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Intensity<br />
BSF5-IV; 600 0 C, 2 h<br />
BSF5-III; 575 0 C, 32 h<br />
BSF5-II; 575 0 C, 8 h<br />
BSF5-I; 575 0 C, 2 h<br />
BSF5-0; 550 0 C, 2 h<br />
10 20 30 40 50 60 70<br />
2θ (<strong>de</strong>gree)<br />
Fig. 21. Difractogramele corespunzatoare probei <strong>de</strong> sticla BSF5 pentru diferite conditii <strong>de</strong><br />
tratament termic - <strong>de</strong> recoacere (BSF7-0) respectiv <strong>de</strong> cristalizare (BSF5-I ÷ BSF5-IV)<br />
Analiza cantitativa efectuata pentru probele vitroceramice BSF1 ÷BSF5, in conditii<br />
<strong>de</strong> tratament termic <strong>de</strong> recoacere la 550 0 C, palier 2-9 ore, a evi<strong>de</strong>ntiat o structura<br />
nanocristalina pe baza <strong>de</strong> cristale majoritare <strong>de</strong> magnetit cu dmensiuni cuprinse intre 25-<br />
76 nm si cu un grad <strong>de</strong> cristalinitate cuprins intre 51-69%, raportat la faza vitroasa<br />
reziduala.<br />
31