通过作者查论文: Adrian Volceanov

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作者: Adrian Volceanov
摘要: Basicity of glass is still a challenge in spite of various attempts to measure or calculate it. The values assigned for basicity of glasses, either calculated or experimentally determined, are not always in full agreement with actual facts, and discrepancies among the theoretical ones are not unusual. For instance, SiO2 is described by a single basicity value even if the polymorphs of SiO2 are quite different. Only few attempts were made to face this challenge. Present paper deals with a novel approach on theoretical ionicity / basicity based on electronic energy levels or band structure of solids. Another major adjustment takes into account the possibility of decomposing ionicity of complex chemical bondings into a sum of binary bondings. Considering the distribution of the interbonding angles specific for vitreous systems, it is possible to estimate both a local ionicity (basicity) of bondings and a global (mean) basicity of glass. The variation of basicity (ionicity) with temperature is also presented, this finding being able to open a new view on thermal history of glass considered through chemical character of bondings.
129
作者: Eniko Volceanov, A. Abagiu, M. Becherescu, Adrian Volceanov, P. Niţă, R. Truşcă, Floarea Mihalache
1739
作者: Eniko Volceanov, Ştefania Motoc, Adrian Volceanov, Rodica M. Neagu, Cristian Coman
2283
作者: Ion Teoreanu, A. Folea, Adrian Volceanov
1203
作者: Eniko Volceanov, Adrian Volceanov, Ştefania Iacob, Radu Constantin
695
作者: Vasilica Dima, Adrian Volceanov, Mihai Eftimie, Adriana Petrescu, Maria Ionescu, Nicolae Ziman, Eniko Volceanov
摘要: The main purpose of the paper is to present results of experiments concerning E-glass fibers waste with a content of 7% B2O3 for obtaining glazes for tableware ceramics, as well as to study the consequences upon fabrication technology. The results are encouraging and make possible the use of E-glass fibers waste for preparation of vitreous glazes.
663
作者: Eniko Volceanov, A.M. Gurban, Adrian Volceanov, P. Niţă
993
作者: Eniko Volceanov, Adrian Pantea, Maria Georgescu, Adrian Volceanov, B. Matović
1834
作者: Eniko Volceanov, Adrian Volceanov, Adrian Pantea, Adela Apostol
833
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