A non-isothermal crystn. of 3 La borate glasses of the La3O3.nB2O3 (n = 2, 3, 4) compns. were studied by differential thermal anal. The compns. corresponding to n = 2 and 4 lie in the stable immiscibility area and outside the glass-forming range, while the glass corresponding to n = 3 is situated in the middle of that range. The crystal phase formed the n = 2 glass with heating to the 1st of 2 DTA exo peaks was the aragonite form of LaBO3; that in n = 3 and 4 was LaB3O6. Heating the glasses to the 2nd exo peak resulted in no new phases obsd. in the n = 4 glass while an unidentified phase was obsd. in n = 2 and 3 glasses.
Non-isothermal crystallization of lanthanum-borate glasses / A., Marotta; V. N., Sigaev; E. V., Lopatina; Aronne, Antonio. - In: JOURNAL OF MATERIALS SCIENCE LETTERS. - ISSN 0261-8028. - STAMPA. - 15:(1996), pp. 145-148. [10.1007/BF00291450]
Non-isothermal crystallization of lanthanum-borate glasses
ARONNE, ANTONIO
1996
Abstract
A non-isothermal crystn. of 3 La borate glasses of the La3O3.nB2O3 (n = 2, 3, 4) compns. were studied by differential thermal anal. The compns. corresponding to n = 2 and 4 lie in the stable immiscibility area and outside the glass-forming range, while the glass corresponding to n = 3 is situated in the middle of that range. The crystal phase formed the n = 2 glass with heating to the 1st of 2 DTA exo peaks was the aragonite form of LaBO3; that in n = 3 and 4 was LaB3O6. Heating the glasses to the 2nd exo peak resulted in no new phases obsd. in the n = 4 glass while an unidentified phase was obsd. in n = 2 and 3 glasses.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
