烧结制度对SiO_2及Al_2O_3-SiO_2陶瓷膜性能的影响
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摘要
为了获得性能优良的无机陶瓷膜,以α-Al_2O_3为骨料,引入CuO-TiO_2复相烧结助剂,用挤压成型法制备氧化铝陶瓷支撑体;用溶胶-凝胶法制备SiO_2及Al_2O_3-SiO_2溶胶;采用浸渍提拉法在支撑体上覆膜,经干燥、烧结得到多孔氧化铝陶瓷膜,讨论烧结制度对SiO_2膜及Al_2O_3-SiO_2陶瓷膜性能的影响.结果表明,经此制备的SiO_2多孔陶瓷膜涂层附着力5A,孔隙率29.85%,纯水通量1 008.03L/m~2·h·MPa,抗折强度107.008 MPa,酸/碱腐蚀率0.77%/0.69%.Al_2O_3-SiO_2复合陶瓷膜涂层附着力5A,孔隙率30.17%,纯水通量960.82L/m~2·h·MPa,抗折强度105.463MPa,酸/碱腐蚀率0.82%/0.93%.经此烧结制度制备的SiO_2多孔陶瓷膜和Al_2O_3-SiO_2复合陶瓷膜表面结构均匀,膜层连续性、孔隙结构良好,具备良好的渗透性能.
In order to obtain inorganic ceramic membranes with excellent properties,α-Al_2O_3 is used as the aggregate,and the CuO-TiO_2 composite sintering aids are introduced to prepare alumina ceramic support by extrusion molding.SiO_2 and Al_2O_3-SiO_2 composite membrane are prepared by sol-gel method.Porous alumina ceramic support is covered with membrane by dipcoating.After drying and sintering,the porous alumina ceramic membrane with good perform-ance is obtained.The effect of sintering on the properties of SiO_2 and Al_2O_3-SiO_2 ceramic membrane is discussed.The results show that SiO_2 ceramic membrane have the following properties:coating adhesion is 5 A,porosity 29.85%,pure water flux 1 008.03 L/m~2·h·MPa,flexural strength 107.008 MPa,and acid/alkali corrosion rate 0.77%/0.69%.Al_2O_3-SiO_2 ceramic membranes have the following properties:coating adhesion is 5 A,porosity 30.17%,pure water flux 960.82 L/m~2·h·MPa,flexural strength 105.463 MPa,and acid/alkali corrosion rate 0.82%/0.93%.The SiO_2 porous ceramic membrane and Al_2O_3-SiO_2 composite ceramic membrane prepared have uniform surface structure,good continuity and pore structure,and permeability.
In order to obtain inorganic ceramic membranes with excellent properties,α-Al_2O_3 is used as the aggregate,and the CuO-TiO_2 composite sintering aids are introduced to prepare alumina ceramic support by extrusion molding.SiO_2 and Al_2O_3-SiO_2 composite membrane are prepared by sol-gel method.Porous alumina ceramic support is covered with membrane by dipcoating.After drying and sintering,the porous alumina ceramic membrane with good perform-ance is obtained.The effect of sintering on the properties of SiO_2 and Al_2O_3-SiO_2 ceramic membrane is discussed.The results show that SiO_2 ceramic membrane have the following properties:coating adhesion is 5 A,porosity 29.85%,pure water flux 1 008.03 L/m~2·h·MPa,flexural strength 107.008 MPa,and acid/alkali corrosion rate 0.77%/0.69%.Al_2O_3-SiO_2 ceramic membranes have the following properties:coating adhesion is 5 A,porosity 30.17%,pure water flux 960.82 L/m~2·h·MPa,flexural strength 105.463 MPa,and acid/alkali corrosion rate 0.82%/0.93%.The SiO_2 porous ceramic membrane and Al_2O_3-SiO_2 composite ceramic membrane prepared have uniform surface structure,good continuity and pore structure,and permeability.
引文
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[18]同帜,王婕,崔双科,等.CuO烧结助剂对陶瓷管支撑体性能的影响[J].膜科学与技术,2014,34(4):67-70.TONG Z,WANG J,CUI S K,et al.Effect of CuO sintering aids on the ceramic tube support performance[J].Chemical Engineering and Processing,2014,34(4):67-70.
[2]高炎,雷颖.我国水污染现状及治理方法深析[J].科技创新与应用,2014(36):124.GAO Y,LEI Y.Analysis of water pollution status and treatment methods in China[J].Technology Innovation and Application,2014(36):124.
