Fabrication and characterization of high entropy pyrochlore ceramics
Аутори
Matović, BrankoZagorac, Dejan
Cvijović-Alagić, Ivana
Zagorac, Jelena
Butulija, Svetlana
Erčić, Jelena
Hanzel, Ondrej
Sedlak, Richard
Lisnichuk, Maksym
Tatarko, Peter
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
High-entropy rare-earth (RE) zirconates with pyrochlore structure were successfully fabricated by pressureless and spark plasma sintering. RE2Zr2O7 compound with nominal composition (La0.2Y0.2Gd0.2Nd0.2Sm0.2)Zr2O7 was prepared by simple glycine nitrate procedure (GNP). GNP process yielded powders with low crystallinity and after subsequent calcination, well crystalline ceramics were formed. During calcination defective fluorite (F-RE2Zr2O7) and crystal pyrochlore (Py-RE2Zr2O7) structures coexist. Formation of pure crystalline pyrochlore occurs after sintering at 1450 C. High-density ceramics, free of any additives, were obtained after powders compaction and pressureless (PS), as well as Field Assisted Sintering Technique (FAST) at 1450 C. Theoretical investigations of the high-entropy RE2Zr2O7 pyrochlore systems were performed. Unit cell parameter of the obtained Py-RE2Zr2O7 is 10.5892(2) Å and 10.5999(2) Å for PS and FAST sintering, respectively, which is in good agreement with the ...results of Density Functional Theory (DFT) calculations. The thermal diffusivity of sintered samples at room temperature was ~0.7 mm2 /s for both sintering methods.
Извор:
23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts, 2022, XLV, 115-Издавач:
- Belgrade : Materials Research Society of Serbia – MRS-Serbia
Колекције
Институција/група
VinčaTY - CONF AU - Matović, Branko AU - Zagorac, Dejan AU - Cvijović-Alagić, Ivana AU - Zagorac, Jelena AU - Butulija, Svetlana AU - Erčić, Jelena AU - Hanzel, Ondrej AU - Sedlak, Richard AU - Lisnichuk, Maksym AU - Tatarko, Peter PY - 2022 UR - https://vinar.vin.bg.ac.rs/handle/123456789/11332 AB - High-entropy rare-earth (RE) zirconates with pyrochlore structure were successfully fabricated by pressureless and spark plasma sintering. RE2Zr2O7 compound with nominal composition (La0.2Y0.2Gd0.2Nd0.2Sm0.2)Zr2O7 was prepared by simple glycine nitrate procedure (GNP). GNP process yielded powders with low crystallinity and after subsequent calcination, well crystalline ceramics were formed. During calcination defective fluorite (F-RE2Zr2O7) and crystal pyrochlore (Py-RE2Zr2O7) structures coexist. Formation of pure crystalline pyrochlore occurs after sintering at 1450 C. High-density ceramics, free of any additives, were obtained after powders compaction and pressureless (PS), as well as Field Assisted Sintering Technique (FAST) at 1450 C. Theoretical investigations of the high-entropy RE2Zr2O7 pyrochlore systems were performed. Unit cell parameter of the obtained Py-RE2Zr2O7 is 10.5892(2) Å and 10.5999(2) Å for PS and FAST sintering, respectively, which is in good agreement with the results of Density Functional Theory (DFT) calculations. The thermal diffusivity of sintered samples at room temperature was ~0.7 mm2 /s for both sintering methods. PB - Belgrade : Materials Research Society of Serbia – MRS-Serbia C3 - 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts T1 - Fabrication and characterization of high entropy pyrochlore ceramics VL - XLV SP - 115 UR - https://hdl.handle.net/21.15107/rcub_vinar_11332 ER -
@conference{ author = "Matović, Branko and Zagorac, Dejan and Cvijović-Alagić, Ivana and Zagorac, Jelena and Butulija, Svetlana and Erčić, Jelena and Hanzel, Ondrej and Sedlak, Richard and Lisnichuk, Maksym and Tatarko, Peter", year = "2022", abstract = "High-entropy rare-earth (RE) zirconates with pyrochlore structure were successfully fabricated by pressureless and spark plasma sintering. RE2Zr2O7 compound with nominal composition (La0.2Y0.2Gd0.2Nd0.2Sm0.2)Zr2O7 was prepared by simple glycine nitrate procedure (GNP). GNP process yielded powders with low crystallinity and after subsequent calcination, well crystalline ceramics were formed. During calcination defective fluorite (F-RE2Zr2O7) and crystal pyrochlore (Py-RE2Zr2O7) structures coexist. Formation of pure crystalline pyrochlore occurs after sintering at 1450 C. High-density ceramics, free of any additives, were obtained after powders compaction and pressureless (PS), as well as Field Assisted Sintering Technique (FAST) at 1450 C. Theoretical investigations of the high-entropy RE2Zr2O7 pyrochlore systems were performed. Unit cell parameter of the obtained Py-RE2Zr2O7 is 10.5892(2) Å and 10.5999(2) Å for PS and FAST sintering, respectively, which is in good agreement with the results of Density Functional Theory (DFT) calculations. The thermal diffusivity of sintered samples at room temperature was ~0.7 mm2 /s for both sintering methods.", publisher = "Belgrade : Materials Research Society of Serbia – MRS-Serbia", journal = "23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts", title = "Fabrication and characterization of high entropy pyrochlore ceramics", volume = "XLV", pages = "115", url = "https://hdl.handle.net/21.15107/rcub_vinar_11332" }
Matović, B., Zagorac, D., Cvijović-Alagić, I., Zagorac, J., Butulija, S., Erčić, J., Hanzel, O., Sedlak, R., Lisnichuk, M.,& Tatarko, P.. (2022). Fabrication and characterization of high entropy pyrochlore ceramics. in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts Belgrade : Materials Research Society of Serbia – MRS-Serbia., XLV, 115. https://hdl.handle.net/21.15107/rcub_vinar_11332
Matović B, Zagorac D, Cvijović-Alagić I, Zagorac J, Butulija S, Erčić J, Hanzel O, Sedlak R, Lisnichuk M, Tatarko P. Fabrication and characterization of high entropy pyrochlore ceramics. in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts. 2022;XLV:115. https://hdl.handle.net/21.15107/rcub_vinar_11332 .
Matović, Branko, Zagorac, Dejan, Cvijović-Alagić, Ivana, Zagorac, Jelena, Butulija, Svetlana, Erčić, Jelena, Hanzel, Ondrej, Sedlak, Richard, Lisnichuk, Maksym, Tatarko, Peter, "Fabrication and characterization of high entropy pyrochlore ceramics" in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts, XLV (2022):115, https://hdl.handle.net/21.15107/rcub_vinar_11332 .