Vacuum ultraviolet induced high colour purity red phosphor and preparation method thereof

Abstract

The invention provides vacuum ultraviolet induced high colour purity red phosphor. The concrete chemical formula of phosphor is as follows: M (1plus x) M' (1 minus 2x) BP208: Eux, wherein x is more than 0 and less than or equal to 0.3, M is one or several of Li, Na and K, and the M' is one or several of Ba, Sr and Ca. The invention also provides a method for preparing the red phosphor, comprising the following steps: firstly, weighing corresponding raw materials according to the weight ratio expressed in the chemical formula; secondly, carrying out high-temperature roasting on the raw materials and rinsing coasted materials; and thirdly, carrying out separation, filtration, size grading and drying on the rinsed materials to obtain the vacuum ultraviolet induced high colour purity red phosphor having good colour purity and stable chemical property.

Description

technical field

[0001] The invention relates to a fluorescent powder excited by vacuum ultraviolet light and a preparation method thereof, in particular to a red component in a three-primary-color fluorescent powder used in a plasma display panel. Background technique

[0002] At present, in the fierce market competition, the traditional cathode ray tube display has gradually declined, and it has been replaced by the flat panel display which is famous for its thin and light body, no X-ray radiation, and low power consumption. Among them, the display effect of plasma flat panel display is particularly outstanding, with the advantages of high contrast, good color reproduction, rich gray scale and fast response speed, etc., occupying an absolute advantage in the global large-screen TV market. The light emitting principle of the plasma display panel is to use inert gas such as Xe or Xe-He to discharge into a plasma state, radiate vacuum ultraviolet rays of 147nm and 172nm, and t...

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