CAJ | 학술논문

目的观察上釉前陶瓷不同的表面粗糙度对其上釉后最终表面光洁度的影响.方法将5组(n=12)烤瓷试件在注水条件下用碳化硅砂纸分别逐级打磨至220#、320#、600#、800#和1200#,常规上釉.上釉前、后分别测量表面粗糙度Ra,扫描电子显微镜定性分析表面形貌.结果 1200#砂纸打磨后上釉获得的表面最光滑(Ra=0.19μm),220#砂纸打磨后上釉的试件表面最粗糙(Ra=0.55μm),各组陶瓷上釉前后的表面粗糙度差异具有统计学意义(P<0.05);扫描电子显微镜分析结果与粗糙度仪测试结果一致.结论上釉前应对烤瓷表面进行细磨、抛光,以便在上釉后获得尽量光滑的表面.
목적 관찰상유전도자불동적표면조조도대기상유후최종표면광길도적영향.방법 장5조(n=12)고자시건재주수조건하용탄화규사지분별축급타마지220#、320#、600#、800#화1200#,상규상유.상유전、후분별측량표면조조도Ra,소묘전자현미경정성분석표면형모.결과 1200#사지타마후상유획득적표면최광활(Ra=0.19μm),220#사지타마후상유적시건표면최조조(Ra=0.55μm),각조도자상유전후적표면조조도차이구유통계학의의(P<0.05);소묘전자현미경분석결과 여조조도의측시결과 일치.결론 상유전응대고자표면진행세마、포광,이편재상유후획득진량광활적표면.
Objective To evaluate the influence of different surface roughness on final surface texture of glazed ceramic. Methods Sixty porcelain discs were fabricated and randomly divided into five groups (n=12), which were sequentially grounded with water-cooled sandpapers of decreasing abrasiveness (220# , 400# , 600# , 800# and 1200# grit), and then all the specimens were glazed. Before and after glazing, the surface roughness (Ra) μm of the same specimens were evaluated quantitatively with profilometer and qualitatively using scanning electron microscopy (SEM). Results The smoothest surfaces were obtained with 1 200# sandpapers griting prior to overglazing (Ra =0. 19 μm),and 220# sandpapers griting prior to overglazing displayed the roughest surfaces (Ra =0. 55 μm) ; each group displayed significant difference before and after glazing (P < 0. 05). The images obtained through SEM were consistent with the profilometer readings. Conclusions The results suggest that decreasing the surface roughness of dental ceramic prior to glazing is of great importance in order to obtain the smoothest surface after glazing.