葡萄糖为碳源的SiC-TiC复合粉末合成工艺研究
发布时间：2019-06-08 16:28
【摘要】：以硅溶胶、葡萄糖和TiO_2为初始原料,采用碳热还原法在氩气气氛下合成SiC-TiC复合粉末。探讨了不同反应温度对SiC-TiC复合粉末的物相组成、粒径分布、显微形貌等方面的影响。采用X-射线衍射仪(XRD)、激光粒度分析仪、扫描电镜(SEM)等手段对所合成的SiC-TiC复合粉末进行表征。研究结果表明:SiC-TiC复合粉末适宜的合成条件为在1550℃保温2 h。在1550℃下合成的SiC-TiC复合粉末主要由少量的片状颗粒、一定量的晶须以及大量的近似球状颗粒构成。粉末样品中SiC晶须的生长机理遵循气-固(VS)机理。
[Abstract]:Using silica sol, glucose and TiO_2 as initial raw materials, SiC-TiC composite powder was synthesized by carbothermal reduction in argon atmosphere. The effects of different reaction temperatures on the phase composition, particle size distribution and microstructure of SiC-TiC composite powder were discussed. The synthesized SiC-TiC composite powder was characterized by X-ray diffractometer (XRD), laser particle size analyzer and scanning electron microscope (SEM). The results show that the optimum synthesis conditions of SiC-TiC composite powder are as follows: holding at 1550 鈩，
本文编号：2495421
[Abstract]:Using silica sol, glucose and TiO_2 as initial raw materials, SiC-TiC composite powder was synthesized by carbothermal reduction in argon atmosphere. The effects of different reaction temperatures on the phase composition, particle size distribution and microstructure of SiC-TiC composite powder were discussed. The synthesized SiC-TiC composite powder was characterized by X-ray diffractometer (XRD), laser particle size analyzer and scanning electron microscope (SEM). The results show that the optimum synthesis conditions of SiC-TiC composite powder are as follows: holding at 1550 鈩，
本文编号：2495421
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