Izvorni znanstveni članak
Direct Synthesis of α-Silicon Nitride Nanowires from Silicon Monoxide on Alumina
Jiang Cui
; Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan Province, China
Bin Li
; Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan Province, China
Changrui Zhang
; Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan Province, China
Siqing Wang
; Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan Province, China
Sažetak
Silicon nitride nanowires were synthesized using silicon monoxide as raw materials and an alumina plate as substrate at 1500°C. The obtained nanowires were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, high-resolution transmission electron microscopy and thermogravimetric-differential scanning calorimetry. The results revealed that silicon nitride nanowires possess a diameter of about 200 nm and a length of several hundred micrometres. The preferred growth direction of the nanowires was [100]. The chemical and structural composition of the silicon nitride nanowires were also studied and were shown to have a composition of primarily α-Si3N4. The temperature for fierce oxidation in air was above 1135°C. The formation mechanism of silicon nitride nanowires was assumed to be a vapour-solid (VS) process.
Ključne riječi
Silicon Nitride Nanowires; Nitridation; Silicon Monoxide; Alumina
Hrčak ID:
157556
URI
Datum izdavanja:
1.1.2015.
Posjeta: 820 *