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Red fluorescent glass ceramic and preparation method thereof

A technology of glass ceramics and red fluorescence, applied in chemical instruments and methods, electric light sources, luminescent materials, etc., can solve problems such as poor thermal conductivity and uneven phosphor coating, achieve good thermal conductivity, avoid aging problems, and avoid The effect of direct contact

Inactive Publication Date: 2018-07-06
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This packaging form currently has bottleneck problems such as uneven phosphor coating and poor thermal conductivity.

Method used

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  • Red fluorescent glass ceramic and preparation method thereof
  • Red fluorescent glass ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0027] 1) According to CaO:La 2 O 3 :Nb 2 O 5 : MnO=27.50:39.95:32.50:0.05 (based on oxide content) component ratio, accurately weigh each raw material: CaCO 3 The mass is 4.0363g, La 2 O 3 The mass is 3.2848g, Nb 2 O 5 The mass is 2.6718g, MnCO 3 The mass is 0.0069g, and it is fully ground in an agate mortar, and then placed in a muffle furnace at 1400°C for 24 hours, cooled to room temperature, and finally red phosphor is obtained.

[0028] 2) According to SiO 2 :B 2 O 3 :ZnO:Na 2 O=15:40:18.2:16 (based on the mass percentage of oxide) component ratio, accurately weigh each raw material: SiO 2 The mass is 3.000g, B 2 O 3 The mass is 8.000g, the mass of ZnO is 3.64g, NaCO 3 The mass is 3.2g, it is ground in an agate mortar, and then it is placed in a muffle furnace to heat at 1200°C for 50 minutes, and the glass is cast and cooled to room temperature. Finally, the glass is ground into glass powder for later use.

[0029] 3) Accurately weigh 0.1500g of red phosphor powder and 3.0000g...

Embodiment example 2

[0035] 1) According to BaO:La 2 O 3 :Nb 2 O 5 : MnO=50.91:27.05:22.01:0.03 (in terms of oxide content) component ratio, accurately weigh the drug with a total mass of 10g, of which BaCO 3 The mass is 5.7164g, La 2 O 3 The mass is 2.3594g, Nb 2 O 5 The mass is 1.9192g, MnCO 3 The mass is 0.005g, and it is fully ground in an agate mortar, and then placed in a muffle furnace at 1250°C for 22 hours and cooled to room temperature to finally obtain a red phosphor.

[0036] 2) According to SiO 2 :B 2 O 3 :ZnO:Na 2 O=15:40:18.2:16 (based on the mass percentage of oxide) component ratio, accurately weigh each raw material: SiO 2 The mass is 3.000g, B 2 O 3 The mass is 8.000g, the mass of ZnO is 3.64g, NaCO 3 The mass is 3.2g, it is ground in an agate mortar, and then it is placed in a muffle furnace to heat at 1200°C for 50 minutes, and the glass is cast and cooled to room temperature. Finally, the glass is ground into glass powder for later use.

[0037] 3) Accurately weigh 0.3g of red phosp...

Embodiment example 3

[0043] 1) According to BaO:La 2 O 3 :Sb 2 O 5 : MnO=48.59:25.82:25.56:0.03 (in terms of oxide content) component ratio, accurately weigh the drug with a total mass of 10g, of which BaCO 3 The mass is 5.4877g, La 2 O 3 The mass is 2.2650g, Sb 2 O 5 The mass is 2.2425g, MnCO 3 The mass is 0.0048g, it is fully ground in an agate mortar, and then placed in a muffle furnace at 1250°C for 24 hours and cooled to room temperature to finally obtain a red phosphor.

[0044] 2) According to SiO 2 :B 2 O 3 :ZnO:Na 2 O=15:40:18.2:16 (based on the mass percentage of oxide) component ratio, accurately weigh each raw material: SiO 2 The mass is 3.000g, B 2 O 3 The mass is 8.000g, the mass of ZnO is 3.64g, NaCO 3 The mass is 3.2g, it is ground in an agate mortar, and then it is placed in a muffle furnace to heat at 1200°C for 50 minutes, and the glass is cast and cooled to room temperature. Finally, the glass is ground into glass powder for later use.

[0045] 3) According to the ratio of powder to g...

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Abstract

The invention discloses a red fluorescent glass ceramic and a preparation method thereof, and belongs to the field of fluorescent glass ceramics. The red fluorescent glass ceramic is prepared by mixing red fluorescence powder and glass powder based on the mass ratio of (0.01-0.2): 1, wherein the red fluorescence powder comprises the following four components in percentage by mass: AO ranging from22.64 to 50.91%, La2O3 ranging from 25.82 to 39.95%, R2O5 ranging from 22.00 to 44.45%, and MnO ranging from 0.03 to 0.05%; AO is CaO, SrO or BaO; R2O5 is Nb2O5, Ta2O5 or Sb2O5; the glass powder comprises SiO2, B2O3, ZnO and Na2O based on the mass ratio of 15: 40: 18.2: 16. The method comprises the following steps: adding a mixture of the red fluorescence powder and the glass powder to a mortar; milling to uniformly mix the raw materials; transferring the uniformly-milled sample into a crucible; and roasting for 10-20min under the temperature of 600-700 DEG to obtain the red fluorescent glasspowder. The red fluorescent glass powder is high in performance of the fluorescence powder; the problem of ageing caused by epoxy resin is avoided; in addition, the encapsulating mode of a white-lightLED is changed; and meanwhile, the process is simple; the repeatability is high; and large-scale and massive industrial production can be conveniently carried out.

Description

Technical field [0001] The invention relates to the field of fluorescent glass ceramics, in particular to a red fluorescent glass ceramic and a preparation method thereof. Background technique [0002] As white light LED devices have the advantages of high luminous efficiency, low power consumption and environmental friendliness, white light emitting diodes (LEDs) have attracted much attention in recent years. Currently using InGaN chips to excite YAG:Ce 3+ Yttrium aluminum garnet phosphor is the main form of white light, and the packaging materials are mainly organic materials such as epoxy resin and silica gel. This packaging form currently has bottlenecks such as uneven phosphor coating and poor thermal conductivity. Therefore, an effective way to solve the current bottleneck of organic packaging is urgently needed. Summary of the invention [0003] The purpose of the present invention is to provide a red fluorescent glass ceramic, which can not only stabilize the performance...

Claims

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Application Information

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IPC IPC(8): C03C10/00C03C4/12F21S8/00C09K11/02C09K11/78
CPCC03C4/12C03C10/0009C09K11/025C09K11/7703F21S8/035Y02B20/00
Inventor 房永征田小平侯京山刘玉峰赵国营潘彩霞刘静慧蒋广翔
Owner SHANGHAI INST OF TECH