| 凝胶注模新工艺制备超轻质氧化铝陶瓷 | |
| 汪长安 ; 陈瑞峰 ; 刘伟渊 ; 周立忠 ; 黄勇 ; Wang Chang-An ; Chen Ruifeng ; Liu Weiyuan ; Zhou Lizhong ; Huang Yong | |
| 2010-07-15 ; 2010-07-15 | |
| 会议名称 | 第十五届全国复合材料学术会议 ; CNKI |
| 关键词 | 氧化铝 超轻质陶瓷材料 胶态成型 多孔陶瓷 Alumina Ultra-low density Gel-casting Porous ceramics TQ174.6 |
| 其他题名 | Alumina Ceramics with Ultra-Low Density Fabricated by a Novel Gel-Casting Technique |
| 中文摘要 | 凝胶注模工艺通常被用来制备高致密度的陶瓷部件,而在本研究中则介绍了利用该工艺制备轻质(相对密度为8%～40%)氧化铝陶瓷材料的方法。在叔丁醇(TBA)中实现了丙烯酰胺单体聚合,以固相体积分数为5%～15%的Al_2O_3/TBA悬浮体为基础,所获得的超轻质坯体干燥收缩率很小,而且具有较高的强度(1MPa～3MPa)。通过调整初始固相体积分数以及烧结温度,氧化铝陶瓷的气孔率可以在60%～92%内变化,气孔率达到92%的氧化铝烧结体比表面积达到14m~2/g,抗压强度超过10MPa。这项工艺方法拓宽了凝胶注模成型工艺的领域,表现出了良好的应用前景。; Gel-casting is a conventional technique used to fabricate high density ceramic parts;however,in this work,alumina ceramics with ultra-low density(8%～40%of theoretical density)were successfully fabricated by this method.In this research,polymerization of acrylamide was realized in alumina/t-butyl alcohol(TBA)slurries with solid loading ranging from 5 to 15 vol%.Green bodies with ultra-low density could be dried with very small shrinkage,and relatively high green strengths(1MPa～3MPa)were achieved.By choosing different initial solid loadings and sintering temperatures,the microstructure of sintered porous ceramics could be effectively controlled,with the porosity ranging from 60%to 92%.Sintered alumina showed high open porosity(90%),high specific area(14m~2/g)and high compressive strength(>10MPa).This technique is considered potentially useful in many applications,and introduces a new application field of gel-casting. |
| 会议录出版者 | 国防工业出版社（National Defense Industry Press） |
| 语种 | 中文 ; 中文 |
| 内容类型 | 会议论文 |
| 源URL | [http://hdl.handle.net/123456789/66417]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 汪长安,陈瑞峰,刘伟渊,等. 凝胶注模新工艺制备超轻质氧化铝陶瓷[C]. 见:第十五届全国复合材料学术会议, CNKI. |
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