Effects Of Metal Oxides On The Of Porous Alumina Ceramic Supporting Body

Single tubeα-Al₂O₃ ceramic supporting-body were prepared by flow-forming and molten mold core method through usingα-Al₂O₃ as aggregate,carboxymethyl cellulose（CMC）as porogen and adhesive,glycerol as lubricant and plasticizer,CuO-TiO₂,Cu₂O-TiO₂,CuO-TiO₂-Ag₂O as sintering additives.Influence of property of supporting-body were studied by the addition of carboxymethyl cellulose,glycerol,sintering additives and sintering system.The sample were characterized by thermal gravimetric analysis（TG-DTG）,X-ray diffraction（XRD）,scanning electron microscopy（SEM）and self-assembly equipments.The results show that:（1）Drying system of wet blank supporting body are as follows:temperature is30℃,humidity of 30%RH,drying time is 48 h;（2）Sintering System:heating at a rate of 12,6,12,4℃/min respectively in30²00℃,200³50℃,350⁸00℃,800¹200℃,insulating 0.5 h at 350 and 2h at1200℃,cooling to room temperature.Like this,you can get a good apparent structure sample with no cracking.（3）Both of the optimum added amount of CMC and glycerol are 3.0%（wt%）.（4）TiO₂-CuO、TiO₂-Cu₂O and CuO-TiO₂-Ag₂O can promote the sintering to prepared a good performance single tubeα-Al₂O₃ ceramic supporting-body.The porosity,pure water flux,bending strength and acid/alkali corrosion weight loss of the supporting-body are 33.42%,7927.87 L/m²·h·MPa,81.47MPa,0.97/1.22%and31.97%,6880.72 L/m²·h·MPa,75.47MPa,1.06/1.14%respectively when the optimum addition of Cu₂O and Ag₂O are 0.7%（wt%）and 1.0%（wt%）.