Preparation and Performance of Zirconia Fiber Board

摘要

Zirconia fiber can be used for a long time in 1600°C, and with has low thermal conductivity at high temperature. Due to the excellent insulation performance, it has a broad application prospect in aerospace, aviation, energy and other areas. In the present study, we chose yttrium stabilized zirconia fibers and nanometer zirconia powder as main material and adding soluble starch, zirconium sol as low temperature and high temperature binder. Rigid zirconia fiber board was prepared by material slurry, filter shaping, stripping drying and high temperature calcination. After high temperature calcination of 1600°C for 12h, sample pore were mainly concentrated in 25-75μm, bending strength performance was best when the adding amount of nanometer zirconia powder was 7%, the thermal conductivity is only 0.132 W·m~(-1)·K~(-1) at 1400°C.