کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1483317 1510534 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Slow dynamic properties of molten silver halides
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Slow dynamic properties of molten silver halides
چکیده انگلیسی

The sound absorption has been measured for molten AgCl–AgI mixtures to investigate the relation between the dynamic properties and chemical bonding. The sound absorption for molten AgI shows a large value just above the melting temperature, and decreases with increasing temperature. The sound absorption for molten mixtures around the eutectic composition increases with temperature from the melting point, showing maximum value around 580 °C, and decreases with increasing temperature. The frequency dependence of the sound absorption for molten AgI and mixtures are also measured, and the relaxation time and relaxation strength are evaluated from the observed data by assuming single Debye-type relaxation process. The evaluated relaxation time for molten AgI is about 9.0 ns just above melting temperature and decreases slightly with temperature to about 6.4 ns at 750 °C. This relaxation time corresponds to a quite slow motion compared with the ordinary atomic one, and may suggest a structural relaxation of atomic association between ionic and covalent character. In the mixture around the eutectic region, evaluated relaxation time shows a rather complicated temperature dependence. Those values decreases slightly with temperature from the melting temperature, and have a minimum value around 600 °C, and then slightly increase with the temperature.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 353, Issues 32–40, 15 October 2007, Pages 3169–3173
نویسندگان
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