| 1. | Recently , as an advanced and eco - friendly method of powder preparation , freeze - drying has been developing quickly . the ultrafine ni powder with the average size of 50nm was prepared by freeze - drying form the niso4 and naoh and was studied by means of xrd , ir , fesem , tem , and dsc . the catalysis of nickel powders to nh4clo4 and how the precursor forms and the processes of the amorphous precursor to the final nickel powders are discussed
本论文以分析纯niso4 、 naoh为原料,采用冷冻干燥技术成功的制备了50nm左右的球状超细镍粉,通过xrd 、 ir 、 fesem 、 tem 、 dsc等材料现代分析手段对产物进行了分析和表征,研究了超细镍粉对高氯酸铵热分解的催化活性、前驱体的形成以及非晶态金属盐到晶态超细镍粉的转变过程。 |
