Effect of Multiwalled Carbon Nanotubes on the Thermal Conductivity and Porosity Characteristics of Blast Furnace Carbon Refractories

被引：7

作者：

Li, Yawei ^{[1
]}

Chen, Xilai ^{[1
]}

Li, Yuanbing ^{[1
]}

Sang, Shaobai ^{[1
]}

Zhao, Lei ^{[1
]}

机构：

[1] Wuhan Univ Sci & Technol, Hubei Prov Key Lab Ceram & Refractories, Wuhan 430081, Peoples R China

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2010年 / 41A卷 / 09期

关键词：

COMPOSITES; BEHAVIOR; ROPES;

D O I：

10.1007/s11661-010-0300-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Different amounts of carbon nanotubes (CNTs) (0-5 mass pct) containing carbon refractory specimens for a blast furnace were prepared and coked for 3 hours at 1473 K (1200 degrees C) and 1673 K (1400 degrees C). The thermal conductivity and porosity characteristics of the coked specimens were evaluated using the flash diffusivity technique and mercury porosimetry, respectively. It was found that CNTs acted as carbon source, and most of them were consumed during coking. With the increase of CNT content, the aggregation of CNTs became more severe, the amount of SiC whiskers formed increased and their aspect ratio became larger, and the SiC whiskers tended to be distributed nonhomogeneously. The thermal conductivity of a 4 mass pct CNT containing a carbon specimen was highest because of the contributions of SiC and residual CNTs. The porosity characteristics of a 0.5 mass pct CNT containing a carbon specimen was best because of the uniform filling of SiC whiskers. The excessive addition of CNTs degraded the porosity characteristics because of the severe aggregation of CNTs.

引用

页码：2383 / 2388

页数：6

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