کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9709204 | 1466797 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A note on the peculiarities of producing of high-temperature super-conducting polymer-ceramic composites
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
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چکیده انگلیسی
High-temperature super-conducting polymer-ceramic composites were obtained based on Y1Ba2Cu3O7âx and a range of binders. Independent of the matrix type used, superconducting properties of the samples are missing (Maisner effect is absent) for the polymer-ceramic composites, formed by the hot pressing method at 200 °C. Restoration of superconducting processes occurs only after treatment of samples in the stream of dry oxygen at α-transition temperature of the polymeric binder. Articles formed at 130 °C possess stable superconducting properties. And polyolefin binder, preserve the same critical superconducting (SC) transition parameters as the initial ceramic has, while acryl and vinyl homo- and co-polymers enhance the critical SC initiation transition temperature by 1-2 °C. Broadening of SC transition temperature interval of the composites at higher temperatures of formation (â¥160 °C) is associated with thermo-oxidation destruction of the polymeric binder. Factors facilitating to the decline of destruction of the matrix reducing pressing duration, addition of anti-oxidants) allows to uphold the critical SC transition parameters of the initial ceramic. Polymerization methods of obtainment of polymer-ceramic composites permit to enhance SC characteristics of the materials versus the initial ceramic.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 160, Issue 3, 30 March 2005, Pages 306-312
Journal: Journal of Materials Processing Technology - Volume 160, Issue 3, 30 March 2005, Pages 306-312
نویسندگان
S.P. Davtyan, A.O. Tonoyan, S.M. Hayrapetyan, L.S. Manukyan,