Preparation and characterization of highly porous Yb2SiO5 ceramics using water-based freeze-casting

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• 作者：Bingyu Han ; Rubing Zhang ; Daining Fang
• 关键词：Porous ceramics ; Freeze casting ; Ultra ; high porosity ; Mechanical properties
• 刊名：Journal of Porous Materials
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：23
• 期：2
• 页码：563-568
• 全文大小：1,498 KB
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• 作者单位：Bingyu Han (1)
  Rubing Zhang (1)
  Daining Fang (2)
  
  1. Department of Mechanics, School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China
  2. LTCS, College of Engineering, Peking University, Beijing, 100871, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Catalysis
  Characterization and Evaluation Materials
  Physical Chemistry
  
• 出版者：Springer Netherlands
• ISSN：1573-4854

文摘

This study introduces a new, highly porous Yb₂SiO₅ ceramic prepared using a water-based freeze-casting technique. The prepared porous Yb₂SiO₅ ceramic had ultra-high porosity (82–86 %) and tailored pore structures. The effects of sintering temperature on the pore structure, thermal conductivity, and mechanical properties of these ceramics were investigated. The sample with 15 vol% solid content prepared at 1450 °C had ultra-low linear shrinkage (4.85 %), ultra-high porosity (83.95 %), high compressive strength (2.15 MPa), and low thermal conductivity (0.121 W/m K). In addition, this sample showed a relatively high compressive strength (1.15 MPa) at 1500 °C. These results highlight the potential application of highly porous Yb₂SiO₅ ceramics as thermal insulator materials in ultra-high temperature environments.