Method for producing gadolinium vanadate thulium blue luminescent material modified by glucose

Abstract

The invention relates to a method for producing a gadolinium vanadate thulium blue luminescent material modified by glucose, and the method comprises the following steps: (1) taking ammonia metavanadate, gadolinium nitrate, thulium nitrate and citric acid as the basic raw materials, taking glucose as a modifier, putting ammonia metavanadate in a container and adding deionized water, defining the produced solution as a solution A, putting gadolinium nitrate, thulium nitrate and citric acid into the container and adding deionized water, defining the produced solution as a solution B, adding thesolution A into the solution B, then adding glucose and uniformly mixing to form sol, regulating the pH value of sol to: 4<=pH<=10, continuously stirring at the temperature of 60 DEG C - 80 DEG C until gel is formed, then drying the gel to obtain a precursor; (2) grinding and dispersing the precursor, calcinating at the normal pressure of 700 DEG C - 900 DEG C for 1 - 4 hours, then taking out andair cooling; (3) grinding and dispersing the calcinated products, then cleaning, drying the cleaned powder to obtain the gadolinium vanadate thulium blue luminescent material modified by glucose.

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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