学术论文

      Nickel-catalyzed Construction of Heat Conductive Network in Electrically Calcined Anthracite (ECA)Based Carbon Blocks

      Abstract:
      Nickel nitrate was introduced into carbon blocks by using ECA aggregates as catalyst-carrier.The Ni-containing anthracite aggregates were firstly prepared by mixing anthracite aggregates in nickel nitrate ethanol solution and then incorporated into carbon blocks after pre-treating.The phase composition,microstructure and properties of all carbon blocks fired at 1 000 ℃ or 1 400 ℃ in a coke bed were studied with the aid of an X-ray diffractomer,a field emission scanning electron microscope,a mercury porosimetry and a laser thermal conductivity meter.The results showed that the addition of Ni-containing anthracite aggregates promoted the formation of one-dimensional nanocarbon and β-SiC whiskers at 1 000 ℃ and the growth of β-Sialon at 1 400 ℃,respectively.Moreover,the cold compressive strength and microporosity characteristics of the carbon blocks with the addition of Ni-containing anthracite aggregates were enhanced and the thermal conductivity was remarkably improved attributing to the high heat conductive network formed by the ceramic phases.
      Author: WANG Tongsheng LI Yawei SANG Shaobai
      作者单位: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
      年,卷(期): 2017, 26(1)
      在线出版日期: 2017年4月18日
      基金项目: The authors would like to thank the financial support from the National Natural Science Foundation of China