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(一)硅粉的性质硅粉是制造硅钢和铁硅合金的副产品。硅粉的化学成分随生产的金属或合金的种类而异,硅粉含有大量的无定形二氧化硅,一般SiO_2含量高达90%以上,由极细的圆形玻璃体组成,具有数量级为20000米~2/公斤的细度,呈浅灰色至深灰色,比重约2.2,松散容重240~288公斤/米~3。硅粉细度与几种材料的细度比较如下:硅粉20000米~2/公斤,烟雾10000米~2,公斤,粉煤灰400~700米~2/公斤,普通水泥300~400米~2/公斤。
(a) the nature of silicon powder silicon powder is a by-product of the manufacture of silicon steel and iron silicon alloy. The chemical composition of silicon powder differs depending on the type of metal or alloy produced. Silica powder contains a large amount of amorphous silica. Generally, the content of SiO2 is as high as 90% or more. It is composed of a very fine round glass body with an order of magnitude of 20,000 meters. 2/kg fineness, light gray to dark gray, specific gravity about 2.2, loose bulk density 240 to 288 kg/m~3. The fineness of silicon powder is compared with the fineness of several materials as follows: silicon powder 20000m~2/kg, smoke 10000~2kg, fly ash 400~700m~2/kg, ordinary cement 300~400m~ 2KG.