| 二氧化硅微粉对炭素捣打料显微结构及性能的影响 |
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| 引用本文： | 辛占武,顾华志,朱晶晶,杨林,王小军.二氧化硅微粉对炭素捣打料显微结构及性能的影响[J].武汉冶金科技大学学报,2011(4):270-273. |
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| 作者姓名： | 辛占武 顾华志 朱晶晶 杨林 王小军 |
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| 作者单位： | [1]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,湖北武汉430081 [2]太钢不锈钢股份有限公司,山西太原030003 [3]北京瑞普同创科技发展有限公司,北京102400 |
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| 基金项目： | 湖北省自然科学基金重点项目（2009CDA050） |
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| 摘 要： | 以冶金焦粉为主要原料,改性中温沥青粉为结合剂,添加二氧化硅微粉混合成型,于220℃下干燥、1 550℃下埋炭烧成炭素捣打料。测定烧成样的耐压强度、体积密度和导热系数,采用XRD和SEM分析试样物相及显微结构。结果表明,添加了二氧化硅微粉的试样经1 550℃热处理,可原位反应生成碳化硅晶须,二氧化硅微粉初期添加量越大,所生成的碳化硅晶须越多,试样的体积密度、耐压强度和导热系数越高;当二氧化硅微粉添加量为8.5%时,试样的碳化硅晶须生成量减少,导热系数降低。
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| 关 键 词： | 二氧化硅微粉 炭素材料 原位反应 碳化硅晶须 |
Effects of microsilica addition on the microstructure and properties of carbon material |
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| Authors: | Xin Zhanwu Gu Huazhi Zhu Jingjing Yang Lin Wang Xiaojun |
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| Affiliation: | 1.The Cultivation Base for State Key Laboratory of Ceramics and Refractories,Wuhan University of Science and Technology,Wuhan 430081,China;2.Taigang Stainless Steel Co.,Ltd.,Taiyuan 030003,China;3.Ripu Products Technology Development Co.,Ltd.,Beijing 102400,China) |
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| Abstract: | Carbon material was prepared by using waste coke powder as main raw material,modified middle temperature asphalt powder as binder,and microsilica as additive,which were mixed,molded,dried at 220 ℃,embedded in carbon and then fired at 1 550 ℃ for 3 h.The main physical properties of the specimens after firing were investigated,and the phase composition and microstructure of the specimens were characterized by XRD and SEM.The results show that,in-situ synthesized SiC whisker can be generated in the specimens sintered at 1 550 ℃,and with the microsilica addition increasing,the SiC whisker increases.Consequently,the bulk density and compressive strength of the specimensincrease,andthethermalconductivityimproves,butwhentheadditionofmicrosilicais8.5%,the SiC whisker decreases and the thermal conductivity of the specimens decreases. |
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| Keywords: | microsilica carbon material in-situ synthesis SiC whisker |
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