他们用到了稻壳灰(也就是稻谷脱粒之后焚烧稻壳剩下的灰烬，其中富含二氧化硅和碳)，经过简单处理后开发出一种制造隔热板的新材料。
They took something called rice husk ash: the leftover husks from processing rice is burned for energy, and the ash remains. It's high in silica and carbon.
通常，硅碳化合物通常由加热的沙子(通常由石英构成，或称二氧化硅)和石油或煤炭中提取的碳放在电气炉内反应而得到。
Normally, silicon carbide is produced by heating sand (which is made of quartz, or silicon dioxide) in an electric furnace with carbon made from oil or coal.
碳及二氧化硅层可以分别通过高温煅烧、浓氨水溶解的方法除去。
The carbon and silica could be removed by calcination and etched away by ammonia, respectively.
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