模具钢微细蚀刻的侧蚀研究及其工艺优化

目的 研究 HNO₃ 浓度、喷淋压力、掩膜间隙、加工时间对侧蚀量的影响规律。 方法 设计正交实验,测定蚀刻后的侧蚀量,采用极差分析、方差分析法对侧蚀量进行分析,通过验证性实验进行验证。结果 侧蚀量随加工时间的延长以及喷淋压力、加工时间的增大而增大, 随 HNO₃ 浓度的增大而减小。侧蚀量最小的工艺是:HNO₃ 浓度为 1 . 8 mol / L,喷淋压力为 0 . 2 MPa,掩膜间隙为 50 μm,蚀刻时间为 2min。 结论 加工时间对侧蚀量有显著性影响,喷淋压力对侧蚀量影响较大,其次是掩膜间隙和 HNO₃ 浓度。 验证性试验证明最优工艺方案可行。     

Selective micro-etching of duplex stainless steel for preparing manganese oxide supercapacitor electrode

In this investigation, manganese oxide electrodes that incorporate selectively micro-etched duplex stainless steel (DSS) for supercapacitor applications were fabricated. The experimental results demonstrate that selective dissolution of the γ phase could result in the formation of α phase network, and vice versa. Controlling the extent of selective dissolution produces a surface with a concave–convex morphology, increasing the surface area. Manganese oxide could then be anodically deposited onto the etched dual phase steel current collector. The experimental results of cyclic voltammetry (CV) show that the specific capacitance increased with the etching depth of either the γ or the α phase. Additionally, selective dissolution occurred in α phase had a better effect on increasing the specific capacitance. The successful application of selective dissolution in fabricating a current collector was thus demonstrated.     

DK2540型工业纳滤膜处理微蚀废液的研究

为了循环利用深圳某电路板厂的微蚀刻废液,首先研究了利用铜粉还原去除废液中的氧化性物质,然后通过用DK2540型工业高脱盐纳滤膜处理,浓缩废液中的铜,回收其中的酸.实验结果为在室温下,桨搅拌速率为300 r/min,投料比n（Cu）∶n（Na2S2O8）=1.2,反应时间70 min时,对过硫酸钠有最高去除率89.37％.在压力4 MPa,进料流量770 L/h时,Cu2＋有最高截留率90.22％,H＋有最高透过率75.68％.对于ρ（铜）=1.55 g/L的废液,可以浓缩ρ（铜）=20 g/L,原液体积减少95％以上.实验表明利用膜法可以实现微蚀废液的循环利用.