Porous Y₂SiO₅ Ceramic with Low Thermal Conductivity

Duanyang Li 1,2) and Meishuan Li 1) 1) High Performance Ceramic Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China 2) Graduate School of Chinese Academy of Sciences, Beijing 100039, China

摘 要：Porous Y2SiO5 ceramic was fabricated by freeze casting with tert-butyl alcohol as solvent. The porous Y2SiO5 ceramic possessed long straight pore structure. With decreasing solid loading from 20 to 10 vol.%, the porosity of the Y2SiO5 ceramic increased linearly from 45% to 72%, while the compressive strength declined from 23.2 to 3.1MPa. The thermal conductivity of Y2SiO5 decreased from 1.34W/mK for the dense bulk to 0.05 W/mK for the porous body with a porosity of 57%.

关键词：