TY  - JOUR
AU  - CHENG, Ziqiang
AU  - CHEN, Yanxinyu
AU  - ZHAO, Yongsong
AU  - SHAO, Haoran
AU  - ZHOU, Dayu
PY  - 2023
TI  - Titanium Dioxide Porous Ceramics Prepared with Freeze Casting
JO  - Journal of Ceramics
SN  - 2095-784X
SP  - 1168
EP  - 1175
VL  - 44
IS  - 6
AB  - The effects of freezing rate, slurry concentration and freezing method on microstructure and anisotropy of mechanical properties of TiO2 porous ceramics were studied. With increasing concentration of slurry (10–25 vol.%), both porosity and average interlayer spacing of the porous ceramics were decreased. The freezing rate mainly affects the average interlayer spacing by varying the growth mode of ice crystals. In the bidirectional freezing casting process, cross-sectional orientation of the porous ceramics tends to be more consistent with increasing wedge angle. With increasing slurry concentration and freezing rate, the Vickers hardness and compressive strength of the TiO2 porous ceramics in different directions are increased as a whole, but the increase degree in different directions is different, as the wedge angle increases (0°–20°) and the anisotropy of the compressive strength of the porous ceramics becomes more prominent, which is increased from 12.15 to 64.91 MPa in x direction. The TiO2 porous ceramics have great application potential in the fields of biological bone tissue materials and ceramic filters.
UR  - https://doi.org/10.13957/j.cnki.tcxb.2023.06.012
DO  - 10.13957/j.cnki.tcxb.2023.06.012