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Composite ceramic material for LED energy-saving lamp base

A technology of LED energy-saving lamps and composite ceramics, applied in the field of high-temperature structural ceramics, can solve the problems of heat accumulation, reduced luminous efficiency, and shortened working life of LED semiconductor chips, and achieve the goal of improving environmental heat dissipation, improving luminous efficiency, and extending working life Effect

Inactive Publication Date: 2013-12-11
唐山市科硕特种陶瓷制造有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal conductivity of alumina ceramics is small, that is, the heat flow through the alumina ceramic body per unit time is small. When alumina ceramics are used as the base of high-power LED energy-saving lamps, if the heat transfer through the alumina ceramic body is lower than The heat generated by the LED semiconductor chip will lead to heat accumulation, temperature rise, luminous efficiency reduction, and shortened working life of the LED semiconductor chip.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The raw materials used in the composite ceramic material for the base of the LED energy-saving lamp and the weight percentages of the raw materials are: 65.0% of the main component α-alumina powder, and 35.0% of the secondary component of aluminum nitride powder. Dehydrate and dry the slurry after wet fine grinding of α-alumina, disperse the dehydrated and dried α-alumina powder, mix and homogenize the dispersed α-alumina fine powder and aluminum nitride powder , the homogenized α-alumina-aluminum nitride mixed fine powder is heated with paraffin to prepare a wax liquid slurry, the wax liquid slurry is stirred and homogenized, and then hot-pressed to form a ceramic body, and the ceramic body is dewaxed Then carry out high-temperature sintering in a nitrogen atmosphere, the sintering temperature is 1700 ° C for 2 hours, and the sintered ceramic material is subjected to anti-oxidation treatment at 1000 ° C for 30 minutes under air conditions, and then the composite ceramic...

Embodiment 2

[0020] The raw materials used in the composite ceramic material for the base of the LED energy-saving lamp and the weight percentage of the raw materials are: 55.0% of the main component α-alumina powder, and 45.0% of the secondary component of aluminum nitride powder. Dry mix α-alumina powder and aluminum nitride powder first, then add an appropriate amount of absolute ethanol-phenolic resin solution (the mass concentration of phenolic resin is 2%) and continue to stir and mix for 10 minutes. After removing most of the ethanol from the mixture, The ceramic body is molded by a hydraulic press, and the ceramic body is dried and sintered at a high temperature in a nitrogen atmosphere. The sintering temperature is 1700 ° C for 2 hours. A composite ceramic material that can be used as a base of an LED energy-saving lamp is obtained.

[0021] The thermal conductivity of the composite ceramic material is 75.2W / mK, which is greatly improved compared with the thermal conductivity (19....

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Abstract

The invention relates to a composite ceramic material for an LED energy-saving lamp base. The composite ceramic material comprises 55.0-95.0% of alpha-alumina powder and 5.0-45.0% of aluminum nitride powder, wherein the grain size of the alpha-alumina powder is less than 0.010mm, and the grain size of the aluminum nitride powder is less than 0.005mm. The forming method can adopt injection moulding, compression moulding or hot press moulding. A nitriding atmosphere can be used for pressureless sintering or hot pressed sintering in the firing method. The firing temperatures of different firing methods are all not less than 1,500 DEG C. The composite ceramic material for the LED energy-saving lamp base provided by the invention is low in thermal conductivity, the working temperature of an LED energy-saving lamp is reduced, the illuminating efficiency and the service life of the LED energy-saving lamp are improved and prolonged, a novel high-temperature structure material is provided for the domestic field of LED energy-saving lamps, and the composite ceramic material for the LED energy-saving lamp base has wide application prospects.

Description

technical field [0001] The invention belongs to the field of high-temperature structural ceramics, and in particular relates to a composite ceramic material for an LED energy-saving lamp base. Background technique [0002] LED is a semiconductor light-emitting diode (Light-Emitting-Diode), which is a new generation of solid cold light source. LED light source is the second revolution since the development history of incandescent lamp lighting for 120 years. LED energy-saving lamps use high-brightness white light-emitting diodes as light sources, and have the characteristics of high light efficiency, low power consumption, and long life. The lighting brightness of LED energy-saving lamps is 10 times that of incandescent lamps and more than 2.5 times that of ordinary energy-saving lamps. The service life is 50 times that of incandescent lamps and more than 12 times that of ordinary energy-saving lamps. [0003] Although the luminous efficiency of LED energy-saving lamps is mu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622
Inventor 郑林波卜景龙陈越军王江刘建涛王志发
Owner 唐山市科硕特种陶瓷制造有限公司
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