Method for preparing red luminescence material of calcium sulfide or alkaline earth sulphides activated by rare earth europium

A technology of red luminescence and calcium sulfide, which is applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of high production cost, complex process and great human toxicity, and achieves low production cost, wide application prospect and simple operation. Effect

Inactive Publication Date: 2007-02-21
上海宝鼎机械设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Alkaline earth metal sulfides excited by rare earth divalent europium are very good red luminescent materials. The usual preparation method is to use alkaline earth sulfate as raw mater

Method used

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  • Method for preparing red luminescence material of calcium sulfide or alkaline earth sulphides activated by rare earth europium
  • Method for preparing red luminescence material of calcium sulfide or alkaline earth sulphides activated by rare earth europium
  • Method for preparing red luminescence material of calcium sulfide or alkaline earth sulphides activated by rare earth europium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 10.02g CaCO 3 , 9.6g S, 0.32g Eu 2 o 3 , 0.3g CaF 2 After fully mixing and grinding, put it into a corundum crucible, and burn it at 900°C for 2 hours in a reducing atmosphere with activated carbon to obtain red crystals.

Embodiment 2

[0027] Weigh 7.4g SrCO 3 , 5 g CaCO 3 , 6.4g S, 0.16g Eu 2 o 3 , 0.2 g SrF 2 After fully mixing and grinding, put it into a corundum crucible, and burn it at 1000°C for 1 hour in a reducing atmosphere with activated carbon to obtain orange-red crystals.

Embodiment 3

[0029] Weigh 14.7g SrCO 3 , 6.4g S, 0.24g Eu 2 o 3 , 0.2 g SrF 2 After fully mixing and grinding, put it into a corundum crucible, and burn it at 1100°C for 1.5 hours in a reducing atmosphere with activated carbon to obtain orange crystals.

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Abstract

This invention relates to a method for preparing rare earth Eu-activated calcium sulfide or alkaline earth metal sulfide red-fluorescent material. The method comprises: (1) weighing calcium carbonate or alkaline earth metal carbonate, europium oxide and sulfur according to the chemical formula of Ca1-xSn : Eux or MyCa1-x-ySn : Eux (x = 0.001-0.04 mol, n = 1-3, M = one or more of Mg, Sr, Ba and Zn, and y = 0-1); (2) grinding and mixing the raw materials completely, and placing in a torrefaction container; (3) torrefying at 900-1200 deg.C for 30-120 min to obtain red-fluorescent powder. The method has such advantages as simple operation, low cost and no harm to operators. The emitting peak of the fluorescent material can change within the range of 50 nm, thus is suitable for different circumstances.

Description

technical field [0001] The invention relates to a preparation method of a rare earth luminescent material, in particular to a preparation method of a red luminescent material activated by rare earth europium. Background technique [0002] Alkaline earth metal sulfides excited by rare earth divalent europium are very good red luminescent materials. The usual preparation method is to use alkaline earth sulfate as raw material. 2 S or H 2 S and H 2 It is prepared under the atmosphere of mixed gas, but this process is more complicated, the production cost is high, and H 2 S is highly toxic to the human body. Contents of the invention [0003] The technical problem to be solved in the present invention is to provide a preparation method of calcium sulfide or alkaline earth sulfide red luminescent material activated by rare earth europium, aiming to solve the above-mentioned defects. [0004] In order to solve the problems of the technologies described above, the present inv...

Claims

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Application Information

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IPC IPC(8): C09K11/84
Inventor 胡学芳
Owner 上海宝鼎机械设备有限公司
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