Effects of Doping CeO₂, Er₂O₃ on Properties of TiO₂-SiO₂ Ceramics for Catalyst Supporter of deNO_x

Effects of doping CeO₂ and Er₂O₃ on the mechanical strength, thermal expansion coefficient, sintering temperature of TiO₂-SiO₂ ceramics were investigated. The experimental results and the microscopic analysis of SEM, XRD, TG-DSC, FT-IR and TEM show that adding CeO₂ and Er₂O₃ into TiO₂-SiO₂ ceramics can prohibit the growth of its crystal grains, make their size uniform and form them into a dense structure, which finally enhance its mechanical behaviors, and the lower thermal expansion coefficient that leads to an excellent property of thermal shock resistance. After the reforming TiO₂-SiO₂ ceramics doped by CeO₂ was sintered at 1380 °C, the bending strength reached to 83 MPa, and the thermal expansion coefficient was 9.8 × 10^-6/°C within the temperature range of 25 ∼ 800 °C, which provides a promising basis of making equipped honeycomb catalyst of deNo_x.