Molten salt synthesis and characterization of SiC coated carbon black particles for refractory castable applications
Molten salt synthesis and characterization of SiC coated carbon black particles for refractory castable applications
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DOI：
10.1016/j.jeurceramsoc.2013.02.011
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发表时间：
2013-09-01
影响因子：
5.7
通讯作者：
Lee, William E.
中科院分区：
文献类型：
--
作者：
Ye, Jianke;Zhang, Shaowei;Lee, William E.
采用熔融盐合成（MSS）技术在1100 ℃下6 h后在炭黑（CB）颗粒上制备碳化硅（SiC）涂层。通过控制初始批料混合物中的Si与CB的比率（Si/C），可以容易地定制SiC涂层厚度以满足真实的浇注料系统中的实际要求。SiC包覆后CB颗粒的真密度随Si/C的增加而增加。zeta电位值表明，它们的分散性在很宽的pH值范围内明显改善。在给定的剪切速率下，含有SiC涂层的CB的水悬浮液的表观粘度显着低于含有未涂覆的CB的水悬浮液的表观粘度，表明改善的SiC涂层的CB在水中的流动性。SiC包覆炭黑颗粒的水分散性和流动性的改善将使它们成为未来浇注料应用的有希望的候选碳材料。(C)2013爱思唯尔有限公司保留所有权利。
Silicon carbide (SiC) coatings were prepared on carbon black (CB) particles after 6 h at 1100 degrees C by a molten salt synthesis (MSS) technique. By controlling the Si to CB ratio (Si/C) in the initial batch mixture, the SiC coating thickness could be readily tailored to meet practical requirements in real castable systems. True densities of CB particles after SiC coating increased with Si/C. The zeta potential values indicated that their dispersivity was improved evidently over a wide range of pH. At a given shear rate, the apparent viscosity of a water suspension containing SiC-coated CB was significantly lower than that of a water suspension containing as-received uncoated CB, indicating the improved fiowability of SiC-coated CB in water. The improvements in both the water-dispersivity and fiowability of SiC coated CB particles would make them a promising candidate carbon material for future castable applications. (C) 2013 Elsevier Ltd. All rights reserved.