کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1530196 | 1511989 | 2010 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal transformation and ionic conductivity of ammonium ion-exchanger prepared from Na-4-mica
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
Ammonium ion exchange of Na-4-mica and thermal transformation of the ion-exchanger were investigated and the conductivities of the heated ion-exchangers were estimated. More than 95.4% of Na+ ions in the interlayer of the Na-4-mica could be substituted by NH4+ ions after repeating ion exchange four times. Almost of NH4+ ions remained in the interlayer at 700 °C and they were completely decomposed into protons at 900 °C. The conductivities of the ion-exchangers heated at 700-900 °C were 10â7-10â6 S/cm at 700 °C. The conduction mechanism of the ion-exchangers heated at 700 and 800 °C was NH4+ ion migration in the interlayer and that of the ion-exchanger heated at 900 °C was proton migration. However, the contribution of residual Na+ ions to the conduction cannot be excluded.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: B - Volume 173, Issues 1â3, 15 October 2010, Pages 271-274
Journal: Materials Science and Engineering: B - Volume 173, Issues 1â3, 15 October 2010, Pages 271-274
نویسندگان
Seiichi Taruta, Takashi Kaga, Tomohiro Yamaguchi, Kunio Kitajima,