CN109354417B - NaTbF is separated out4Nanocrystalline germanosilicate microcrystalline glass and preparation method thereof - Google Patents

NaTbF is separated out4Nanocrystalline germanosilicate microcrystalline glass and preparation method thereof Download PDF

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CN109354417B
CN109354417B CN201811563087.8A CN201811563087A CN109354417B CN 109354417 B CN109354417 B CN 109354417B CN 201811563087 A CN201811563087 A CN 201811563087A CN 109354417 B CN109354417 B CN 109354417B
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CN109354417A (en
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黄立辉
赵静涛
赵士龙
徐时清
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Zhejiang Zhiduo Network Technology Co ltd
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China Jiliang University
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    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C10/00Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
    • C03C10/16Halogen containing crystalline phase
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00Other methods of shaping glass
    • C03B19/02Other methods of shaping glass by casting molten glass, e.g. injection moulding

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Abstract

The invention discloses a method for separating out NaTbF4Nanocrystalline germanosilicate glass ceramics and a preparation method thereof. The microcrystalline glass comprises the following components in percentage by mole: GeO2:20~50%、SiO2:15~35%、Al2O3:5~10%、Na2CO3:10~15%、TbF33-10% and 15-20% of NaF. The preparation method of the microcrystalline glass comprises the following steps: weighing a certain mass of raw materials according to the mol percentage, fully grinding and uniformly mixing, and preparing the base glass by adopting a melting quenching method. Obtaining the thermal property of the base glass by adopting a differential thermal analysis test, and thermally treating the base glass for a plurality of hours in a crystallization temperature range to obtain the glass containing NaTbF4Nanocrystalline germanosilicate glass-ceramics. The microcrystalline glass prepared by the invention has simple preparation method, and single beta-phase NaTbF is precipitated4Crystalline phase and has high transparency.

