酸性化学镀法制备泡沫铝用Ni/TiH_2包覆粉末发泡剂的工艺及性能研究  

Preparation technology and properties of Ni/TiH_2 foaming agent for aluminum foam by acidic electroless nickel plating process

作　　者：李海普[1] 宋振伟[1] 秦春阳[1] 李星[1] 钟志辉[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《应用化工》2012年第11期1888-1892,共5页Applied Chemical Industry

基　　金：国家自然科学基金项目(50804055);湖南省自然科学基金项目(09JJ3100)

摘　　要：酸性条件下,对常用发泡剂TiH2粉末的表面进行均匀、质量比可控的Ni层包覆,提高其释氢温度并延缓释氢速率。结果表明,以硫酸镍为主盐,NaH2PO2.H2O为还原剂,制备Ni/TiH2复合粉体的最佳工艺条件为:硫酸镍质量浓度30 g/L,NaH2PO2.H2O质量浓度30 g/L,pH值4.5～4.8,缓冲剂浓度为20 g/L,稳定剂浓度为0.8 mg/L,络合剂A浓度为8 mL/L,络合剂B浓度为18 g/L,温度为80℃。Ni含量为30%Ni/TiH2复合粉体镀镍后,开始释氢温度比镀镍前提高300℃,同时释氢速率也得到明显减缓。The Till2 foaming particles would show elevated hydrogen releasing temperature and sluggish gas releasing rate after coated with uniform nickel plating with controllable quality by the electroless nick- el plating process in acidic media. The results showed that NiSO4 is the main salt,NaH2PO2 · H2O is re- ducing agents, Ni/TiH2 composite powder optimal technology conditions are as follows ： NiSO4 30 g/L, NaH2PO2· H2O 30 g/L,pH 4.5 -4.8, buffer 20 g/L,stabilizer 0.8 mg/L,complexing agent A 8 ml/L, complexing agent B 18 g/L, and reaction temperature 80 ℃. Consequently, the obtained Till2 particles coated with 30% nickel showed better performance in increasing hydrogen releasing temperature by 300℃ when compared to the bare precursor. At the same time, the gas releasing rate was also decreased .

关 键 词：Ni TiH2发泡剂 酸性化学镀镍 释氢性能 沉积速率 镀液组成 

分 类 号：TQ153.12[化学工程—电化学工业]