Effects of the crystal phase and microstructure of pottery bodies on the transmission characteristics of terahertz waves

Effects of the crystal phase and microstructure of pottery bodies on the transmission characteristics of terahertz waves

Blog Article

We recently reported that the terahertz (THz)-wave characteristics of pottery bodies varied significantly with firing temperature.This suggested the feasibility of conducting nondestructive inspection of the sinterability and manufacturing-process management of ceramics by THz-wave analysis.However, it is not clear why the THz-wave characteristics of ceramics change with firing Loaf Pan temperature.

In this study, we evaluated the THz-wave transmission properties of low-temperature-sintered porcelain bodies fired at various temperatures using THz time-domain spectroscopy and investigated the relationship between the crystal phase and microstructure.We found that the THz-wave transmittance increased with the dehydration of kaolinite and decreased with the General Purpose saddle formation of mullite and glass phases in the body.Also, as the firing temperature increased, the THz-wave transmittance of these bodies was affected by scattering due to the formation of pores.

Additionally, the refractive index in the THz range showed a good correlation with the bulk density.We established that the firing-temperature dependence of the refractive index in the THz range was related to the crystal phase and microstructure.