Tunable Linear Thermal Expansion Coefficient of Amorphous Zirconium Tungstate
Zirconium tungstate (α‐ZrW2O8) exhibits isotropic negative thermal expansion over a wide range of temperatures. Under high pressure it transforms to a metastable amorphous phase with positive thermal expansion coefficient. α‐ZrW2O8 can be fully recovered by annealing the amorphous phase at temperatu...
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| Veröffentlicht in: | Journal of the American Ceramic Society 2006-07, Vol.89 (7), p.2341-2344 |
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| container_title | Journal of the American Ceramic Society |
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| creator | Catafesta, Jadna Zorzi, Janete E. Perottoni, Cláudio A. Gallas, Márcia R. Da Jornada, João Alziro H. |
| description | Zirconium tungstate (α‐ZrW2O8) exhibits isotropic negative thermal expansion over a wide range of temperatures. Under high pressure it transforms to a metastable amorphous phase with positive thermal expansion coefficient. α‐ZrW2O8 can be fully recovered by annealing the amorphous phase at temperatures slightly above 600°C, at room pressure. In this work, we describe the dependency of the linear thermal expansion coefficient of amorphous ZrW2O8 with the annealing temperature, showing that it can be continuously tuned, in two stages, from about 7.5° to −9°C−1. These two stages are related to the relaxation of the amorphous phase and the onset of recrystallization, respectively. |
| doi_str_mv | 10.1111/j.1551-2916.2006.01019.x |
| format | Article |
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Under high pressure it transforms to a metastable amorphous phase with positive thermal expansion coefficient. α‐ZrW2O8 can be fully recovered by annealing the amorphous phase at temperatures slightly above 600°C, at room pressure. In this work, we describe the dependency of the linear thermal expansion coefficient of amorphous ZrW2O8 with the annealing temperature, showing that it can be continuously tuned, in two stages, from about 7.5° to −9°C−1. 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| ispartof | Journal of the American Ceramic Society, 2006-07, Vol.89 (7), p.2341-2344 |
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| subjects | Annealing Calibration Ceramics Condensed matter: structure, mechanical and thermal properties Exact sciences and technology Graphite Phase transformations Physics Recrystallization Thermal cycling Thermal expansion Thermal properties of amorphous solids and glasses : heat capacity, thermal expansion Thermal properties of amorphous solids and glasses: heat capacity, thermal expansion, etc Thermal properties of condensed matter Transforms Tungstates Zirconium |
| title | Tunable Linear Thermal Expansion Coefficient of Amorphous Zirconium Tungstate |
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