Abstract
The (La1−xYbx)2AlTaO7 ceramics were synthesized by pressureless sintering process at 1600°C for 10h in air. The crystal phase, microstructure and thermophysical properties were investigated. Results show that pure (La1−xYbx)2AlTaO7 cermics with single weberite structure are prepared successfully. Owing to the reduction of crystal-lattice tolerance-factor, the thermal conductivity of (La1−xYbx)2AlTaO7 (x>0) ceramics increases with increasing Yb2O3 fraction at identical temperatures, which is lower than that of La2AlTaO7. Due to the relatively high electro-negativity of Yb element, the addition of Yb2O3 increases the thermal expansion coefficient of (La1−xYbx)2AlTaO7 ceramics.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
