Direct thermal-to-electric energy conversion material of environmentally-benign Mg_2Si synthesized using wasted Si sludge

热电发电将废热或太阳能热能直接转化为电能，有望成为减少全球变暖的有效技术之一。硅化镁（Mg_2Si）有潜力成为一种有效的热电材料，工作温度范围从500 K到900 K。在这里，我们试图引入硅污泥工业废料的再利用，作为Mg_2Si的来源材料，因为目前半导体LSI器件的硅产品转化率保持在25 - 30%，而其余大部分作为废物处理；这主要作为研磨和抛光过程中的污泥排出。

Thermoelectric power generation is expected to be one of the effective technologies that will help reduce global warming by directly converting energy from waste heat or solar heat to electricity. Magnesium-Silicide(Mg_2Si) has the potential to be an effective thermoelectric material with operating temperatures ranging from 500 K to 900 K. Here we have tried to introduce reusing of industrial waste of Si sludge as a source material for Mg_2Si, because the current product inversion rate of Si for semiconductor LSI devices remains at 25 to 30%, while most of the remainder is disposed of as a waste ; this is mainly discharged as sludge from grinding and polishing processes.