Thermally conductive plastics for LED heat sinks reduce lighting costs, increase design freedom
The LED lighting market is continuing to grow with energy-efficient LED technology poised to become a mainstay in residential and commercial lighting. A challenge the industry must overcome is the high price of LED lighting, especially for incandescent replacements, which remains a barrier for mass adoption. Complicated assembly, made more difficult by the conventional materials available, is a significant contributor to this higher cost. To mitigate this problem, LED manufacturers are looking for better material solutions to help streamline the assembly process.
Bayer MaterialScience developed thermally conductive Makrolon® TC8030 polycarbonate to replace aluminum in heat sinks, thereby reducing assembly steps. Thermally conductive polycarbonate can reduce cost per unit in applications, such as multi-faceted reflector (MR) or parabolic aluminized reflector lamp (PAR) configurations.
Nicolas Sunderland, senior scientist; Jim Lorenzo, principal engineer; and Terry G. Davis, principal engineer, all of Bayer MaterialScience, will present “Novel Polycarbonate Heat Sinks for Efficient Thermal Management,” as part of the LED Packaging session (C3) during ITherm 2014 at 11 a.m., Wednesday, May 28.
Dr. Sunderland will discuss simulations and tests conducted to assess the thermal properties of polycarbonate replacement materials when compared to aluminum in LED heat sinks. The findings conclude that the thermally conductive Makrolon® TC8030 polycarbonate can successfully replace aluminum as a heat sink material, and offer a solid value proposition in reducing assembly cost and creating shapes and features that are not possible with aluminum. 作者: sannxi 时间: 2014-6-30 07:27
再转一个和上面相关的：
Cooling LEDs with Air Instead of Heat Sinks
Zeta LED has developed an air-cooled LED light bulb. The Lifebulb consumes 10 watts of power and puts out as much light as a standard 60 watt incandescent, pretty much like existing LED bulbs. The difference comes in the absence of an aluminum heat sink.
Zeta keeps its bulb cool by channeling air through the vents in the structure itself: the vents are the strips and holes separating the yellow LED arrays. The bulb does not come with a covering glass dome as air wouldn’t circulate if the electronics were completely covered. Zeta might cover the LED arrays with a piece of glass, but the vents will remain exposed.
Eliminating the heat sinks and relying on ambient airflow allows Zeta to get the bill of materials for its bulb down to close to $7 dollars, or nearly half the normal bill of materials, McClelland argued. That means Zeta’s bulbs that can retail, in mass production, for $10.
The Lifebulb comes with a new driver from Cypress Semiconductor that you soon might start seeing in other bulbs 作者: forever 时间: 2014-6-30 22:15
搞不清楚是什么材料，塑料吗？ 导热系数不知道有多高。作者: sannxi 时间: 2014-6-30 22:57
是塑料，据说可以用来代替金属，可以再了解一些详细的信息，设置于他的详细热参数！
这个我是在网上转悠看到的这个信息，就贴到这里了，没有专门了解过这种新材料。