Preparation method of (Zn<1-x>Mx)3V2O8

Abstract

The invention provides a preparation method of (Zn<1-x>Mx)3V2O8, and belongs to the field of vanadate luminescent material preparation. According to the preparation method, M represents a rare earth element, and when x is equal to 0, ZnO, V2O5 and ZnCl2 are taken to be mixed to be uniform sequentially according to the mole ratio of 3:1:(1-3) and then put under the condition that the temperature ranges from 580 DEGC to 620 DEG C to react for 3.5 hours to 4.5 hours; when x is larger than 0 and smaller than or equal to 0.1, ZnO, V2O5, ZnCl2 and an oxide of M are taken to be mixed to be uniform according to the proportion that the total molar weight of ZnO and M to the molar weight of V2O5 to the molar weight of ZnCl2 is 3:1:(1-3) and then put under the condition that the temperature ranges from 580 DEGC to 620 DEG C to react for 3.5 hours to 4.5 hours. Therefore, the problems that due to the fact that existing Zn3V2O8 fluorescent powder generally contains certain impurities, the luminescent property of the Zn3V2O8 fluorescent powder is greatly affected, and the quantum efficiency is low; in addition, the existing fluorescent powder is high in preparation temperature and long in preparation period are solved.

Description

technical field [0001] The invention relates to a preparation method of vanadate fluorescent powder for white light LEDs, and belongs to the technical field of preparation of luminescent materials. Background technique [0002] Zn 3 V 2 o 8 It is a very popular multi-functional material at present. It has a wide range of uses and can be used as phosphors, photocatalysts, and lithium-ion battery negative electrodes. Its current most widely used is as phosphors for LEDs, but in this phosphor During the preparation process of V, since V has a variety of price changes, it can form a variety of compounds with different price positions at different temperatures. The price change is very complicated, and it is difficult to obtain pure phosphors. Generally, there are certain impurities, and the impurities are mainly zinc oxide. and other non-luminescent zinc vanadium oxides, and zinc oxide is extinction, zinc oxide and other zinc vanadium oxides will greatly affect Zn 3 V 2 o ...

AI Technical Summary

Problems solved by technology

[0002] Zn 3 V 2 o 8 It is a very popular multi-functional material at present. It has a wide range of uses and can be used as phosphors, photocatalysts, and lithium-ion battery negative electrodes. Its current most widely used is as phosphors for LEDs, but in this phosphor During the preparation process of V, since V has a variety of price changes, it can form a variety of compounds with different price positions at different temperatures. The price change is very complicated, and it is difficult to obtain pure phosphors. Generally, there are certain impurities, and the impurities are mainly zinc oxide. and other non-luminous zinc vanadium oxides, and zinc oxide is extinction, zinc oxide and other zinc vanadium oxides will greatly affect Zn 3 V 2 o 8 luminous performance, which leads to the quantum efficiency of the best zinc vanadium oxide phosphor is only about 51%, at the same time, the time required for the preparation reaction is longer

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