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.
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