Synthesis of sodium β and β" alumina

Ray, A. K. ; Subbarao, E. C. (1975) Synthesis of sodium β and β" alumina Materials Research Bulletin, 10 (6). pp. 583-590. ISSN 0025-5408

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Sodium β and β " alumina, with and without MgO doping, have been synthesized from Na2CO3, α Al2O3 and MgO. Experimental problems, such as segregation, have been emphasized. β Al2O3, with and without MgO, once formed is stable at least up to 1700° C. β " Al2O3 decomposes at 1450° C, whereas MgO-stabilized β " Al2O3 is stable at 1450° C but not at 1650° C.

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