The addition of traces of Al could make the materials containing C ranged from 2.6-3.0% obtain troostite matrix both in sand molds and in metal, sand the materials have good synthetic properties.
The synthetic conditions were optimized. HPLC and IR analysis et al were used to characterize the product.
探讨和优化了合成条件，并采用液相色谱、红外光谱分析等手段确认了产物的结构。
3
In this paper, the pathogenic fungi, the way of infection and spread of black spot ( Alternatia Helianthi) in sunflower, and synthetic control et al were discussed.