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Method for manufacturing high-silica glass emitting white light

A high-silica glass, a manufacturing method technology, applied in the field of luminescent glass manufacturing, can solve the problem that the high-silica glass can only be excited by ultraviolet light below 300nm, etc.

Active Publication Date: 2013-03-27
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention provides a method for manufacturing high-silica glass that emits white light, which solves the problem that the existing high-silica glass can only be excited by ultraviolet light below 300nm, so as to realize blue-ultraviolet light by using mainstream blue-ultraviolet light LED products. White luminescence of high silica glass excited by light (320nm~380nm)

Method used

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  • Method for manufacturing high-silica glass emitting white light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 6.24g of cerium nitrate, 14.36g of terbium nitrate, 5.03g of manganese chloride and 67.5g of aluminum nitrate are dissolved in 100ml of 3N dilute nitric acid solution. In this mixed solution, the concentration of cerium ions is 0.15mol / L and the concentration of terbium ions 0.33mol / L, manganese ion concentration 0.4mol / L, aluminum ion concentration 1.8mol / L. A porous glass having a size of 10 mm×10 mm×1.5 mm, a pore size of 5 nm to 10 nm, and a silica content of 94% by weight was immersed in the mixed solution for 2 hours.

[0031] The glass was then removed from the solution and allowed to air dry naturally.

[0032] After the glass is completely dry, place it in a sintering furnace covered with carbon powder, and then heat up according to the following temperature regime:

[0033] 90 minutes from room temperature to 100 degrees Celsius, and then 120 minutes at 100 degrees Celsius. The temperature is raised from 100 degrees Celsius to 600 degrees Celsius in 150 minu...

Embodiment 2

[0036] 6.24g of cerium nitrate, 14.36g of terbium nitrate, 5.03g of manganese chloride and 37.5g of aluminum nitrate are dissolved in 100ml of 3N dilute sulfuric acid solution. In this mixed solution, the concentration of cerium ions is 0.15mol / L and the concentration of terbium ions 0.33mol / L, manganese ion concentration 0.4mol / L, aluminum ion concentration 1.0mol / L. A porous glass having a size of 10 mm x 10 mm x 1.5 mm, a pore size of 1 nm to 8 nm, and a silica content of 96% by weight was immersed in the solution for 2 hours.

[0037]The glass was then removed from the solution to air dry naturally.

[0038] After the glass is completely dry, it is placed in a sintering furnace filled with argon, and then the temperature is raised according to the following temperature regime:

[0039] 175 minutes from room temperature to 200 degrees Celsius, then 120 minutes at 200 degrees Celsius. The temperature is raised from 200 degrees Celsius to 750 degrees Celsius in 160 minutes,...

Embodiment 3

[0041] 6.24g of cerium nitrate, 14.36g of terbium nitrate, 5.03g of manganese chloride, 41.5g of lanthanum nitrate, 7.02g of barium nitrate and 48.75g of aluminum nitrate are dissolved in 100ml of 3N dilute hydrochloric acid solution. In this mixed solution, cerium ions Concentration is 0.15mol / L, terbium ion concentration is 0.33mol / L, manganese ion concentration is 0.4mol / L, lanthanum ion concentration is 1.0mol / L, barium ion concentration is 0.2mol / L, aluminum ion concentration is 1.3mol / L L. A porous glass having a size of 10 mm×10 mm×1.5 mm, a pore size of 4 nm to 20 nm, and a silica content of 98% by weight was immersed in the solution for 2 hours.

[0042] The glass was then removed from the solution to air dry naturally.

[0043] After the glass is completely dry, place it in a sintering furnace filled with nitrogen, and then heat up according to the following temperature regime:

[0044] 175 minutes from room temperature to 200 degrees Celsius, then 120 minutes at 2...

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Abstract

The invention provides a method for manufacturing high-silica glass emitting white light. The method comprises the following steps of: firstly, soaking porous glass into a mixed solution containing doped ions, wherein the doped ions comprise cerium ions, terbium ions, manganese ions and other metal ions, and the mixed solution has the cerium ion concentration of 0.08-0.3mol / L, the terbium ion concentration of 0.15-0.5mol / L, the manganese ion concentration of 0.2-0.7mol / L and the concentration of other metal ions of 0.2-2.5mol / L; then drying the soaked porous glass; and finally, arranging the porous glass into a nonoxidative atmosphere and sintering at 1,050-1,200 DEG C to obtain the high-silica glass emitting white light. The absorption waveband of the glass manufactured according to the method can be expanded to a blue and violet light area, and a blue and violet light LED based on an InGaN material can be used as a mercury-free excitation source which is harmless to human bodies and environment to excite the glass to emit white light.

Description

technical field [0001] The invention relates to a method for manufacturing luminescent glass, in particular to a method for manufacturing high-silica glass that emits white light when excited by blue-ultraviolet light. Background technique [0002] For a long time, traditional lighting and display materials are based on the 254nm ultraviolet light generated by exciting mercury vapor to excite the fluorescent material on the inner wall of the lamp tube to emit light. Mercury itself will cause serious environmental pollution, and 254nm ultraviolet light is also harmful to the human body itself. Since the beginning of the 21st century, global environmental protection has faced increasing pressure, and lighting and display materials using mercury will inevitably be eliminated in the future. In the 1990s, with the technological breakthrough of blue LEDs based on InGaN materials, in 1996 Nichia invented blue LEDs and YAG phosphors ((Y, Gd) 3 al 5 o 12 : Ce 3+ ) combination of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C4/12
Inventor 杨旅云刘自军李进延戴能利彭景刚蒋作文李海清
Owner HUAZHONG UNIV OF SCI & TECH
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