A kind of nitrogen oxide green fluorescent powder and preparation method thereof

Abstract

The invention discloses nitrogen oxide green fluorescent powder and a preparation method thereof. The chemical general formula of the nitrogen oxide green fluorescent powder is [M(1-x)Eux]3Al2-ySiyO(6-y)Ny, wherein M is one or more of Ca, Sr and Ba, x is more than 0 and less than or equal to 0.1, and y is more than or equal to 0.8 and less than or equal to 1.8. The fluorescent powder is prepared by a high-temperature solid-phase method or sol-gel method. The nitrogen oxide green fluorescent powder has a wide excitation range, has a relatively strong excitation peak from ultraviolet light to blue light region, and can emit bright green light under excitation of ultraviolet light and blue light, so that the fluorescent powder has potential application values in lighting and displaying aspects. The preparation method is simple in process flow, and the synthesized rare earth europium ion doped nitrogen oxide material has a good lighting effect.

Description

technical field [0001] The invention belongs to the technical field of fluorescent powder for excitation from ultraviolet light to blue light, and discloses a nitrogen oxide green fluorescent powder and a preparation method thereof. Background technique [0002] Nitride phosphor has been widely concerned since its inception. The anionic group of this type of fluorescent substance contains highly negatively charged N 3- , the electron cloud expansion effect makes its excitation spectrum move to the long-wave direction such as near ultraviolet and blue light, and can be excited by ultraviolet light and blue light in the range of 250~470nm to emit light. It has the characteristics of high efficiency, good safety performance, non-toxic, environmental protection, and the matrix has a tight network structure, and its physical and chemical properties are stable. At the same time, due to its wide excitation range, it has potential application value in lighting and display. [000...

AI Technical Summary

Problems solved by technology

After the PDP display gradually replaces the traditional CRT display, most of the phosphors used are inherited from fluorescent lamps, and the green phosphor is mainly Zn 2-x mn x SiO 4 and BaAl 12 o 19 :Mn 2+ , but the problem is that Zn 2-x mn x SiO 4 The afterglow time is too long

[0007] Nitride luminescent materials have high chemical stability and thermal stability, and are the preferred system for preparing green phosphors. However, judging from the developed phosphors, there is still room for further improvement in their properties.

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