Effect of CaO and CeO2 co-doping on thermo-physical properties of La2Z2O7
| Autor: | Lirong Luo, Chunhui Xu, Xiaohong Chang, Fujian He, Xiaocong Tian, Luhua Lu, Ying Chen, Shuen Hou, Hongyun Jin |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Journal of Asian Ceramic Societies, Vol 8, Iss 4, Pp 1010-1017 (2020) |
| Druh dokumentu: | article |
| ISSN: | 2187-0764 21870764 |
| DOI: | 10.1080/21870764.2020.1840700 |
| Popis: | Ce4+ and Ca2+ modified La2Zr2O7 samples, La2Zr2O7, (La0.8Ce0.2)2(Zr0.7Ce0.3)2O7.2 and (La0.6Ce0.2Ca0.2)2(Zr0.7Ce0.3)2O7, were prepared by the co-precipitation method to obtain enhanced thermos-physical properties. Compared with La2Zr2O7, (La0.8Ce0.2)2(Zr0.7Ce0.3)2O7.2 and (La0.6Ce0.2Ca0.2)2(Zr0.7Ce0.3)2O7 both exhibited better sintering resistance, lower thermal conductivities, and higher thermal expansion coefficients. The underlying mechanism of the improved thermo-physical performance of La2Zr2O7 induced by Ce4+ and Ca2+ doping was discussed. The thermal conductivity and thermal expansion coefficient of (La0.6Ce0.2Ca0.2)2(Zr0.7Ce0.3)2O7 were 1.165 W·m−1·K−1 at 1450°C and 10.91 × 10−6 K−1, respectively, making it a promising material for the thermal barrier coatings (TBCs). |
| Databáze: | Directory of Open Access Journals |
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