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Citation: CHEN Bi-Qin, ZHANG Zhao-Quan, ZHANG Jing-Xian, LIN Qing-Ling, JIANG Dong-Liang. Processing of High Solid Content Hydroxyapatite Slurries and Gel-Casting[J]. Acta Physico-Chimica Sinica, ;2008, 24(05): 885-889. doi: 10.3866/PKU.WHXB20080526 shu

Processing of High Solid Content Hydroxyapatite Slurries and Gel-Casting

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 Date: 5 December 2007
Available Online: 27 February 2008

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.
- Hydroxyapatite; Gel-casting; Dispersion; Slurry
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