Reaction between calcium-doped lanthanum chromite and silica
- National Institute of Materials and Chemical Research, Tsukuba, Ibaraki (Japan). Tsukuba Research Center
Calcium-doped lanthanum chromite reacted with silica to form silicates and chromium oxide at 1,473--1,773K. A reaction mechanism was proposed at each temperature. At 1,473 K, a reaction zone was observed in two areas: one was the bulk reaction area where silicates and chromium oxide were formed near the reaction interface; the other was the grain boundary reaction where chromium oxide and calcium silicate spots were formed far from the reaction interface. Above 1,673 K, silicates in the La{sub 2}O-CaO-SiO{sub 2} system and chromium oxide were formed simultaneously in the reaction zone with no grain boundary reaction. No layered reaction products were observed in the reaction zone of the lanthanum chromite side. Formation of melt silicates above 1,723 K at the reaction interface resulted in strong bonding between calcium-doped lanthanum chromite and silica.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 103607
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 7 Vol. 78; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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