Preparation method of vanadium boric acid gadolinium thulium blue luminescent material with modification of glucose

Abstract

The invention provides a preparation method of a vanadium boric acid gadolinium thulium blue luminescent material with modification of glucose. The method comprises the following steps: (1) with basic raw materials of metavanadic acid ammonia, nitric acid gadolinium, thulium nitrate, boric acid, citric acid and a modifier of glucose, adding metavanadic acid ammonia and boric acid into a containerand adding deionized water into the container to form a solution which is defined as A solution, adding nitric acid gadolinium, thulium nitrate and citric acid into a container and adding deionized water into the container to form a solution which is defined as B solution, adding A solution into B solution, adding glucose with stirring to mix the above mixture uniformly to form sol, with dilute nitric acid adjusting pH value of the sol to a range of larger than or equal to 4 and less than or equal to 10, stirring the sol at a temperature of 60-80 DEGC continuously to form gel, and drying the gel to obtain precursor; (2) grinding and dispersing the precursor, roasting the above resultant at a temperature of 700-900 DEG C for 1-4 hours, and taking the above resultant out for air cooling; (3) grinding and dispersing the roasting product, cleaning the above resultant, and drying powder after cleaning.

Description

technical field [0001] The invention belongs to the field of luminescent materials, and in particular relates to a preparation method of a rare earth blue luminescent material. Background technique [0002] Rare earth vanadate luminescent materials have high thermal and chemical stability, especially under vacuum ultraviolet irradiation, they have stable luminous efficiency, high absorption band and high energy transfer efficiency, and are mainly used in fluorescent materials in the field of PDP and FED and high-voltage Powder material for mercury lamps. At present, the most researched and commonly used rare earth vanadate luminescent material is YVO 4 : Eu red luminescent material, and then adopt the red luminescent material modified by adding P, Gd and other elements on its basis, such as Chinese patent (application number 200310115899.3) discloses a kind of rare earth vanadium yttrium gadolinium phosphate red luminescent material obtained by solid phase calcination Mate...

AI Technical Summary

Problems solved by technology

There are few blue luminescent materials, and the blue luminescent powder on the market is mainly Eu 2+ Activated aluminate phosphors such as BaMgAl 10 o 17 :Eu 2 + (BAM), which is the blue powder used more in compact fluorescent lamps at present, the heating process of the powder takes a long time, ultraviolet radiation and ion bombardment are easy to cause aging, resulting in reduced luminous performance

In addition, this finished blue powder needs to be produced in a reducing atmosphere, and sometimes the luminous intensity will be reduced due to insufficient reduction

In addition, the raw material of the activator Eu is high-purity Eu 2 o 3 , high product cost

Hu Bin et al disclosed a method to prepare GdVO by sol-gel method 4 : The method and luminescent properties of the blue luminescent material of Tm (see Rare Metal Materials and Engineering, 37(1), 176-179), but the size uniformity of the luminescent powder particles prepared by this method is poor, and the shape is irregular , which will affect the luminous intensity

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