Zero-Stress Optic Glass without Lead

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• 作者：M. Guignard ; L. Albrecht ; J. W. Zwanziger
• 刊名：Chemistry of Materials
• 出版年：2007
• 出版时间：January 23, 2007
• 年：2007
• 卷：19
• 期：2
• 页码：286 - 290
• 全文大小：104K
• 年卷期：v.19,no.2(January 23, 2007)
• ISSN：1520-5002

文摘

By comparing data on a variety of examples, an empirical correlation for the photoelastic response ofsimple metal oxides is discovered and used to predict new families of zero-stress optic glasses. Thebirefringence induced by uniaxial stress on glass is found to correlate well with the ratio of the metaloxygen bond metallicity to the metal coordination number; the metallicity itself is quantified through themetal oxygen bond length. This correlation was obtained by consideration of the stress optic response ofa number of oxide crystals, obtained both from the literature when possible and also from first principlescalculations. The correlation obtained provides a simple rule for choosing the composition of oxide glassso as to minimize the stress optic response; this rule is shown to agree with known data on lead oxideglasses and to predict the existence of previously unknown lead-free, zero-stress optic glasses. Theseglasses were then synthesized, tested, and shown to give the predicted response.