Abstract: HAP whiskers were prepared and surface modified via silicon Sol which formed SiO2 particles on the whisker , then the surface modified HAP whiskers were mixed into methacrylate ester to prepare resin composite.Silica modification relied on the silica sol which forms droplets of gel combined with whisker on the surfaces and forming a strong bond via heat treatment.XRD patterns, FT-IR spectroscopy and SEM were applied in order to character the micro-structure and bond nature as well as the surface phase composition.It is shown that SiO2 particles adhered on the surfaces of HAP whiskers, raising the calcination temperature significantly increased the amounts of SiO2 particles as well as the particle size.The bending strength of the resin material is increased following the raising of calcining temperature treated on modified whiskers.The resin sample prepared by the raw material of HAP whiskers calcined at 600 ℃obtained the highest bending strength, which measured 89.46 MPa.

Key words: HAP whiskers were prepared and surface modified via silicon Sol which formed SiO2 particles on the whisker , then the surface modified HAP whiskers were mixed into methacrylate ester to prepare resin composite.Silica modification relied on the silica sol which forms droplets of gel combined with whisker on the surfaces and forming a strong bond via heat treatment.XRD patterns, FT-IR spectroscopy and SEM were applied in order to character the micro-structure and bond nature as well as the surface phase composition.It is shown that SiO2 particles adhered on the surfaces of HAP whiskers, raising the calcination temperature significantly increased the amounts of SiO2 particles as well as the particle size.The bending strength of the resin material is increased following the raising of calcining temperature treated on modified whiskers.The resin sample prepared by the raw material of HAP whiskers calcined at 600 ℃obtained the highest bending strength, which measured 89.46 MPa.