Xingyuan LUO
,
Jialin SUN
,
Chengji DENG
,
Yanruo HONG
材料科学技术（英）
It is worth to study the synthesis of β-Sialon from coal gangue, because coal gangue is a waste of coal production and is a high quality kaolin contained carbon which is a perfect raw material of contained reducer itself for synthesis of β-Sialon. The study showed that a high conversion rate of 95% from coal gangue to β-Sialon could be obtained by using process of carbothermal reduction nitridation when strictly controlled the thermodynamic conditions of synthesis. For controlling the synthesis conditions easy, the details of the effects of pco, po2 and T on the conversion rate of β-Sialon were discussed detailedly and the phase diagrams of oxygen pressure vs composition for Si3N4-AlN-Al2O3-SiO2 system at 1350, 1500, and 1600oC were constructed in the paper.
关键词:
β-Sialon
,
null
,
null
,
null
Haifei YAO
,
Jialin SUN
,
Wei LIU
,
Hongsan SUN
材料科学技术（英）
The effect of an external magnetic field on the preparation of silver nanowires was studied. The silver nanowires were synthesized using solid electrolyte RbAg4I5 thin films by applying both a direct current (DC) electric field and a magnetic field. The RbAg4I5 thin films, which were prepared by deposition at room temperature and atmospheric pressure on a NaCl substrate, were used for the transfer of Ag+ ions between two Ag electrodes during the preparation process. When only the DC electric field is applied, the silver ions migrate toward the cathode. On the edge of the silver film at the cathode the Ag+ ions congregate to form aligned nanowires. If the magnetic field is also applied perpendicular to the DC electric field, the morphology of the nanowires can be controlled by rotating the sample in the magnetic field. Experimental results show that the growth of the silver nanowires is determined by the Ag+ ionic flux.
关键词:
Silver nanowires
,
固体电解质
,
磁场
