Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (05): 885-889.doi: 10.3866/PKU.WHXB20080526

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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

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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