用金相显微镜研究了单根膨胀石墨蠕虫压片的表面,发现其具有类似于金属的金相结构.用金属粒度评级软件对所得图像的晶间界进行重构,并分析了其平均粒径.结果表明:蠕虫压片晶粒平均粒径为30 μm～45μm,与原始天然鳞片石墨的粒度及膨胀工艺无关.X射线衍射(XRD)、扫描电镜(SEM)与原子力显微镜(AFM)观察表明:蠕虫压片晶粒存在亚结构,亚结构晶粒内部石墨的结晶完善,单个亚晶粒与原始鳞片石墨外观相同,呈片状,La为3μm ～8μm,Lc为30nm ～80nm.此外,根据XRD数据计算了压片后的膨胀石墨晶粒的取向度和峰背比值,发现晶粒沿垂直于压力的平面取向排列,并且压力越大,晶体的取向越明显.
参考文献
| [1] | Shen Wanci;Wen Shizhu;Cao Naizhen .Expanded Graphtie-A New Kind of Bionedical Material[J].Carbon: An International Journal Sponsored by the American Carbon Society,1999(2):356-358. |
| [2] | Michio INAGAKI,Tomoya NAGATA,Taisuke SUWA,Masahiro TOYODA.膨胀石墨对各种油类的吸附动力学[J].新型炭材料,2006(02):97-102. |
| [3] | Krzesinska M .Influence of the raw material on the pore structure and elastic properties of compressed expanded graphite blocks[J].Materials Chemistry and Physics,2004(2/3):336-344. |
| [4] | Celzard A.;Mareche JF.;Furdin G. .Surface area of compressed expanded graphite[J].Carbon: An International Journal Sponsored by the American Carbon Society,2002(14):2713-2718. |
| [5] | Celzard A.;Mareche JF. .Permeability and formation factor in compressed expanded graphite[J].Journal of Physics. Condensed Matter,2001(20):4387-4403. |
| [6] | Celzard A.;Mareche JF.;Puricelli S.;Krzesinska M. .Scalar and vectorial percolation in compressed expanded graphite[J].Physica, A. Statistical mechanics and its applications,2001(3/4):283-294. |
| [7] | 李冀辉,刘淑芬.膨胀石墨孔结构及其吸附性能研究[J].非金属矿,2004(04):44-45. |
| [8] | Inagaki M;Kang Fei-yu.Carbon Meterials Science and Engineering[M].北京:清华大学出版社,2006:113-117. |
| [9] | Lopez-Macipe A.;Rodriguez-Clemente R.;Gomez-Morales J. .Nanosized hydroxyapatite precipitation from homogeneous calcium/citrate/phosphate solutions using microwave and conventional heating[J].Advanced Materials,1998(1):49-53. |
| [10] | 吴刚.材料结构的表征及应用[M].北京:化学工业出版社,2002:271. |
| [11] | 高林,龚银香,马玲.膨胀次数对天然鳞片膨胀石墨微结构的影响[J].新型炭材料,2006(02):139-143. |
| [12] | 邱英华,王同华,宋成文,曲新春.热解氛围对聚丙烯腈分离炭膜微结构的影响[J].新型炭材料,2006(02):161-166. |
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%