Thermal properties of RE 2 AlTaO 7 (RE = Gd and Yb) oxides
Source abstract
Abstract
Abstract In the current paper, the synthesis of RE 2 AlTaO 7 (RE = Gd and Yb) oxides was performed through a high-temperature sintering method using Gd 2 O 3 , Yb 2 O 3 , Al 2 O 3 and Ta 2 O 5 as raw chemicals. The phase-structure, micro-morphology and thermal-physical properties of RE 2 AlTaO 7 (RE = Gd and Yb) oxides were analyzed. The RE 2 AlTaO 7 (RE = Gd and Yb) oxides exhibit single pyrochlore-type crystal-structure. Compared to Yb 2 AlTaO 7 , the Gd 2 AlTaO 7 has greater thermal conductivity owning to relatively weaker phonon scattering. Because of higher electro-negativity of Yb, the Yb 2 AlTaO 7 has lower coefficient of thermal expansion than Gd 2 AlTaO 7 . The RE 2 AlTaO 7 (RE = Gd and Yb) oxides also exhibit no phase-transition between ambient and 1473 K.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nuclear materials and radiation effects · Nuclear Materials and Properties · Microwave Dielectric Ceramics Synthesis
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