[Source: Gaogong LED's "LED Good Products" November issue (Total 59) Wen|Gan Qin] At present, the substrate occupies a high cost in the filament lamp, and its material is mainly metal, sapphire and glass. However, the glass is very brittle, it is easy to break during processing, the sapphire is very hard, and warping is easy to occur during processing.
Previously, sapphire substrates were mostly used for the production of sapphire substrates, but the sapphire substrate of the filament lamp was much smaller than the sapphire substrate, and the technical difficulty was greater, resulting in too high cost of cutting.
Recently, Ying Luohua Chairman Wang Pingjin introduced at the Gaogong LED Forum. The company has introduced a nano-translucent ceramic filament with superior performance, which can greatly reduce the cost of the filament lamp. It is a cost-effective filament material.
“Because of the high quality of sapphire crystals, the operation is very complicated, resulting in poor consistency. In addition, in terms of performance, sapphire will produce slag and strength reduction through laser, and slag is not easy to handle, thus affecting light efficiency.†Wang Pingjin said, “We The nano-ceramic substrate adopts the first domestic molding mode without laser division, which ensures the performance and greatly reduces the cost.
Wang Pingjin said, "We have obtained through experiments that the thermal conductivity of nano-translucent ceramics can reach 25W/mk, which is very close to the performance of sapphire. In addition, the technology can be formed by one-time engraving, which facilitates subsequent automatic slitting after sintering. Subsequent automated production, after splitting, the material strength is high and the production capacity is higher."
Yan Chongguang, a part-time professor at the Shanghai Institute of Microelectronics, Peking University, pointed out that glass materials are cheap, but the materials are brittle and brittle. The transparent ceramics have good stiffness and a certain thermal conductivity, which can be used to produce better quality filaments.
Lin Feng, director of stellar lighting research and development, said, “From the perspective of price, the cost of sapphire is the most expensive, and its price will only rise in the future. The price of ceramics is close to the price of glass, but in terms of performance and yield. Ceramic materials do have to dominate."
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