叶鑫南
,
赵中玲
,
兰琳
,
黄金秋
,
林昆仑
,
陈立富
无机材料学报
doi:10.3724/SP.J.1077.2008.00243
利用液态硅为原料, 以碳和二氧化硅粉末组成的混合物作为催化剂, 通过液态硅与一氧化碳之间的气-液相碳热反应, 一步合成了高纯度的碳化硅微细粉体, 制得的碳化硅粉体的平均颗粒尺寸为D50=0.41μm. 利用XRD、SEM、激光粒度分析和元素分析对粉体进行了表征, 并讨论了碳化硅粉体的形成机理.
关键词:
碳化硅粉体
,
liquid silicon
,
gas-phase reaction
,
liquid-phase reaction
,
carbothermal reduction
潘顺龙
,
杨岩峰
,
张敬杰
,
宋广智
无机材料学报
doi:10.3724/SP.J.1077.2006.01319
以廉价的水玻璃和炭黑为原料, 采用沉淀-喷雾干燥法制备反应前驱体, 经碳热还原合成碳化硅. 由于原料间混合均匀, 前驱体在1500℃下加热5h后就能实现完全反应. 对产物用XRD、IR、BET及SEM等进行了表征, 并对反应过程中温度、时间的影响进行了研究. 结果表明, 前驱体在1500℃下反应5h制得的产物为平均晶粒尺寸在37nm左右的β-SiC, 比表面积为12.4m2/g. 碳热还原过程中, 适当升高温度、缩短反应时间有利于得到高质量的SiC产物.
关键词:
碳化硅
,
water glass
,
precipitation-spray drying
,
carbothermal reduction
B.H Liu
,
Y Zhang
,
S.X. Ouyang
,
and H.C. Gu (Research Institute of Technical Chemical Physics
,
East China University of Science and Technology
,
Shanghai 200237
,
China)(Department of Materials Physics
,
University of Science and Technology Beijing
,
Beijing 100083
,
China)(State Key Laboratory for Synthesis and Processing of Advanced Materials
,
Wuhan University of Technology
,
Wuhan 430070
,
China)
金属学报(英文版)
Titanium nitride powder was synthesized by microwave carbothermal reduction of titanium oxide. The mechanism and thermal dynamics of the reaction process were studied. The results show that the microwave carbothermal reduction technology has unique advantages over the conventional reduction methods. It can not only lower the reaction temperature, shorten the synthesis cycle, but also refine the product particles,as well as improving the reactivity of the powder.
关键词:
TiN microwave
,
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