导电墨水用非晶纳米镍粉的制备与表征

Preparation and characterization of amorphous nickel nanoparticles for ink-jet printing

采用液相还原法,以硼氢化钠为形核促进剂,在低温下制备了非晶纳米镍粉。通过X射线衍射仪(XRD)、扫描电子显微镜/光电子能谱(SEM-EDS)、原子力显微镜(AFM)分别对纳米镍粉的物相、组分、微观形貌及粒径进行了分析,探究了反应物摩尔比、pH调节剂和形核促进剂用量对所制镍粉磷含量的影响。结果表明,硫酸镍与次亚磷酸钠的摩尔比1:3、pH调节剂质量浓度1.92 g/L、形核促进剂质量浓度0.4 g/L为最佳配方,该条件下制得的纳米镍粉的磷含量为质量分数13.16%,且粉体为非晶结构,分散均匀。

Amorphous nano-nickel powders were prepared by liquid phase reduction process with NaBH4 as nucleation promoters at low temperature. The phase structures, components, morphologies and particle sizes of the nano-nickel powders were characterized with X-ray diffraction （XRD）, scanning electron microscope/energy dispersive spectrometry （SEM-EDS） and atomic force microscopy （AFM）. Effects of molar ratio r（NiSO4 · 6H2O：NaH2PO2 · H2O）, dosages of pH regulators and nucleation promoters on the phosphorus content of the prepared nano-nickel powders were studied. The results show that the best preparation parameters of the nano-nickel powders are r（NiSO4 6H20 ： NaH2PO2 H2O） of 1：3, pH regulators mass concentration of 1.92 g/L, nucleation promoters mass concentration of 0.4 g/L. The nanoparticles with phosphorus content of 13.16% （mass fraction） obtained under the optimum reaction conditions are amorphous and well distributed.