非晶态镍-磷-碳-氧合金超细粉体的制备

Preparation of amorphous Ni-P-C-O alloy ultrafine powders

在固定化学镀镍配方及工艺条件下,采用自制的反应装置研究了制备镍-磷-碳-氧非晶态合金微纳米颗粒的工艺,检测了合金颗粒的形貌与粒径分布;通过理论推导与实验验证得到了粉体制备的相关工艺参数及影响因素。结果表明,粒径的增大与其在镀液的停留时间成正相关性(R=0.2287 t+c0);反应液高度H的调控受反应体系多因素的影响,与颗粒半径R存在一定的对应关系:(1)当颗粒沉降为滞流,则H=u2/(16.95−2.12×10−7 u/R2);(2)若颗粒沉降为湍流,则H=u2/(16.95−4.53×10−2 u2/R)。镀液的温度与pH值的增大对Ni-P-C-O颗粒粒径的增长起促进作用。但镀液中加入乙醇、或PEG400均能有效抑制Ni-P-C-O颗粒的生长,提高颗粒的分散稳定性;而加入十六烷基三甲基溴化铵(CTAB),则对纳米粒子的团聚起促进作用。这套简易装置可用作其它微纳米粉体粒径的连续可控制备。

Taking myself reaction device,the process of making Ni-P-C-O amorphous alloy nanoparticles is determined under the steady electroless plating solution and technology conditions,and the microphotograph and size distribution of alloy nanoparticls are characterized,and the process parameters and influencing factors of powder preparation are obtained by theoretical derivation and experimental verification.The results show that the increase of the particle size(R)is positively correlated with the residence time(t)of the plating solution(R=0.2287t+c0),and the control of the plating solution height(H)of the reaction fluid is influenced by many factors of the reaction system,and there is a certain correspondence with the particle radius R:(1)when the sedimentation of the particles in the plating solution is stagnant,it leads to the result as H=u2/(16.95−2.12×10−7u2/R);(2)if it is turbulent,there is a formula as H=u2/(16.95−4.53×10−2u2/R).The increases of temperature and pH value of the plating solution can promote the increase of particle size of Ni-P-C-O particles.However,the addition of ethanol or PEG400 in the plating solution can effectively inhibit the growth of Ni-P-C-O particles and improve the dispersion stability of the particles,while the addition of cetyltrimethylammonium bromide(CTAB)can promote the agglomeration of nanoparticles.This simple device can be used by the continuous and controllable preparation of other nanometer powders.