Inorganic aluminate luminescent microcrystalline glass and preparation method thereof

A glass-ceramic and aluminate technology, applied in the field of luminescent materials and lighting engineering, can solve the problems of easy aging and low stability of phosphors, and achieve the effects of stable and reliable process conditions, stable physicochemical properties, and pure luminous color.

Inactive Publication Date: 2012-06-27
OCEANS KING LIGHTING SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an inorganic phosphor with a wide excitation spectrum in the blue light range, pure luminous chromaticity, and stable physical and chemical properties, aiming at the problems of easy aging and low stability of phosphor powder in the prior art. Aluminate luminescent glass-ceramics

Method used

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  • Inorganic aluminate luminescent microcrystalline glass and preparation method thereof
  • Inorganic aluminate luminescent microcrystalline glass and preparation method thereof
  • Inorganic aluminate luminescent microcrystalline glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 19.52g of strontium carbonate, 10.11g of alumina, 5.95g of silicon dioxide and 0.22g of praseodymium oxide, and grind the above raw materials by ball mill or mortar to obtain uniform powder. Put the ground raw material into an alumina crucible, place it at 1600°C for 30 minutes, and keep the raw material in a molten state. Pour the molten raw material onto a stainless steel plate, quench and form it, and make glass. Heat-treat the formed glass at 1100°C for 8 hours in a hydrogen reducing atmosphere to obtain 40SrO-30Al 2 o 3 -30SiO 2 -0.2Pr 2 o 3 Microcrystalline glass.

[0026] The glass-ceramics obtained in this example can be excited by visible light in the wavelength range of 430-475nm. Under the excitation of blue-violet light at 437nm, the glass-ceramic of this example shows blue-green light emission. Such as figure 1 As shown, the glass-ceramic excitation wavelength range of this embodiment is 430-475nm, such as figure 2 As shown, the emission wavel...

Embodiment 2

[0028] Weigh 17.11 g of strontium carbonate, 11.82 g of aluminum oxide, 5.97 g of silicon dioxide and 0.19 g of praseodymium oxide, and grind the above raw materials by ball mill or mortar to obtain uniform powder. Put the ground raw material into an alumina crucible, place it at 1620°C for 30 minutes, and keep the raw material in a molten state. Pour the molten raw material onto a stainless steel plate, quench and form it, and make glass. The formed glass is heat-treated at 1150°C for 10 hours in a carbon monoxide reducing atmosphere to obtain 35SrO-35Al 2 o 3 -30SiO 2 -0.175Pr 2 o 3 Microcrystalline glass.

[0029] The glass-ceramics obtained in this example can be excited by visible light in the wavelength range of 430-475nm. Under the excitation of blue-violet light at 445nm, the glass-ceramics of this example presents a blue-green luminescent color. Such as image 3 As shown, the glass-ceramic excitation wavelength range of this embodiment is 430-475nm, such as Fi...

Embodiment 3

[0031] Weigh 17.07g of strontium carbonate, 11.79g of aluminum oxide, 5.95g of silicon dioxide and 0.25g of praseodymium oxide, and grind the above raw materials by ball mill or mortar to obtain uniform powder. Put the ground raw material into an alumina crucible, place it at 1600°C for 30 minutes, and keep the raw material in a molten state. Pour the molten raw material onto a stainless steel plate, quench and form it, and make glass. Put the formed glass in a hydrogen reducing atmosphere and heat treat it at 800°C for 10 hours to obtain 35SrO-35Al 2 o 3 -30SiO 2 -0.23Pr 2 o 3 Microcrystalline glass.

[0032] The glass-ceramics obtained in this embodiment can be excited by visible light in the wavelength range of 425-475nm. Under the excitation of 441nm blue-violet light, the luminescent color of the glass-ceramic of this embodiment is blue-green. Such as Figure 5 As shown, the glass-ceramic excitation wavelength range of this embodiment is 425-475nm, such as Figure...

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Abstract

The invention discloses inorganic aluminate luminescent microcrystalline glass and a preparation method thereof. The inorganic aluminate luminescent microcrystalline glass is a substance shown as a chemical formula, namely, X SrO-Y Al2O3-Z SiO2-R Pr2O3, wherein X, Y, Z and R are molar fractions; X is more than or equal to 25 and less than or equal to 40; Y is more than or equal to 25 and less than or equal to 40; Z is more than or equal to 25 and less than or equal to 50; and R is more than or equal to 0.1 and less than or equal to 2. The preparation method comprises the following steps of: grinding strontium carbonate, alumina, silicon dioxide and praseodymium oxide serving as raw materials and mixing; fusing at the temperature of between 1,550 and 1,650 DEG C and molding the raw materials to obtain glass; and thermally treating the molded glass at the temperature of between 800 and 1,150 DEG C in a reducing atmosphere for 8 to 12 hours so as to obtain the inorganic aluminate luminescent microcrystalline glass. The inorganic aluminate luminescent microcrystalline glass has a relatively wide excitation spectrum in a blue light range, pure luminescent chromaticity, a stable physical property, a simple preparation method and low cost.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials and lighting engineering, and relates to a luminescent material and a preparation method thereof, in particular to an inorganic aluminate luminescent glass-ceramic and a preparation method thereof. The light-emitting material can be applied to semiconductor light-emitting diodes (LEDs). Background technique [0002] With the rapid development of optoelectronic technology, luminescent materials are more and more widely used in light emitting devices and display devices. At present, the luminescent material used in lighting devices and display devices is mainly phosphor powder, but in the actual application process, it is found that phosphor powder has problems such as easy aging and low stability, which greatly reduces the service life of lighting devices and display devices. Contents of the invention [0003] The technical problem to be solved by the present invention is to provid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00C03C4/12
Inventor 周明杰李清涛马文波时朝璞乔延波
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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