Fabrication And Study Of Alumina Fiber Reinforced Andalusite Composite

Taking the andalusite from South Africa and alumina fiber as raw materials, adding aluminum sulphate as binder, fabrication and properties of alumina fiber reinforced andalusite composite was studied through wet dispersion, mould pressing and sintering processes. Mechanical properties were tested and the influence of particle size, sintering temperature, and fiber content on property of the material was studied by the means of X-ray diffraction, OM and SEM.Results show that:(1) For each particle size of andalusite, variation tendency of the properties of the material is generally the same: the maximum of bulk density, compressive strength and rupture strength appears in the range of 5%-10% content of fiber, these properties of the material remarkably decrease as the fiber content exceed 10%; while at the same fiber content, the properties of the material increase with the increase of firing temperature.(2) The properties of the material with finer andalusite particle size are superior to those of coarse particle size at lower temperature, but properties of material of fine and coarse particle size have little difference at higher temperature. This illustrates that the andalusite particle size can lower the sintering temperature and that it brings forth not remarkable influence on the property of the material when the material is sintered completely...