کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1594605 | 1515667 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Isothermal compressibility and thermal expansion of nitrogen doped hafnia Hf7O11N2
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The isothermal compressibility of nitrogen doped hafnia (βⲠhafnium oxonitride, Hf7O11N2) has been measured at room temperature up to 28 GPa in a hydrostatic pressure medium, using a diamond anvil cell and X-ray powder diffraction. From a least squares fit to the third-order Birch-Murnaghan Equation of State the values for the bulk modulus and its first pressure derivative were determined to B0=269.4GPa and B0â²=14.9. The exceptionally high value for B0â² arises as consequence of vacancy ordering and subsequently the almost one-dimensional compression of Hf7O11N2 up to pressures of about 12 GPa. The thermal expansion was investigated using temperature dependent X-ray powder diffraction. The coefficient of thermal expansion was calculated according to αv=1/VâδV/δT=a0+a1âT. The parameters were determined to a0=10.389±2.296â10â6Kâ1 and a1=7.34±1.89â10â9Kâ2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 149, Issues 47â48, December 2009, Pages 2160-2163
Journal: Solid State Communications - Volume 149, Issues 47â48, December 2009, Pages 2160-2163
نویسندگان
T. Locherer, L. Dubrovinsky, H. Fuess,