Fluorescent glass ceramic based on low-melting-point glass powder and preparation method thereof

A technology of low-melting glass and fluorescent glass, which is applied in the field of special glass production and manufacturing, can solve the problems of PbO that is harmful to human health, thermal degradation of phosphor materials, and high light scattering loss, and achieve good structural stability and chemical stability. Effect of reducing light scattering loss and avoiding thermal deterioration

Active Publication Date: 2019-08-23
BINHAI IND RES INST OF TIANJIN UNIV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. Traditional low melting point fluorescent glass contains PbO, but PbO is more harmful to human health;
[0008] 2. The refractive index of traditional low-melting fluorescent glass does not match that of phosphor powder, resulting in high light scattering loss;
[0009] 3. The calcination temperature of traditional low-melting fluorescent glass is relatively high, which leads to thermal deterioration of phosphor materials at high temperatures

Method used

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  • Fluorescent glass ceramic based on low-melting-point glass powder and preparation method thereof
  • Fluorescent glass ceramic based on low-melting-point glass powder and preparation method thereof
  • Fluorescent glass ceramic based on low-melting-point glass powder and preparation method thereof

Examples

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Effect test

Embodiment 1

[0047] A preparation method of fluorescent glass ceramics, comprising the following steps:

[0048] 1) In terms of mass percentage, 70wt% of low-melting glass powder and 30wt% of phosphor powder (YAG: Ce 3+ Yellow fluorescent powder) after mixing, realize uniform mixing by ball milling for 4 hours to obtain a preliminary mixture, wherein ethanol is used as the medium of ball milling;

[0049] 2) Press the preliminary mixture obtained in step 1) into thin slices with a thickness of 2mm, the pressure of the pressed thin slices is 10MPa, and the thin slices are calcined in a microwave oven for 5 minutes to obtain fluorescent glass ceramics. The scanning calorimeter measures the phase transition temperature of the low-melting point glass powder to be 270°C, and the temperature of calcination in the microwave oven is 30°C higher than the phase transition temperature of the low-melting point glass powder (that is, the calcination temperature is 300°C);

[0050] Wherein, the prepara...

Embodiment 2

[0055] A preparation method of fluorescent glass ceramics, comprising the following steps:

[0056] 1) In terms of mass percentage, 90wt% of low-melting glass powder and 10wt% of phosphor powder (YAG: Ce 3+ Yellow fluorescent powder) after mixing, realize uniform mixing by ball milling for 5 hours to obtain a preliminary mixture, wherein ethanol is used as the medium of ball milling;

[0057] 2) Press the preliminary mixture obtained in step 1) into a thin slice with a thickness of 3 mm, the pressure of the pressed thin slice is 10 MPa, and the thin slice is calcined in a microwave oven for 10 minutes to obtain fluorescent glass ceramics. The phase transition temperature of the low-melting point glass powder measured by the calorimeter is 330°C, and the calcination temperature is 30°C higher than the phase transition temperature of the low-melting point glass powder, that is, the calcination temperature is 360°C;

[0058] Wherein, the preparation method of low melting point g...

Embodiment 3

[0061] A preparation method of fluorescent glass ceramics, comprising the following steps:

[0062] 1) In terms of mass percentage, 80wt% of low-melting glass powder (with a particle size of 3-10 microns) and 20wt% of fluorescent powder (CaAlSiN 3 : Eu 2+ Red fluorescent powder) after mixing, achieve uniform mixing by ball milling for 6 hours to obtain a preliminary mixture, wherein ethanol is used as the medium of ball milling;

[0063] 2) Press the preliminary mixture obtained in step 1) into a thin slice with a thickness of 2.5 mm, the pressure of the pressed thin slice is 14 MPa, and the thin slice is calcined in a microwave oven for 15 minutes to obtain a fluorescent glass ceramic, and the Q2000 differential scanning method of the American TA Instrument Company is adopted. The calorimeter measures the phase transition temperature of the low-melting point glass powder to be 370°C, and the calcining temperature is 30°C higher than the phase transition temperature of the lo...

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Abstract

The invention discloses a fluorescent glass ceramic based on low-melting-point glass powder and a preparation method thereof. The method includes the steps of: mixing SnCl2, P2O5, Na2O, a glass structure and a phase change adjustment component evenly, then performing melting at 300-800DEG C for 30-90min to obtain molten glass, placing the molten glass in a die for annealing to obtain transparent glass, crushing the transparent glass and conducting ball-milling to obtain the low-melting-point glass powder. The low-melting-point glass powder provided by the invention has a phase transition temperature of 270-500DEG C and a lower glass phase transition temperature. The low-melting-point glass powder not only has good structural stability and chemical stability, but also has a refractive indexmatching that of phosphor powder, and reduces light scattering loss.

Description

technical field [0001] The invention belongs to the technical field of special glass production and manufacturing, and specifically relates to a fluorescent glass ceramic based on low-melting glass powder and a preparation method thereof. Background technique [0002] Low-melting point glass refers to special glass whose glass transition temperature is significantly lower than ordinary glass, and can be widely used as sealing glass and remote phosphor. With the rapid development of the electronics industry, low melting point glass is widely used in the sealing and protection of electronic components and display devices, such as sealing vacuum fluorescent display (VFD), plasma display (PDP) and cathode ray tube (CRT) and other vacuum devices. At the same time, through structural encapsulation, low-melting glass combined with fluorescent materials can also be used in LED, laser semiconductor lighting and display and other fields. [0003] Most of the traditional low-melting-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C4/12C03C10/00C03C12/00
CPCC03C4/12C03C10/00C03C12/00
Inventor 王达健党星培毛智勇杨超田华陈静静
Owner BINHAI IND RES INST OF TIANJIN UNIV CO LTD
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