Panneerselvam, M. ; Rao, K. J. (2003) A microwave method for the preparation and sintering of β'-SiAlON Materials Research Bulletin, 38 (4). pp. 663-674. ISSN 0025-5408
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/S0025-5408(02)01071-1
Abstract
A microwave-assisted carbothermal reduction and nitridation (CTR/N) method has been used for successful preparation of monophasic β '-SiAlON starting from kaolinite and carbon black. Phase pure β'-SiAlON has been obtained in under 60 min in microwave field. The z value of microwave prepared β'-SiAlON is found to be 2.95, which is very close to the expected value from kaolinite composition. Formation of β '-SiAlON has been monitored with XRD and MASNMR of and ; the possible reaction mechanism has been discussed. Kaolinite to β'-SiAlON conversion appears to be a very rapid single-step reaction under microwave irradiation. β'-SiAlON powders have been microwave sintered to 98.7% of theoretical density in 30 min.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Ceramics; Chemical Synthesis; NMR; X-ray Diffraction |
| ID Code: | 91046 |
| Deposited On: | 16 May 2012 08:33 |
| Last Modified: | 16 May 2012 08:33 |
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