对水基料浆冷冻浇注成型多孔陶瓷中孔隙结构特征进行了探讨.研究发现:采用水基料浆冷冻浇注成型的多孔陶瓷孔隙为薄片状或层状,这构成了冷冻浇注成型多孔陶瓷的基本形貌特征.较快的冷冻速率可以减小冷冻浇注成型多孔陶瓷的孔径尺寸.料浆中粉体颗粒特别是微小颗粒的存在会对结冰形貌产生影响,颗粒粒径减小会导致冰晶尺寸减小,相应的孔径变小;但尺寸在几十纳米的微小颗粒会促进冰晶生长,导致孔径变大.
参考文献
[1] | Takayuki Fukasawa;Zhen-Yan Deng;Motohide Ando .Synthesis of Porous Silicon Nitride with Unidirectionally Aligned Channels Using Freeze-Drying Process[J].Journal of the American Ceramic Society,2002(9):2151-2155. |
[2] | Takayuki Fukasawa;Motohide Ando;Tatsuki Ohji .Synthesis of Porous Ceramics with Complex Pore Structure by Freeze-Dry Processing[J].Journal of the American Ceramic Society,2001(1):230-232. |
[3] | Beppu Y;Ando M;Ohji T.Fabrication of Highly Porous Silicate Ceramics by Freeze-drying[A]. |
[4] | Jie Tang;Yufeng Chen;Hua Wang;Hailin Liu;Qisheng Fan .Preparation of Oriented Porous Silicon Carbide Bodies by Freeze-Casting Process[J].Key engineering materials,2005(2):1287-1290. |
[5] | Victor F Petrenko;Robert W Whitworth.Physics of Ice[M].Oxford,New York:Clarend on Press,1999 |
[6] | Landi E;Valentini F;Tampieri A .Porous hydroxyapatite/gelatine scaffolds with ice-designed channel-like porosity for biomedical applications.[J].Acta biomaterialia,2008(6):1620-1626. |
[7] | W.M. Parksa;Y.B. Guo .A casting based process to fabricate 3D alginate scaffolds and to investigate the influence of heat transfer on pore architecture during fabrication[J].Materials science & engineering, C. Biomimetic and supramolecular systems,2008(8):1435-1440. |
[8] | 陶涛,彭晓峰,朱敬平,李笃中.污泥冷冻冰晶与颗粒团相互作用的可视化实验[C].中国工程热物理学会传热传质学学术会议论文集,2002:377-380. |
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