Ethylene glycol assisted low-temperature synthesis of boron carbide powder from borate citrate precursors
B4C powders were synthesized by carbothermal reduction of ethylene glycol (EG) added borate citrate precursors, and effects of EG additions (0–50 mol% based on citric acid) on the morphologies and yields of synthesized B4C powders were investigated. The conditions most suitable for the preparation o...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2014-09-01
|
| Series: | Journal of Asian Ceramic Societies |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2187076414000591 |
| _version_ | 1818607629765705728 |
|---|---|
| author | Rafi-ud-din G.H. Zahid Z. Asghar Muhammad Maqbool Ejaz Ahmad Tanvir Azhar Tayyab Subhani M. Shahzad |
| author_facet | Rafi-ud-din G.H. Zahid Z. Asghar Muhammad Maqbool Ejaz Ahmad Tanvir Azhar Tayyab Subhani M. Shahzad |
| author_sort | Rafi-ud-din |
| collection | DOAJ |
| description | B4C powders were synthesized by carbothermal reduction of ethylene glycol (EG) added borate citrate precursors, and effects of EG additions (0–50 mol% based on citric acid) on the morphologies and yields of synthesized B4C powders were investigated. The conditions most suitable for the preparation of precursor were optimized and optimum temperature for precursor formation was 650 °C. EG additions facilitated low-temperature synthesis of B4C at 1350 °C, which was around 100–300 °C lower temperature compared to that without EG additions. The lowering of synthesis temperature was ascribed to the enlargement of interfacial area caused by superior homogeneity and dispersibility of precursors enabling the diffusion of reacting species facile. The 20% EG addition was optimal with free residual carbon lowered to 4%. For smaller EG additions, the polyhedral and rod-like particles of synthesized product co-existed. With higher EG additions, the morphology of synthesized product was transformed into needle and blade-like structure. |
| first_indexed | 2024-12-16T14:29:48Z |
| format | Article |
| id | doaj.art-7699762f54b742b69a07710010bf6ab1 |
| institution | Directory Open Access Journal |
| issn | 2187-0764 |
| language | English |
| last_indexed | 2024-12-16T14:29:48Z |
| publishDate | 2014-09-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Asian Ceramic Societies |
| spelling | doaj.art-7699762f54b742b69a07710010bf6ab12022-12-21T22:28:16ZengTaylor & Francis GroupJournal of Asian Ceramic Societies2187-07642014-09-012326827410.1016/j.jascer.2014.05.011Ethylene glycol assisted low-temperature synthesis of boron carbide powder from borate citrate precursorsRafi-ud-din0G.H. Zahid1Z. Asghar2Muhammad Maqbool3Ejaz Ahmad4Tanvir Azhar5Tayyab Subhani6M. Shahzad7Materials Division, PINSTECH, Nilore, Islamabad, PakistanMaterials Division, PINSTECH, Nilore, Islamabad, PakistanMaterials Division, PINSTECH, Nilore, Islamabad, PakistanDepartment of Materials Science and Engineering, Institute of Space Technology, Islamabad, PakistanMaterials Division, PINSTECH, Nilore, Islamabad, PakistanMaterials Division, PINSTECH, Nilore, Islamabad, PakistanDepartment of Materials Science and Engineering, Institute of Space Technology, Islamabad, PakistanMaterials Division, PINSTECH, Nilore, Islamabad, PakistanB4C powders were synthesized by carbothermal reduction of ethylene glycol (EG) added borate citrate precursors, and effects of EG additions (0–50 mol% based on citric acid) on the morphologies and yields of synthesized B4C powders were investigated. The conditions most suitable for the preparation of precursor were optimized and optimum temperature for precursor formation was 650 °C. EG additions facilitated low-temperature synthesis of B4C at 1350 °C, which was around 100–300 °C lower temperature compared to that without EG additions. The lowering of synthesis temperature was ascribed to the enlargement of interfacial area caused by superior homogeneity and dispersibility of precursors enabling the diffusion of reacting species facile. The 20% EG addition was optimal with free residual carbon lowered to 4%. For smaller EG additions, the polyhedral and rod-like particles of synthesized product co-existed. With higher EG additions, the morphology of synthesized product was transformed into needle and blade-like structure.http://www.sciencedirect.com/science/article/pii/S2187076414000591Boron carbide (B4C)PrecursorsLow-temperature synthesisMicrostructureSpectroscopyEthylene glycol |
| spellingShingle | Rafi-ud-din G.H. Zahid Z. Asghar Muhammad Maqbool Ejaz Ahmad Tanvir Azhar Tayyab Subhani M. Shahzad Ethylene glycol assisted low-temperature synthesis of boron carbide powder from borate citrate precursors Journal of Asian Ceramic Societies Boron carbide (B4C) Precursors Low-temperature synthesis Microstructure Spectroscopy Ethylene glycol |
| title | Ethylene glycol assisted low-temperature synthesis of boron carbide powder from borate citrate precursors |
| title_full | Ethylene glycol assisted low-temperature synthesis of boron carbide powder from borate citrate precursors |
| title_fullStr | Ethylene glycol assisted low-temperature synthesis of boron carbide powder from borate citrate precursors |
| title_full_unstemmed | Ethylene glycol assisted low-temperature synthesis of boron carbide powder from borate citrate precursors |
| title_short | Ethylene glycol assisted low-temperature synthesis of boron carbide powder from borate citrate precursors |
| title_sort | ethylene glycol assisted low temperature synthesis of boron carbide powder from borate citrate precursors |
| topic | Boron carbide (B4C) Precursors Low-temperature synthesis Microstructure Spectroscopy Ethylene glycol |
| url | http://www.sciencedirect.com/science/article/pii/S2187076414000591 |
| work_keys_str_mv | AT rafiuddin ethyleneglycolassistedlowtemperaturesynthesisofboroncarbidepowderfromboratecitrateprecursors AT ghzahid ethyleneglycolassistedlowtemperaturesynthesisofboroncarbidepowderfromboratecitrateprecursors AT zasghar ethyleneglycolassistedlowtemperaturesynthesisofboroncarbidepowderfromboratecitrateprecursors AT muhammadmaqbool ethyleneglycolassistedlowtemperaturesynthesisofboroncarbidepowderfromboratecitrateprecursors AT ejazahmad ethyleneglycolassistedlowtemperaturesynthesisofboroncarbidepowderfromboratecitrateprecursors AT tanvirazhar ethyleneglycolassistedlowtemperaturesynthesisofboroncarbidepowderfromboratecitrateprecursors AT tayyabsubhani ethyleneglycolassistedlowtemperaturesynthesisofboroncarbidepowderfromboratecitrateprecursors AT mshahzad ethyleneglycolassistedlowtemperaturesynthesisofboroncarbidepowderfromboratecitrateprecursors |