Borate microcrystalline glass and method for preparing same

A technology of glass-ceramic and borate, which is applied in the fields of optoelectronics and lighting engineering, can solve the problems of high production cost of light-emitting devices, unstable phosphor emission, and easy aging, and achieve good photoluminescence performance and good chemical stability and thermal stability, good light transmittance effect

Inactive Publication Date: 2012-09-05
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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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 that, in view of the defects of the prior art LED light-emitting devices that the epoxy resin encapsulating the LED is easy to age at high temperature, the fluorescent powder is unstable in emitting light in a high-temperature environment, and the manufacturing cost of the light-emitting device is high, a A borate glass-ceramic that can replace epoxy resin, has high luminous intensity, stable luminescence, and low cost

Method used

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  • Borate microcrystalline glass and method for preparing same
  • Borate microcrystalline glass and method for preparing same
  • Borate microcrystalline glass and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 1.57g of sodium carbonate, 3.35g of yttrium oxide, 5.51g of boric acid, 2.52g of aluminum oxide and 0.08g of cerium oxide, and obtain a uniform powder by ball milling or mortar grinding. Put the ground raw material into an alumina crucible, put it into a high-temperature furnace, and keep it at a high temperature of 1630°C for 30 minutes to melt it. After melting, the material is poured into a stainless steel plate, quenched and formed into glass. Place the shaped glass in N 2 with H 2 15Na 2 O-15Y 2 o 3 -25Al 2 o 3 -45B 2 o 3 -0.5CeO 2 (The coefficient in the chemical formula is the mole fraction of the component, the same below) borate glass-ceramics.

[0034] The borate glass-ceramics obtained in this embodiment can be excited by violet light in the wavelength range of 320-380 nm. Under the excitation of 366nm purple light, the luminescent color is blue and the brightness is high. like figure 1 As shown, the excitation wavelength range is 320-380nm,...

Embodiment 2

[0036] Weigh 5.17g of sodium carbonate, 9.81g of yttrium oxalate, 13.72g of boric acid, 12.7g of aluminum oxalate and 0.15g of cerium oxide, and obtain a uniform powder by ball milling or mortar grinding. Put the ground raw material into an alumina crucible, put it into a high-temperature furnace, and keep it at a high temperature of 1580°C for 30 minutes to melt it. After melting, the material is poured into a stainless steel plate, quenched and formed into glass. Place the formed glass in H 2 In a reducing atmosphere, heat treatment at 650°C for 6 hours to obtain 22Na 2 O-10Y 2 o 3 -18Al2 o 3 -50B 2 o 3 -0.4CeO 2 Luminous glass-ceramic.

Embodiment 3

[0038] Weigh 2.87g of sodium carbonate, 2.76g of yttrium oxide, 6.04g of boric acid, 2.07g of aluminum oxide and 0.07g of cerium oxide, and obtain a uniform powder by ball milling or mortar grinding. Put the ground raw material into an alumina crucible, put it into a high-temperature furnace, and keep it at a high temperature of 1650°C for 30 minutes to melt it. After melting, the material is poured into a stainless steel plate, quenched and formed into glass. Place the shaped glass in N 2 with H 2 25Na 2 O-11.25Y 2 o 3 -18.75Al 2 o 3 -45B 2 o 3 -0.5CeO 2 Luminous glass-ceramic.

[0039] The glass-ceramics obtained in this embodiment can be excited by violet light in the wavelength range of 320-380 nm. Under the excitation of 366nm purple light, the luminescent color is blue and the brightness is high. like figure 2 As shown, the excitation wavelength range is 320-380nm, the emission wavelength range is 400-460nm, the main emission peak is located at 420nm, and ha...

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Abstract

The invention discloses borate microcrystalline glass and a method for preparing the same. The borate microcrystalline glass mainly comprises the following components: Na2O, Al2O3, Y2O3, B2O3 and CeO2. The preparation method comprises the following steps of: grinding and mixing aluminum compounds, yttrium compounds, Na2CO3, H3BO3 and CeO2, which serve as raw materials; melting the mixture at the temperature of between 1,580 and 1,700 DEG C; performing casting moulding of the melted mixture; and under a reducing atmosphere, heating the moulded glass to the temperature of between 650 and 900 DEG C to perform heat treatment for 4 to 10 hours to obtain the borate microcrystalline glass. The invention provides the borate microcrystalline glass which can replace epoxy resin and has high luminous intensity, stable lighting, and low cost; and the invention also provides a method for preparing the blue light emitting borate microcrystalline glass, which has the advantages of simple process steps, easy control of process conditions, easy operation and low cost.

Description

technical field [0001] The invention belongs to the technical field of optoelectronics and lighting engineering, and relates to a luminescent glass and a preparation method thereof, in particular to a borate glass-ceramic and a preparation method thereof. The glass-ceramic is suitable for excitation of ultraviolet LED chips. Background technique [0002] LED is widely used in the field of optoelectronics and lighting engineering technology because of its advantages of small solidification, shock resistance, non-damage, high luminous efficiency, and no pollution. At present, LED light-emitting devices mainly use blue light chips or purple light chips to excite three-primary-color phosphors to emit light, and the light emitted by the three-primary-color phosphors is combined to produce white light. This light-emitting device has high luminous efficiency, but there are the following defects: (1) the epoxy resin used to package the LED is easily aged at high temperature, and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/02
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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