据《科技日报》2007年5月1日报道,一块月饼大小,硬度仅次于金刚石的灰色的晶体块。这是晶体材料国家重点实验室刚刚出炉的3英寸碳化硅单晶。该实验室宣布,这是我国在研制2英寸碳化硅单晶获得成功以来,在大直径碳化硅单晶研究方面取得的又一突破性进展。我国在“十五”期间获得2 According to “Science and Technology Daily” reported on May 1, 2007, a piece of moon cake size, hardness second only to diamond gray crystal block. This is the 3-inch silicon carbide single crystal just released by National Key Laboratory of Crystal Materials. The lab announced that this is another breakthrough that has been made in the research of large diameter silicon carbide single crystal since it succeeded in developing 2-inch silicon carbide single crystal in our country. China won 2 during the Tenth Five-Year Plan