In order to improve the purity,compactness and uniformity of magnetron sputtering deposited films at a lower cost,a dual-chamber DC heating filament auxiliary ion source was designed which can activate oxygen.The working parameters of the auxiliary ion source were changed in the experiment to explore their influence on the optical parameters of the films deposited by magnetron sputtering coater.By comparing the transmittance,refractive index and relative thickness of the films which was deposited under different processing conditions,it is finally proved that the auxiliary ion source designed in this work can improve the transmittance,refractive index and uniformity of the single-layer films of Ta2O5 and SiO2 which was coated in this experiment.Thus,the coating quality and effective coating area of the original magnetron sputtering coating machine are improved,and it does have certain practical significance for improving the efficiency of the coating.
By means of UV-Vis（Ultraviolet-visible） spectrophotometry and scanning electron microscopy, the effects of bath immersion, water bath ultrasonic treatment and bath immersion plus water bath ultrasonic treatment on the surface state of ZHL-02 cyanide-free silver plating layer were studied.The results showed that the surface condition of the samples after soaked in plating solution for 15-30 s, or sonicated for 3-5 min in a 40 ℃ water bath, or soaked in plating solution for 20 s first, and then sonicated for 3-5 min in a 40 ℃ water bath were all white and bright, and the particle size of the plating layer was 18-22 nm, and the reflectivity was more than 90% in the range of 460-700 nm.The treatment process of using bath for 20 s and then ultrasonic treatment for 3-5 min at 40 ℃ is better than the previous two methods, which is more suitable for large-scale industrial production.
以表面改性的镀银空心玻璃微珠(HGMs@Ag)和铝粉为低发射率填料,氧化铁黄和氧化铁红为着色颜料,涤纶织物为骨架基材,水性聚氨酯树脂为成膜物,制备了沙土色光学红外隐身涂层.采用红外发射率测试仪、光谱反射率测试仪、光泽度仪、扫描电子显微镜以及电阻测试仪等对样品进行了分析表征,讨论了硅烷偶联剂KH560用量对HGMs@Ag粉体电阻值和发射率值,以及涂料黏度、涂层色差、镜面光泽度、光谱反射率以及红外发射率的影响.研究结果显示,HGMs@Ag经硅烷偶联剂KH560改性处理后,粉体的发射率和电阻值均增大,但同时硅烷偶联剂对改善涂层界面有着重要作用,当KH560质量分数为1.2%时,制备涂层性能最佳,其光学性能满足GJB 1082-1991《伪装网用颜色》中的SE3453沙土色要求,涂层在8～14 μm波段红外发射率为0.527,具有实际应用价值.
以改善30CrMnSi钢中温磷化膜性能为目的,开发了基于氟化镍为促进剂的中温磷化配方.利用开路电位-时间(E-t)曲线研究了氟化镍的促进作用,利用单因素实验考察了柠檬酸和磷化时间对磷化膜性能的影响,通过正交试验优化了磷酸二氢锌、硝酸锌、磷酸、氟化镍的含量.结果表明:当氟化镍含量达到0.8 g/L时,促进了磷化膜的生长过程,磷化反应效果明显;单因素实验和正交试验优化的磷化配方为磷酸二氢锌 30 g/L、硝酸锌 80 g/L、磷酸 8 g/L、氟化镍2 g/L、柠檬酸添加量为1.2 g/L,在60℃下磷化6～10 min.
电解铜箔是电子行业的重要原材料.金属钛因其密度低、耐腐蚀性能好是制备电解铜箔用阳极的理想基材.本文对电解铜箔用钛阳极进行了概述、介绍了钛阳极贵金属涂层制备方法、钛阳极贵金属涂层改性方法及电解铜箔用钛阳极涂层现存问题,并提出了今后的发展方向.