Description

NaTbF is separated out4Nanocrystalline germanosilicate microcrystalline glass and preparation method thereof
Technical Field
The invention relates to the technical field of rare earth luminescent materials, in particular to a method for separating out NaTbF4Nanocrystalline germanosilicate glass ceramics and a preparation method thereof.
Background
Microcrystalline glass, a new material with complementary advantages of combining microcrystal grains and a glass matrix, has led researchers in the field of functional glass and ceramics to make extensive research. In recent years, oxyfluoride microcrystalline glass is favored as a novel microcrystalline glass, in which rare earth-doped oxyfluoride glass is embedded in an oxide glass matrix to form fluoride nano-crystallites under a certain heat treatment condition, and rare earth ions are preferentially concentrated in the fluoride crystallites. The glass with the structure not only keeps the excellent physical and chemical properties of the oxide, but also provides a lower phonon energy environment for rare earth ions by the generation of the fluoride nano-microcrystal, thereby enhancing the luminous efficiency. The crystallite size of the microcrystallized glass is smaller, generally dozens of nanometers, and the scattering phenomenon of energy loss is effectively reduced due to the fact that the matched refractive index exists between the microcrystals and the glass matrix, so that the microcrystalline glass still keeps higher transmittance.
Terbium ion (Tb)3+) The transition mode belongs to a typical 4f-4f energy level transition mode, and compared with other rare earth elements, the rare earth element has high quenching concentration and strong light emission. Due to Tb3+The 4f electron layer is protected by the outer layer orbit, so that the influence of the external environment is small, and meanwhile, the energy level difference between the 4f electron layer is small, so Tb is3+The energy transfer efficiency of (2) is high, and the fluorescence spectrum shows a sharp line shape. Tb3+The fluorescence has longer decay time, generally in the millisecond level, so the fluorescence can be applied to the detection of slow events, in addition, the fluorescence has stronger capability of bearing high-energy rays and shows stronger green light emission, and can be used for high-energy ray conversion and the like.
The research of the rare earth doped microcrystalline glass is relatively extensive. Generally, after rare earth doped glass is prepared, rare earth ions are preferentially enriched into a fluoride crystal phase through heat treatment, and the rare earth ions serving as a luminescence center are not part of the crystal phase generally. Since the radius of the luminescent ion is usually different from the lattice constant or ionic radius of the crystal phase, it is easy to control whether the luminescent ion is totally incorporated into the crystal phase or the crystal lattice is distorted. Therefore, the luminescent rare earth ions can be controlled to be part of the crystal lattice, and the problem that whether the rare earth ions enter the crystal phase or not does not need to be considered, but the crystal phase exists, namely the rare earth ions are in the crystal phase, so that the optical quality (transparency and the like) of the glass ceramics can be greatly improved. The lattice sites occupied by the rare earth ions in the beta-phase rare earth tetrafluoride are stable, and the luminous efficiency is higher. Therefore, the beta-phase NaTbF can be precipitated in the glass4Obtained to have Tb3+The microcrystalline glass has higher luminous efficiency.
Disclosure of Invention
The invention aims to solve the technical problem of providing a NaTbF-containing material4A novel fluorine oxygen germanium silicate microcrystalline glass of nano crystal and a preparation method thereof. Preparation process of microcrystalline glassSimple and separate out single beta-phase NaTbF4Crystalline phase and the microcrystalline glass has high transparency. The specific technical scheme is as follows:
NaTbF is separated out4The nanocrystalline germanosilicate microcrystalline glass is prepared from the following raw materials in percentage by mol: GeO2: 20~50%,SiO2: 15~35%,Al2O3: 5~10%,Na2O: 10~15%,TbF3: 3~10%,NaF: 15~20%。
Another object of the present invention is to provide a method for precipitating NaTbF4The preparation method of the novel oxyfluoride germanosilicate microcrystal of the nanocrystalline specifically comprises the following steps:
1) preparing materials: with GeO2,SiO2,Al2O3,Na2CO3,TbF3NaF is a glass composition raw material, and the raw materials with corresponding mass are weighed according to the selected mole percentage of the glass composition and are ground and mixed uniformly in a mortar;
2) melting: pouring the glass raw materials which are ground and mixed uniformly into a crucible, and putting the crucible into a silicon carbide rod electric furnace for melting, wherein the melting temperature is 1450-1550 ℃, and the melting time is 30-60 minutes;
3) molding: pouring the glass melt into a mold preheated to 450-550 ℃;
4) annealing: putting the formed glass into a muffle furnace for annealing at the temperature of 450-550 DEG CoAnd C, annealing for 2-4 hours. Then, a power supply of the muffle furnace is closed and cooled to room temperature along with the furnace;
5) and (3) heat treatment: putting the annealed initial glass into a muffle furnace, and carrying out crystallization at a crystallization temperature range (590-700℃)oC) Heat treatment for several hours;
6) polishing: and cutting, grinding and polishing the heat-treated glass to prepare the microcrystalline glass with the thickness of 10mm by 1.5 mm.
Drawings
Fig. 1 is an XRD pattern of the glass ceramics prepared in example 1 provided by the present invention.
Detailed Description
The invention will be further explained with reference to the drawings.
Example 1:
according to the composition: 30GeO2-25SiO2-8Al2O312Na2CO3-6TbF3-19NaF (mol%) the desired GeO is weighed out in a total mass of 20 g2、SiO2、Al2O3、Na2CO3、TbF3And the NaF powder raw material is put into an agate mortar to be fully ground and uniformly mixed. Pouring the uniformly mixed glass raw materials into a crucible, covering with a mullite cover, and placing at 1450oMelting for 40 minutes in a C silicon carbide rod electric furnace, and then quickly pouring the glass melt into a preheating furnace of 450 DEG CoC in the mold, after the glass is formed, the glass is turned into 550oAnd C, annealing for 2 hours in a muffle furnace, and naturally cooling to room temperature to obtain the base glass. The base glass obtained is placed in a muffle furnace at 10oThe temperature rise rate of C/min is increased to 610oC, preserving the heat for 2 hours to obtain the product containing NaTbF4Nanocrystalline germanosilicate glass-ceramics. And cutting, grinding and polishing the obtained glass ceramics to prepare the glass ceramics with the thickness of 10mm by 1.5 mm.
In this example, a composition containing NaTbF4XRD of nanocrystalline germanosilicate microcrystalline glass is shown in fig. 1.
Example 2:
according to the composition: 40GeO2-20SiO2-5Al2O3-15Na2CO3-4TbF315NaF (mol%) the desired GeO was weighed out in a total mass of 20 g2、SiO2、Al2O3、Na2CO3、TbF3And the NaF powder raw material is put into an agate mortar to be fully ground and uniformly mixed. Pouring the uniformly mixed glass raw materials into a crucible, covering a mullite cover, and placing at 1460oMelting for 45 minutes in a C silicon carbide rod electric furnace, and then quickly pouring the glass melt into a preheating 480oC in the mold, after the glass is formed, the glass is turned into 550oAnd C, annealing for 2 hours in a muffle furnace, and naturally cooling to room temperature to obtain the base glass. The base glass obtained is placed in a muffle furnace at 10oThe temperature rise rate of C/min is increased to 630oC, keeping the temperature for 2 hours to obtainTo contain NaTbF4Nanocrystalline germanosilicate glass-ceramics. The obtained glass ceramics are cut, ground and polished to be made into 10mm 1.5 mm.
Example 3:
according to the composition: 50GeO2-20SiO2-7Al2O3-13Na2CO3-5TbF315NaF (mol%) the desired GeO was weighed out in a total mass of 20 g2、SiO2、Al2O3、Na2CO3、TbF3And the NaF powder raw material is put into an agate mortar to be fully ground and uniformly mixed. Pouring the uniformly mixed glass raw materials into a crucible, covering a mullite cover, and placing the crucible at 1500 DEG CoMelting for 60 minutes in a C silicon carbide rod electric furnace, and then rapidly pouring the glass melt into a preheating furnace 500oC, in the mold, the glass is turned into 520 after being formedoAnd C, annealing for 3 hours in a muffle furnace, and naturally cooling to room temperature to obtain the base glass. The base glass obtained is placed in a muffle furnace at 10oThe temperature rise rate of C/min is increased to 650oC, preserving the heat for 1.5h to obtain the NaTbF-containing material4Nanocrystalline germanosilicate glass-ceramics. And cutting, grinding and polishing the obtained glass ceramics to prepare the glass ceramics with the thickness of 10mm by 1.5 mm.
Example 4:
according to the composition: 30GeO2-30SiO2-5Al2O3-10Na2CO3-5TbF3-20NaF (mol%) the desired GeO is weighed out in a total mass of 20 g2、SiO2、Al2O3、Na2CO3、TbF3And the NaF powder raw material is put into an agate mortar to be fully ground and uniformly mixed. Pouring the uniformly mixed glass raw materials into a crucible, covering the crucible with a mullite cover, and placing the crucible at 1550 DEGoMelting for 35 minutes in a C silicon carbide rod electric furnace, and then quickly pouring glass melt into a preheating chamber 510oC in the mold, after the glass is formed, the glass is transferred into a mold 540oAnd C, annealing for 3 hours in a muffle furnace, and naturally cooling to room temperature to obtain the base glass. The base glass obtained is placed in a muffle furnace at 10oThe temperature rise rate of C/min is increased to 670oC, preserving the heat for 1.5h to obtain the NaTbF-containing material4Nanocrystalline germanosilicate glass-ceramics. And cutting, grinding and polishing the obtained glass ceramics to prepare the glass ceramics with the thickness of 10mm by 1.5 mm.
The above-described embodiments are intended to illustrate rather than to limit the invention, and any modifications and variations of the present invention are within the spirit of the invention and the scope of the appended claims.

