Preparation method and luminescent glass capable of efficiently extracting size-controllable Ag nano particles under low-concentration AgNO3 doping condition

Abstract

The invention discloses a preparation method and luminescent glass capable of efficiently extracting size-controllable Ag nano particles under a low-concentration AgNO3 doping condition. The luminescent glass is prepared from the following components in mole ratio: 60-70% of SiO2, 4-14% of B2O3, (18-x)% of X2O (X=Li / Na / K), x% of XF (X=Li / Na / K), y% of MF2 (M=Ca / Sr / Ba), (8-y)% of RF3 (R=Y / Gd) and 0.01-0.5% of Ag, wherein x is greater than zero and not greater than 1 and y is not smaller than zero and not greater than 6. The preparation method comprises the steps: firstly, weighing raw materials according to the mole ratio; secondly, smelting a sufficiently ground and uniformly mixed batch in the air; finally, pressing, molding and annealing, thereby obtaining glass containing Ag nano particles. The luminescent glass containing Ag nano particles has the characteristics of low initial AgNO3 doping content, adjustable size distribution of extracted Ag nano particles and no complex thermal treatment process; smelting and annealing are carried out in the air; cost is low and the luminescent glass has no pollution to the environment.

Description

technical field [0001] The invention relates to transparent luminescent glass, in particular to a low-concentration AgNO 3 A luminescent glass capable of effectively precipitating scale-controllable Ag nanoparticles under doping and a preparation method thereof. Background technique [0002] Nano-metal particles have unique physical and chemical properties such as quantum size effect and surface effect. Combining these metal nanoparticles with other types of materials can endow materials with new functions. Glass materials have excellent characteristics such as adjustable composition properties and stable chemical and physical properties, especially their excellent processing characteristics, such as being able to be processed into arbitrary block shapes, optical fibers, ultra-thin plates, etc., endowing glass materials with a wide range of applications. The combination of nano metal particles and glass materials has broad application prospects in the fields of communicatio...

AI Technical Summary

Problems solved by technology

After the ion exchange process is completed, it still takes a long time (2-48h) heat treatment to precipitate Ag nanoparticles in the glass substrate. The preparation process of this method is complicated, and many control factors are required, and Ag nanoparticles are only precipitated on the glass surface. The overall distribution of the material is uneven, which greatly limits its application range

[0005] In order to solve the problems in the above method, it is reported in the literature that the heat treatment is carried out in a reducing atmosphere, and the reducing atmosphere is beneficial to the Ag in the glass matrix to a certain extent. + reduction, but the reducing atmosphere brings more stringent requirements and higher application costs to the preparation process

In addition, it has been reported in the literature that the introduction of Eu into the glass matrix 3+ It is beneficial to the precipitation of Ag nanoparticles, and the effect is remarkable, but the rare earth ion Eu 3+ It can emit light itself, which is not conducive to the design of other optical devices with specific requirements

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