| 基于冰模板导向的Al_2O_3多孔陶瓷制备 |
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| 引用本文： | 何俊升,冯小明,艾桃桃.基于冰模板导向的Al_2O_3多孔陶瓷制备[J].铸造技术,2011(3). |
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| 作者姓名： | 何俊升 冯小明 艾桃桃 |
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| 作者单位： | 陕西理工学院材料科学与工程学院; |
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| 基金项目： | 陕西高校省级重点实验室科研项目(2010JS040); 陕西省教育厅专项科研计划项目(2010JK467) |
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| 摘 要： | 以冰为造孔模板,采用冷冻铸造法制备Al2O3多孔陶瓷,用扫描电镜(SEM)观察孔结构,并测量气孔率和抗压强度。结果表明:通过调整工艺参数,气孔率可控制在24%~85%之间,形成了蜂窝状结构。随浆体浓度的增大,气孔率降低,抗压强度增大。抗压强度随烧结温度的升高而增大。当气孔率最大达85%时,抗压强度为21 MPa。
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| 关 键 词： | 冷冻干燥 气孔率 抗压强度 |
Al_2O_3 Porous Ceramics Prepared by Preezing-Casting Process Using Ice as Templates |
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| HE Jun-sheng,FENG Xiao-ming,AI Tao-tao.Al_2O_3 Porous Ceramics Prepared by Preezing-Casting Process Using Ice as Templates[J].Foundry Technology,2011(3). |
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| Authors: | HE Jun-sheng FENG Xiao-ming AI Tao-tao |
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| Affiliation: | HE Jun-sheng,FENG Xiao-ming,AI Tao-tao(School of Materials Science and Engineering,Shaanxi University of Technology,Hanzhong 723003,China) |
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| Abstract: | Porous alumina ceramics were fabricated by freezing casting process using ice as pore-creating template.The microstructures of the samples were observed by SEM,the porosity and the compressive strength were also investigated.The results indicate that the porosity can be changed from 24% to 85% by controlling the process parameters,and SEM image presents cellular structure.The porosity is decreasing and the compressive strength is increasing with increasing the slurry concentration.The compressive strength i... |
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| Keywords: | Freezing-drying process Porosity Compressive strength |
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