碳化硼/纳米碳化硼120元/kgCas号12069-32-8分子式CB4分子量55.26别名Carbontetraboride外观AppearanceGreytodarkgreypowder纯度Purity≥99.0%晶型Crystalformhexagonal平均粒度Particlesize≤50nm比表面积Specificsurfacearea75㎡/g松装密度Apparentdensity0.10g/cm3)