Nickel silicide,nanocrystal-containing magnetoceramics from the bulk pyrolysis of polysilazane and nickelocene

作者：Zhang, Xiaofei; Chen, Lixin; Meng, Lala; Chen, Fangfang; Kong, Jie^*

来源：Ceramics International, 2014, 40(5): 6937-6947.

DOI：10.1016/j.ceramint.2013.12.017

• Polymer-derived ceramics
• Nickelocene
• Polysilazane
• Magnetoceramics

Nickel silicide nanocrystal containing Si-Ni-C-N multiphase ceramics were synthesized by bulk pyrolysis of the mixture of polysilazane (PSZ) and nickelocene (NiCp2) at high temperature. The pyrolysis behavior of the precursors was investigated by TGA/DSC-Mass Spectrometry. The yield of the ceramic containing NiCp2 precursor was increased by 8-10% compared to pure PSZ. Nickel silicide nanocrystal containing ceramics were characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and Raman spectroscopy. The NiCp2 in polymeric precursors induced the formation of alpha-Si3N4, SiC, graphitic carbon, and Ni2Si at 1100 degrees C. Nickel suicide nanocrystals containing ceramics exhibited soft magnetism with ultralow hysteresis loss offering a convenient cost effective approach for the preparation of tunable transition metal-containing ceramics using a commercial inexpensive polymeric precursor of NiCp2.

• 出版日期2014-6
• 单位西北工业大学