Porous ceramics obtained from strontium zirconate

An attempt is made to obtain a two-layer refractory material of strontium zirconate consisting of a high density sintered layer and a porous one. Initial components for the synthesis are strontium carbonate, zirconium dioxide and baddeleyite powder. The synthesis is carried out in the temperature range of 1400-1700 deg C. The material of high density layers is produced by polystyrene additions burning-out. X-ray diffraction analysis and microstructural studies show that the ceramic obtained is single-phase, with uniform fine-grained structure in high density layers. In porous layers spherical (1-2 mm) and channel-type (5μ in diameters pores with sharp surface roughness are observed. The data on thermal conductivity and high temperature creep testify that the strontium zirconate ceramics is of high quality)