کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10620806 | 988702 | 2009 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Crystal structure and hydrogen absorption-desorption properties of Ca3Mg2Ni13
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Crystal structure and hydrogen absorption-desorption properties of Ca3Mg2Ni13 Crystal structure and hydrogen absorption-desorption properties of Ca3Mg2Ni13](/preview/png/10620806.png)
چکیده انگلیسی
The novel compound Ca3Mg2Ni13 has been found in the Ca-Mg-Ni system, and its crystal structure has been investigated by X-ray diffraction and high-resolution transmission electron microscopy. Ca3Mg2Ni13 crystallizes in space group R3¯m (No. 166); cell parameters: a = 4.9783(2) Ã
and c = 36.180(2) Ã
; ZÂ =Â 3. The Ca3Mg2Ni13 structure has three blocks stacked along the c axis in one period, and each block is composed of two sub-blocks. One only contains one layer of [CaMgNi4] units, and the other consists of one layer of [CaMgNi4] units and one layer of [CaNi5] units. Further investigations show that Ca3Mg2Ni13 has good kinetic properties but bad thermodynamic properties for hydrogen absorption-desorption. However, the Ca/Mg ratio of the Ca3Mg2Ni13-type compound can be adjusted within a wide range to improve the hydrogen absorption-desorption properties. As a result, Ca1.67Mg3.33Ni13 shows favorable thermodynamics and has good reversibility for hydrogen absorption-desorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 57, Issue 6, April 2009, Pages 2002-2009
Journal: Acta Materialia - Volume 57, Issue 6, April 2009, Pages 2002-2009
نویسندگان
Q.A. Zhang, G. Pang, T.Z. Si, D.M. Liu,