掺杂Co_2O_3及制样压力对SiC多孔陶瓷支撑体性能的影响  

Effect of doping Co_2O_3 on the properties of SiC porous ceramic support

作　　者：董又铭 邓湘云 徐成世 王艳颖 刘阳 DONG Youming;DENG Xiangyun;XU Chengshi;WANG Yanying;LIU Yang(College of Physics and Materials Science,Tianjin Normal University,Tianjin 300387,China)

机构地区：[1]天津师范大学物理与材料科学学院,天津300387

出　　处：《天津师范大学学报（自然科学版）》2019年第1期19-22,62,共5页Journal of Tianjin Normal University：Natural Science Edition

基　　金：精细过滤膜材料的制备技术"横向课题资助项目(53H14049)

摘　　要：为了优化碳化硅(SiC)多孔陶瓷材料的性能,通过对支撑体掺杂Co_2O_3以提高其高温强度、热抗震性能和抗弯强度,利用X线衍射仪(XRD)、扫描电镜(SEM)、过滤压降测试系统和YLN-电子压力机分别对烧结后支撑体的物相结构、表面形貌、过滤压降及抗弯强度等性能进行测试分析,并应用阿基米德法测试支撑体的气孔率.实验结果表明:Co_2O_3掺杂支撑体经过高温烧结后,莫来石相衍射峰增多,过滤压降提高5%～10%,气孔率从33.02%降至27.25%,支撑体的抗弯强度从33.06 MPa提高到40.84 MPa.当制条压力和制片压力分别为3.5和11.5 MPa时,样品的抗弯强度最高,为44.1 MPa,气孔率为26.79%.In order to optimize the properties of SiC porous ceramics,the high temperature strength,thermal seismic resistance and flexural strength of the support were improved by doping Co2O3 into the support.The phase structure,surface morphology,filtration pressure drop and bending strength of the sintered support were measured and analyzed by X-ray diffractometer,scanning electron microscope(SEM),filtration pressure drop test system and YLN-electronic press,respectively.The porosity of the support was measured by Archimedes method.The experimental results show that the diffraction peak of mullite phase increases and the envelope peak of glass phase decreases after high temperature sintering of the Co2O3 doped support.The filter pressure drop is increased by 5%-10%,the porosity is reduced from 33.02%to 27.25%,and the bending strength of the support is increased from 33.06 MPa to 40.84 MPa.The maximum bending strength is 44.1 MPa and the porosity is 26.79%when the strip pressure is 3.5 MPa and the sheet pressure is 11.5 MPa.

关 键 词：Co2O3掺杂 SiC多孔陶瓷支撑体 过滤压降 气孔率 抗弯强度 

分 类 号：O369[理学—流体力学]