Hydrothermal synthesis of ytterbium silicate nanoparticles.
A simple, low-cost hydrothermal method was developed to synthesize 20-nm-diameter single-crystalline ytterbium silicate (Yb(2)Si(2)O(7) and Yb(2)SiO(5)) nanoparticles at 200 degrees C. This is nearly 1000 degrees C lower than that for the typical sol-gel route to ytterbium silicate powders. Obtained powders showed very low thermal conductivity, a suitable thermal expansion coefficient, and excellent thermal/structural stability, suggesting a potential application to environmental and thermal barrier coatings. Special focus was placed on assessing the hydrothermal reaction mechanism for particle formation.
Chen
Hongfei
H
Shanghai Institute of Ceramics (SIC), Chinese Academy of Sciences (CAS), 1295 Dingxi, Changning, Shanghai 200050, China.
Gao
Yanfeng
Y
Liu
Yun
Y
Luo
Hongjie
H