Claims (1)

1. NaTbF is separated out4The preparation method of the nanocrystalline germanosilicate glass ceramics comprises the following raw materials in percentage by mol:
the component mol%
GeO2 20~50%
SiO2 15~35%
Al2O3 5~10%
Na2CO3 10~15%
TbF3 3~10%
NaF 15~20%;
The method is characterized by comprising the following steps:
1) preparing materials: with GeO2,SiO2,Al2O3,Na2CO3,TbF3The NaF is a glass composition raw material, and the raw materials with corresponding mass are weighed according to the selected mole percentage composition of the glass raw material and are ground and mixed uniformly in a mortar;
2) melting: pouring the glass raw material which is ground and mixed uniformly into a crucible, and putting the crucible into a silicon carbide rod electric furnace for melting, wherein the melting temperature is 1450-1550 DEG CoC, melting time is 30-60 minutes;
3) molding: pouring the glass melt into a preheating furnace with the temperature of 450-550 DEG CoC in the mold;
4) annealing: glass to be shapedPutting the mixture into a muffle furnace for annealing at the temperature of 450-550 DEG CoC, annealing for 2-4 hours, and then closing a power supply of the muffle furnace to cool to room temperature along with the furnace;
5) and (3) heat treatment: at a crystallization temperature of 590-700 deg.Co590-700 of C rangeoC, carrying out heat treatment for several hours;
6) polishing: and cutting, grinding and polishing the heat-treated glass to prepare the microcrystalline glass with the thickness of 10mm by 1.5 mm.
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CN112010564B (en) * 2020-08-25 2022-04-22 暨南大学 Rare earth ion in-situ crystallization-based fluorine-oxygen microcrystalline glass and preparation method and application thereof
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CN1239936A (en) * 1997-01-02 1999-12-29 康宁股份有限公司 Transparent oxyfluoride glass-ceramic composition and process for making the same
CN101234852A (en) * 2008-01-16 2008-08-06 中南大学 0.3-5mum wave range infrared permeation high temperature resistant glass ceramic material and preparing method thereof
CN102603194A (en) * 2011-12-22 2012-07-25 中国计量学院 Rare earth doped microcrystalline glass of precipitated beta-NaGdF4 nanocrystalline and preparation method thereof
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CN101234852A (en) * 2008-01-16 2008-08-06 中南大学 0.3-5mum wave range infrared permeation high temperature resistant glass ceramic material and preparing method thereof
CN102603194A (en) * 2011-12-22 2012-07-25 中国计量学院 Rare earth doped microcrystalline glass of precipitated beta-NaGdF4 nanocrystalline and preparation method thereof
CN102992630A (en) * 2012-12-12 2013-03-27 中国科学院福建物质结构研究所 Nano-structure glass ceramic with up / down conversion luminescent property and preparation method thereof
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