Phase formation of boron carbide powder synthesized from glutinous rice flour
Abstract
Boron carbide is an attractive material because of its very high hardness and low density. A number of synthesis processes to produce various forms of boron carbide powders have been reported. In this study, the feasibility of boron carbide synthesis using an inexpensive carbon source, glutinous rice flour, was investigated. Boric acid and glutinous rice flour with the molar ratios, ranging from 2:1 to 4:1, were homogeneously mixed with deionized water at 80°C. The mixtures were dried and pyrolyzed at 700°C for 2 h in air. The phase present and the carbon: boron oxide molar ratio of the pyrolyzed precursor were determined in order to control boron and carbon contents for the synthesis process. The precursor was synthesized under an Ar flow in a tube furnace at 1350°C - 1450°C for 1, 3 and 5 h. Phase analysis, chemical bonding and morphology of the synthesized powder were identified by X-ray diffraction, Fourier-transform infrared spectroscopy and scanning electron microscopy, respectively. It was found that formation of B4C as a major phase was observed at 1450°C, though unreacted B2O3 and carbon still persisted in the final product. In addition, the composition with large number of hydroxyl group showed the B4C phase formation at lower temperature and shorter soaking time.Downloads
Download data is not yet available.
Downloads
Published
2019-09-30
How to Cite
[1]
K. Dateraksa and S. Sinchai, “Phase formation of boron carbide powder synthesized from glutinous rice flour”, J. Met. Mater. Miner., vol. 29, no. 3, Sep. 2019.
Issue
Section
Original Research Articles
License
Authors who publish with this journal agree to the following terms:- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.