Study On Cordierite Honeycomb Ceramics Reinforced By Ceramic Fiber

Honeycomb ceramics are widely used in denitration catalyst carrier, heat storage carrier and automobile exhaust gas catalytic purifier_ 2O_ 3•5SiO_ 2) Cordierite honeycomb ceramics with high mechanical strength, coefficient of thermal expansion, good thermal shock resistance, low stability and good chemical resistance are always the preferred materials for honeycomb ceramics. Cordierite crystals show anisotropic thermal expansion, so it is of great significance to prepare cordierite honeycomb ceramics arranged in a certain direction. Firstly, Mg (OH) is used in this paper_ 2,A1_ 2O_ 3,SiO_ 2 as the raw material, the fiber-reinforced cordierite ceramic material was prepared by introducing a proper amount of alumina silicate ceramic fiber. The phase composition analysis and microstructure observation were carried out to explore the feasibility and technological conditions of the template growth method for the formation of fibrous cordierite, At the same time, the effect of ceramic fiber on the properties of cordierite honeycomb ceramics was studied. The results show that after the introduction of aluminum silicate ceramic fiber, the cordierite phase can be formed by reaction with fiber as template under the condition of 1300 ℃ for 5 hours. The cordierite phase in honeycomb ceramics prepared by extrusion method has the characteristics of directional arrangement, low thermal expansion coefficient and high mechanical properties.