Low Thermal Conductivity Ceramics for Thermal Barrier Coatings
This paper summarizes the basic properties of a series of rare-earth zirconate ceramics (Gd2Zr2O7, Sm2Zr2O7, Dy2Zr2O7, Er2Zr2O7 and Yb2Zr2O7). The phases and microstructures were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Thermal properties of these materials were determined. The results indicated that Sm2Zr2O7 rare-earth zirconate ceramics have the lower thermal conductivity and the highest thermal expansion coefficient than other rare-earth zirconate ceramics. The dielectric constant decreases with the increase of atomic number.
Wei Pan and Jianghong Gong
Y. X. Qin et al., "Low Thermal Conductivity Ceramics for Thermal Barrier Coatings", Key Engineering Materials, Vols. 336-338, pp. 1764-1766, 2007