以天然鳞片石墨粉为骨料炭、中间相沥青作粘结剂、以及Si,Ti为添加剂,利用热压工艺制备了系列炭/陶复合材料.考察了热压温度对材料物理性能和微观结构的影响.研究表明:随着热压温度的升高,最终材料的导热率和热扩散系数都单调增大;而抗弯和抗压强度则有所下降.当热压温度为2700℃时,在平行于石墨层方向材料的温热导热率、热扩散系数、抗弯和抗压强度分别为654W/m·K,413mm2/s,34.5,31.5MPa.当热压温度为2300℃时,材料微晶的定向排列程度就较高,晶格排列也较为规则.利用XRD,SEM,TEM等考察了材料的微观结构,探讨了材料导热性能与微观结构之间的相互关系.
参考文献
| [1] | Shim H B et al.The European Carbon Conference[J].Carbon,96:551. |
| [2] | Ohki Y et al.The European Carbon Conference[J].Carbon,98:679. |
| [3] | Kuga Y;Endoh S;Chiyoda H et al.Grinding characteristics of bromine-exfoliated graphite and natural graphite[J].Powder Technology,1990,60:191-196. |
| [4] | Y.Kuga;M.Shirahige;T.Fujimoto;Y.Ohira;A.Ueda .Production of natural graphite particles with high electrical conductivity by grinding in alcoholic vapors[J].Carbon: An International Journal Sponsored by the American Carbon Society,2004(2):293-300. |
| [5] | Hong-Li Zhang;Shu-He Liu;Feng Li .Electrochemical performance of pyrolytic carbon-coated natural graphite spheres[J].Carbon: An International Journal Sponsored by the American Carbon Society,2006(11):2212-2218. |
| [6] | Takahashi H;Kuroda H;Akamatu H .Correlation between stacking order and crystallite dimensions in carbons[J].Carbon,1964,2:423-433. |
| [7] | Kelly BT.Physics of graphite[M].London:Butterworths,1981:20-22. |
| [8] | 钱湛芬.炭素工艺学[M].北京:冶金工业出版社,1996:165-166. |
| [9] | 蔡作乾;王琏;杨根.陶瓷材料辞典[M].北京:化学工业出版社,2001:262. |
| [10] | Zhang GJ.;Guo QG.;Liu ZJ.;Yao LH.;Liu L.;Li JG.;Chen JL. .Effects of dopants on properties and microstructure of doped graphite[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2002(2/3):187-192. |
| [11] | 李圣华.炭石墨材料制品[M].北京:冶金工业出版社,1983:40-50. |
| [12] | 范壮军 .细粒炭/陶复合材料的制备与性能研究[D].中国科学院山西煤炭化学研究所,2003. |
| [13] | Haipeng Qiu;Yongzhong Song;Lang Liu;Gengtai Zhai;Jingli Shi .Thermal conductivity and microstructure of Ti-doped graphite[J].Carbon: An International Journal Sponsored by the American Carbon Society,2003(5):973-978. |
| [14] | 张光晋 .掺杂石墨导热、导电性能及其微观结构的研究[D].中国科学院山西煤炭化学研究所,2001. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%