technique [0002] At present, rare earth luminescent materials have been widely used in luminescence, display, information transmission, solar photoelectric conversion, X-ray imaging, laser, scintillator and other fields, and become supporting materials in information display, lighting source, optoelectronic devices, agriculture, military and other fields. , playing an increasingly important role. Therefore, the research and application of new fluorescent materials, as one of the important research fields of materials chemistry and materials physics, has been widely concerned by people. The advancement of modern science and technology has continuously put forward new requirements for luminescent materials. In recent years, plasma display screens have been greatly improved in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64
Inventor 焦桓周兰
Owner SHAANXI NORMAL UNIV