Basic development research on seismic electret power generation system with micro combustion engine

微尺度能源在移动电子设备、小型福利设备以及微型飞行器等自主机器人上的应用备受关注。特别是在这些移动设备内部，化学能转化为电能有其优点，因为化学燃料的能量密度比高性能二次电池高两个数量级。在本研究中，我们的目标是利用微型发动机和陶瓷燃烧室开发微型驻极体发电机。到目前为止，我们已经使用高精度陶瓷带铸造技术制造了微催化燃烧器，该技术是为LSI封装技术而开发的。我们成功地将纳米多孔氧化铝层集成在陶瓷微通道中作为催化层。这个燃烧器的燃烧密度可达100 MW/m^ 3。我们还开发了一种微型超音速喷射器，它利用燃料压力将空气引入燃烧室。

Microscale energy sources are attracting much attention targeting at their application to mobile electronic devices, small-scale welfare equipments and autonomous robot such as micro air vehicle. Especially, conversion of chemical energy to electric energy inside those mobile devices has merits, because the energy density of chemical fuels is two orders of magnitude higher that that of high-performance secondary battery. In the present study, we aim at development of micro electret generator using micro engine and ceramic combustor.So far, we have fabricated micro catalytic combustor using high-precision ceramic tape casting technology, which is developed for LSI packaging technology. We successfully integrate nano-porous alumina layer in the ceramic microchannel as the catalytic layer. This combustor yields a combustion density of several 100 MW/m^-3. We have also developed a micro supersonic ejector, which introduces air into the combustor using the fuel pressure.