Structural and electrical properties of geopolymer materials based on different precursors (kaolin, bentonite and diatomite)
Аутори
Kljajević, Ljiljana M.Melichova, Zuzana
Stojmenović, Marija
Todorović, Bratislav Ž
Pavlović, Vladimir B.
Čitaković, Nada
Nenadović, Snežana S.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Geopolymers (GP) were successfully synthesized from metabentonite (MB), metadiatomite (MD) and metakaolinite (MK). Characterization of their phase structure and microstructure was performed by XRD, FTIR, SEM/EDX methods. A SEM micrograph of GPMD shows a homogeneous surface with some longitudinal cavities in the gel, and it is significantly different from the micrographs of the other two geopolymer samples, GPMB and GPMK. A considerable amount of unreacted particles, as well as the presence of pores in the geopolymer matrix of GPMK and GPMD, indicate an incomplete reaction in the system. Aluminosilicate inorganic polymers, geopolymers, are quasi solid electrolytes which possess a high electrical conductivity at room temperature in relation to materials of similar chemical composition. The highest conductivity was found for the sample obtained from GPMK, amounting to 2.14 × 10–2 Ω–1cm–1at 700 ºC. The corresponding activation energies of conductivity for this sample amounted to 0.33 eV in... the temperature range of 500–700 ºC. The geopolymer synthesized from metakaolin has good ionic conductivity values, which recommends it for use as an alternative material for an SOFC (Solid Oxide Fuel Cell).
Кључне речи:
electrical conductivity / geopolymer / metabentonite / metadiatomite / metakaolinИзвор:
Macedonian Journal of Chemistry and Chemical Engineering, 2019, 38, 2, 283-292Издавач:
- Skopje : Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril & Methodius University
Финансирање / пројекти:
- Синтеза, процесирање и карактеризација наноструктурних материјала за примену у области енергије, механичког инжењерства, заштите животне стредине и биомедицине (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45012)
- Функционални, функционализовани и усавршени нано материјали (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45005)
- Slovak Grant Agency VEGA No. 1/0538/15
- Project "Restoration and construction of infrastructure for ecological and environ-mental research at Matej Bel University in Banská Bystrica", ITMS 26210120024
DOI: 10.20450/mjcce.2019.1678
ISSN: 1857-5625
WoS: 000508000900012
Scopus: 2-s2.0-85079366520
Институција/група
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Kljajević, Ljiljana M. AU - Melichova, Zuzana AU - Stojmenović, Marija AU - Todorović, Bratislav Ž AU - Pavlović, Vladimir B. AU - Čitaković, Nada AU - Nenadović, Snežana S. PY - 2019 UR - https://mjcce.org.mk/index.php/MJCCE/article/view/1678 UR - https://dais.sanu.ac.rs/123456789/7042 AB - Geopolymers (GP) were successfully synthesized from metabentonite (MB), metadiatomite (MD) and metakaolinite (MK). Characterization of their phase structure and microstructure was performed by XRD, FTIR, SEM/EDX methods. A SEM micrograph of GPMD shows a homogeneous surface with some longitudinal cavities in the gel, and it is significantly different from the micrographs of the other two geopolymer samples, GPMB and GPMK. A considerable amount of unreacted particles, as well as the presence of pores in the geopolymer matrix of GPMK and GPMD, indicate an incomplete reaction in the system. Aluminosilicate inorganic polymers, geopolymers, are quasi solid electrolytes which possess a high electrical conductivity at room temperature in relation to materials of similar chemical composition. The highest conductivity was found for the sample obtained from GPMK, amounting to 2.14 × 10–2 Ω–1cm–1at 700 ºC. The corresponding activation energies of conductivity for this sample amounted to 0.33 eV in the temperature range of 500–700 ºC. The geopolymer synthesized from metakaolin has good ionic conductivity values, which recommends it for use as an alternative material for an SOFC (Solid Oxide Fuel Cell). PB - Skopje : Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril & Methodius University T2 - Macedonian Journal of Chemistry and Chemical Engineering T1 - Structural and electrical properties of geopolymer materials based on different precursors (kaolin, bentonite and diatomite) SP - 283 EP - 292 VL - 38 IS - 2 DO - 10.20450/mjcce.2019.1678 UR - https://hdl.handle.net/21.15107/rcub_dais_7042 ER -
@article{ author = "Kljajević, Ljiljana M. and Melichova, Zuzana and Stojmenović, Marija and Todorović, Bratislav Ž and Pavlović, Vladimir B. and Čitaković, Nada and Nenadović, Snežana S.", year = "2019", abstract = "Geopolymers (GP) were successfully synthesized from metabentonite (MB), metadiatomite (MD) and metakaolinite (MK). Characterization of their phase structure and microstructure was performed by XRD, FTIR, SEM/EDX methods. A SEM micrograph of GPMD shows a homogeneous surface with some longitudinal cavities in the gel, and it is significantly different from the micrographs of the other two geopolymer samples, GPMB and GPMK. A considerable amount of unreacted particles, as well as the presence of pores in the geopolymer matrix of GPMK and GPMD, indicate an incomplete reaction in the system. Aluminosilicate inorganic polymers, geopolymers, are quasi solid electrolytes which possess a high electrical conductivity at room temperature in relation to materials of similar chemical composition. The highest conductivity was found for the sample obtained from GPMK, amounting to 2.14 × 10–2 Ω–1cm–1at 700 ºC. The corresponding activation energies of conductivity for this sample amounted to 0.33 eV in the temperature range of 500–700 ºC. The geopolymer synthesized from metakaolin has good ionic conductivity values, which recommends it for use as an alternative material for an SOFC (Solid Oxide Fuel Cell).", publisher = "Skopje : Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril & Methodius University", journal = "Macedonian Journal of Chemistry and Chemical Engineering", title = "Structural and electrical properties of geopolymer materials based on different precursors (kaolin, bentonite and diatomite)", pages = "283-292", volume = "38", number = "2", doi = "10.20450/mjcce.2019.1678", url = "https://hdl.handle.net/21.15107/rcub_dais_7042" }
Kljajević, L. M., Melichova, Z., Stojmenović, M., Todorović, B. Ž., Pavlović, V. B., Čitaković, N.,& Nenadović, S. S.. (2019). Structural and electrical properties of geopolymer materials based on different precursors (kaolin, bentonite and diatomite). in Macedonian Journal of Chemistry and Chemical Engineering Skopje : Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril & Methodius University., 38(2), 283-292. https://doi.org/10.20450/mjcce.2019.1678 https://hdl.handle.net/21.15107/rcub_dais_7042
Kljajević LM, Melichova Z, Stojmenović M, Todorović BŽ, Pavlović VB, Čitaković N, Nenadović SS. Structural and electrical properties of geopolymer materials based on different precursors (kaolin, bentonite and diatomite). in Macedonian Journal of Chemistry and Chemical Engineering. 2019;38(2):283-292. doi:10.20450/mjcce.2019.1678 https://hdl.handle.net/21.15107/rcub_dais_7042 .
Kljajević, Ljiljana M., Melichova, Zuzana, Stojmenović, Marija, Todorović, Bratislav Ž, Pavlović, Vladimir B., Čitaković, Nada, Nenadović, Snežana S., "Structural and electrical properties of geopolymer materials based on different precursors (kaolin, bentonite and diatomite)" in Macedonian Journal of Chemistry and Chemical Engineering, 38, no. 2 (2019):283-292, https://doi.org/10.20450/mjcce.2019.1678 ., https://hdl.handle.net/21.15107/rcub_dais_7042 .