【摘要】 材料的光学特性包括无限光学厚度、吸收系数、散射系数等.是表征材料颜色、半透明度的重要指标。本研究应用Kubelka-Munk理论考察了Plat铸造陶瓷的光学特性。结果表明:Plat铸造陶瓷的吸收系数较小,与波长关系不明显;而微射系数较大,随着波长的增加而逐渐减小;对比率的变化正好与透射率相反,随着波长的增加,对比率减小。Plat铸造陶瓷材料的无限光学厚度为5～6mm。更多还原

【Abstract】 The optical properties of materials in-clude optical thickness(IOT) .absorption coef-ficient(K) and scattering coefficient (S) .etc. This study was directed to investigate the op-tical properties of Plat castable ceramics by Kubelka ?Munk theory. By reflectance measurement of the samples on white and black backings.we calculated the K.S.contrast ratio (CR) and TUT of Plat castable ceramics. The results demonstrated that the absorption coefficient of Plat castable ceramics was lower and the scattering coefficient of Plat castable ceramics was lower and the scattering coefficient higher which was decreased with the increase of wavelenth. The IOT of Plat castable ce-ramics is 5 ?6mm which indicated that the Plat castable ceramics are more transkucent and the color of restorations may be influenced bv cement color.更多还原