Composite ceramic material for LED energy-saving lamp base

Abstract

The invention discloses a composite ceramic material for an LED energy-saving lamp base. The composite ceramic material is calcined from such components as 12-15 parts of nano-zinc oxide, 5-10 parts of silicon dioxide, 6-8 parts of magnesium carbonate, 80-100 parts of active kaolin, 15-18 parts of magnesium oxide, 10-12 parts of titanium dioxide, 100-120 parts of silicon nitride, 50-60 parts of silicon carbide and 3-5 parts of magnesium nitride. The composite ceramic material for the LED energy-saving lamp base has the characteristics of high thermal conductivity and low expansion; the formed composite ceramic material is improved in thermal conductivity, reduced in thermal expansion and enhanced in heat dissipation capability to the environment; as a result, the working temperature of an LED semiconductor chip can be reduced, the luminous efficiency of the same can be improved; the structural stress of the LED semiconductor chip and the base is reduced and the working service life of the LED energy-saving lamp is prolonged.

Description

technical field [0001] The invention relates to a high-temperature structural ceramic material, in particular to a composite ceramic material for an LED energy-saving lamp base. Background technique [0002] Although the luminous efficiency of LED energy-saving lamps is much higher than that of traditional light sources such as incandescent lamps, about 60% of the electric energy forms heat energy during the photoelectric conversion process. If this part of heat energy is not excluded, it will increase the operating temperature of LED semiconductor chips and greatly reduce Luminescence and service life of energy-saving lamps. For example, the working temperature of LED semiconductor chips is 330,000 hours at 45°C, and the working time at 95°C is reduced to 25,000 hours. Therefore, the setting of the heat dissipation mechanism of LED energy-saving lamps has become an important issue restricting the development process of the LED energy-saving lamp industry. [0003] The he...

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.