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Thermal barrier materials of Yb 2 O 3 -ZrO 2 system synthesized by laser excitation
A low-cost and minimal-processing-step method is demonstrated to synthesize Yb 2 O 3 -ZrO 2 system by laser excitation catalyzed solid-state reaction. With 980 nm CW laser irradiating, near-resonant excitation of Yb 3+ ions can obviously enhance solid state reaction. As the molar content of Yb 2 O 3...
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| Published in: | Materials research express 2020-05, Vol.7 (5), p.55201 |
|---|---|
| Main Authors: | , , , , , , |
| Format: | Article |
| Language: | English |
| Citations: | Items that this one cites Items that cite this one |
| Online Access: | Get full text |
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| Summary: | A low-cost and minimal-processing-step method is demonstrated to synthesize Yb
2
O
3
-ZrO
2
system by laser excitation catalyzed solid-state reaction. With 980 nm CW laser irradiating, near-resonant excitation of Yb
3+
ions can obviously enhance solid state reaction. As the molar content of Yb
2
O
3
rises from 12.5% to 50%, the lattice parameter of Yb
2
O
3
-ZrO
2
ceramic increases distinctly. Among them, high crystal quality of Yb
2
Zr
2
O
7
and Yb
0.2
Zr
0.8
O
1.9
are synthesized at the laser power of 400 W for 10 s. Two obvious Raman peaks of Yb
2
Zr
2
O
7
represent increased Raman activity. X-ray photoelectron spectroscopy (XPS) and Impedance spectroscopy demonstrate the huge amount of the oxygen vacancies in Yb
0.2
Zr
0.8
O
1.9
. Yb
2
Zr
2
O
7
shows lowest thermal conductivity among all the ceramics studied, within the range of 0.497–0.730 W mK
−1
from 25 °C to 1200 °C, which indicates a promising thermal barrier material. |
|---|---|
| ISSN: | 2053-1591 2053-1591 |
| DOI: | 10.1088/2053-1591/ab8d63 |