物理化学学报 >> 2008, Vol. 24 >> Issue (05): 885-889.doi: 10.3866/PKU.WHXB20080526

研究简报 上一篇    下一篇

高固相含量羟基磷灰石浆料的制备及凝胶浇注成型

陈碧钦; 张兆泉; 张景贤; 林庆玲; 江东亮   

  1. 中国科学院上海硅酸盐研究所, 高性能陶瓷和超微结构国家重点实验室, 上海 200050
  • 收稿日期:2007-12-05 修回日期:2008-01-18 发布日期:2008-05-05
  • 通讯作者: 江东亮 E-mail:dljiang@sunm.shcnc.ac.cn

Processing of High Solid Content Hydroxyapatite Slurries and Gel-Casting

CHEN Bi-Qin; ZHANG Zhao-Quan; ZHANG Jing-Xian; LIN Qing-Ling; JIANG Dong-Liang   

  1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China
  • Received:2007-12-05 Revised:2008-01-18 Published:2008-05-05
  • Contact: JIANG Dong-Liang E-mail:dljiang@sunm.shcnc.ac.cn

PDF

3080

赞

摘要： 为提高羟基磷灰石(HAP)浆料在水分散体系中的稳定性, 获得良好的固化性能, 采用二甲基丙烯酰胺(DMAA)作为单体, N,N’-亚甲基双丙稀酰胺(MBAM)作为交联剂, 偶氮二咪唑啉丙烷(AZIP)为引发剂, 研究了不同分散剂含量和不同固相含量HAP浆料的流变性. 使用自制的亚微米级粉体原料, 制备了固相含量高达55%(体积分数)的稳定浆料, 并成功实现了浇注成型. 获得相对密度高达57.5%的素坯, 其抗压强度、抗弯强度最高值分别达到(37.0±6.5)和(13.8±1.0) MPa. 经1250 ℃无压烧结2 h, HAP陶瓷具有优良的烧结性能, 相对密度为98.7%, 抗弯强度和弹性模量分别达到了(85.3±9.9) MPa 和(133.0±10.2) GPa.

关键词: 羟基磷灰石, 凝胶浇注成型, 分散, 浆料

Abstract: An aqueous gel-casting of hydroxyapatite using a new polymeric system was investigated. The monomer, cross-linker, and initiator were dimethylacrylamide (DMAA), N,N’-methylenebisacrylamide (MBAM), and 2,2’-azobis [2-(2-imidazolin-2-yl)propane] (AZIP, respectively). The rheological properties of the gel-casting slurries and influencing factors were studied. The relative density, compressive strength, and flexural strength of green body were 57.5%, (37.0±6.5), and (13.8±1.0) MPa, respectively. After presureless sintering at 1250 ℃ for 2 h, the relative density of the final product is about 98.7%. Bending strength and elasticity modulus are (85.3±9.9) MPa and (133.0±10.2) GPa, respectively.

Key words: Hydroxyapatite, Gel-casting, Dispersion, Slurry