Chaudhuri (nee Nath), M and Kumar , A and Banerjee, Goutam (1993) Microstructural evaluation of bio-leached, sintered cryptocrystalline natural Indian magnesite with titania addition. Transactions of the Indian Ceramic Society, 52 (3). pp. 95-99. ISSN 0371-750X

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The sintering and grain growth characteristics of natural cryptocrystalline magnesite from Salem, India, have been compared to samples that were bio-leached to reduce the silica content. Pressed compacts with the above magnesites without titania and with addition between 0.05 and 0.5 wt% of the original magnesite have been fired between 1450° and 1700°C with one to four hours soaking. The resultant compacts have been evaluated for their sintering behaviour and grain growth using optical microscopy and scanning electron microsocpy. Results show that the natural magnesite after bio-leaching of silica contained a high degree of direct bonding with low liquid phase content compared to the parent magnesite. A virtual absence of porosity and significant grain growth due to bio-leaching is observed. The presence of titania enhances the sintering at lower temperature and provides faster grain growth. Microstructure of samples are discussed in detail.

Item Type: Article
Subjects: Refractories
Depositing User: Bidhan Chaudhuri
Date Deposited: 22 Aug 2013 09:18
Last Modified: 04 Mar 2016 18:06

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