硅酸盐学报

空心球包覆处理制备氧化铝多孔陶瓷

单位：1.大连交通大学材料科学与工程学院辽宁大连116028 2.清华大学材料学院北京100084

关键词：氧化铝空心球助烧剂力学性能微观结构

分类号：TB32

出版年,卷(期):页码：2014,42(9):1134-1139

DOI：10.7521/j.issn.0454－5648.2014.09.09

摘要：

采用浆料浸渍法在氧化铝空心球表面包覆高岭土和滑石粉(质量比为2∶3)，利用高岭土和滑石粉引入的MgO－SiO2－Al2O3作为助烧剂，采用干压成型工艺制备氧化铝空心球多孔陶瓷，研究了高岭土和滑石粉包覆量对氧化铝空心球多孔陶瓷性能的影响。结果表明：随高岭土和滑石粉包覆量的增加，氧化铝空心球多孔陶瓷的相对密度、收缩率、抗弯强度和断裂韧性先减小后增大；当滑石粉和高岭土包覆量为11.5%(质量分数)时，氧化铝空心球多孔陶瓷的相对密度、线收缩率、抗弯强度和断裂韧性均分别达到最大值0.77、26%、177MPa和3.08MPa•m1/2。包覆后的氧化铝空心球多孔陶瓷的抗弯强度是未包覆的3倍。包覆适量高岭土和滑石粉明显改善了氧化铝空心球的界面结合强度。

Alumina hollow spheres (AHSs) were coated with a mixture of kaolin and talcum in a mass ratio of 2∶3 and MgO－SiO2－Al2O3 sintering additives were introduced via slurry impregnation to improve the interface bonding strength between AHSs. The AHS porous ceramics were fabricated with the coated AHSs by a dry pressing process. The effect of kaolin and talcum coating contents on the properties of AHS porous ceramics was investigated. The relative density, shrinkage percentage, bending strength and fracture toughness of AHS porous ceramics firstly increase and then decrease with the increase of kaolin and talcum coating content. When kaolin and talcum coating content is 11.5%, the relative density, shrinkage percentage, bending strength and fracture toughness of AHS porous ceramics are 0.77, 26%, 177MPa and 3.08MPa•m1/2, respectively. The bending strength of the coated AHS porous ceramics is increased by two times, comparing to the uncoated AHS porous ceramics. The appropriate coated amount of kaolin and talcum can significantly improve the interface bonding strength between AHSs.

基金项目：

国家自然科学基金(51172120)；中国博士后科学基金(2012M510430和2013M530618)资助项目。

作者简介：

第一作者：徐星星(1986—)，男，硕士研究生。通信作者：杨金龙(1966—)，男，博士，教授。

参考文献：

[1]　吴海波，袁波，韩建燊，等.多孔陶瓷材料的制备研究进展[J].耐火材料，2012, 46(3)：230－235.
　　　WU Haibo, YUAN Bo, HAN Jianshen, et al. Refractories (in Chinese), 2012, 46(3): 230－235.
[2]　曾令可，胡动力，税安泽，等.多孔陶瓷制备新工艺及其进展[J].中国陶瓷，2007, 43(4): 3－6.
　　　ZENG Lingke, HU Dongli, SHUI Anze, et al. China Ceram(in Chinese), 2007, 43(4): 3－6.
[3]　SAMBORSKI S, SADOWSK T. Dynamic fracture toughness of porous ceramics ［J］.J Am Ceram Soc, 2010, 93(11): 3607－3609.
[4]　COCHRAN J K. Ceramic hollow spheres and their applications ［J］. Curr Opin Solid State Mater Sci, 1998, 3(5): 474－479.
[5]　欧鹏飞，王帅，钟宏，等.多孔陶瓷材料的制备与应用研究进展[J].广州化工，2010, 38(7): 11－13.
　　　OU Pengfei, WANG Shuai, ZHONG Hong, et al. Guangzhou Chem Ind(in Chinese), 2010, 38(7): 11－13.
[6]　曾令克，王慧，罗民华，等．多孔功能陶瓷制备与应用[M].化学工业出版社，2006：26－30.
[7]　SCHWARTZWALDER K. Method of making porous ceramic articles ［P］.U S. Patent, 3090094.1963－5－21.
[8]　SHAO Y, JIA D, LIU B. Characterization of porous silicon nitride ceramics by pressureless sintering using fly ash cenosphere as a pore－forming agent ［J］. J Eur Ceram Soc, 2009, 29(8): 1529－1534.
[9]　MEYER R, WEITZING H, XU Q, et al. Lead zirconate titanate hollow－sphere transducers［J］. J Am Ceram Soc, 1994, 77(6): 1669－1672.
[10]　李建林，江东亮，潭寿洪.高强空心粒子增韧增强陶瓷材料[J].硅酸盐学报，1999, 27(5): 631－636.
　　　LI Jianlin, JIANG Dongliang, TAN Shouhong. J Chin Ceram Soc, 1999, 27(5): 631－636.
[11]　YANG J, CAI K, XI X, et al. Process and Device for the Preparation of Hollow Microspheres [P].PCT/CN, 2010/000538.
[12]　牛同健，余娟丽，刘炜，等.空心球对氧化铝陶瓷性能的影响[J].硅酸盐学报，2012, 40(4): 507－512.
　　　NIU Tongjian, YU Juanli, LIU WEI, et al. J Chin Ceram Soc, 2012, 40(4): 507－512.
[13]　WU Jiamin, ZHANG Xiaoyan, YANG Jinlong. Novel porous Si3N4 ceramics prepared by aqueous gel－casting using Si3N4 poly－hollow microspheres as pore－forming agent ［J］. J Eur Ceram Soc, 2014, 34(5)：1089－1096.
[14]　李悦彤，杨静.氧化铝陶瓷低温烧结助剂的研究进展[J].硅酸盐通报，2012，30(6): 1328－1332.
　　　LI Yuetong, YANG Jing. Bull Chin Ceram Soc (in Chinese)， 2012, 30(6): 1328－1332.
[15]　丁君，杨秋红，曾智江.透明氧化铝陶瓷的制备和体视学在其性能表征中的作用[J].上海大学学报(自然科学版), 2006, 12(3): 292－297.
　　　DING Jun, YANG Qiuhong, ZENG Zhijiang. J Shanghai Univ(Nat Sci) (in Chinese), 2006, 12(3): 292－297.

服务与反馈：

【文章下载】【加入收藏】