Influencing factors of transmittance of laser transparent ceramics

The main factors affecting the transmittance of laser transparent ceramics are studied. The effects of the scattering particles including inner pores and impurity particles, the difference of refractive index between the boundary and the grain in the boundary structure, as well as the boundary surface roughness on the transmittance of laser transparent ceramics are discussed. Moreover, the variation of the transmittance with pore size, porosity, relative refractive index of grain to boundary, and the surface roughness are analyzed quantitatively. The results indicate that the transmittance of the laser ceramics increases with the decreasing of porosity. The transmittance oscillates periodically with the increase of the pore size, and decreases obviously when the pore size and the wavelengt