Advanced manufacturing processes are applied and the content of metal impurity is rigorously controlled. The oxidant is reduced to the minimum extent in each manufacturing process.
采用先进制程并严格控制金属杂质的含量，并在每一制程中将氧化物降至最低程度。
2
This method has been successfully applied to the measurements of impurity compensation and carrier mobility on high resistivity silicon materials.
本方法已成功地用于高阻硅材料杂质补偿度和载流子迁移率的测量。
3
Part of char is used as final product in ferroalloy industries, the rest is treated with impurity removal and brought out the new carbonaceous reductants which applied in copper refining.