초록 열기/닫기 버튼
In order to increase the bone bonding-ability and biocompatibility of zirconia-based implants, the surface roughness must behigh. In this study, we tried to improve the surface roughness of the zirconia substrates by surface modification using two typesof zirconia slurry and spin coating. We also investigated to the effect of repeated coating times on the surface roughness ofcoating layer. Coating layers fabricated by slurry and spin coating showed uniform thickness and dense microstructure. Asincreasing the repeated coating times, the thickness of coating layer gradually increased from 0.7 to 1.7 μm in case of smallparticles or from 0.9 to 2.0 μm in case of large particles. Slurry containing small particles (~ 40 nm) had low viscosity and goodforming-ability of coating films, but the improvement of surface roughness by slurry coating was not high. Roughnessenhancement on coated layer in zirconia slurry containing large particles (~100nm) was higher than that of small particles atthe same processing condition. In this study, 4 times coating specimen showed maximum surface roughness of Ra 0.36 μm in3Y-TZP powder containing large particles, or Ra 0.27 μm in that of small particles.
