Lanthanum–Cerium Oxide as a Thermal Barrier‐Coating Material for High‐Temperature Applications

Abstract

an optical fiber and the circular polarization of the transmitted light was measured. The circular differential absorbance can then be calculated. Film thickness was determined using a Tencor P10 surface profilometer. AFM experiments were performed under ambient conditions in tapping mode. Microfabricated silicon cantilevers with a spring constant of 5 N m ±1 were used.

Effects of post-deposition annealing temperature and time on physical properties of metal-organic decomposed lanthanum cerium oxide thin film

“…As the annealing temperature increases to higher temperatures (600-1000 °C), four diffraction peaks are detected. These peaks are similar to that of pure CeO 2 because La x Ce y O z is the solid solution of La 2 O 3 in CeO 2 with fluorite type [35]. The XRD patterns of MOD-derived CeO 2 films on Si substrate [22] are included in Fig.…”

“…Formation of La 2 Ce 2 O 7 has been reported in previous literatures but it is mainly used for thermal barrier coating due to the fascinating properties, such as low thermal conductivity, high melting point, and thermal expansion match with the underlying substrate that it offers [35][36][37][38]. Since there is no pertinent investigation on the employment of La x Ce y O z as a gate oxide material, it is of interest to investigate the performance of La x Ce y O z for future integration in MOS-based devices.…”

Advanced Ceramic Materials for High Temperature Applications

“…Zirconia-free lanthanum containing compositions with different crystallographic structures, as fluorite lanthanum cerate (La 2 Ce 2 O 7 ) [50] or magnetoplumbite lanthanum hexaaluminate (LaMgAl 11 O 19 ), [51] have been proposed as substitutes of YSZ because their low thermal conductivity and high thermal stability. Actually, the cerate does not present phase transformation after long-term annealing at 1400°C and, at the same time, has a large TEC that is close to the bond-coat layer one even at high temperature.…”

Hollow Fibers of Lanthanum Cerium Oxide Prepared by Electrospinning

“…[6] The properties of low thermal conductivity and large thermal expansion coefficient close to that of the bond coating are the major reasons that it is believed to have potential as a TBC material for high temperature applications. After long-term annealing at 1400°C, LC was still stable without phase transformation, indicating that LC appears to be also a promising candidate for the catalyst support of combustion.…”