AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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The STUDIA UNIVERSITATIS BABEÅ˛-BOLYAI issue article summary The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name. |
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STUDIA PHYSICA - Issue no. 2 / 2003 | |||||||
Article: |
STRUCTURAL STABILITY OF SOME PHOSPHATE GLASSES. Authors: S. SIMON, D. CACAINA, I. BALASZ. |
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Abstract: Glasses of x (Nb2O5•Li2O)(100-x)[P2O5•CaO] system with 0 £ x £ 20 mol % were investigated by differential thermal analysis (DTA). Thermal differential data obtained at different heating rate were used to determine the activation energy of crystallisation (Et), while the thermal stability was appreciated at same heating rate for all samples. DTA results lead to close values for the activation energy for both x = 1 and 5 mol % and a clearly higher value for x = 3 mol %. The highest glass stability was also obtained for x = 3 mol % and decreases by further addition of Nb2O5 and Li2O up to x = 20 mol %. | |||||||