(中南工業(yè)大學(xué)冶金物理化學(xué)及化學(xué)新材料研究所， 長沙 410083)
摘 要: 研究了化學(xué)鍍鎳法對貯氫合金粉末表面鍍鎳的工藝。該法無需經(jīng)過PdCl2活化，在含有0.20 mol/L NiSO4，0.40 mol/L NaH2PO2, 0.06 mol/L Na3C6H5O7, 0.56 mol/LNH4Cl的溶液中， 控制pH9.0～9.5， 溫度50℃， 鍍鎳時間25～30 min，可以得到鍍鎳量為9%～20%(質(zhì)量分數(shù))的鎳鍍層。SEM形貌分析表明，獲得的鍍層厚度和成分均勻，鍍層中含有5%(質(zhì)量分數(shù))的P元素。X射線衍射分析結(jié)果顯示出鍍層為一種非晶態(tài)結(jié)構(gòu)。
關(guān)鍵字: 關(guān)鍵詞: 貯氫合金 化學(xué)鍍鎳 表面修飾
（Institute of Metallurgical Physicochemistry and Materials,Central South University of Technology, Changsha 410083, P. R. China）
Abstract:Particles of hydrogen-storage alloy La(NiSnCo)5.12 have been modified with nickel film by means of a chemical plating process without the activation of PdCl2. The amount of deposited nickel can be controlled within 9%～20%(mass fraction) under conditions of 0.20 mol/L NiSO4，0.40 mol/L NaH2PO2, 0.06 mol/L Na3C6H5O7, 0.56 mol/L NH4Cl, pH 9.0～9.5, temperature 50 ℃ and plating time 25～30 min. The SEM morphology showed that the nickel layer is homogenous. X-ray diffraction analysis showed that the layer is an amorphous structure.
Key words: hydrogen-storage alloy nickel-microencapsulation
surface modification
