The Effect of Rheological Characteristics and Ingredients of Ceramic Slurry on Properties of Ceramic Foam Filter

The Effect of Rheological Characteristics and Ingredients of Ceramic Slurry on Properties of Ceramic Foam Filter
　　The study successfully prepared a high-quality ceramic foam filter using Al 2 O 3 as the main raw material, and kaolin, talcum powder and SiO2 as the additives by the polymeric sponge impregnation process.This study proceeded the theoretical and experimental analysis by referring to a large quantity of interrelated data, both domestic and international: first, tested ceramic slurry by a rotating rheometer and analyzed several influencing factors on rheological Ball Neodymium Magnets characteristic; then analyzed the experiment of reducing sintered temperature by high-temperature physical properties analysis and DTA on ceramic samples;after made a array of analysis towards the performances of the samples by testing open porosity, bulk density, banding strength and thermal shock resistance.etc; finally observed and analyzed the phases and microstructure of the samples using XRD and SEM.The optimal properties of slurry was required by impregnation a polyurethane sponge with ceramic slurry.
　　The high solid content, equality and stabilization, excellent rheological slurry can be obtained by using proper additives. In the study, the best ceramic slurry can be obtained by adding 0.2% quality content PAM; with the increase of the solid content, the viscidity of was higher; with the increase of shearing speed, the viscidity behavior index decreased, which http://www.chinamagnets.biz/ was typically pseudoplastic and the shear-thinning characteristics; the viscidity of ceramic slurry can be induced to shear-thinning and depend on time. The suspension exhibits positive thixotropy which satisfies impregnation.The experiment results proved that the starting liquid temperature of the sample without additives was about 1325℃and the starting liquid temperature of the sample adding Y 2 O 3 ,CeO 2 and MgO,TiO2 was about 1290℃. So additives for sinter can reduce sinter temperature.The important effect of sample properties for adding Y 2 O 3 , CeO2 and MgO,TiO2 were discovered in study. The contrast to effect of sample properties such as open porosity, bulk density, banding strength and thermal shock resistance was listed as follow: (Y 2 O 3 +CeO 2 )+(MgO+TiO 2 )>(Y 2 O 3 +CeO 2)