以中间相炭微球为碳源,丙烯酰胺为凝胶体系,采用凝胶注模成型工艺制备炭坯体材料;设计了分批添加炭微球结合球磨处理以提高浆料中国相含量的方法;研究了凝胶注模成型工艺对炭微球浆料分散性、黏度、固相含量、凝胶反应及固化和干燥过程的影响.结果表明:在水基浆料中添加相对中间相炭微球质量分数为1％的分散剂,调节pH值到13时,浆料中的颗粒均匀分散、稳定存在;采用分批添加和球磨处理可以增大浆料中的固相含量,最高达到75％,此时浆料的黏度最大,为1.822Pa·s;随着引发剂用量的增大,诱导时间和凝胶反应时间急剧缩短,而催化剂用量对其影响不大,最终选择每30 mL浆料添加0.4 mL引发剂,0.6mL催化剂为宜;浇注前浆料充分真空除气以及干燥起始阶段用酒精置换温坯中的水分是保证炭坯体表面光洁、不开裂的关键因素.
参考文献
| [1] | 夏立博,陈建,李春林,张伟,余霞,冯勇祥,李培德.超细粉制备高密高强炭素材料[J].炭素,2008(04):23-29,17. |
| [2] | Mochida I.;Ku CH.;Watanabe F.;Sakai Y.;Korai Y. .Chemistry of synthesis, structure, preparation and application of aromatic-derived mesophase pitch[J].Carbon: An International Journal Sponsored by the American Carbon Society,2000(2):305-328. |
| [3] | Fujiura R.;Komatsu M.;Mochida I.;Kojima T. .MECHANICAL PROPERTIES OF BINDERLESS CARBON MOULD PREPARED FROM HEAT-TREATED MESOPHASE PITCH OF CONTROLLED GRAIN SIZE[J].Carbon: An International Journal Sponsored by the American Carbon Society,1995(8):1061-1068. |
| [4] | 廖宝莲,黄丽,夏鸿雁,王继平.炭纤维增强中间相炭微球制备炭/炭复合材料[J].硅酸盐学报,2012(05):723-728. |
| [5] | Wang Yong-Gang;Chang Young-Chul;Ishida Sumihito;Kirai Yozo;Mochida Isao .Stabilization and carbonization properties of mesocarbon microbeads (MCMB) prepared from a synthetic naphthalene isotropic pitch[J].Carbon: An International Journal Sponsored by the American Carbon Society,1999(6):969-976. |
| [6] | 宋永忠,翟更太,李贵生,宋进仁,史景利,郭全贵,刘朗.中间相炭微球模压高密高强炭/石墨材料的XRD研究[J].炭素技术,2008(01):1-3. |
| [7] | BHATIA G;AGGARWAL R K;PUNJABI N et al.Effect of sintering temperature on the characteristics of carbons based on mesocarbon microbeads[J].Journal of Materials Science,1997,32:135-139. |
| [8] | Changjun Zhou;Paul J. McGinn .The effect of oxygen on the processing of mesocarbon microbeads to high-density carbon[J].Carbon: An International Journal Sponsored by the American Carbon Society,2006(9):1673-1681. |
| [9] | HU X B;CHENG G;ZHAO B Y et al.Catalytic effect of dopants on microstructure and performance of MCMP-derived carbon laminations[J].CARBON,2004,42:381-386. |
| [10] | Zhan Jun Liu;Quan Gui Guo;Jin Ren Song .Effect of Ti dopant on shrinkage and performance of MCMB-derived carbon laminations[J].Carbon: An International Journal Sponsored by the American Carbon Society,2007(1):146-151. |
| [11] | 曾凡毅,李树军.不同尺寸MCMB石墨化性能的比较[J].炭素技术,2001(03):21-22. |
| [12] | Xia, H.;Wang, J.;Liu, G.;Shi, Z.;Qiao, G. .Effect of nano-SiC on the sintering behavior and properties of calcined carbon derived from mesocarbon microbeads[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2010(1/3):42-47. |
| [13] | XIA Hong-yan;WANG Ji-ping;JIN Hai-yun et al.Fabrication of SiC ceramic by infiltrating molten Si into mesocarbon microbeads-based carbon perform[J].MATERIALS SCIENCE & ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2010,528:283-287. |
| [14] | Christopher Norfolk;Alexander Mukasyan;Daniel Hayes .Processing of mesocarbon microbeads to high-performance materials: Part I. Studies towards the sintering mechanism[J].Carbon: An International Journal Sponsored by the American Carbon Society,2004(1):11-19. |
| [15] | JANNEY M A;OMATETE O O .Method for molding ceramic powders using a water-based gel casting[P].US,434624,1989. |
| [16] | 晏伯武.凝胶注模成型工艺的研究[J].中国陶瓷,2008(03):24-29. |
| [17] | 黄勇,张立明,杨金龙,谢志鹏,汪长安,陈瑞峰.先进陶瓷胶态成型新工艺的研究进展[J].硅酸盐学报,2007(02):129-136. |
| [18] | 张景贤,江东亮,林庆玲,陈忠明,黄政仁.通过凝胶注模成型和无压烧结制备碳化硅陶瓷[J].硅酸盐学报,2012(08):1154-1157. |
| [19] | 赵席鹏,江开勇,王霏.明胶凝胶注模成型不锈钢浆料的制备与生坯的性能[J].机械工程材料,2012(12):58-61. |
| [20] | 张建伟,江开勇,王霏.凝胶注模成型用316L不锈钢浆料的制备[J].机械工程材料,2009(10):86-89. |
| [21] | HOVIS D B;FABER K T .Extured microstructure in barium-hexaferrite by magnetic field assisted gelcasting and templated grain growth[J].Scripta Materialia,2001,44(11):2525-2529. |
| [22] | 邓斌,黄海英,余瑞金,徐安武.氮化硅粉体水基悬浮液电动特性的研究[J].机械工程材料,2006(01):50-52. |
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%