[3]周玉芬,于淼,杨勇,等.MBR在我国应用现状与市场发展趋势[J].工业水处理,2010,30(7):5-7.ZHOU Y F,YU M,YANG Y,et al.Application and market prospect of membrane bioreactors in China[J].Industrial Water Treatment,2010,30(7):5-7.
[4]楚秀杰.MBR在我国水处理中的应用现状及发展前景[J].黑龙江科技信息,2015(30):20-21.CHU X J.Application status and development prospect of MBR in water treatment in China[J].Heilongjiang Science and Technology Information,2015(30):20-21.
[5]XIAO K,XU Y,LIANG S,et al.Engineering application of membrane bioreactor for wastewater treatment in China:Current state and future prospect[J].Frontiers of Environmental Science&Engineering,2014,8(6):805-819.
[6]孟广耀,陈初升,刘卫,等.陶瓷膜分离技术发展30年回顾与展望[J].膜科学与技术,2011,31(3):86-95.MENG G Y,CHEN C S,LIU W,et al.Ceramic membrane technology:30years retrospect and prospect[J].Membrane Science and Technology,2011,31(3):86-95.
[7]PABBY A K,RIZVI S S H,SASTRE A M.Handbook of membrane separations:Chemical,pharmaceutical,food,and biotechnological applications[M].New York:CRC Press,2008.
[8]STRATHRNANN H.Inorganic membranes synthesis[J].Chemical Engineering and Processing,1993,32(3):417-424.
[9]同帜,李迎,胡敏盾,等.烧结助剂对氧化铝陶瓷支撑体性能的影响[J].膜科学与技术,2015,35(5):42-46.TONG Z,LI Y,HU M D,et al.Effects of sintering agent on the properties of alumina ceramic support[J].Chemical Engineering and Processing,2015,35(5):42-46.
[10]李江,潘裕柏,宁金威,等.纳米晶添加氧化铝粉体的低温烧结研究[J].无机材料学报,2003,18(6):1192-1198.LI J,PAN Y B,NING J W,et al.Low temperature sintering of bimodal alumina powder mixtures with nanocrystalline component[J].Journal of Inorganic Materials,2003,18(6):1192-1198.
[11]同帜,朱庆鹏,李大川,等.烧成制度对多孔氧化铝陶瓷支撑体性能的影响[J].硅酸盐通报,2011,30(6):1440-1443.TONG Z,ZHU Q P,LI D C,et al.Effect of sintering temperature on the property of porous alumina ceramic membrane support[J].Bulletin of the Chinese Ceramic Society,2011,30(6):1440-1443.
[12]李大川,朱庆鹏,崔双科,等.圆板型多孔α-Al2O3陶瓷膜支撑体的制备与表征[J].环境工程学报,2012(3):941-944.LI D C,ZHU Q P,CUI S K,et al.Preparation and characterization of circular plate-shaped porous alumina ceramic membrane support[J].Chinese Journal of Environmental Engineering,2012(3):941-944.
[13]BLANDERGROEN B J,MALULEKE A,LINKOV V M.Electro conductive coatings on porous ceramic supports[J].Journal of Applied Electrochemistry,2003,33(2):475-481.
[14]CHENG X L,XU Y M,CAI Z.Preparation and gas-sensing property of ZnO nano-films[J].Chinese Journal of Inorganic Chemistry,2008,24(1):157-160.
[15]AKBAR E,AMENEH E.Investigation of superhydrophilic mechanism of titania nano layer thin lm-silica and indium oxide dopant effect[J].Bulletin of Materials Science,2012,35(8):137-142.
[16]HUO L H,LI Q,ZHAO H.Sol-gel route to pseudocubic shapedα-Fe2O3alcohol sensor:Preparation and characterization[J].Sensors and Actuators B,2005,10(7):915-920.
[17]王刚,尚华,管建波,等.烧结制度对BeO陶瓷性能的影响[J].真空电子技术,2014(5):72-75.WANG G,SHANG H,GUAN J B,et al.A brief analysis on the effect of sintering system on the properties of BeO ceramic[J].Vacuum Electronics,2014(5):72-75.
[18]同帜,王婕,崔双科,等.CuO烧结助剂对陶瓷管支撑体性能的影响[J].膜科学与技术,2014,34(4):67-70.TONG Z,WANG J,CUI S K,et al.Effect of CuO sintering aids on the ceramic tube support performance[J].Chemical Engineering and Processing,2014,34(4):67-70.